CPC7508 Datasheet, PDF (1/14 Pages) Clare, Inc. – Line Card Access Switch

CPC7508
Line Card Access Switch
Features
• TTL logic level inputs for 3.3V logic interfaces
• Smart logic for power up / hot plug state control
• Monolithic IC reliability
• Low matched R_ON
• Clean, bounce-free switching
• Tertiary protection consisting of integrated current
limiting and thermal shutdown for SLIC protection
• +12.5V operation with power consumption ≤25mW
• Latched logic level inputs, no external drive circuitry
required
• Small 16-pin SOIC
Applications
• Fiber to the Home (FTTH)
• Fiber in the Loop (FITL)
• VoIP Gateways
• PBX Systems
• Digitally Added Main Line (DAML)
• Hybrid Fiber Coax (HFC)
Description
The CPC7508 is a member of Clare’s next generation
Line Card Access Switch family. When used with
ringing SLICs it provides the necessary functions to
replace the two 2-Form-C electromechanical test
relays used in contemporary Fiber To The Home
(FTTH) and Optical Network Unit (ONU) deployments
as well as Voice over IP (VoIP) telephony terminals.
Solid state switches provide the mechanism for tip and
ring line break, drop test, and channel test while
requiring only a single +12V supply for operation.
Interface compatibility with 3.3V or 5V logic for switch
state control is provided by the TTL logic level inputs.
The CPC7508 is designed for fiber access units where
EMR’s are used for test access and line monitoring
functions but solid-state switches are desired due to
reduced operating noise, lower power consumption
and longer lifetimes.
This monolithic 8-pole solid-state switch is available in
a 16-pin SOIC package.
Ordering Information
Part Number Description
CPC7508B 8-pole LCAS, 16-pin SOIC in tubes (50/tube)
CPC7508BTR 8-pole LCAS, 16-pin SOIC in reels (1000/reel)
Figure 1. CPC7508 Block Diagram
Tip
Ring
T (T ) _{TEST_IN}
CHAN_TEST
CPC7508
T (T ) _{TEST_OUT}
DROP_TEST
7
X
SW7
T 6 _LINE
Secondary
Protection
R_{LINE 11}
XSW3
X
SW1
SW2
X
X SW4
SW8
X
8
X SW5
X SW6
+12V_DC
1 VDD
Switch
Control
Logic
5 T_BAT
12 R_BAT
Ringing
SLIC
16
L
A 15
T
C
14
H 13
IN_A
IN_B
IN_C
LATCH
R (R ) _{TEST_OUT}
10
DROP_TEST
9
2
3
GND
T_SD
R (R ) _{TEST_IN}
CHAN_TEST
Pb
RoHS
2002/95/EC
e3
DS-CPC7508 - R04
www.clare.com
1