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Copyright © Intersil Americas Inc. 2002. All Rights Reserved

,

8-131

®

Description

The HC-5509A1 telephone Subscriber Line Interface Circuit

integrates most of the BORSCHT functions on a monolithic

IC. The device is manufactured in a Dielectric Isolation (DI)

process and is designed for use as a high voltage interface

between the traditional telephone subscriber pair (Tip and

Ring) and the low voltage filtering and coding/decoding func-

tions of the line card. Together with a secondary protection

diode bridge and “feed” resistors, the device will withstand

1000V lightning induced surges, in plastic packages. The

SLIC also maintains specified transmission performance in

the presence of externally induced longitudinal currents. The

BORSCHT functions that the SLIC provides are:

• Battery Feed with Subscriber Loop Current Limiting

• Overvoltage Protection

• Ring Relay Driver

• Supervisory Signaling Functions

• Hybrid Functions (with External Op-Amp)

• Test (or Battery Reversal) Relay Driver

In addition, the SLIC provides selective denial of power to

subscriber loops, a programmable subscriber loop current

limit from 20 to 60mA, a thermal shutdown with an alarm out-

put and line fault protection. Switch hook detection, ring trip

detection and ground key detection functions are also incor-

porated in the SLIC device.

The HC-5509A1 SLIC is ideally suited for line card designs

in PBX and CO systems, replacing traditional transformer

solutions.

Features

• DI Monolithic High Voltage Process

• Compatible with Worldwide PBX and CO Performance

Requirements

• Controlled Supply of Battery Feed Current with Programmable

Current Limit

• Internal Ring Relay Driver and a Utility Relay Driver

• High Impedance Mode for Subscriber Loop

• High Temperature Alarm Output

• Low Power Consumption During Standby Functions

• Switch Hook, Ground Key, and Ring Trip Detection

• Selective Power Denial to Subscriber

• Voice Path Active During Power Denial

• On Chip Op-Amp for 2 Wire Impedance Matching

Applications

• Solid State Line Interface Circuit for PBX or Central Office

Systems, Digital Loop Carrier Systems

• Hotel/Motel Switching Systems

• Direct Inward Dialing (DID) Trunks

• Voice Messaging PBX’s

• High Voltage 2W/4W, 4W/2W Hybrid

Ordering Information

PART NUMBER

TEMP. RANGE

PACKAGE

HC1-5509A1-5

28 Lead Ceramic DIP

HC1-5509A1-9

28 Lead Ceramic DIP

HC3-5509A1-5

28 Lead Plastic DIP

HC3-5509A1-9

-40

28 Lead Plastic DIP

HC4P5509A1-5

44 Lead PLCC

HC4P5509A1-9

44 Lead PLCC

HC9P5509A1-5

28 Lead SOIC

PRELIMINARY

May 1997

Pinouts

HC-5509A1 (PDIP, CDIP, SOIC)

TOP VIEW

C2

RF

TF

VFB

VTX

LAO

VRX

RFS

RING

VB-

BG

28

27

26

24

23

22

21

20

19

18

17

16

15

25

PR

RD

PRI

VB+

1

2

3

4

5

6

7

8

9

10

11

12

13

14

AG

RS

ILMT

OUT 1

-IN 1

TIP

F0

C1

F1

SHD

GKD

TST

ALM

TRUTH TABLE

F1

F0

ACTION

0

0

Normal Loop Feed

01

RD Active

1

0

Power Down Latch

RESET

1

0

Power on RESET

1

1

Loop Power

Denial Active

HC-5509A1 (PLCC)

TOP VIEW

15

14

13

12

11

10

9

8

7

17

16

N/C

F1

F0

ALM

N/C

N/C

RS

SHD

X

GKD

1

2

3

4

5

640

41

42

43

44

18 19 20 21 22 23 24 25 26 27 28

31

32

33

34

35

36

37

38

39

29

30

TF2

VFB

RD

DG

VTX

LAO

N/C

N/C

BG

PR

PRI

TST

N/C

HC-5509A1

SLIC

Subscriber Line Interface Circuit

File Number

3567.1

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