MSA4709A [OKI]
Subscriber Line Interface Circuit; 用户线接口电路
| 型号： | MSA4709A |
| 厂家： | 
OKI ELECTRONIC COMPONETS |
| 描述： | Subscriber Line Interface Circuit |
| 文件： | 总11页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
E2A0032-16-X0
This version: Jan. 1998
Previous version: Nov. 1996
¡ Semiconductor
MSA4709A
Subscriber Line Interface Circuit
GENERAL DESCRIPTION
TheMSA4709AisdesignedtoprovideBSHfunctionsandtomeetPABXtransmissionperformance
requirements.
This device provides two-wire to four-wire conversion function (Hybrid).
FEATURES
• B (Battery feed), S (Supervision), and H (Hybrid) functions integrated on chip.
• Design to meet Central Office and PABX quality transmission requirements.
• All transmission performance parameters can be externally programmable.
• Free from parasitic SCR's using dielectric isolation technology.
• Size and weight reduction over conventional approaches.
• Supply voltage selectable (V = –24 V/–48 V).
BB
• 1 channel built-in relay driver.
• Package:
30-pin plastic Shrink DIP (SDIP30-P-400-1.78) (Product name: MSA4709ASS)
1/11
CDP
CB
IL
SCN
SEL
RG RB
G
PE
TIP Current
DET
TIP Current
Drive Amp.
Loop & Fault
DET
RING TRIP
PB
B
ZX
TIP
ZX
Zt
4WS
4WR
Zb
BN
Over Voltage
Protection
Interface
Circuit
HYB
ZR
ZFR
A
4WR
RING
ZR
NB
NE
Ring Current
DET
Ring Current
Drive Amp.
VBS
Relay Driver
RSI
BF
VBB
RSO
CN
RI
CDC
VCC
VEE
RY
VBB
or
VEE
¡ Semiconductor
MSA4709A
PIN CONFIGURATION (TOP VIEW)
VBB
A
1
2
3
4
5
6
7
8
9
30 NC
29 B
NE
28 PE
27 PB
26 G
NB
RSO
CN
25 CB
24 ZX
23 VCC
22 RI
RY
CDC
RSI
RB 10
RG 11
VEE 12
4WR 13
BN 14
21 BF
20 VBS
19 IL
18 CDP
17 SEL
16 SCN
ZR 15
30-Pin Plastic Shrink DIP
Note:
NC: No connect pin
3/11
¡ Semiconductor
MSA4709A
PIN DESCRIPTION
Pin No.
Name
Description
Battery supply, –48 V or –24 V input.
1
VBB
The Ring voltage sensing input. This input is high impedance (apr. 37 kW), and is
2
3
A
connected to the built-in over voltage protection circuit.
The Ring current sensing input is connected to the emitter of NPN Darlington transistor
and the power resistor REA.
NE
4
5
6
7
NB
RSO
CN
The base drive output for the NPN Darlington transistor.
Relay driver current sink terminal.
Battery noise rejection capacitor input. This capacitor value is 1 mF (60V).
AC performance adjusting resistor RY input.
RY
AC high impedance providing capacitor Cdc input and constant current feed at the short
line adjusting zener diode input. This capacitor value is 1 mF (15V).
8
CDC
9
RSI
RB
Relay driver current source terminal.
Ring-Trip filtering capacitor input (RING).
Ring-Trip filtering capacitor input (TIP).
–5 V input.
10
11
12
RG
VEE
Receive input and is connected to the negative input of the built-in buffer operational
amplifier.
13
4WR
14
15
BN
ZR
Balancing network drive output.
Receive gain adjust and frequency compensation input.
Output of both the fault current detector and loop current detector. This output is open-
collector with a built-in pull-up resistor. (apr. 10 kW).
Condition
• ON-Hook
SEL = "H" SEL = "L"
H
L
H
L
L
L
H
H
H
H
H
L
16
SCN
• OFF-Hook
• Dial pulse: break
• Dial pulse: make
• RING TRIP
• Ground/Battery fault
4/11
¡ Semiconductor
MSA4709A
Pin No.
Name
Description
SCN output information select control input. At SEL = "L", SCN Indicates only ground/
battery fault condition.
17
SEL
18
19
CDP
IL
Dial pulse shaping capacitor input.
Tip to Ring constant loop current determination resistor input.
Supply voltage selection terminal.
20
21
VBS
V
BS = VCC (–24 V), VBS = G (–48 V).
Battery-feed mode control input. A logic level "H" switches off both the Ring and Tip
current drive amp. and presents a high impedance to the line. (apr. 80 kW).
BF
22
23
RI
Relay driver control input. RI = "H" is Driver "ON"
+5 V input
VCC
2 wire terminating impedance compornent Zx input. This pin has a low input
impedance.
24
25
ZX
CB
Compensation capacitor input.
This capacitor value is 4700 pF(35V).
26
27
G
Ground input.
PB
The base drive output for the PNP Darlington power transistor.
The Tip current sensing input is connected to the emitter of the PNP Darlington power
transister and the power resistor REB.
28
PE
The Tip voltage sensing input. This input is high impedance (apr. 37 kW) and is
29
30
B
connected to the built-in over voltage protection circuit.
NC
No connection
5/11
¡ Semiconductor
MSA4709A
ABSOLUTE MAXIMUM RATINGS
(Ta = 25°C)
Parameter
Symbol
Condition
VBS = G
VBS = VCC
—
Rating
Unit
–53.0 to +0.3
–30.0 to +0.3
–0.3 to +7.0
–7.0 to +0.3
–0.3 to VCC + 0.3
–30
VBB
Power Supply Voltage
V
VCC
VEE
VIN
—
Digital Input Voltage
Relay Driver Current
Operating Temperature
Storage Temperature
—
V
IRD
VRI = H
—
mA
°C
°C
Top
0 to 80
TSTG
—
–55 to 150
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Condition
VBS = G
VBS = VCC
—
Min.
–53
–30
+4.75
–5.25
0
Typ. Max. Unit
–48
–24
+5
–43
–21.6
+5.25
–4.75
2000
600
VBB
Power Supply Voltage
V
VCC
VEE
—
–5
VBB = –48 V
VBB = –24 V
—
—
W
RL
Ta
Loop Resistance
0
—
Operating Ambient Temperature
0
—
70
°C
6/11
¡ Semiconductor
MSA4709A
ELECTRICAL CHARACTERISTICS
DC Characteristics
(IL = 30 mA, VBB = –24/–48 V, VCC = 5 V, VEE = –5 V, Ta = 25°C)
Parameter
Symbol
IBB
Condition
Min.
—
—
—
—
—
—
—
—
—
—
—
—
Typ. Max. Unit
1.7
4.0
1
2.6
6.0
1.5
6.2
8.1
1.8
2.3
6.0
1.5
7.5
9.2
1.8
VBB = –24 V
ON-HOOK
ICC
IEE
mA
mA
IBB
3.7
5.4
1.2
1.5
4.0
1
VBB = –24 V
ICC
OFF-HOOK
IEE
Power Supply Current
IBB
VBB = –48 V
ICC
ON-HOOK
IEE
IBB
5.0
6.1
1.2
VBB = –48 V
ICC
OFF-HOOK
IEE
VBB = –24 V
ON-HOOK
Pds24
Pd24
—
—
—
—
70
100
200
150
420
V
BB = –24 V
130
100
280
OFF-HOOK
mW
Power Dissipation
VBB = –48 V
Pds48
Pd48
ON-HOOK
V
BB = –48 V
OFF-HOOK
IL50
IL400
IL1K
RL = 50 W
RL = 400 W
26
26
—
–3
30
30
—
—
34
34
—
1.2
Loop Current
mA
V
RL = 1 kW
Relay Driver Output Voltage
VRSI-RSO
IRSI-RSO = 30 mA
7/11
¡ Semiconductor
AC Characteristics
Parameter
MSA4709A
( VBB = –24/–48 V, VCC = 5 V, VEE = –5 V, Ta = 25°C )
Symbol
G24
Condition
Min.
—
Typ. Max. Unit
2WÆ4W
4.0
–4.0
—
—
—
Vi = 0 dBm0
f = 1 kHz
Transmit &
dB
dB
Receive Gain
4WÆ2W
2WÆ4W
4WÆ2W
2W
G42
—
DL24
DL42
NI2
–0.1
–0.1
—
0.1
0.1
–81
–81
—
f = 0.3 to 3.4 kHz
Vi = –55 to +3 dBm0
Insertion Loss
Variety
—
—
Idel Channel Noise
Psohometric Filter
dBm0P
dBP
dB
4W
NI4
—
—
2WÆ4W
4WÆ2W
2W
SN24
SN42
LB2W
LB4W
LM
53
—
f = 1 kHz
Vi = 0 dBm0
Signal to Distortion
Ratio
53
—
—
40
—
—
Longitudinal
Balance
f = 0.3 kHz to 3.4 kHz
4W
40
—
—
Return Loss
20
—
—
dB
dB
f = 0.3 kHz to 3.4 kHz
f = 0.3 kHz to 3.4 kHz
Transhybrid Loss
LR
23
—
—
2WÆ4W
4WÆ2W
VBBÆ2W
VCCÆ2W
VEEÆ2W
VBBÆ4W
VCCÆ4W
VEEÆ4W
IAC24
IAC42
LB2
LC2
LE2
53
53
20
20
20
20
20
20
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
IAC = 12.8 mArms
Vi = 0 dBm0
AC Induction
Tolerance
dBP
f = 0.3 kHz to 3.4 kHz
Vin = 24.5 mVrms
dB
Power Supply
Rejection Ratio
LB4
LC4
LE4
f = 0.3 kHz to 3.4 kHz
Vin = 24.5 mVrms
dB
8/11
¡ Semiconductor
MSA4709A
APPLICATION CIRCUIT
• V : –48 V
BB
• Loop Current I : 30 mA
L
• Equivalent Terminal Impedance : 600W + 1mF
+5V –5V
VBB
VBB
27k
–
+
(*4)
750W
(*3)
1m
510k
(*5)
1m
RB VBS VCC VEE IL
G
+
–
VBB
187k
CDC
CODEC
4.7k
51W
RY
PE
PB
0.028m
GSX
21k
PCM
OUT
AIN–
(*1)
ZX
FHW
BHW
r1
0.028m
TIP
AIN+
B
BN
2.2k
2.2k
42k
MSM6999
PCM
IN
(*6)
2.7k
MSA4709A
A
RING
ZR
12k
4WR
AOUT+
r1
(*1)
1m
NB
NE
+
–
CDP
CB
4700pF
51W
(*5)
750W
VBB
RG
CN
VBB
1m
RSI
RSO
(*2)
R1
RI
BF
SEL
SCN
VBB or VEE
(Controller)
+
–
750
1m
VCC
RG
RB
510k
R1
TIP
r1
RSI
RSO
RI
RING
750W
VBB
VBB
Fig. 1
Fig. 2
9/11
¡ Semiconductor
MSA4709A
Notes: *1. Use heat sinks required for Darlinton-connected power transistors.
*2. This diagram indicates that V or V (negative supply) is used for driving the
BB
EE
relay, but a positive supply, such as V indicated in Fig. 2, can also be used.
EE
*3. This diagram indicates that the ring trip circuit consists of the RING line connected
to ground through the riging current source and the TIP line connected to the
battery (V ), but the ring trip circuit can also be configured, using the RG pin
BB
indicated in Fig. 2, by the RING line connected to the battery through the ringing
current source and the TIP line connected to ground.
*4. This diagram indicates V =–48V. If –24V is used for V , connect the V pin to
BB
BB
BS
V
33 mF.
andchangetheringtripfilteringconstantsfrom510kWplus1mFto150kWplus
CC
*5. Use a resistor with precision of 0.1% or better.
*6. Connect additional circuits for suppressing or absorbing surge and noise caued by
relay contacts.
Battery Feed Characteristics
VBB = –48V
VBB = –24V
40
30
20
10
0
40
30
20
10
0
IL = 40 mA
IL = 30 mA
0.5
1
1.5
1
2
Loop Resistance RL (kW)
Loop Resistance RL (kW)
10/11
¡ Semiconductor
PACKAGE DIMENSIONS
SDIP30-P-400-1.78
MSA4709A
(Unit : mm)
Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)
Epoxy resin
42 alloy
Solder plating
5 mm or more
1.80 TYP.
11/11
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