Features
•• Unique Clock-Tracking Circuitry Filters
50 Hz or Higher Frequency Jitter for
T1 and PCM-30 Applications
•• Minimal External Components Required
•• 14 Pin DIP
•• Single 5 Volt Supply
•• 3 Micron CMOS for High Reliability
and Low Power Dissipation: 50 mW
Typical at 25
°C
General Description
The CS61600 from Crystal Semiconductor accepts T1
(1.544 Mb/s) or CCITT standard (2.048 Mb/s) data and
clock inputs, and tolerates at least 7 (and up to 14) unit
intervals, peak-to-peak, of jitter. Before outputting data
and clock, jitter is attenuated using an internal clock-
tracking variable oscillator and a 16 bit FIFO elastic
store.
The jitter attenuation function can be determined by
appropriate specification of the external crystal.
The CS61600 is transparent to data format, and is in-
tended for application in carrier systems, switching
systems, Local Area Network gateways and multiplex-
ers.
ORDERING INFORMATION
CS61600-IP1
-
14 Pin Plastic DIP; T1 and 2.048 MHz
APR ’90
DS9F3
1
Crystal Semiconductor Corporation
P.O. Box 17847, Austin, TX 78760
(512) 445-7222 FAX: (512) 445-7581
PCM Jitter Attenuator
Semiconductor Corporation
CS61600
16-BIT FIFO
VARIABLE OSCILLATOR
4
13
8
XTALIN
CLKIN
DIN
FIFO CONTROL
23
1
FIFORST
OVR
RESET
HALF FULL
DETECT
OSCOUT
5
XTALOUT
11
10
6
CLKOUT
ARE
14
7
GND
V+
12
ARC
9
DOUT
÷4
Copyright
© Crystal Semicondutor Corporation 1994
(All Rights Reserved)
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