Line Card Access Switch
Features
•
Improved switch dV/dt immunity of 1500 V/μs
•
Drop-In Replacement for CPC7591
•
Replaces CPC7581, and allows removal of
power-up control discrete components
•
TTL logic level inputs for 3.3V logic interfaces
•
Smart logic for power up / hot plug state control
•
Small 16-pin SOIC package
•
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, voltage clamping, and thermal shutdown for
SLIC protection
•
5 V operation with power consumption < 10.5 mW
•
Intelligent battery monitor
•
Latched logic-level inputs, no external drive circuitry
CPC7691
Description
The CPC7691 is a member of Clare’s third-generation
Line Card Access Switch (LCAS) family. This
monolithic 4-pole solid state switch is available in a
16-pin SOIC package. It provides the necessary
functions to replace the 2-Form-C electromechanical
ringing relay and it’s associated snubber circuitry on
traditional analog line cards or contemporary
integrated voice and data (IVD) line cards found in
Central Office (CO), Access, and PBX equipment.
Because this device contains solid state switches for
tip and ring line break and for ringing injection/return, it
requires only a +5 V supply for operation and TTL
logic-level inputs for control. The CPC7691 provides
stable start-up conditioning during system power up
and for hot plug insertion applications. Once active,
the inputs respond to traditional TTL logic levels,
enabling the CPC7691 to be used with 3.3V-only logic.
For negative transient voltage protection the
CPC7691BA version includes SCRs to provide
voltage fold-back protection for the SLIC and
subsequent circuitry, while the CPC7691BB version
utilizes clamping diodes to the V
BAT
pin. For positive
transient voltage protection all versions provide
clamping diodes to the F
GND
pin.
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
Ordering Information
Device
CPC7691BA
CPC7691BATR
CPC7691BB
CPC7691BBTR
Description
With Protection SCR, in Tubes (50/Tube)
With Protection SCR, Tape & Reel (1000/Reel)
Without Protection SCR, in Tubes (50/Tube)
Without Protection SCR, Tape & Reel (1000/Reel)
Pb
RoHS
2002/95/EC
e
3
6 T
RINGING
SW3
SW1
Figure 1. CPC7691 Block Diagram
+5
Vdc
7
V
DD
CPC7691
2 T
BAT
Tip
Secondary
Protection
T
LINE
3
X
X
SLIC
R
LINE
14
SW2
15 R
BAT
L
A
T
C
H
8
T
SD
Ring
X
X
SW4
V
REF
Switch
Control
Logic
10
11
IN
RINGING
LATCH
12 R
RINGING
V
BAT
300
Ω
(min.)
RINGING
1
F
GND
SCR Trip Circuit
(CPC7691xA)
16
V
BAT
9
D
GND
DS-CPC7691 - R00E
PRELIMINARY
1
CLARE [ CLARE, INC. ]
