AM79R70-1JC Advanced Micro Devices, AM79R70-1JC Datasheet
AM79R70-1JC
Available stocks
Related parts for AM79R70-1JC
AM79R70-1JC Summary of contents
Page 1
... PRELIMINARY Am79R70 Ringing Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Ideal for ISDN-TA and set top applications On-chip ringing with on-chip ring-trip detector Low standby state power Battery operation: — – –67 V BAT1 — – BAT2 BAT1 On-chip battery switching and feed selection ...
Page 2
... SLIC automatically switches to a higher voltage in the On-hook (standby) state. Like all of the AMD SLIC devices, the Am79R70 Ringing SLIC device supports on-hook transmission, ring-trip detection and programmable loop-detect threshold. The Am79R70 Ringing SLIC device is a programmable constant-current feed device with two on-chip relay drivers to operate external relays ...
Page 3
... J = 32-pin Plastic Leaded Chip Carrier (PL 032) POLARITY REVERSAL OPTION Blank = No Polarity Reversal –1 = Polarity Reversal DEVICE NUMBER/DESCRIPTION Am79R70 Subscriber Line Interface Circuit Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of ...
Page 4
... Pin 1 is marked for orientation connect 32-Pin PLCC Am79R70 Data Sheet RTRIP1 RTRIP2 HPB HPA RINGIN RDCR VTX VNEG RSN ...
Page 5
PIN DESCRIPTIONS Pin Names Type AGND/DGND Gnd A(TIP) Output B2EN Input BGND Gnd B(RING) Output C3–C1 Inputs D1 Input D2 Input DET Output E1 Input HPA Capacitor HPB Capacitor RD Resistor RDC Resistor RDCR — RINGIN Input RSGH Input RSGL ...
Page 6
... BAT1 The Operating Ranges define those limits between which the – BAT1 functionality of the device is guaranteed. – + Functionality of the device from + guaranteed by production testing. BAT1 + 0 Am79R70 Data Sheet BAT2 BAT1 min ...
Page 7
ELECTRICAL CHARACTERISTICS Description Transmission Performance 2-wire return loss Z , analog output impedance VTX V , analog output offset voltage VTX Z , analog input impedance RSN Overload level, 2-wire and 4-wire, off hook Active state Overload level, 2-wire THD ...
Page 8
... BAT2 L Open Circuit state Standby state OHT state Active state–normal Open Circuit state Standby state OHT state Active state–normal Open Circuit state Standby state OHT state Active state–normal Am79R70 Data Sheet Min Typ Max Unit Note 0. ...
Page 9
ELECTRICAL CHARACTERISTICS (continued) Description Logic Inputs (C3–C1, D2–D1, E1, and B2EN Input High voltage Input Low voltage Input High current Input Low current IL Logic Output DET V , ...
Page 10
... Table 1. SLIC Decoding (DET) Output 2-Wire Status Ring trip Ring trip Loop detector Loop detector Loop detector Loop detector Loop detector Loop detector on-hook battery must be used. BAT1 Am79R70 Data Sheet = + – 600 , CC NEG L = 1.2 µ 1N400x 1.5 µ 150 0.33 µ ...
Page 11
Table 2. User-Programmable Components Z = 500 Z – 2WIN F Z 1000 ----------- - ------------------------------------------------- - 500 42L 2500 -------------- - R ...
Page 12
... ASH V APPH = ------------------------------------------------------------------------------ - DC1 DC2 ------------------------------------- - + LOOP 600 Am79R70 Data Sheet 4) V ASH 1) Constant-Current Region 2) V ASL resistor to GND, B2EN = logic Low. SGL = resistor B2EN = logic Low. SGL CC must be greater than 100 resistor to GND, B2EN = logic High. SGH = resistor B2EN = logic High ...
Page 13
RING-TRIP COMPONENTS RT2 ----------------------------------------------------------------------------------------------------------------------------------------- - R = 300 CF RT1 Vbat 3.5 – – 300 CF where R = Loop-detection threshold resistance for ring trip and CF = Crest ...
Page 14
... R L AGND B(RING) RSN / V ) BRS = 20 log (V RX A(TIP) VTX R L SLIC AGND B(RING) RSN S2 Closed, S1 Open / V ) 4-L Long. Sig. Gen log ( Longitudinal Balance Am79R70 Data Sheet ...
Page 15
TEST CIRCUITS (continued The desired impedance; D e.g., the characteristic impedance of the line V CC A(TIP 600 L B(RING) E. Loop-Detector Switching HF GEN 50 1.5 Vrms 80% Amplitude Modulated 100 ...
Page 16
... DC1 80 k RDC R DCR RYOUT1 RDCR 2.0 k RYOUT2 RYE B2EN C1 C2 VBAT1 VBAT2 E1 DET BGND RINGIN AGND/ DGND H. Am79R70 Test Circuit Am79R70 Data Sheet +5 V – SGH open R SGL open 300 DC2 1.2 µ SLEW 100 k See Note ...
Page 17
... Copyright 1998 Advanced Micro Devices, All rights reserved. AMD, the AMD logo and combinations thereof are trademarks of Advanced Micro Devices, Inc. DSLAC and QSLAC are trademarks of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. ...