CPC75282
Line Card Access Switch
Features
Description
• 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
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.
• Low, matched R
ON
• Eliminates the need for zero-cross switching
• Flexible switch timing to transition from ringing mode
to talk mode.
The CPC75282 Dual LCAS device is designed to
provide ringing and test access to the telephone loop
in Central Office, Digitally Added Main Line, Private
Branch Exchange, Digital Loop Carrier, and Hybrid
Fiber Coax/Fiber-In-The-Loop analog line card
applications. Test access switches provide access to
the telephone loop for line (drop) test or message
waiting in the PBX application.
• 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
Ordering Information
Applications
• VoIP Gateways
Part #
Description
• Central Office (CO)
• Digital Loop Carrier (DLC)
• PBX Systems
CPC75282KATR 44-Pin TQFP, Tape & Reel (1000/Reel)
• Digitally Added Main Line (DAML)
• Hybrid Fiber Coax (HFC)
• Fiber In The Loop (FITL)
• Pair Gain System
• Channel Banks
Figure 1. CPC75282 Block Diagram
VDD
9,25
TTEST1 37
1/2 - CPC75282
38
(Channel 1)
TRINGING1
SW5
SW3
X
X
X
X
TBAT1
36
21
TLINE1
X
SW1
Battery
Monitor
SW2
22
14
RLINE1 34
RBAT1
X
SW6
SW4
P1
RRINGING1 30
L
A
T
C
H
CH1
CH2
15 P2
16
17 LATCH1
18
P3
33
RTEST1
Switch
Control
Logic
LATCH2
28 TSD1
6
TSD2
OFF1
OFF2
19
20
RoHS
2002/95/EC
27
FGND1
24
11,23
DGND
8,26
VBAT
Pb
e3
CFG
DS-CPC75282 - R00D
www.clare.com
1