Intersil Corporation HC5503T Datasheet

HC5503T

Data Sheet June 1998 File Number 4506

Balanced PBX/Key System SLIC,
Subscriber Line Interface Circuit

The Intersil HC5503T is a low cost Subscriber Line Interface
Circuit (SLIC) that replaces the components of a discrete
Transf ormer Analog circuit design. The monolithic integrated
design provides improved performance and system reliability .

The HC5503T provides: Current limited DC feed to the
subscriber loop, maintains a flat frequency response over the
voice band and beyond, has self resetting thermal protection
that allows conversation to continue while the fault is
present, provides a TTL subscriber off hook indication even
in the presence of longitudinal currents, and limits system
power consumption on short loops.

The HC5503T provides balanced 2-wire transmission and
has excellent longitudinal balance, while providing on hook
transmission and longitudinal current rejection in both the
on-hook or off-hook conditions.

The SLIC needs only one +5V supply in addition to the main
battery supply for loop current and operates over a range of
battery voltages (-24V to -58V).

Available in 22PDIP AND 24SO packaging. The HC5503T is
ideally suited as a replacement for discrete line circuits in
low cost analog PABXs, small Office/Home Office products
or Small Key Systems.

Features

• Monolithic Integrated Device

• Controlled Supply of BatteryFeedCurrent forShort Loops
(30mA)

• Single +5V Supply

• Allows Interfacing With All Ringing Systems

• Switch Hook Detection

• Compatible With Worldwide PBX Performance
Requirements

• Low Power Consumption During Standby

Applications

• PBX Switches (Analog, Digital or ISDN)

• Key Telephone Systems (KTS)

• ISDN PC Plug in Modems

• ISDN Small Office / Home Office (SOHO) Terminal
Adapters (TA)

• CTI (Computer Telephony Integration) Products

Ordering Information

TEMP.

PART NUMBER

HC5503TCP 0 to 75 22 Ld PDIP E22.4
HC5503TCB 0 to 75 24 Ld SOIC M24.3

RANGE (oC) PACKAGE PKG. NO.

Block Diagram

BGND

TF

RF

V

BAT

50

LOOP FEED

LOOP DETECTOR

RS

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

TIP

RING

SPEECH CIRCUIT

BIAS

V

CC

AGND

http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999

C1

TX

RX

SHD

DGND

HC5503T

Absolute Maximum Ratings (Note 1) Thermal Information

Maximum Continuous Supply Voltages

(V

). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60 to 0.5V

BAT

(VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 7V

(VCC - V

Relay Drive Voltage (VRD). . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 15V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75V

BAT

Operating Conditions

Temperature Range

HC-5503T-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 75oC

Positive Supply Voltage (VCC). . . . . . . . . . . . . . . . . . 4.75Vto 5.25V

Negative Supply Voltage (V

High Level Logic Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 2.4V

Low Level Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6V

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired. Functional
operability under any of these conditions is not necessarily implied.

2. θJA is measured with the component mounted on an evaluation PC board in free air.

) . . . . . . . . . . . . . . . . . .-24V to -58V

BAT

Thermal Resistance (Typical, Note 2) θJA (oC/W)

PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Maximum Junction Temperature (Plastic Package). . . . . . . . .150oC

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC

(SOIC - Lead Tips Only)

Die Characteristics

Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185

Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 x 102

Substrate Potential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connected

Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bipolar-DI

Electrical Specifications Unless Otherwise Specified, V

TA = 25oC. Min-Max Parameters are Over Operating Temperature Range

PARAMETER CONDITIONS MIN TYP MAX UNITS

Off Hook IB+R
Off Hook IB-R
Off Hook Loop Current RL = 1200Ω -21-mA
Off Hook Loop Current RL = 1200Ω, V
Off Hook Loop Current RL = 200Ω 25.5 30 34.5 mA
Switch Hook Detection Threshold SHD = V

Dial Pulse Distortion 0-5µs
Longitudinal Balance 1V

2-Wire Off Hook -65-dB
2-Wire On Hook -63-dB
Tip and Ring to TX, Off Hook -58-dB

Insertion Loss At 1kHz, 0dBm Input Level, Referenced 600Ω

2-Wire to TX, RX to 2-Wire

= 600Ω, TA = 25oC - - 5.3 mA

L

= 600Ω - - 39 mA

L

OL

SHD = V

0oC ≤ TA≤ 75oC

OH

200Hz - 3400Hz, (Note 3) IEEE Method

RMS

= -48V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters

BAT

= -42V, TA = 25oC 17.5 - - mA

BAT

10 - - mA

--5mA

- ±0.05 ±0.2 dB

Frequency Response 200 -3400Hz Referenced to Absolute Loss at1kHz and

0dBm Signal Level (Note 3)

Idle Channel Noise (Note 3)

2-Wire to TX, RX to 2-Wire

Trans Hybrid Loss
RX to TX

Overload Level, 2-Wire to TX, RX to 2-Wire VCC = +5V, (Note 3) 2.5 - - V

Balance Network Set Up for 600Ω Termination at 1kHz - 40 - dB

- ±0.02 ±0.05 dB

- 1 5 dBrnC

- -89 -85 dBm0p

51

Peak