CPC7691 Datasheet, PDF (1/17 Pages) Clare, Inc. – Line Card Access Switch

CPC7691
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
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
Pb
RoHS
2002/95/EC
e3
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.
Ordering Information
Device
Description
CPC7691BA With Protection SCR, in Tubes (50/Tube)
CPC7691BATR With Protection SCR, Tape & Reel (1000/Reel)
CPC7691BB Without Protection SCR, in Tubes (50/Tube)
CPC7691BBTR Without Protection SCR, Tape & Reel (1000/Reel)
Figure 1. CPC7691 Block Diagram
Tip
Ring
T 3 _LINE
Secondary
Protection
R_LINE 14
6 TRINGING
SW3
X
X
SW1
SW2
X
X
SW4
V_BAT
12 R_RINGING
300Ω
(min.)
RINGING
CPC7691
+5 Vdc
7 VDD
2 T_BAT
Switch
V_REF
Control
Logic
1
SCR Trip Circuit
F_{GND (CPC7691xA)}
16
V_BAT
9
8
D_GND
15 R_BAT
L
A
10
T
C 11
H
SLIC
IN_RINGING
LATCH
T_SD
DS-CPC7691 - R00E
PRELIMINARY
1