Not for New Designs
CPC7581
Line Card Access Switch
Features
•
Small 16-pin SOIC or DFN package
•
DFN package printed-circuit board footprint is 60
percent smaller than the SOIC version, 40 percent
smaller than fourth generation EMR solutions.
•
Monolithic IC reliability
•
Low, matched R
ON
•
Eliminates the need for zero-cross switching
•
Flexible switch timing for transition from ringing
mode to idle/talk mode.
•
Clean, bounce-free switching
•
Tertiary protection consisting of integrated current
limiting, thermal shutdown for SLIC protection
•
5 V operation with power consumption < 10 mW
•
Intelligent battery monitor
•
Latched logic-level inputs, no external drive circuitry
required
•
SOIC package pin-compatible with Legerity product
Description
The CPC7581 is a monolithic solid-state four-pole
switch in a 16-pin package. It provides the necessary
functions to replace a 2-Form-C electromechanical
relay on traditional analog and integrated voice and
data (IVD) line cards found in central office, access, and
PBX equipment. The CPC7581 contains solid-state
switches for tip and ring lead line break and ringing
injection/ringing return. The device requires only a +5 V
supply and offers break-before-make and
make-before-break operation using logic-level inputs.
The CPC7581xA versions include an SCR that
provides protection to the SLIC and subsequent
circuitry during a fault condition. The CPC7581xC
versions are functionally identical to the CPC7581xA
versions, but with higher SCR hold current.
Applications
•
•
•
•
•
•
•
•
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
Ordering Information
CPC7581 part numbers are specified as shown here:
B - 16-pin SOIC delivered 50/Tube, 1000/Reel
M - 16-pin DFN delivered 52/Tube, 1000/Reel
CPC7581 x x xx
TR - Add for Tape & Reel
Version
A -
With
Protection SCR
B -
Without
Protection SCR
C -
With
Protection SCR and higher SCR hold current
Figure 1. CPC7581 Block Diagram
+5 Vdc
6 T
RING
7 V
DD
Tip
Secondary
Protection
T
LINE
3
X
SW3
SW1
CPC7581
2 T
BAT
X
SLIC
R
LINE
14
SW2
15 R
BAT
SCR and
Trip Circuit
(CPC7581xA/C)
V
REF
Switch
Control
Logic
L
A
T
C
H
8
T
SD
Ring
X
X
SW4
10
11
IN
RINGING
LATCH
12
300
Ω
(min.)
1
F
GND
16
V
BAT
9
D
GND
V
BAT
RINGING
Pb
RoHS
2002/95/EC
e
3
1
DS-CPC7581-R05
www.clare.com
CLARE [ CLARE, INC. ]
