(Hong Kong)
Product Summary
The AM79R70AJC is a ringing subscriber line interface circuit.
Parametrics
AM79R70AJC absolute maximum ratings: (1)Storage temperature : - 55°C to +150°C; (2)VCC with respect to AGND/DGND : 0.4 V to +7 V; (3)VNEG with respect to AGND/DGND : 0.4 V to VBAT2; (4)VBAT2 : VBAT1 to GND VBAT1 with respect to AGND/DGND: Continuous: +0.4 V to - 80 V,; (5)10 ms: +0.4 V to - 85 V; (6)BGND with respect to AGND/DGND: +3 V to - 3 V; (7)A(TIP)or B(RING)to BGND: Continuous : VBAT1 - 5 V to +1 V; (8)10 ms (f = 0.1 Hz): VBAT1 - 10 V to +5 V; (9)1 μs (f = 0.1 Hz): VBAT1 - 15 V to +8 V; (10)250 ns (f = 0.1 Hz): VBAT1 - 20 V to +12 V; (11)Current from A(TIP)or B(RING): ±150 mA; (12)RYOUT1, RYOUT2 current: 75 mA; (13)RYOUT1, RYOUT2 voltage : RYE to +7 V; (14)RYOUT1, RYOUT2 transient : RYE to +10 V; (15)RYE voltage : BGND to VBAT1; (16)C3- C1, D2- D1, E1, B2EN, and RINGIN Input voltage : - 0.4 V to VCC + 0.4 V; (17)Maximum power dissipation, continuous, TA = 70°C, No heat sink (See note): In 32-pin PLCC package: 1.67 W.
Features
AM79R70AJC features: (1)Ideal for ISDN-TA and set top applications; (2)On-chip ringing with on-chip ring-trip detector; (3)Low standby state power; (4)On-chip battery switching and feed selection; (5)On-hook transmission; (6)Polarity reversal option; (7)Programmable constant-current feed; (8)Programmable OpeCircuit voltage; (9)Programmable loop-detect threshold; (10)Current gai= 1000; (11)Two-wire impedance set by single component; (12)Ground-key detector; (13)Tip Opestate for ground-start lines; (14)Internal VEE regulator (no external –5 V power supply required); (15)Two on-chip relay drivers and snubber circuits.
Diagrams
