SP488EEP [SIPEX]
Enhanced Quad RS-485/RS-422 Line Receivers; 增强型四RS - 485 / RS - 422线路接收器
| 型号： | SP488EEP |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Enhanced Quad RS-485/RS-422 Line Receivers |
| 文件： | 总10页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP488E and SP489E
Enhanced Quad RS-485/RS-422 Line Receivers
■ RS-485 or RS-422 Applications
■ Quad Differential Line Receivers
■ Receiver Output Disable
■ –7V to +12V Common Mode Input Range
■ 1mA Supply Current
■ Single +5V Supply Operation
■ Superior Drop-in Replacement for
SN75173, SN75175, LTC488 and LTC489
■ Improved ESD Specifications:
+15kV Human Body Model
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
DESCRIPTION…
The SP488E and SP489E are low-power quad differential line receivers that meet the
specifications of RS-485 and RS-422 serial protocols with enhanced ESD performance. The
ESD tolerance has been improved on these devices to over +15kV for both Human Body
Model and IEC1000-4-2 Air Discharge Method. These devices are superior drop-in replace-
ments to Sipex's SP488 and SP489 devices as well as popular industry standards. As with
the original versions, the SP488E features a common receiver enable control and the
SP489E provides independent receiver enable controls for each pair of receivers. Both
feature wide common-mode input ranges. The receivers have a fail-safe features which
forces a logic "1" output when receiver inputs are left floating. Both are available in 16-pin
plastic DIP and SOIC packages.
RI1B
RI1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI1B
RI1A
RO1
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI4B
RI4A
RO4
EN
SP489E
4
SP488E
4
RI4B
RI4A
RO4
1
1
RO1
EN1/EN2
RO2
EN3/EN4
RO3
RO2
RI2A
RI2B
GND
2
RI2A
2
RO3
RI3A
RI3B
3
RI2B
RI3A
RI3B
3
GND
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional
operation of the device at these or any other above
those indicated in the operation sections of the
specifications below is not implied. Exposure to
absolute maximum rating conditions for extended
periods of time may affect reliability.
VCC .................................................................. +7V
Input Voltages
Logic....................................–0.5V to (VCC +0.5V)
Receiver ..................................................... +14V
Receiver Output Voltage........ –0.5V to (VCC +0.5V)
Input Currents
Logic........................................................ +25mA
Storage Temperature ................. –65°C to +150°C
Power Dissipation
Plastic DIP .............................................. 375mW
(derate 7mW/°C above +70°C)
Small Outline .......................................... 375mW
(derate 7mW/°C above +70°C)
Lead Temperature (soldering, 10 sec) ......... 300°C
SPECIFICATIONS
VCC = 5V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNIT
CONDITIONS
DC CHARACTERISTICS
Digital Inputs
Voltage
VIL
EN, EN, EN1/EN2, EN3/EN4
0.8
+2
Volts
Volts
µA
VIH
2.0
Input Current
0V ≤ VIN ≤ VCC
RECEIVER INPUTS
Input Resistance
Differential Input Threshold
Input Current (A, B)
12
–0.2
kOhm
Volts
–7V ≤ VCM ≤ 12V
–7V ≤ VCM ≤ 12V
VCC = 0V or 5.25V; IIN2
VIN = +12V
+0.2
+1.0
–0.8
mA
mA
VIN = –7V
Maximum Data Rate
10
Mbps
RECEIVER OUTPUTS
Output Voltage
VOH
VOL
3.5
V
V
µA
IO = –4mA; VID = +0.2V
IO = +4mA; VID = –0.2V
0.4V ≤ VO ≤ 2.4V,
0.4
+1
High Impedance Output Current
EN = O, EN = 1,
EN1 / EN2 = EN3 / EN4 = O
POWER REQUIREMENTS
Supply Voltage
Supply Current
4.75
5.00
1
5.25
5
Volts
mA
No load
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
–C
–E
0
–40
–65
+70
+85
+150
°C
°C
°C
Storage Temperature
Package
–_P
16–pin Plastic DIP
16–pin SOIC
–_T
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
2
100pF
EN
S1
S2
1kΩ
A
VCC
DRIVER
RCVR
ROn
CL
CL
DI
54Ω
1kΩ
B
100pF
EN
1/4 SP486E
1/4 SP488E
Figure 2. Enable/Disable Timing Test Circuit
Figure 1. Timing Test Circuit
SP488 PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 6 — RI2A — Receiver 2 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
Pin 9 — RI3B — Receiver 3 input B.
Pin 10 — RI3A — Receiver 3 input A.
Pin 2 — RI1A — Receiver 1 input A.
Pin 3 — RO1 — Receiver 1 Output — If
Receiver 1 output is enabled, if RI1A> RI B by
200mV, Receiver output is high. If Rece1iver 1
outputisenabled, andifRI A<RI1B by200mV,
Receiver 1 output is low.1
Pin 4 — EN — Receiver Output Enable. Please
refer to SP488E Truth Table (1).
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI A > RI3B by
200mV, Receiver 3 output is high.3If Receiver 3
output is enabled, and if RI3A < RI3B by 200mV,
Receiver 3 output is low.
Pin 5 — RO2 — Receiver 2 Output —
If Receiver 2 output is enabled, if RI2A > RI B
by 200mV, Receiver 2 output is high. 2If
Receiver 2 output is enabled, and if RI2A < RI2B
by 200mV, Receiver 2 output is low.
Pin12—EN—ReceiverOutputEnable. Please
refer to SP488E Truth Table (1).
PINOUT
RI1B
RI1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI1B
RI1A
RO1
EN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
RI4B
RI4A
RO4
EN
SP489E
4
SP488E
4
RI4B
RI4A
RO4
1
1
RO1
EN1/EN2
RO2
RO2
RI2A
RI2B
GND
EN3/EN4
RO3
2
2
RO3
RI3A
RI3B
RI2A
3
3
RI2B
RI3A
RI3B
GND
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
3
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI A > RI4B by
200mV, Receiver 4 output is high.4If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
Pin 9 — RI3B — Receiver 3 input B.
Pin 10 — RI3A — Receiver 3 input A.
Pin 11 — RO3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI A > RI3B by
200mV, Receiver 3 output is high.3If Receiver 3
output is enabled, and if RI3A < RI3B by
200mV, Receiver 3 output is low.
Pin 14 — RI4A — Receiver 4 input A.
Pin 15 — RI4B — Receiver 4 input B.
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
5.25V.
≤
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP489E Truth Table (2).
Pin 13 — RO4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI A > RI4B by
200mV, Receiver 4 output is high.4If Receiver 4
output is enabled, and if RI4A < RI4B by
200mV, Receiver 4 output is low.
SP489E PINOUT
Pin 1 — RI1B — Receiver 1 input B.
Pin 2 — RI1A — Receiver 1 input A.
Pin 3 — RO1 —
Receiver 1 Output — If
Pin 14 — RI4A — Receiver 4 input A.
Pin 15 — RI4B — Receiver 4 input B.
Receiver 1 output is enabled, if RI1A > RI B by
200mV, Receiver output is high. If Rece1iver 1
outputisenabled, andifRI A<RI1B by200mV,
Receiver 1 output is low.1
Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC
≤
5.25V.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP489E Truth Table (2).
FEATURES…
The SP488E and SP489E are low–power quad
differential line receivers meeting RS-485 and
RS-422 standards. The SP488E features active
high and active low common receiver enable
controls; the SP489E provides independent,
active high receiver enable controls for each
pair of receivers. Both feature tri–state outputs
and a -7V to +12V common–mode input range
permitting a +7V ground difference between
devices on the communications bus. The
SP488E/489E are equipped with a fail–safe
feature which forces a logic high at the receiver
output when the input is left floating. Data rates
up to 10Mbps are supported. Both are available
in 16-pin plastic DIP and SOIC packages.
Pin 5 — RO2 — Receiver 2 Output — If
Receiver 2 output is enabled, if RI A > RI2B by
200mV, Receiver 2 output is high.2If Receiver 2
output is enabled, and if RI2A < RI2B by
200mV, Receiver 2 output is low.
Pin 6 — RI2A — Receiver 2 input A.
Pin 7 — RI2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
DIFFERENTIAL
A – B
ENABLES
EN
OUTPUT
RO
EN
DIFFERENTIAL
A – B
ENABLES
EN /EN or EN /EN
4
OUTPUT
RO
V
ID ≥ 0.2V
H
X
X
L
H
H
1
2
3
V
≥ 0.2V
H
H
H
L
H
X
ID
–0.2V < VID < +0.2V
H
X
X
L
X
X
–0.2V < V < +0.2V
ID
V
ID ≤ 0.2V
H
X
X
L
L
L
V
≤ 0.2V
L
ID
X
Hi–Z
X
L
H
Hi–Z
Table 1. SP488E Truth Table
Table 2. SP489E Truth Table
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
4
AC PARAMETERS
VCC = 5V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNIT
CONDITIONS
PROPAGATION DELAY
Receiver Input to Output
CL = 15pF; Figure 1, 3
Low to HIGH (tPLH
High to LOW (tPHL
Differential Receiver Skew (tSKD
)
)
45
45
5
60
60
ns
ns
ns
)
tSKD = tPHL - tPLH
RECEIVER ENABLE
To Output HIGH
30
35
60
60
ns
ns
CL = 15pF; Figures 2 and 4
(S2 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
To Output LOW
RECEIVER DISABLE
From Output LOW
35
30
60
60
ns
ns
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
From Output HIGH
F = 1MHZ: tr < 10ns: tf < 10ns
0V
+VOD
Input A–B
0V
–VOD
tPHL
tPLH
VOH
VOL
RO
1.5V
1.5V
Figure 3. Receiver Propagation Delays
F = 1MHZ: tr < 10ns: tf < 10ns
1.5V
3V
EN
1.5V
0V
tZL
tLZ
5V
RO
1.5V
0.5V
0.5V
VOL
Output normally low
tZH
tHZ
Output normally high
1.5V
VOH
0V
RO
Figure 4. Receiver Enable/Disable Timing
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
5
R
R
S
S
R
R
C
C
SW2
SW2
SW1
SW1
Device
Under
Test
DC Power
Source
C
C
S
S
Figure 5. ESD Test Circuit for Human Body Model
Contact-Discharge Module
Contact-Discharge Module
R
R
R
R
S
S
R
R
V
V
C
C
SW2
SW2
SW1
SW1
Device
Under
Test
DC Power
Source
C
C
S
S
R
R
and R add up to 330Ω for IEC1000-4-2.
and R add up to 330Ω for IEC1000-4-2.
S
S
V
V
Figure 6. ESD Test Circuit for IEC1000-4-2
ESD TOLERANCE
The SP488E and SP489E devices incorporate
ruggedized ESD cells on all driver output and
receiver input pins. The ESD structure is
improved over our previous family for more
rugged applications and environments sensitive
to electro-static discharges and associated
transients. The improved ESD tolerance is at
least +15kV without damage nor latch-up.
The Human Body Model has been the generally
acceptedESDtestingmethodforsemiconductors.
This method is also specified in MIL-STD-883,
Method 3015.7 for ESD testing. The premise of
this ESD test is to simulate the human body’s
potential to store electro-static energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model as
showninFigure5. ThismethodwilltesttheIC’s
capability to withstand an ESD transient during
normal handling such as in manufacturing areas
where the ICs tend to be handled frequently.
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
The IEC-1000-4-2, formerly IEC801-2, is
generallyusedfortestingESDonequipmentand
systems. For system manufacturers, they must
guarantee a certain amount of ESD protection
since the system itself is exposed to the outside
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
6
environment and human presence. The premise
with IEC1000-4-2 is that the system is required
to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
equipmentthatareaccessibletopersonnelduring
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 6. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
potential to the system and humidity will tend to
change the discharge current. For example, the
rise time of the discharge current varies with the
approach speed.
The Contact Discharge Method applies the ESD
current directly to the EUT. This method was
devised to reduce the unpredictability of the
ESD arc. The discharge current rise time is
constant since the energy is directly transferred
without the air-gap arc. In situations such as
handheldsystems,theESDchargecanbedirectly
dischargedtotheequipmentfromapersonalready
holdingtheequipment. Thecurrentistransferred
ontothekeypadortheserialportoftheequipment
directly andthentravelsthroughthePCBandfinally
to the IC.
30A
15A
0A
The circuit model in Figures 5 and 6 represent
the typical ESD testing circuit used for all three
methods. TheCS isinitiallychargedwiththeDC
power supply when the first switch (SW1) is on.
Now that the capacitor is charged, the second
switch(SW2)isonwhileSW1switchesoff. The
voltage stored in the capacitor is then applied
throughRS, thecurrentlimitingresistor, ontothe
device under test (DUT). In ESD tests, the SW2
switch is pulsed so that the device under test
receives a duration of voltage.
t=0ns
t=30ns
t ➙
Figure 7. ESD Test Waveform for IEC1000-4-2
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
throughair. Thissimulatesanelectricallycharged
person ready to connect a cable onto the rear of
the system only to find an unpleasant zap just
before the person touches the back panel. The
high energy potential on the person discharges
through an arcing path to the rear panel of the
system before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage. Variables with an air discharge such as
approach speed of the object carrying the ESD
Forthe HumanBodyModel, the current limiting
resistor (RS) and the source capacitor (CS) are
1.5kWan100pF,respectively. ForIEC-1000-4-2,
the current limiting resistor (RS) and the source
capacitor (CS) are 330W an 150pF, respectively.
The higher C value and lower RS value in the
IEC1000-4-2Smodel are more stringent than the
HumanBodyModel. Thelargerstoragecapacitor
injects a higher voltage to the test point when
SW2 is switched on. The lower current limiting
resistor increases the current charge onto the test
point.
DEVICE PIN
TESTED
HUMAN BODY
MODEL
IEC1000-4-2
Air Discharge Direct Contact
Level
Driver Outputs
Receiver Inputs
+15kV
+15kV
+15kV
+15kV
+8kV
+8kV
4
4
Table 3. Transceiver ESD Tolerance Levels
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
7
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
Ø
L
B1
B
e
= 0.300 BSC
(7.620 BSC)
e = 0.100 BSC
(2.540 BSC)
A
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
0.115/0.195
(2.921/4.953)
A2
0.014/0.022
(0.356/0.559)
B
0.045/0.070
B1
C
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.780/0.800
(19.812/20.320)
D
0.300/0.325
(7.620/8.255)
E
0.240/0.280
E1
L
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
Ø
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
8
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(WIDE)
E
H
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
16–PIN
A
A1
B
D
E
0.093/0.104
(2.352/2.649)
0.004/0.012
(0.102/0.300)
0.013/0.020
(0.330/0.508)
0.398/0.413
(10.10/10.49)
0.291/0.299
(7.402/7.600)
e
0.050 BSC
(1.270 BSC)
H
L
0.394/0.419
(10.00/10.64)
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
9
ORDERING INFORMATION
Quad RS485 Receivers:
Model ........................ Enable/Disable ...................................... Temperature Range........................ Package
SP488ECP ............... Common; active Low and Active High .. 0°C to +70°C ....................16–pin Plastic DIP
SP488ECT................ Common; active Low and Active High .. 0°C to +70°C ............................. 16–pin SOIC
SP488EEP................ Common; active Low and Active High .. –40°C to +85°C ................16–pin Plastic DIP
SP488EET ................ Common; active Low and Active High .. –40°C to +85°C ......................... 16–pin SOIC
SP489ECP ............... One per driver pair; active High ............ 0°C to +70°C ....................16–pin Plastic DIP
SP489ECT................ One per driver pair; active High ............ 0°C to +70°C ............................. 16–pin SOIC
SP489EEP................ One per driver pair; active High ............ –40°C to +85°C ................16–pin Plastic DIP
SP489EET ................ One per driver pair; active High ............ –40°C to +85°C ......................... 16–pin SOIC
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Co rp o ra tio n
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP488E/489EDS/07
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
© Copyright 2000 Sipex Corporation
10
相关型号：
©2020 ICPDF网 联系我们和版权申明