HC5521CQ INTERSIL [Intersil Corporation], HC5521CQ Datasheet

HC5521CQ

Manufacturer Part Number

HC5521CQ

Description

SLIC Subscriber Line Interface Circuit

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.HC5521CQ.pdf (1 pages)

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ADVANCE INFORMATION

January 1997

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Features

• Normal and Reversed DC Feed

• 30mA Current Limit

• Ringing, Test-In, and Test-Out Relay Drivers

• Ground Key Detector with Seperate Logic Output

• Thermal Shutdown Protection with Alert Signal

• On-Hook Transmission

• Selectable Transmit and Receive Gain Setting

• Selectable 2-Wire Impedance Matching

• Zero Crossing Ring Trip Detection and Ring Relay

• Parallel Digital Control and Status Monitoring

• Protection Resistors inside Feedback Loop allows the

Applications

• PABX/CO Line Circuits

Block Diagram

Release

use of PTC Devices without Impact on Longitudinal

Balance

Harris Corporation 1997

S E M I C O N D U C T O R

GKDO

D4RCI

D2PRI

D3PDI

BGND

RGND

SHDO

D5TBI

AGND

D6TAI

BAT

TEST CONTROL

BIAS

LOGIC

REFERENCE

BATTERY

RDC

CDC

4-35

Description

The HC5521 is a Monolithic Subscriber Line Interface Circuit

(SLIC) for Analog Subscriber Line cards in Central Ofﬁce

and PABX switches.

The HC5521 provides a comprehensive set of features for

these applications including loop reversal, ground key detec-

tion, zero crossing ring relay operation, long loop drive and a

mutually independent setting of the receive and transmit

gains, and the two-wire impedance synthesis. An option is

also provided for eliminating transhybrid balance on-chip.

Advanced power management features combined with a

small 44 lead MQFP package allow signiﬁcant board space

to be freed up for additional line circuits.

The HC5521 is fabricated in a Harris state of the art Bonded

Wafer High Voltage process, providing freedom from tradi-

tional JI latch-up phenomena without the use of additional

power supply ﬁltering components or substrate tie connec-

tions. The very low parasitics and leakages associated with

this process provide an exceptionally ﬂat performance over

frequency and temperature.

Ordering Information

HC5521CQ

HC5521CM

PART NUMBER

4-WIRE INTERFACE / Z

Subscriber Line Interface Circuit

MANAGEMENT

TX4W

INTERFACE

CONTROL

POWER

2-WIRE

RING

RANGE (

TEMP.

0 to 70

HC5521

KZO

44 Ld MQFP

44 Ld PLCC

TIP

TIPSEN

RINGSEN

RING

RBH

RBL

CRTD

RPSB

RPSR

RPST

RPSG

PACKAGE

File Number

Q44.10x10

N44.65

PKG. NO.

SLIC

4265

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