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E2A0032-16-X0
Semiconductor MSA4709A
Semiconductor Subscriber Line Interface Circuit
This version: MSA4709A Jan. 1998 Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSA4709A is designed to provide BSH functions and to meet PABX transmission performance 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 (VBB = -24 V/-48 V). * 1 channel built-in relay driver. * Package: 30-pin plastic Shrink DIP (SDIP30-P-400-1.78) (Product name: MSA4709ASS)
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BLOCK DIAGRAM
Semiconductor
CDP CB G PE PB TIP Current DET TIP Current Drive Amp. IL
SCN
SEL
RG RB
Loop & Fault DET
RING TRIP
TIP
B
ZX BN Over Voltage Protection Interface Circuit HYB ZR 4WR
ZX Zb Zt ZFR ZR
4WS
RING
A
4WR
NB NE VBB
Ring Current DET Ring Current Drive Amp.
VBS Relay Driver BF
RSI CN CDC RY RSO VBB or VEE RI VCC VEE
MSA4709A
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Semiconductor
MSA4709A
PIN CONFIGURATION (TOP VIEW)
VBB 1 A2 NE 3 NB 4 RSO 5 CN 6 RY 7 CDC 8 RSI 9 RB 10 RG 11 VEE 12 4WR 13 BN 14 ZR 15
30 NC 29 B 28 PE 27 PB 26 G 25 CB 24 ZX 23 VCC 22 RI 21 BF 20 VBS 19 IL 18 CDP 17 SEL 16 SCN
30-Pin Plastic Shrink DIP
Note:
NC: No connect pin
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Semiconductor
MSA4709A
PIN DESCRIPTION
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Name VBB A NE NB RSO CN RY CDC RSI RB RG VEE 4WR BN ZR Description Battery supply, -48 V or -24 V input. The Ring voltage sensing input. This input is high impedance (apr. 37 kW), and is 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. 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. 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). Relay driver current source terminal. Ring-Trip filtering capacitor input (RING). Ring-Trip filtering capacitor input (TIP). -5 V input. Receive input and is connected to the negative input of the built-in buffer operational amplifier. 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 opencollector with a built-in pull-up resistor. (apr. 10 kW). Condition * ON-Hook 16 SCN * OFF-Hook * Dial pulse: break * Dial pulse: make * RING TRIP * Ground/Battery fault SEL = "H" H L H L L L SEL = "L" H H H H H L
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Semiconductor
MSA4709A
Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Name SEL CDP IL VBS BF RI VCC ZX CB G PB PE B NC
Description SCN output information select control input. At SEL = "L", SCN Indicates only ground/ battery fault condition. Dial pulse shaping capacitor input. Tip to Ring constant loop current determination resistor input. Supply voltage selection terminal. VBS = 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). Relay driver control input. +5 V input 2 wire terminating impedance compornent Zx input. This pin has a low input impedance. Compensation capacitor input. This capacitor value is 4700 pF(35V). Ground input. 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. The Tip voltage sensing input. This input is high impedance (apr. 37 kW) and is connected to the built-in over voltage protection circuit. No connection RI = "H" is Driver "ON"
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Semiconductor
MSA4709A
ABSOLUTE MAXIMUM RATINGS
(Ta = 25C) Parameter Symbol VBB Power Supply Voltage VCC VEE Digital Input Voltage Relay Driver Current Operating Temperature Storage Temperature VIN IRD Top TSTG Condition VBS = G VBS = VCC -- -- -- VRI = H -- -- Rating -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 0 to 80 -55 to 150 V mA C C V Unit
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol VBB
Condition VBS = G VBS = VCC -- -- VBB = -48 V VBB = -24 V --
Min. -53 -30 +4.75 -5.25 0 0 0
Typ. -48 -24 +5 -5 -- -- --
Max. Unit -43 -21.6 +5.25 -4.75 2000 600 70 W C V
Power Supply Voltage
VCC VEE
Loop Resistance Operating Ambient Temperature
RL Ta
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Semiconductor
MSA4709A
ELECTRICAL CHARACTERISTICS
DC Characteristics
(IL = 30 mA, VBB = -24/-48 V, VCC = 5 V, VEE = -5 V, Ta = 25C) Parameter Symbol IBB ICC IEE IBB ICC Power Supply Current IEE IBB ICC IEE IBB ICC IEE Pds24 Pd24 Power Dissipation Pds48 Pd48 IL50 Loop Current Relay Driver Output Voltage IL400 IL1K VRSI-RSO VBB = -24 V ON-HOOK VBB = -24 V OFF-HOOK VBB = -48 V ON-HOOK VBB = -48 V OFF-HOOK RL = 50 W RL = 400 W RL = 1 kW IRSI-RSO = 30 mA VBB = -48 V OFF-HOOK VBB = -48 V ON-HOOK VBB = -24 V OFF-HOOK Condition VBB = -24 V ON-HOOK Min. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 26 26 -- -3 Typ. 1.7 4.0 1 3.7 5.4 1.2 1.5 4.0 1 5.0 6.1 1.2 70 130 100 280 30 30 -- -- Max. Unit 2.6 6.0 1.5 6.2 8.1 1.8 2.3 6.0 1.5 7.5 9.2 1.8 100 200 mW 150 420 34 34 -- 1.2 V mA mA mA
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Semiconductor AC Characteristics
MSA4709A
( VBB = -24/-48 V, VCC = 5 V, VEE = -5 V, Ta = 25C ) Parameter Transmit & Receive Gain Insertion Loss Variety Idel Channel Noise Signal to Distortion Ratio Longitudinal Balance Return Loss Transhybrid Loss AC Induction Tolerance 2WAE4W 4WAE2W VBBAE2W VCCAE2W Power Supply Rejection Ratio VEEAE2W VBBAE4W VCCAE4W VEEAE4W 2WAE4W 4WAE2W 2WAE4W 4WAE2W 2W 4W 2WAE4W 4WAE2W 2W 4W Symbol G24 G42 DL24 DL42 NI2 NI4 SN24 SN42 LB2W LB4W LM LR IAC24 IAC42 LB2 LC2 LE2 LB4 LC4 LE4 f = 0.3 kHz to 3.4 kHz Vin = 24.5 mVrms Condition Vi = 0 dBm0 f = 1 kHz f = 0.3 to 3.4 kHz Vi = -55 to +3 dBm0 Psohometric Filter f = 1 kHz Vi = 0 dBm0 f = 0.3 kHz to 3.4 kHz f = 0.3 kHz to 3.4 kHz f = 0.3 kHz to 3.4 kHz IAC = 12.8 mArms Vi = 0 dBm0 f = 0.3 kHz to 3.4 kHz Vin = 24.5 mVrms Min. -- -- -0.1 -0.1 -- -- 53 53 40 40 20 23 53 53 20 20 20 20 20 20 Typ. 4.0 -4.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Max. Unit -- -- 0.1 0.1 -81 -81 -- -- -- -- -- -- -- -- -- -- -- -- -- -- dB dB dB dBm0P dBP dB dB dB dBP
dB
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Semiconductor
MSA4709A
APPLICATION CIRCUIT
* VBB : -48 V * Loop Current IL : 30 mA * Equivalent Terminal Impedance : 600W + 1mF
VBB 750W (*3)
-
VBB 510k (*5) 51W
+
+5V -5V 1m (*4) RB G PE VBS VCC VEE IL CDC 4.7k RY ZX BN MSA4709A 2.7k ZR 4WR NB NE VBB RG RSI RSO RI BF SEL SCN CDP CB CN 1m 1m
+ -
27k 1m
+ -
VBB 0.028m 21k 0.028m 187k GSX AIN- AIN+
CODEC
r1 TIP (*6) RING r1
(*1) 2.2k 2.2k (*1) 51W (*5) VBB (*2) R1 VBB or VEE
PB B A
PCM OUT
FHW
42k 12k
MSM6999 PCM IN AOUT+
BHW
750W
4700pF
(Controller)
750
VCC R1 RSI RSO RI
+ -
1m RG
510k TIP r1 RING 750W VBB VBB RB
Fig. 1
Fig. 2
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Semiconductor
MSA4709A
Notes: *1. Use heat sinks required for Darlinton-connected power transistors. *2. This diagram indicates that VBB or VEE (negative supply) is used for driving the relay, but a positive supply, such as VEE indicated in Fig. 2, can also be used. *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 (VBB), but the ring trip circuit can also be configured, using the RG pin 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 VBB=-48V. If -24V is used for VBB, connect the VBS pin to VCC and change the ring trip filtering constants from 510 kW plus 1 mF to 150 kW plus 33 mF. *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 40 40 VBB = -24V
IL = 40 mA
Loop Current IL (mA)
Loop Current IL (mA)
30 IL = 30 mA 20
30
20
10
10
0
1 2 Loop Resistance RL (kW)
0
0.5 1 1.5 Loop Resistance RL (kW)
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Semiconductor
MSA4709A
PACKAGE DIMENSIONS
(Unit : mm)
SDIP30-P-400-1.78
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.
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