CPC75282

CPC75282 Line Card Access Switch Features Improved Switch dV/dt Immunity of 1500V/μs Smart logic for power-up/hot-plug state control Small 44-pin TQFP Package Monolithic IC reliability Low, matched RON Eliminates the need for zero-cross switching Flexible switch timing to transition from ringing mode to talk mode. Clean, bounce-free switching Tertiary protection consisting of integrated current limiting, voltage clamping, and thermal shutdown for SLIC protection 5V operation with very low power consumption Intelligent battery monitor Latched logic-level inputs, no external drive circuitry required Applications VoIP Gateways Central Office (CO) Digital Loop Carrier (DLC) PBX Systems Digitally Added Main Line (DAML) Hybrid Fiber Coax (HFC) Fiber In The Loop (FITL) Pair Gain System Channel Banks Figure 1. CPC75282 Block Diagram TTEST1 37 TRINGING1 38 SW3 X TLINE1 36 RLINE1 34 SW4 X RRINGING1 30 RTEST1 33 X SW5 X SW1 SW2 X X SW6 1/2 - CPC75282 (Channel 1) Battery Monitor CH1 CH2 Switch Control Logic 27 FGND1 8,26 VBAT 24 CFG Description The CPC75282 Dual Line Card Access Switch (LCAS), a member of Clare’s next generation Line Card Access Switch family, is a monolithic solid state device that provides the switching functionality of four 2-Form-C relays in a single, small, economical package. The CPC75282 Dual LCAS device is designed to provide ringing and test access to the telephone loop in Central Office, Digitally Added Main L...