MSA4709A

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) 1/11 Free Datasheet http://www.datasheet-pdf.com/ 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 2/11 Free Datasheet http://www.datasheet-pdf.com/ ¡ Semiconductor MSA4709A PIN CONFIGURATION (TOP VIEW) VBB 1 A 2 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 ...