CPC7691 Datasheet, PDF (1/16 Pages) Clare, Inc. – Line Card Access Switch

INTEGRATED CIRCUITS DIVISION
CPC7691
Line Card Access Switch
Features
• Improved switch dV/dt immunity of 1500V/s
• 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
• 5V 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
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Description
The CPC7691 is a member of IXYS Integrated
Circuits Division’s third-generation Line Card Access
Switch (LCAS) family. This monolithic 4-pole solid
state switch, available in a 16-pin SOIC package,
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 +5V 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 employs 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 V
DC
7 VDD
2 T_BAT
15 R_BAT
Switch
V_REF
Control
Logic
L
A
10
T
C 11
H
1
SCR Trip Circuit
F_{GND (CPC7691BA)}
16
V_BAT
9
8
D_GND
SLIC
IN_RINGING
LATCH
T_SD
DS-CPC7691-R01
www.ixysic.com
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