CPC7594
Line Card Access Switch
Features
Description
• TTL logic level inputs for 3.3V logic interfaces
• Smart logic for power up / hot plug state control
• Small 16-pin SOIC or Micro-Leadframe Package
• MLP package printed-circuit board footprint is 60
percent smaller than the SOIC version, 70 percent
The CPC7594 is a member of Clare’s next generation
Line Card Access Switch family. This monolithic 6-pole
solid-state switch is available in either a 16-pin SOIC
or a 16-pin MLP package. It provides the necessary
functions to replace two 2-Form-C electro-mechanical
relays used on traditional analog and contemporary
integrated voice and data (IVD) line cards found in
Central Office, Access, and PBX equipment. Because
this device contains solid state switches for tip and ring
line break, ringing injection/return and channel test
access, it requires only a +5V supply for operation and
TTL logic-level inputs for control.
th
smaller than 4 generation EMR solutions.
• Monolithic IC reliability
• Low matched R
• Eliminates the need for zero cross switching
• Flexible switch timing to transition from ringing mode
to talk mode.
ON
• Clean, bounce-free switching
The CPC7594 is particularly designed for IVD line
cards where an EMR is required for line test due to the
high frequencies typical of ADSL but solid-state
switches are desired for switching and test-in
functions.
• Tertiary protection consisting of integrated current
limiting, voltage clamping, and thermal shutdown for
SLIC protection
• 5 V operation with power consumption < 10 mW
• Intelligent battery monitor
• Latched logic-level inputs, no external drive circuitry
required
The CPC7594xC logic differs from the CPC7594xA/B
logic by providing a monitor function during the test
state.
Applications
• VoIP Gateways
Ordering Information
Specify CPC7594Bx for the SOIC package (47/tube)
or CPC7594Mx for the MLP (94/tube). Add “TR”, sans
quotes, to the part number for tape and reel
packaging. SOIC: 1000/reel or MLP: 2000/reel.
• 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
Part Number Description
CPC7594xA
CPC7594xB
6-pole LCAS with protection SCR in tubes
6-pole LCAS without protection SCR in tubes
• Channel Banks
6-pole LCAS with protection SCR and “Monitor”
test state in tubes
CPC7594xC
Figure 1. CPC7594 Block Diagram
TTEST (TCHANTEST
)
+5VDC
TRINGING
V
5
1
6
DD
CPC7594
SW3
SW5
X
X
X
Tip
TBAT
TLINE
3
4
X
SW1
Secondary
Protection
SLIC
Ring
SXW2
R
LINE13
RBAT
14
9
L
A
T
C
H
SW4
SW6
INTEST
X
Switch
Control
Logic
10
VREF
INRINGING
LATCH
11
VBAT
12 RRINGING
6
2
FGND
15
VBAT
8
7
SCR Trip Circuit
(CPC7594xA/C)
DGND
TSD
300Ω
(min.)
RINGING
RTEST (RCHANTEST
)
DS-CPC7594 - R01.1
www.clare.com
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