Line Card Access Switch
CPC75282
Line Card Access Switch
Features
• Improved Switch dV/dt Immunity of 1500V/μs • Smart logic for power-up/hot-p...
Description
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...
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