CPC7581 Datasheet, PDF (1/15 Pages) Clare, Inc. – Line Card Access Switch

INTEGRATED CIRCUITS DIVISION
CPC7581
Line Card Access Switch
Features
• Low, Matched R_ON
• Eliminates the Need for Zero-Cross Switching
• 5V Operation With Power Consumption < 10 mW
• 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
• Intelligent Battery Monitor
• Latched Logic-Level Inputs, No External Drive
Circuitry Required
• SOIC Package Pin-Compatible With Legerity
Product
• Small 16-pin SOIC Package
• Monolithic IC reliability
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
Figure 1. CPC7581 Block Diagram
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 CPC7581BA versions include an SCR that
provides protection to the SLIC and subsequent
circuitry during a fault condition.
Ordering Information
Part #
Description
CPC7581BA
CPC7581BATR
CPC7581BB
CPC7581BBTR
16-Pin SOIC, with Protection SCR, 50/Tube
16-Pin SOIC, with Protection SCR, 1000/Reel
16-Pin SOIC, without Protection SCR, 50/Tube
16-Pin SOIC, without Protection SCR, 1000/Reel
Not for New Designs
+5 Vdc
Tip
Ring
T 3 _LINE
Secondary
Protection
R_LINE 14
V_BAT
6 ^TRING
SW3
X
X
SW1
CPC7581
7 VDD
2 T_BAT
SW2
X
SW4
X
SCR and
Trip Circuit
CPC7581BA)
12
300Ω
1
F_GND
(min.)
V_REF
Switch
Control
Logic
16
V_BAT
9
8
D_GND
15 R_BAT
L
A
10
T
C 11
H
RINGING
SLIC
IN_RINGING
LATCH
T_SD
Pb
e3
DS-CPC7581-R06
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