AM79D2251JC AMD [Advanced Micro Devices], AM79D2251JC Datasheet

AM79D2251JC

Manufacturer Part Number

AM79D2251JC

Description

Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC)

Manufacturer

AMD [Advanced Micro Devices]

Datasheet

1.AM79D2251JC.pdf (35 pages)

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Am79D2251

Dual Intelligent Subscriber Line Audio-Processing Circuit (ISLAC )

DISTINCTIVE CHARACTERISTICS

BLOCK DIAGRAM

High performance digital signal processor

provides programmable control of all major

linecard functions

— 32 and 24 kb/s ADPCM to G726, as well as

— DC loop feeding

— Loop supervision

— Ringing generation and control

— Adaptive hybrid balance

— Line and circuit testing

A-law/ -law and linear codec

— Transmit and receive gain

— Two-wire AC impedance

— Transhybrid balance

— Equalization

— Smooth or abrupt polarity reversal

— Off-hook debounce circuit

— Ground-key and ring-trip filters

Protection

Networks

and

Intelligent Access

ISLIC

Ring-Trip

Resistors

Sense

™

BATH

BATL

BATP

Voice Solutions

— Tone generation

— Metering generation at 12 kHz and 16 kHz

Selectable PCM/MPI or GCI digital interfaces

— Supports most available master clock

0 to 70°C commercial operation

— –40°C to 85°C extended temperature range

+3.3 V DC operation

Exceeds LSSGR and ITU requirements

Supports external ringing with on-chip ring-trip

circuit

— Automatic or manual ring-trip modes

DTMF detection according to Q.24

2100 Hz modem tone detection according to V.25

— Envelope shaping and level control

frequencies from 512 kHz to 8.196 MHz

available

RSPB

RREF

RSHB

RSLB

AGND1

AGND2

P1-P3

VREF

LD1

LD2

Pub. # 22829

Issue Date: December 1999

ISLAC

Dual

Rev: C

Amendment: /0

VCCA

VCCD

DGND1

DGND2

DRA/DD

DXA/DU

DCLK/S0

PCLK/FS

MCLK

FS/DCL

CS/RST

DIO/S1

INT

TSCA/G

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