4-1

TM

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

1-888-INTERSIL or 321-724-7143

File Number

4659.5

HC55120, HC55121, HC55130, HC55131, HC55140,

HC55141, HC55142, HC55143, HC55150, HC55151

Low Power Universal SLIC Family

The UniSLIC14 is a family of Ultra Low Power SLICs. The

feature set and common pinouts of the UniSLIC14 family

positions it as a universal solution for: Plain Old Telephone

Service (POTS), PBX, Central Office, Loop Carrier, Fiber in the

Loop, ISDN-TA and NT1+, Pairgain and Wireless Local Loop.

The UniSLIC14 family achieves its ultra low power operation

through: Its automatic single and dual battery selection

(based on line length) and battery tracking anti clipping to

ensure the maximum loop coverage on the lowest battery

voltage. This architecture is ideal for power critical

applications such as ISDN NT1+, Pairgain and Wireless

local loop products.

The UniSLIC14 family has many user programmable

features. This family of SLICs delivers a low noise, low

component count solution for Central Office and Loop

Carrier universal voice grade designs. The product family

integrates advanced pulse metering, test and signaling

capabilities, and zero crossing ring control.

The UniSLIC14 family is designed in the Intersil “Latch” free

Bonded Wafer process. This process dielectrically isolates

the active circuitry to eliminate any leakage paths as found in

our competition’s JI process. This makes the UniSLIC14

family compliant with “hot plug” requirements and operation

in harsh outdoor environments.

Block Diagram

Features

• Ultra Low Active Power (OHT) < 60mW

• Single/Dual Battery Operation

• Automatic Silent Battery Selection

• Power Management/Shutdown

• Battery Tracking Anti Clipping

• Single 5V Supply with 3V Compatible Logic

• Zero Crossing Ring Control

- Zero Voltage On/Zero Current Off

• Tip/Ring Disconnect

• Pulse Metering Capability

• 4 Wire Loopback

• Programmable Current Feed

• Programmable Resistive Feed

• Programmable Loop Detect Threshold

• Programmable On-Hook and Off-Hook Overheads

• Programmable Overhead for Pulse Metering

• Programmable Polarity Reversal Time

• Selectable Transmit Gain 0dB/-6dB

• 2 Wire Impedance Set by Single Network

• Loop and Ground Key Detectors

• On-Hook Transmission

• Common Pinout

• HC55121

- Polarity Reversal

• HC55130

- -63dB Longitudinal Balance

• HC55140

- Polarity Reversal

- Ground Start

- Line Voltage Measurement

- 2 Wire Loopback

- -63dB Longitudinal Balance

• HC55142

- Polarity Reversal

- Ground Start

- Line Voltage Measurement

- 2 Wire Loopback

• HC55150

- Polarity Reversal

- Line Voltage Measurement

- 2 Wire Loopback

Applications

• Related Literature

- AN9871, User’s Guide for UniSLIC14 Eval Board

RRLY

DT

DR

TIP

RING

RING AND TEST

RELAY DRIVERS

RING TRIP

DETECTOR

BGND

BATTERY

SELECTION

AND

BIAS

NETWORK

ZERO CURRENT

2-WIRE

INTERFACE

CROSSING

TRLY1

TRLY2

C1

C2

C3

GKD_LVM

ROH

RD

CDC

RDC_RAC

ZT

LOOP CURRENT

DETECTOR

PTG

ILIM

STATE

DECODER

AND

DETECTOR

LOGIC

GKD/LOOP LENGTH

DETECTOR

RSYNC_REV

SHD

4-WIRE INTERFACE

VF SIGNAL PATH

LINE FEED

CONTROL

C4

C5

CRT_REV_LVM

POLARITY

REVERSAL

PULSE METERING

SPM

SIGNAL PATH

AGND

Data Sheet

June 2000