CPC7591_12 Datasheet, PDF (1/17 Pages) IXYS Corporation – Line Card Access Switch

INTEGRATED CIRCUITS DIVISION
CPC7591
Line Card Access Switch
Features
• TTL Logic Level Inputs for 3.3V Logic Interfaces
• Smart Logic for Power Up / Hot Plug State Control
• Improved Switch dV/dt Immunity of 500 V/s
• 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 mW
• Intelligent Battery Monitor
• Latched Logic-Level Inputs, no External Drive
Circuitry
• Small 16-pin SOIC
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
Description
The CPC7591 is a member of IXYS Integrated
Circuits Division’s next 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
CPC7591 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 CPC7591 to
be used with 3.3V-only logic.
For negative transient voltage protection the
CPC7591BA version includes SCRs to provide
voltage fold-back protection for the SLIC and
subsequent circuitry, while the CPC7591BB 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
Pb
e3
Part #
Description
CPC7591BA
CPC7591BATR
CPC7591BB
CPC7591BBTR
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
Figure 1. CPC7591 Block Diagram
+5 Vdc
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
CPC7591
7 VDD
2 T_BAT
Switch
V_REF
Control
Logic
1
SCR Trip Circuit
F_GND
(CPC7591BA)
16
V_BAT
9
8
D_GND
15 R_BAT
L
A
10
T
C 11
H
SLIC
IN_RINGING
LATCH
T_SD
DS-CPC7591-R06
www.ixysic.com
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