HC-5509A1

Features:

• DI Monolithic High Voltage Process
• Compatible with Worldwide PBX and CO Performance Requirements
• Controlled Supply of Battery Feed Current with Programmable Current Limit
• Operates with 5V Positive Supply (VB+)
• 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


Application

• 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


Pinout




Specifications

Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . -0.5V to +15V
Maximum Supply Voltages
(VB+) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
(VB+)-(VB-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +75V
Junction Temperature Ceramic . . . . . . . . . . . . . . . . . . . . . . +175
Junction Temperature Plastic. . . . . . . . . . . . . . . . . . . . . . . . +150
Lead Temperature (Soldering 10 Sec.) . . . . . . . . . . . . . . . . +300


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 functions 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 HC-5509A1 SLIC also maintains specified transmission performance in the presence of externally induced longitudinal currents. The BORSCHT functions that the HC-5509A1 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 HC-5509A1 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 output and line fault protection. Switch hook detection, ring trip detection and ground key detection functions are also incorporated in the SLIC device.

The HC-5509A1 SLIC is ideally suited for line card designs in PBX and CO systems, replacing traditional transformer solutions.