E2A0032-16-X0 ¡ Semiconductor MSA4709A ¡ Semiconductor This version: MSA4709A Jan. 1998 Previous version: Nov. 1996 Subscriber Line Interface Circuit 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) 1/11 SEL RG RB G PE PB TIP TIP Current DET TIP Current Drive Amp. Loop & Fault DET RING TRIP ZX B BN Interface Circuit Over Voltage Protection RING NE 4WS ZX Zb Zt HYB ZR A NB ¡ Semiconductor SCN IL BLOCK DIAGRAM CDP CB 4WR Ring Current DET Ring Current Drive Amp. ZFR ZR 4WR VBS Relay Driver BF VBB RSI CN RSO RY 2/11 VBB or VEE RI VCC VEE MSA4709A CDC ¡ Semiconductor MSA4709A PIN CONFIGURATION (TOP VIEW) 30 NC VBB 1 A 2 29 B NE 3 28 PE NB 4 27 PB 26 G RSO 5 CN 6 25 CB RY 7 24 ZX CDC 8 23 VCC RSI 9 22 RI RB 10 21 BF RG 11 20 VBS VEE 12 19 IL 4WR 13 18 CDP BN 14 17 SEL ZR 15 16 SCN 30-Pin Plastic Shrink DIP Note: NC: No connect pin 3/11 ¡ Semiconductor MSA4709A PIN DESCRIPTION Pin No. Name 1 VBB Description 2 A The Ring voltage sensing input. This input is high impedance (apr. 37 kW), and is connected to the built-in over voltage protection circuit. 3 NE The Ring current sensing input is connected to the emitter of NPN Darlington transistor and the power resistor REA. 4 NB The base drive output for the NPN Darlington transistor. 5 RSO 6 CN Battery noise rejection capacitor input. This capacitor value is 1 mF (60V). 7 RY AC performance adjusting resistor RY input. 8 CDC 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). 9 RSI Relay driver current source terminal. 10 RB Ring-Trip filtering capacitor input (RING). Battery supply, –48 V or –24 V input. Relay driver current sink terminal. 11 RG Ring-Trip filtering capacitor input (TIP). 12 VEE –5 V input. 13 4WR 14 BN Balancing network drive output. 15 ZR Receive gain adjust and frequency compensation input. Receive input and is connected to the negative input of the built-in buffer operational amplifier. 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 SEL = "H" SEL = "L" H H • OFF-Hook L H • Dial pulse: break H H • Dial pulse: make L H • RING TRIP L H • Ground/Battery fault L L 4/11 ¡ Semiconductor MSA4709A Pin No. Name Description 17 SEL SCN output information select control input. At SEL = "L", SCN Indicates only ground/ battery fault condition. 18 CDP Dial pulse shaping capacitor input. 19 IL 20 VBS 21 BF 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). 22 RI Relay driver control input. 23 VCC +5 V input 24 ZX 2 wire terminating impedance compornent Zx input. This pin has a low input impedance. 25 CB Compensation capacitor input. This capacitor value is 4700 pF(35V). 26 G Ground input. 27 PB The base drive output for the PNP Darlington power transistor. 28 PE The Tip current sensing input is connected to the emitter of the PNP Darlington power transister and the power resistor REB. 29 B The Tip voltage sensing input. This input is high impedance (apr. 37 kW) and is connected to the built-in over voltage protection circuit. 30 NC Tip to Ring constant loop current determination resistor input. Supply voltage selection terminal. VBS = VCC (–24 V), VBS = G (–48 V). RI = "H" is Driver "ON" No connection 5/11 ¡ Semiconductor MSA4709A ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Parameter Symbol VBB Power Supply Voltage Digital Input Voltage Condition Rating VBS = G –53.0 to +0.3 Unit VBS = VCC –30.0 to +0.3 VCC — –0.3 to +7.0 VEE — –7.0 to +0.3 VIN — –0.3 to VCC + 0.3 V V Relay Driver Current IRD VRI = H –30 mA Operating Temperature Top — 0 to 80 °C Storage Temperature TSTG — –55 to 150 °C RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min. Typ. Max. Unit VBS = G –53 –48 –43 VBS = VCC –30 –24 –21.6 VCC — +4.75 +5 +5.25 VEE — –5.25 –5 –4.75 VBB = –48 V 0 — 2000 VBB = –24 V 0 — 600 — 0 — 70 VBB Power Supply Voltage Condition Loop Resistance RL Operating Ambient Temperature Ta V W °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 ICC VBB = –24 V ON-HOOK 1.7 Max. Unit 2.6 4.0 6.0 — 1 1.5 IBB — 3.7 6.2 — 5.4 8.1 IEE — 1.2 1.8 IBB — 1.5 2.3 VBB = –24 V OFF-HOOK VBB = –48 V ON-HOOK — 4.0 6.0 IEE — 1 1.5 IBB — 5.0 7.5 — 6.1 9.2 — 1.2 1.8 ICC VBB = –48 V OFF-HOOK IEE Pds24 VBB = –24 V ON-HOOK — 70 100 Pd24 VBB = –24 V OFF-HOOK — 130 200 Pds48 VBB = –48 V ON-HOOK — 100 150 Pd48 VBB = –48 V OFF-HOOK — 280 420 IL50 RL = 50 W 26 30 34 IL400 RL = 400 W 26 30 34 IL1K RL = 1 kW — — — VRSI-RSO IRSI-RSO = 30 mA –3 — 1.2 Power Dissipation Relay Driver Output Voltage Typ. — — ICC Loop Current Min. IEE ICC Power Supply Current Condition mA mA mW mA V 7/11 ¡ Semiconductor MSA4709A AC Characteristics ( VBB = –24/–48 V, VCC = 5 V, VEE = –5 V, Ta = 25°C ) Parameter Symbol Condition Min. Vi = 0 dBm0 f = 1 kHz — 4.0 — — –4.0 — Transmit & Receive Gain 2WÆ4W G24 4WÆ2W G42 Insertion Loss Variety 2WÆ4W DL24 4WÆ2W DL42 2W NI2 4W NI4 2WÆ4W SN24 4WÆ2W SN42 2W LB2W 4W LB4W Idel Channel Noise Signal to Distortion Ratio Longitudinal Balance 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 Typ. Max. Unit –0.1 — 0.1 –0.1 — 0.1 — — –81 — — –81 53 — — 53 — — 40 — — 40 — — dB dB dBm0P dBP dB Return Loss LM f = 0.3 kHz to 3.4 kHz 20 — — dB Transhybrid Loss LR f = 0.3 kHz to 3.4 kHz 23 — — dB 2WÆ4W IAC24 53 — — 4WÆ2W VBBÆ2W IAC42 LB2 IAC = 12.8 mArms Vi = 0 dBm0 53 20 — — — — VCCÆ2W LC2 20 — — VEEÆ2W LE2 20 — — VBBÆ4W LB4 20 — — VCCÆ4W LC4 20 — — VEEÆ4W LE4 20 — — AC Induction Tolerance Power Supply Rejection Ratio f = 0.3 kHz to 3.4 kHz Vin = 24.5 mVrms f = 0.3 kHz to 3.4 kHz Vin = 24.5 mVrms dBP dB dB 8/11 ¡ Semiconductor MSA4709A APPLICATION CIRCUIT • VBB : –48 V • Loop Current IL : 30 mA • Equivalent Terminal Impedance : 600W + 1mF VBB +5V –5V VBB – 750W (*3) 510k + 1m 27k (*4) RB VBS VCC VEE G (*5) 51W 1m IL + VBB 4.7k RY PE PB (*1) r1 – CDC CODEC 187k 0.028m GSX 21k ZX PCM OUT FHW MSM6999 PCM IN AOUT+ BHW AIN– 0.028m TIP 2.2k (*6) 2.2k RING r1 BN 2.7k MSA4709A A AIN+ 42k ZR 12k 4WR (*1) 1m NB + – CDP NE 51W (*5) 750W B 4700pF CB CN VBB VBB 1m RG RSI (*2) RSO RI R1 BF SEL SCN VBB or VEE (Controller) + – 750 VCC 1m RG 510k R1 TIP r1 RSI RSO RI RING RB 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 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 30 IL = 30 mA 20 30 20 10 10 0 40 IL = 40 mA Loop Current IL (mA) Loop Current IL (mA) 40 VBB = –24V 1 2 Loop Resistance RL (kW) 0 0.5 1 1.5 Loop Resistance RL (kW) 10/11 ¡ 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. 11/11