LE58QL022BVC datasheet(1/61 Pages) ZARLINK

Part #	LE58QL022BVC

Description	Quad Low Voltage Subscriber Line Audio-Processing Circuit VE580 Series

PDF	61 Pages

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Manufacturer	ZARLINK [Zarlink Semiconductor Inc]

Direct Link	http://www.zarlink.com

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1 / 61 page

NOTE: On August 3, 2007, Zarlink Semiconductor acquired the products and

technology of Legerity Holdings.

Document ID# 080814

Date:

April 09 2009

Version:

5

Distribution:

Public Document

Le58QL022

Quad Low Voltage Subscriber Line Audio-Processing Circuit

VE580 Series

APPLICATIONS

Codec function on telephone switch line cards

FEATURES

Low-power, 3.3 V CMOS technology with 5 V tolerant

digital inputs

Software and coefficient compatible to the Am79Q02/

021/031 QSLAC device

Performs the functions of four codec/filters

Software programmable:

— SLIC input impedance

— Transhybrid balance

— Transmit and receive gains

— Equalization (frequency response)

— Digital I/O pins

— Programmable debouncing on one input

— Time slot assigner

— Programmable clock slot and PCM transmit clock edge

options

Standard microprocessor interface

A-law, µ-law, or linear coding

Single or Dual PCM ports available

— Up to 128 channels (PCLK at 8.192 MHz) per PCM port

— Optional supervision on the PCM highway

1.536, 1.544, 2.048, 3.072, 3.088, 4.096, 6.144, 6.176, or

8.192 MHz master clock derived from MCLK or PCLK

Built-in test modes with loopback, tone generation,

and µP access to PCM data

Mixed state (analog and digital) impedance scaling

Performance guaranteed over a 12 dB gain range

Real Time Data register with interrupt (open drain or

TTL output)

Supports multiplexed SLIC device outputs

Broadcast state

256 kHz or 293 kHz chopper clock for Legerity SLIC

devices with switching regulator

Maximum channel bandwidth for V.90 modems

ORDERING INFORMATION

1.

The green package meets RoHS Directive 2002/95/EC of the

European Council to minimize the environmental impact of

electrical equipment.

2.

For delivery using a tape and reel packing system, add a "T" suffix

to the OPN (Ordering Part Number) when placing an order.

Device

Package (Green)1

Packing2

Le58QL022BVC

44-pin TQFP

Tray

RELATED LITERATURE

080754 Le58QL061/063 QLSLAC™ Data Sheet

080147 Le79Q02/021/031 QSLAC™ Data Sheet

080193 Le79Q061/063 QSLAC™ Data Sheet

080761 QSLAC™ to QLSLAC™ Design Conversion

Guide

080758 QSLAC™ to QLSLAC™ Guide to New Designs

DESCRIPTION

The Le58QL022 Quad Low Voltage Subscriber Line Audio-

Processing Circuit (QLSLAC™) devices integrate the key

functions of analog line cards into high-performance, very-

programmable, four-channel codec-filter devices. The

QLSLAC devices are based on the proven design of Legerity’s

reliable SLAC™ device families. The advanced architecture of

the QLSLAC devices implements four independent channels

and employs digital filters to allow software control of

transmission, thus providing a cost-effective solution for the

audio-processing function of programmable line cards. The

QLSLAC devices are software and coefficient compatible to the

QSLAC devices.

Advanced submicron CMOS te chno logy makes the

Le58QL022 QLSLAC devices economical, with both the

functionality and the low power consumption needed in line

card designs to maximize line card density at minimum cost.

When used with four Legerity SLIC devices, a QLSLAC device

provides a complete software-configurable solution to the

BORSCHT functions.

BLOCK DIAGRAM

Signal Processing

Channel 1 (CH 1)

Signal Processing

Channel 2 (CH 2)

Signal Processing

Channel 3 (CH 3)

Signal Processing

Channel 4 (CH 4)

VIN

1

VOUT

1

VIN

2

VOUT

2

VIN

3

VOUT

3

VIN

4

VOUT

4

Analog

SLIC

Clock

&

Reference

Circuits

SLIC

Interface

(SLI)

VREF

CD1

1

CD2

1

C3

1

C4

1

C5

1

CD1

2

CD2

2

C3

2

C4

2

C5

2

CD1

3

CD2

3

C3

3

C4

3

C5

3

CD1

4

CD2

4

C3

4

C4

4

C5

4

Time Slot Assigner

(TSA)

DXA

DRA

TSCA

DXB

DRB

TSCB

Microprocessor Interface

(MPI)

INT

CS

DIO

DCLK

RST

FS

PCLK

MCLK/E1

Dual/Single

PCM

Highway

Microprocessor

CHCLK

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