LE79R70-1DJCT [MICROSEMI]
SLIC, 2-4 Conversion, Bipolar, PQCC32, GREEN, PLASTIC, MS-016, LCC-32;型号: | LE79R70-1DJCT |
厂家: | Microsemi |
描述: | SLIC, 2-4 Conversion, Bipolar, PQCC32, GREEN, PLASTIC, MS-016, LCC-32 电池 电信 电信集成电路 |
文件: | 总22页 (文件大小:465K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
™
Le79R70
Ringing Subscriber Line Interface Circuit
VE580 Series
APPLICATIONS
Integrated Access Devices (IADs)
Network Interface Units (NIUs)
Cable Modems
DSL Modems
Set Top / House Side Boxes
Intelligent PBX
ORDERING INFORMATION
Device1
Package Type2, 3
Packing4
Tube
32-pin PLCC, No Pol. Rev.
(Green package)
Le79R70DJC
32-pin PLCC, Pol. Rev.
(Green package)
32-pin QFN, Pol. Rev.
(Green package)
Le79R70-1DJC
Le79R70-1FQC
Tube
Tray
1. Zarlink reserves the right to fulfill all orders for this device with
parts marked with the "Am" part number prefix until all inventory
bearing this mark has been depleted. Note that parts marked with
either the "Am" or the "Le" part number prefix are equivalent
devices in terms of form, fit, and function—the prefix appearing on
the topside mark is the only difference.
Pain Gain
FXS Cards
Voice over ISDN or T1/E1
Smart Residential Gateways
WLL, APON, FITL, NGN, and all other short-loop CPE/
2. The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
Enterprise telephony applications
FEATURES
Ideal for ISDN-TA and set top applications
On-chip ringing with on-chip ring-trip detector
Low Standby state power
3. Due to size constraints, QFN devices are marked by omitting the
“Le” prefix and the performance grade dash character. For
example, Le79R70-1QC is marked 79R701QC.
4. For delivery using a tape and reel packing system, add a "T" suffix
to the OPN (Ordering Part Number) when placing an order.
Battery operation:
— VBAT1: –40 V to –67 V
— VBAT2: –19 V to VBAT1
On-chip battery switching and feed selection
On-hook transmission
Polarity reversal option
Programmable constant-current feed
Programmable open circuit voltage
Programmable loop-detect threshold
Current gain = 1000
Two-wire impedance set by single component
Ground-key detector
DESCRIPTION
The Le79R70 Ringing Subscriber Line Interface Circuit
(RSLIC) device is a bipolar monolithic SLIC that offers on-chip
ringing. Designers can achieve significant cost reductions at
the system level for short-loop applications by integrating the
ringing function on chip. Examples of such applications would
be ISDN Terminal Adaptors and set top boxes. Using a CMOS-
compatible input waveform and wave shaping R-C network,
the Le79R70 Ringing SLIC device can provide trapezoidal
wave ringing to meet various design requirements.
Tip Open state for ground-start lines
Internal VEE regulator (no external –5 V power supply
required)
Two on-chip relay drivers and snubber circuits
Space-saving package options (8x8 QFN)
See the Le79R70 Block Diagram, on page 3.
RELATED LITERATURE
080917 VE790 Series RSLIC Device Product Brief
080158 Le79R70/79/100/101 Ringing SLIC Devices
Technical Overview
080255 Le71HE0040J Evaluation Board User’s Guide
080753 Le58QL02/021/031 QLSLAC™ Data Sheet
Document ID#: 080211 Date:
Sep 19, 2007
2
Rev:
J
Version:
Distribution:
Public Document
Le79R70
Data Sheet
TABLE OF CONTENTS
Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Related literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Environmental Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Relay Driver Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
DC Feed Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Ring-Trip Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Test Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Physical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
32-Pin PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
32-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision A to B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision B to C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision C to D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision D to E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision E to F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision F to G1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision G1 to H1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision H1 to I1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision I1 to J1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision J1 to J2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
2
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
PRODUCT DESCRIPTION
The Zarlink family of subscriber line interface circuit (SLIC) products provide the telephone interface functions required
throughout the worldwide market. Zarlink SLIC devices address all major telephony markets including central office (CO),
private branch exchange (PBX), digital loop carrier (DLC), fiber-in-the-loop (FITL), radio-in-the-loop (RITL), hybrid fiber coax
(HFC), and video telephony applications.
The Zarlink SLIC devices offer support of BORSHT (battery feed, over voltage protection, ringing, supervision, hybrid, and test)
functions with features including current limiting, on-hook transmission, polarity reversal, tip-open, and loop-current detection.
These features allow reduction of line card cost by minimizing component count, conserving board space, and supporting
automated manufacturing.
The Zarlink SLIC devices provide the two- to four-wire hybrid function, DC loop feed, and two-wire supervision. Two-wire
termination is programmed by a scaled impedance network. Transhybrid balance can be achieved with an external balance
circuit or simply programmed using a companion Zarlink codec/filter, such as the Le58QL0xx Quad SLAC (QLSLAC™) device.
The Le79R70 Ringing SLIC device is a bipolar monolithic SLIC that offers on-chip ringing. Now designers can achieve significant
cost reductions at the system level for short-loop applications by integrating the ringing function on chip. Examples of such
applications would be ISDN Terminal Adaptors and set top boxes. Using a CMOS-compatible input waveform and wave shaping
R-C network, the Le79R70 Ringing SLIC can provide trapezoidal wave ringing to meet various design requirements.
In order to further enhance the suitability of this device in short-loop, distributed switching applications, Zarlink has maximized
power savings by incorporating battery switching on chip. The Le79R70 Ringing SLIC device switches between two battery
supplies such that in the Off-hook (active) state, a low battery is used to save power. In order to meet the Open Circuit voltage
requirements of fax machines and maintenance termination units (MTU), the SLIC automatically switches to a higher voltage in
the On-hook (standby) state.
Like all of the Zarlink SLIC devices, the Le79R70 Ringing SLIC device supports on-hook transmission, ring-trip detection and
programmable loop-detect threshold. The Le79R70 Ringing SLIC device is a programmable constant-current feed device with
two on-chip relay drivers to operate external relays. This unique device is available in the proven Zarlink 75 V bipolar process.
Figure 1. Le79R70 Block Diagram
Relay
RYOUT2
RYE
Driver
RTRIP1
RTRIP2
Relay
Driver
RYOUT1
D1
D2
C1
C2
C3
E1
A(TIP)
HPA
Ring-Trip
Detector
Input Decoder
and Control
Ground-Key
Detector
Two-Wire
Interface
Off-Hook
Detector
DET
HPB
B(RING)
VBAT2
VBAT1
RD
VTX
RSN
Signal
Transmission
Power-Feed
Controller
RINGIN
RDC
RDCR
RSGL
RSGH
B2EN
Switch
Driver
VCC VNEG BGND AGND/DGND
3
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
CONNECTION DIAGRAM
4
3
2
1
32 31 30
RYE
5
RTRIP1
RTRIP2
HPB
29
28
27
26
25
RYOUT1
B2EN
6
7
8
9
VBAT1
D1
HPA
32-Pin PLCC
RINGIN
E1
C3
C2
RDCR
VTX
10
11
12
13
24
23
22
21
VNEG
RSN
DET
14 15 16 17 18 19 20
32 31
1
30 29
28 27
26 25
24
RYE
RTRIP2
HPB
2
23
RYOUT1
3
4
22
21
B2EN
HPA
VBAT1
RINGIN
32-pin QFN
5
6
20
19
D1
E1
RDCR
VTX
18
17
C3
C2
VNEG
RSN
7
8
Exposed Pad
9
10
11 12
13 14
15 16
Notes:
1. Pin 1 is marked for orientation.
2. NC = No connect
3. RSVD = Reserved. Do not connect to this pin.
4. The thermally enhanced QFN package features an exposed pad on the underside which must be electrically tied to VBAT1.
4
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
Pin Descriptions
Pin Names
AGND/DGND
A(TIP)
Type
Description
Gnd
Analog and digital ground are connected internally to a single pin.
Output of A(TIP) power amplifier.
Output
VBAT2 enable. Logic Low enables operation from VBAT2. Logic High enables operation from VBAT1. TTL
compatible.
B2EN
Input
BGND
B(RING)
C3–C1
D1
Gnd
Battery (power) ground
Output of B(RING) power amplifier.
Decoder. TTL compatible. C3 is MSB and C1 is LSB.
Relay1 control. TTL compatible. Logic Low activates the Relay1 relay driver.
(Option) Relay2 control. TTL compatible. Logic Low activates the Relay2 relay driver.
Output
Input
Input
Input
D2
Detector. Logic Low indicates that the selected detector is tripped. Logic inputs C3–C1 and E1 select the
DET
E1
Output
Input
detector. Open-collector with a built-in 15 kΩ pull-up resistor.
(Option) A logic High selects the off-hook detector. A logic Low selects the ground-key detector. TTL
compatible.
HPA
HPB
RD
Capacitor
Capacitor
Resistor
High-pass filter capacitor. A(TIP) side of high-pass filter capacitor.
High-pass filter capacitor. B(RING) side of high-pass filter capacitor.
Detect resistor. Threshold modification and filter point for the off-hook detector.
DC feed resistor. Connection point for the DC-feed current programming network, which also connects to the
receiver summing node (RSN). VRDC is negative for normal polarity and positive for reverse polarity.
RDC
Resistor
—
RDCR
RINGIN
RSGH
Connection point for feedback during ringing.
Ring Signal Input. Pin for ring signal input. Square-wave shaped by external RC filter. Requires 50% duty
cycle. CMOS-compatible input.
Input
Input
Saturation Guard High. Pin for resistor to adjust Open Circuit voltage when operating from VBAT1
Saturation Guard Low. Pin for resistor to adjust the anti-saturation cut-in voltage when operating from both
BAT1 and VBAT2
.
RSGL
Input
V
.
The metallic current (AC and DC) between A(TIP) and B(RING) is equal to 1000 x the current into this pin.
The networks that program receive gain, two-wire impedance, and feed resistance all connect to this node.
Ring-trip detector. Ring-trip detector threshold set and filter pin.
Ring-trip detector threshold offset (switch to VBAT1). For power conservation in any non-ringing state, this
switch is open.
RSN
Input
Input
Input
RTRIP1
RTRIP2
Common Emitter of RYOUT1/RYOUT2. Emitter output of RYOUT1 and RYOUT2. Normally connected to
relay ground.
RYE
Output
RYOUT1
RYOUT2
VBAT1
VBAT2
VCC
Output
Output
Battery
Battery
Power
Power
Relay/switch driver. Open-collector driver with emitter internally connected to RYE.
(Option) Relay/switch driver. Open-collector driver with emitter internally connected to RYE.
Battery supply and connection to substrate.
Power supply to output amplifiers. Connect to off-hook battery through a diode.
Positive analog power supply.
VNEG
Negative analog power supply. This pin is the return for the internal VEE regulator.
Transmit Audio. This output is a 0.5066 gain version of the A(TIP) and B(RING) metallic AC voltage. VTX also
sources the two-wire input impedance programming network.
This must be electrically tied to VBAT1.
VTX
Output
Battery
Exposed Pad
5
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Stresses above those listed under Absolute Maximum Ratings can cause permanent device failure. Functionality at or above
these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability.
Storage temperature
Ambient temperature under bias
VCC with respect to AGND/DGND
–55 to +150°C
0 to +70°C
0.4 to + 7 V
V
NEG with respect to AGND/DGND
VBAT2
BAT1 with respect to AGND/DGND:
0.4 V to VBAT2
VBAT2 to GND
V
Continuous
10 ms
BGND with respect to AGND/DGND
A (TIP) or B (RING) to BGND:
Continuous
+0.4 to -80 V
+0.4 to -85 V
+3 to -3 V
VBAT1 – 5 V+ 1 V
VBAT1 – 10 V+ 5 V
VBAT1 – 15 V+ 8 V
VBAT1 – 20 V+ 12 V
10 ms (F = 0.1 Hz)
1 µs (F = 0.1 Hz)
250 ns (F = 0.1 Hz)
Current from A (TIP) or B (RING)
RYOUT1, RYOUT2 current
RYOUT1, RYOUT2 voltage
RYOUT1, RYOUT2 transient
RYE voltage
± 150 mA
75 mA
RYE to +7 V
RYE to +10 V
BGND to VBAT1
C3-C1, D2-D1, E1, B2EN and RINGIN:
-0.4 V to VCC + 0.4 V
Input voltage
Maximum continuous power dissipation, TA = 70° C1:
In 32-pin PLCC package
1.67 W
3.00 W
θJA
In 32-pin QFN package
Thermal Data:
In 32-pin PLCC package
45° C/W
In 32-pin QFN package2
25° C/W
ESD Immunity (Human Body Model)
JESD22 Class 1C compliant
Note:
1. Thermal limiting circuitry on the chip will shut down the circuit at a junction temperature of about 165ºC. Continuous operation above 145ºC
junction temperature may degrade device reliability.
2. The thermal performance of a thermally enhanced package is assured through optimized printed circuit board layout. Specified performance
requires that the exposed thermal pad be soldered to an equally sized exposed copper surface, which, in turn, conducts heat through
multiple vias to a large internal copper plane.
Package Assembly
Green package devices are assembled with enhanced, environmental compatible lead-free, halogen-free, and antimony-free
materials. The leads possess a matte-tin plating which is compatible with conventional board assembly processes or newer lead-
free board assembly processes. The peak soldering temperature should not exceed 245°C during printed circuit board assembly.
Refer to IPC/JEDEC J-Std-020B Table 5-2 for the recommended solder reflow temperature profile.
OPERATING RANGES
Environmental Ranges
Zarlink guarantees the performance of this device over the commercial (0º C to 70º C) temperature range by conducting
electrical characterization and by conducting a production test with single insertion coupled to periodic sampling. These
characterization and test procedures comply with section 4.6.2 of Bellcore GR-357-CORE Component Reliability Assurance
Requirements for Telecommunications Equipment.
6
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
Environmental Ranges
Ambient Temperature
0 to 70° C
Electrical Ranges
VCC
4.75 V to 5.25 V
-4.75 V to VBAT2
VNEG
VBAT1
-40 to -67 V
VBAT2
-19 V to VBAT1
AGND/DGND
0 V
BGND with respect to AGND/DGND
Load resistance on VTX to GND
-100 mV to +100 mV
20 kΩ min
Note:
The Operating Ranges define those limits between which the functionality of the device is guaranteed.
7
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
ELECTRICAL CHARACTERISTICS
Description
Transmission Performance
2-wire return loss
ZVTX, analog output impedance
VVTX, analog output offset voltage
ZRSN, analog input impedance
Test Conditions (See Note 1)
Min
26
Typ
Max
Unit
Note
200 Hz to 3.4 kHz (Test Circuit D)
dB
Ω
1, 4, 6
4
3
1
20
+50
20
–50
mV
Ω
4
Overload level, 2-wire and 4-wire, off hook Active state
2.5
0.88
Vpk
Vrms
2a
2b
Overload level, 2-wire
On hook, RLAC = 600 Ω
THD (Total Harmonic Distortion)
THD, on hook, OHT state
+3 dBm, BAT2 = –24 V
0 dBm, RLAC = 600 Ω,
BAT1 = –67 V
–64
–50
–40
dB
5
Longitudinal Performance (See Test Circuit C)
Longitudinal to metallic L-T, L-4 balance
Longitudinal signal generation 4-L
Longitudinal current per pin (A or B)
Longitudinal impedance at A or B
Idle Channel Noise
200 Hz to 3.4 kHz
200 Hz to 800 Hz, Normal polarity
Active or OHT state
40
40
12
dB
28
25
mArms
Ω/pin
4
4
0 to 100 Hz, TA = +25°C
C-message weighted noise
Psophometric weighted noise
+7
–83
+14
–76
dBrnC
dBmp
Insertion Loss and Four- to Four-Wire Balance Return Signal (See Test Circuits A and B)
Gain accuracy
Gain accuracy
4- to 2-wire
2- to 4-wire and
4- to 4-wire
0 dBm, 1 kHz
0 dBm, 1 kHz
–0.20
0
+0.20
–6.22 –6.02 –5.82
Gain accuracy
Gain accuracy
4- to 2-wire
2- to 4-wire and
4- to 4-wire
OHT state, on hook
OHT state, on hook
–0.35
0
+0.35
3
–6.37 –6.02 –5.77
dB
µs
Gain accuracy over frequency
300 to 3400 Hz
relative to 1 kHz
+3 dBm to –55 dBm
relative to 0 dBm
0 dBm to –37 dBm
+3 dBm to 0 dBm
0 dBm, 1 kHz
–0.10
–0.10
+0.10
+0.10
Gain tracking
3, 4
Gain tracking
OHT state, on hook
Group delay
–0.10
–0.35
+0.10
+0.35
3, 4
3
1, 4, 6
3
8
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
ELECTRICAL CHARACTERISTICS (CONTINUED)
Description
Line Characteristics
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
IL, Loop-current accuracy
IL, Long loops, Active state
IL, Accuracy, Standby state
IL in constant-current region,
B2EN = 0
0.87IL
IL
21.7
IL
1.1IL
RLDC = 600 Ω, RSGL = open
20
20
0.8IL
RLDC = 750 Ω, RSGL = short
1.2IL
VBAT1 – 10 V
IL = --------------------------------------
RL + 400
mA
IL = constant-current region
TA = 25°C
18
27
39
ILLIM
Active, A and B to ground
OHT, A and B to ground
55
55
110
4
IL, Loop current, Open Circuit state
IA, Pin A leakage, Tip Open state
IB, Pin B current, Tip Open state
VA, Standby, ground-start signaling
RL = 0
RL = 0
B to ground
A to –48 V = 7 kΩ,
B to ground = 100 Ω
100
100
µA
34
–5
mA
–7.5
42
4
7
V
VAB, Open Circuit voltage
Power Supply Rejection Ratio (VRIPPLE = 100 mVrms), Active Normal State
VCC
VNEG
VBAT1
VBAT2
50 Hz to 3400 Hz
50 Hz to 3400 Hz
50 Hz to 3400 Hz
50 Hz to 3400 Hz
33
30
30
30
50
40
50
50
dB
5
Power Dissipation
On hook, Open Circuit state
On hook, Standby state
On hook, OHT state
On hook, Active state
Off hook, Standby state
Off hook, OHT state
Off hook, Active state
Supply Currents
ICC, On-hook VCC supply current
VBAT1
VBAT2
VBAT1
VBAT1
VBAT1 or VBAT2
VBAT1
VBAT2
48
55
100
80
9
9
200
220
2000
2000
550
300
350
2800
2200
750
mW
RL = 300 Ω
RL = 300 Ω
RL = 300 Ω
Open Circuit state
Standby state
OHT state
Active state–normal
3.0
3.2
6.2
6.5
4.5
5.5
8.0
9.0
INEG, On-hook VNEG supply current
IBAT, On-hook VBAT supply current
Open Circuit state
Standby state
0.1
0.1
0.7
0.7
0.45
0.6
2.0
2.7
0.2
0.2
1.1
1.1
1.0
1.5
4.0
5.0
mA
OHT state
Active state–normal
Open Circuit state
Standby state
OHT state
Active state–normal
9
Zarlink Semiconductor Inc.
Le79R70
ELECTRICAL CHARACTERISTICS (continued)
Data Sheet
Description
Logic Inputs (C3–C1, D2–D1, E1, and B2EN)
VIH, Input High voltage
VIL, Input Low voltage
IIH, Input High current
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
2.0
V
0.8
40
–75
–400
µA
IIL, Input Low current
Logic Output DET
VOL, Output Low voltage
VOH, Output High voltage
Ring-Trip Detector Input
Ring detect accuracy
IOUT = 0.8 mA, 15 kΩ to VCC
IOUT = –0.1 mA, 15 kΩ to VCC
0.40
+10
V
2.4
–10
%
BAT1 – 1
IRTD = --------------------------- + 24 µA • 335
RRT1
Ring Signal
VAB, Ringing
VAB Ringing offset
Bat1 = –67 V, ringload = 1570 Ω
VRINGIN = 2.5 V
57
2
61
0
180
Vpk
V
—
∆VAB/∆VRINGIN (RINGIN gain)
Ground-Key Detector Thresholds
Ground-key resistive threshold
Ground-key current threshold
Loop Detector
B to ground
B to ground
5
11
10
kΩ
mA
RLTH, Loop-resistance detect threshold
Active, VBAT1
Active, VBAT2
Standby
–20
–20
–12
20
20
12
%
8
4
Relay Driver Output (RELAY1 and 2)
VOL, On voltage (each output)
VOL, On voltage (each output)
IOH, Off leakage (each output)
Zener breakover (each output)
Zener on voltage (each output)
IOL = 30 mA
IOL = 40 mA
VOH = +5 V
IZ = 100 µA
IZ = 30 mA
+0.25
+0.30
+0.4
+0.8
100
V
µA
V
6.6
7.9
11
RELAY DRIVER SCHEMATIC
RYOUT2
RYOUT1
RYE
BGND
BGND
10
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
Notes:
1. Unless otherwise noted, test conditions are BAT1 = –67 V, BAT2 = –24 V, VCC = +5 V, VNEG = –5 V, RL = 600 Ω,
RDC1 = 80 kΩ, RDC2 = 20 kΩ, RD = 75 kΩ, no fuse resistors, CHP = 0.018 µF, CDC = 1.2 µF, D1 = D2 = 1N400x,
two-wire AC input impedance (ZSL) is a 600 Ω resistance synthesized by the programming network shown below.
RSGL = open, RSGH = open, RDCR = 2 kΩ, RRT1 = 430 kΩ, RRT2 = 12 kΩ, CRT = 1.5 µF, RSLEW = 150 kΩ, CSLEW = 0.33 µF.
VTX
RT1 = 150 kΩ
RT2 = 150 kΩ
CT1 = 60 pF
RSN
~
VRX
RRX = 300 kΩ
2. a. Overload level is defined when THD = 1%.
b. Overload level is defined when THD = 1.5%.
3. Balance return signal is the signal generated at VTX by VRX. This specification assumes that the two-wire AC load impedance
matches the programmed impedance.
4. Not tested in production. This parameter is guaranteed by characterization or correlation to other tests.
5. This parameter is tested at 1 kHz in production. Performance at other frequencies is guaranteed by characterization.
6. Group delay can be greatly reduced by using a ZT network such as that shown in Note 1 above. The network reduces the
group delay to less than 2 µs and increases 2WRL. The effect of group delay on line card performance may also be compen-
sated for by synthesizing complex impedance with the QSLAC or DSLAC device.
7. Open Circuit VAB can be modified using RSGH.
8. RD must be greater than 56 kΩ. Refer to Table 2 for typical value of RLTH
.
9. Lower power is achieved by switching into low-battery state in standby. Standby loop current is returned to VBAT1 regardless
of the battery selected.
Table 1. SLIC Decoding
(DET) Output
State
C3 C2 C1
2-Wire Status
Open Circuit
E1 = 1
Ring trip
E1 = 0
Ring trip
Battery Selection
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Ringing
Ring trip
Ring trip
B2EN
2
Active
Loop detector
Loop detector
Loop detector
Loop detector
Loop detector
Loop detector
Ground key
Ground key
Ground key
Ground key
Ground key
Ground key
3
On-hook TX (OHT)
Tip Open
4
B2EN = 1**
VBAT1
5
Standby
6*
7*
Active Polarity Reversal
OHT Polarity Reversal
B2EN
Notes:
* Only –1 performance grade devices support polarity reversal.
** For correct ground-start operation using Tip Open, VBAT1 on-hook battery must be used.
11
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
Table 2. User-Programmable Components
ZT = 500(Z2WIN – 2RF)
ZT is connected between the VTX and RSN pins. The fuse resistors are
RF, and Z2WIN is the desired 2-wire AC input impedance. When com-
puting ZT, the internal current amplifier pole and any external stray ca-
pacitance between VTX and RSN must be taken into account.
ZRX is connected from VRX to RSN. ZT is defined above, and G42L is the
desired receive gain.
ZL
1000 • ZT
----------- --------------------------------------------------
ZRX
=
•
G42L ZT + 500(ZL + 2RF)
RDC1, RDC2, and CDC form the network connected to the RDC pin.
2500
--------------
ILOOP
RDC1 + RDC2
=
I
LOOP is the desired loop current in the constant-current region.
R
DCR1, RDCR2, and CDCR form the network connected to the RDCR pin.
3000
RDCR1 + RDCR2 = ---------------------
Iringlim
See Applications Circuit for these components.
RDC1 + RDC2
---------------------------------
CDC = 19 ms •
R
DC1RDC2
C
DCR sets the ringing time constant, which can be between 15 µs and
RDCR1 + RDCR2
----------------------------------------
• 150 µs
150 µs.
CDCR
=
R
DCR1RDCR2
RD is the resistor connected from the RD pin to GND and RLTH is the
loop-resistance threshold between on-hook and off-hook detection. RD
should be greater than 56 kΩ to guarantee detection will occur in the
Standby state. Choose the value of RD for high battery state; then use
the equation for RLTH to find where the threshold is for low battery.
RD = RLTH • 12.67 for high battery state
Loop-Threshold Detect Equations
This is the same equation as for RD in the preceding equation, except
RD
RLTH = ------------ for high battery
solved for RLTH
.
12.67
For low battery, the detect threshold is slightly higher, which will avoid
oscillating between states.
RD
RLTH = ------------ for low battery
11.37
RLTH standby < RLTH active VBAT1 < RLTH active VBAT2, which will guar-
antee no unstable states under all operating conditions. This equation
will show at what resistance the standby threshold will be; it is actually
a current threshold rather than a resistance threshold, which is shown
by the Vbat dependency.
VBAT1 –10
-----------------------------
915
RLTH
=
• RD – 400 – 2RF
12
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
DC FEED CHARACTERISTICS
50
5) VAPPH
High Battery Anti-Sat
4) VASH
40
VAB
(Volts)
30
20
1) Constant-Current Region
2) VASL
3) VAPPL
Low Battery Anti-Sat
10
0
30
IL (mA)
Figure 1. Typical VAB vs. IL DC Feed Characteristics
RDC = RDC1 + RDC2 = 20 kΩ + 80 kΩ = 100 kΩ
(VBAT1= –67 V, VBAT2 = –24 V)
Notes:
2500
------------
RDC
1. Constant-current region: VAB = ILRL
=
RL; where RL= RL + 2RF
1000 • (104 • 103 + RSGL
)
------------------------------------------------------------------
; where RSGL = resistor to GND, B2EN = logic Low.
2. Low battery
VASL
=
=
6720 • 103 + (80 • RSGL
)
1000 • (RSGL – 56 • 103)
--------------------------------------------------------------
Anti-sat region:
3.
VASL
; where RSGL = resistor to VCC, B2EN = logic Low.
RSGL to VCC must be greater than 100 kΩ.
6720 • 103 + (80 • RSGL
)
VAPPL = 4.17 + VASL
VAPPL
ILOOPL = ------------------------------------------------------------------------------
(RDC1 + RDC2
)
-------------------------------------- + 2 R F + RLOOP
600
4. High battery
Anti-sat region:
VASH = VASHH + VASL
1000 • (70 • 103 + RSGH
)
----------------------------------------------------------------------
VASHH
=
=
; where RSGH = resistor to GND, B2EN = logic High.
; where RSGH = resistor to VCC, B2EN = logic High.
1934 • 103 + (31.75 • RSGH
)
1000 • (RSGH + 2.75 • 103)
----------------------------------------------------------------------
VASHH
1934 • 103 + (31.75 • RSGH
)
RSGH to VCC must be greater than 100 kΩ.
VAPPH = 4.17 + VASH
5.
VAPPH
ILOOPH = ------------------------------------------------------------------------------
(RDC1 + RDC2
)
-------------------------------------- + 2 R F + RLOOP
600
13
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
RING-TRIP COMPONENTS
RRT2 = 12 kΩ
CRT = 1.5 µF
VBAT1
-----------------------------------------------------------------------------------------------------------------------------------------
RRT1 = 320 • CF •
• (RLRT + 150 + 2RF)
VBAT1 – 5 – (24 µA • 320 • CF • (RLRT + 150 + 2RF))
where RLRT = Loop-detection threshold resistance for ring trip and CF = Crest factor of ringing signal (≈ 1.25)
RSLEW, CSLEW
Ring waveform rise time ≈ 0.214 • (RSLEW • CSLEW) ≈ tr.
For a 1.25 crest factor @ 20 Hz, tr ≈ 10 mS.
∴ (RSLEW = 150 kΩ, CSLEW = 0.33 µF.)
CSLEW should be changed if a different crest factor is desired.
Ringing Reference
(Input to RSLEW
)
0
B(RING)
A(TIP)
Battery
This is the best time for
switching between RINGING
and other states for minimizing
detect switching transients.
Figure 2. Ringing Waveforms
A
a
b
RSN
RL
IL
SLIC
RDC2
CDC
RDC1
B
RDC
Feed current programmed by RDC1 and RDC2
Figure 3. Feed Programming
14
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
TEST CIRCUITS
A(TIP)
VTX
RL
2
SLIC
VAB
VL
RT
RRX
AGND
RL
2
B(RING) RSN
I
L2-4 = 20 log (VTX / VAB)
A. Two- to Four-Wire Insertion Loss
A(TIP)
VTX
SLIC
VAB
RL
RT
RRX
AGND
B(RING)
RSN
VRX
IL4-2 = 20 log (VAB / VRX
)
BRS = 20 log (VTX / VRX
)
B. Four- to Two-Wire Insertion Loss and Four- to Four-Wire Balance Return Signal
1
ωC
A(TIP)
SLIC
AGND
VTX
<< RL
RL
2
S1
C
RT
S2
VL
VAB
RL
2
VL
RRX
B(RING) RSN
VRX
S2 Open, S1 Closed
S2 Closed, S1 Open
4-L Long. Sig. Gen. = 20 log (VL / VRX
L-T Long. Bal. = 20 log (VAB / VL)
L-4 Long. Bal. = 20 log (VTX / VL)
)
C. Longitudinal Balance
15
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
TEST CIRCUITS (continued)
ZD
A(TIP)
VTX
RT1
R
SLIC
VS
VM
AGND
R
ZIN
CT1
RT2
B(RING)
RSN
RRX
ZD: The desired impedance;
e.g., the characteristic impedance of the line
Return loss = –20 log (2 VM / VS)
D. Two-Wire Return Loss Test Circuit
VCC
6.2 kΩ
A(TIP)
A(TIP)
DET
B(RING)
15 pF
RL = 600 Ω
RG
E1
B(RING)
E. Loop-Detector Switching
F. Ground-Key Switching
RF1
C1
L1
200 Ω
50 Ω
A
CAX
33 nF
RF2
50 Ω
200 Ω
B
HF
GEN
CBX
33 nF
VTX
C2
L2
50 Ω
SLIC
under test
1.5 Vrms
80% Amplitude
Modulated
100 kHz to 30 MHz
G. RFI Test Circuit
16
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
TEST CIRCUITS (continued)
+5 V
–5 V
VCC
RTRIP1
RTRIP2
VNEG
RRT2
RRT1
CRT
1.5 µF
12 kΩ
RD
75 kΩ
RSGH
open
430 kΩ
RD
RSGL
open
CAX
2.2 nF
RSGH
RSGL
A(TIP)
HPA
A(TIP)
VTX
VTX
RT
300 kΩ
RRX
300 kΩ
CHP
18 nF
HPB
VRX
RSN
B(RING)
B(RING)
RDC1
RDC2
CBX
80 kΩ
2.2 nF
20 kΩ
RDC
RDCR
RYOUT1
RDCR
2.0 kΩ
RYOUT2
RYE
CDC
1.2 µF
B2EN
C1
D1
C2
C3
D1
D2
E1
DET
BAT1
VBAT1
VBAT2
0.1 µF
D2
BAT2
0.1 µF
RSLEW
100 kΩ
BGND
RINGIN
See Note.
CSLEW
0.33 µF
AGND/
DGND
BATTERY
GROUND
ANALOG
GROUND
Note:
The input should be 50% duty cycle CMOS-compatible input.
DIGITAL
GROUND
H. Le79R70 Test Circuit
17
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
APPLICATION CIRCUIT
+5 V
–5 V
VCC
RTRIP1
RTRIP2
VNEG
RRT2
RRT1
CRT
12 kΩ
1.5 µF
RD
66 kΩ
RSGH
515 kΩ
open
RD
RSGL
open
CAX = 2.2 nF
RSGH
RSGL
VTX
RFA = 50 Ω
TIP
A(TIP)
HPA
VTX
K1
G
K1
RT1
125 kΩ
125 kΩ
RRX
250 kΩ
Bat1
A
A
TISP
CHP
18 nF
CT
RT2
61089
VRX
HPB
RSN
K2
K2
RDC1
50 kΩ
RDC2
50 kΩ
B(RING)
RING
RFB = 50 Ω
CBX = 2.2 nF
RDC
RDCR2
15 kΩ
CDC
RDCR1
820 nF
RYOUT1
RYOUT2
RYE
RDCR
CDCR
15 kΩ
10 nF
B2EN
C1
D1
C2
C3
D1
D2
E1
DET
BAT1
BAT2
VBAT1
VBAT2
0.1 µF
D2
0.1 µF
RSLEW
150 kΩ
BGND
See Note.
RINGIN
CSLEW
0.33 µF
BATTERY
GROUND
AGND/
DGND
ANALOG
GROUND
Assumptions:
1. 1.25 CF
4. 5.2 kΩ High Battery Loop Threshold
5. 925 Ω Ringing Loop Threshold
6. 600 Ω Two-wire Impedance,
600 Ω ZL
7. G42L = 1
8. –67 V Vbat1, –24 V Vbat2
2. 25 mA ILOOP
3. 100 mA Ringing Current Limit
DIGITAL
Note:
GROUND
The input should be 50% duty cycle CMOS-compatible input.
I. Application Circuit
18
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
PHYSICAL DIMENSIONS
32-Pin PLCC
NOTES:
1
2
3
Dimensioning and tolerancing conform to ASME Y14,5M-1994.
32-Pin PLCC
JEDEC # MS-016
To be measured at seating plan - C - contact point.
Min
Nom
--
Max
0.140
0.095
0.495
0.453
Symbol
A
0.125
0.075
0.485
0.447
Dimensions “D1” and “E1” do not include mold protrusion.
Allowable mold protrusion is 0.010 inch per side. Dimensions
“D” and “E” include mold mismatch and determined at the
parting line; that is “D1” and “E1” are measured at the extreme
material condition at the upper or lower parting line.
A1
D
0.090
0.490
0.450
0.205 REF
0.590
0.550
0.255 REF
--
D1
D2
E
0.585
0.547
0.595
0.553
4
5
Exact shape of this feature is optional.
E1
E2
Ԧ
Details of pin 1 identifier are optional but must be located
within the zone indicated.
0 deg
10 deg
6
7
8
Sum of DAM bar protrusions to be 0.007 max per lead.
Controlling dimension : Inch.
Reference document : JEDEC MS-016
32-Pin PLCC
Note:
Packages may have mold tooling markings on the surface. These markings have no impact on the form, fit or function of the
device. Markings will vary with the mold tool used in manufacturing.
19
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
32-Pin QFN
NOTES:
1. Dimensioning and tolerancing conform to ASME Y14.5M-1994.
32 LEAD QFN
Nom
Symbol
Min
Max
2. All dimensions are in millimeters.
3. N is the total number of terminals.
is in degrees.
A
A2
b
0.80
0.90
1.00
0.57 REF
0.23
4.
The Terminal #1 identifier and terminal numbering convention
T
0.18
5.70
5.70
0.43
0.00
0.28
5.90
5.90
0.63
0.05
shall conform to JEP 95-1 and SSP-012. Details of the erminal #1
D
8.00 BSC
5.80
identifier are optional, but must be located within the zone
indicated. The Terminal #1 identifier may be either a mold or
marked feature.
D2
E
8.00 BSC
5.80
E2
e
5. Coplanarity applies to the exposed pad as well as the terminals.
6. Reference Document: JEDEC MO-220.
7. Lead width deviates from the JEDEC MO-220 standard.
0.80 BSC
0.53
L
N
32
A1
A3
aaa
bbb
ccc
0.02
0.20 REF
0.20
0.10
0.10
32-Pin QFN
Note:
Packages may have mold tooling markings on the surface. These markings have no impact on the form, fit or function of the
device. Markings will vary with the mold tool used in manufacturing.
20
Zarlink Semiconductor Inc.
Le79R70
Data Sheet
REVISION HISTORY
Revision A to B
•
Minor changes were made to the data sheet style and format to conform to Zarlink standards.
Revision B to C
•
The 28-pin SOIC information and package was added to the Ordering Information and the Connection Dia-
grams sections.
•
•
The physical dimensions (PL032 and SOW28) were added to the Physical Dimensions section.
Updated the Pin Description table to correct inconsistencies.
Revision C to D
•
Changed Ring-Trip Components equation from:
VBAT1
-----------------------------------------------------------------------------------------------------------------------------------------
RRT1 = 300 • CF •
• (RLRT + 150 + 2RF)
Vbat – 3.5 – (15 µA • 300 • CF • (RLRT + 150 + 2RF))
To:
VBAT1
-------------------------------------------------------------------------------------------------------------------------------------
RRT1 = 320 • CF •
• (RLRT + 150 + 2RF)
Vbat – 5 – (24 µA • 320 • CF • (RLRT + 150 + 2RF))
Revision D to E
•
In “Ordering Information” section, added description for wafer foundry facility optional character.
Revision E to F
•
•
•
•
•
•
Updated device name from “Am79R70” to “Le79R70” throughout document.
Added QFN package to “Connection Diagram,” “Absolute Maximum Ratings,” and “Physical Dimensions.”
Removed reference to PLCC package type in “General Description.”
Ordering Information: Temperature statement updated to standard.
Absolute Maximum Ratings: Notes updated to standard.
Operating Ranges: Temperature statement updated to standard.
Revision F to G1
•
•
Added green package OPNs to Ordering Information, on page 1
Added Package Assembly, on page 6
Revision G1 to H1
•
•
Added "Packing" column and Note 5 to Ordering Information, on page 1
Updated 32QFN drawing in Physical Dimensions, on page 19
Revision H1 to I1
•
•
•
Added green package OPNs and removed OPN for SOIC package in Ordering Information, on page 1
Removed SOIC drawing in Physical Dimensions, on page 19
Added note to Physical Dimensions, on page 19
Revision I1 to J1
•
Removed the following OPNs from Ordering Information, on page 1: Le79R70JC, Le79R70-1JC, Le79R70QC, Le79R70-
1QC.
•
Changed IL Loop-Current Accuracy from 0.9 to 0.871 in Electrical Characteristics.
Revision J1 to J2
•
•
Enhanced format of package drawings in Physical Dimensions, on page 19
Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007
21
Zarlink Semiconductor Inc.
For more information about all Zarlink products
visit our Web Site at
www.zarlink.com
Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable.
However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such
information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or
use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual
property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in
certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink.
This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part
of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other
information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the
capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute
any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and
suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does
not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in
significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request.
Purchase of Zarlink’s I2C components conveys a license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system
conforms to the I2C Standard Specification as defined by Philips.
Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are
trademarks of Zarlink Semiconductor Inc.
TECHNICAL DOCUMENTATION - NOT FOR RESALE
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