L3234 Datasheet PDF - STMicroelectronics

DESCRIPTION
The L3234/L3235 is a highly integrated SLIC KIT targeted to PABX and key system applications
The kit integrates the majority of functions required to interface a telephone line. The L3234/L3235 implements the main features of the broths function:
- Battery Feed (Balanced Mode)
- Ringing Injection
- Signalling Detection
- Hybrid Function
The Kit comprises 2 devices, the L3234 ringing injector fabricated in Bipolar in 140V Technology.

■ HIGHLY INTEGRATED SUBSCRIBER LINE INTERFACE KIT FOR PABX AND KEY SYSTEM APPLICATIONS
■ IMPLEMENTS ALL KEY ELEMENTS OF THE BORSCHT FUNCTION
■ INTEGRATED ZERO CROSSING BALANCED
■ RINGING INJECTION ELIMINATES EXTERNAL RELAY AND CENTRALISED RINGING GENERATOR
■ ZERO NOISE INJECTED ON ADJACENT LINES DURING RINGING SEQUENCE
■ LOW POWER IN STANDBY AND ACTIVE MODES
■ BATTERY FEED WITH PROGRAMMABLE LIMITING CURRENT
■ PARALLEL LATCHED DIGITAL INTERFACE
■ SIGNALLING FUNCTIONS (OFF HOOK, GND-KEY)
■ LOW NUMBER OF EXTERNAL COMPONENTS
■ INTEGRATED THERMAL PROTECTION
■ INTEGRATED OVER CURRENT PROTECTION
■ 0°C TO 70°C: L3234/L3235
■ -40°C TO 85°C: L3234T/L3235T