
Features
Monolithic T1 Framing Device
Both Framers Support SF(D4
) and
ESF Framing Formats
CS62180B Supports SLC-96
and
T1DM Framing Formats
CS62180B Contains Updated AIS and
Carrier Loss Detection Criteria
CS62180B is Pin Compatible with
CS62180A, DS2180A, and DS2180
General Description
The CS62180A and CS62180B are monolithic CMOS
devices which encode and decode T1 framing formats.
The devices support bit-seven and B8ZS zero suppres-
sion, and bit-robbed signaling. Clear channel mode can
be selected on a per channel basis.
The serial interface has been enhanced to allow the
CS62180A and CS62180B to share a chip select sig-
nal and register address space with the CS61535A,
CS61574A, and CS61575 Line Interface Units.
Applications
T1 Line Cards
ISDN Primary Rate Line Cards
Ordering Information:
CS62180A-IP 40 Pin Plastic DIP
CS62180A-IL 44 Pin PLCC
CS62180B-IP 40 Pin Plastic DIP
CS62180B-IL 44 Pin PLCC
-40 to 85
°
C
-40 to 85
°
C
-40 to 85
°
C
-40 to 85
°
C
MAY’96
DS225PP1
1
Crystal Semiconductor Corporation
P.O. Box 17847, Austin, TX 78760
(512) 445-7222 FAX: (512) 445-7581
T1 Framer
CS62180A
CS62180B
Serial
Interface
Registers
Control
VDD
VSS
TEST
TSER TABCD
5
TSIGSEL
TMO
TCHCLK
TSIGFR
TPOS
TNEG
TMSYNC
TFSYNC
Transmit Timing
Data
Selector
F-Bit Data
Yellow Alarm
Bipolar
Coder
Transmitter
Data
DeMUX
Synchronizer
RLOS
RBV
RCL
RPOS
RNEG
RFER
RCLK
RMSYNC RFSYNC
Code Gen.
Receive Sync
Controller
CRC
Receiver
Receive
Timing
Bipolar
Decoder
SCLK
SDI
SDO
SPS
RSER
RABCD
RLINK
RLCLK
RSIGFR
RSIGSEL
RCHCLK
TCLK
TLCLK
TLINK
CS
INT
RST
3
11
10
28
27
39
37
36
34
35
38
24
7
6
4
8
12
13
40
20
33
32
1
2
9
14
17
18
15
16
19
26
29
22
23
30
31
25
Alarm
Detect
RYEL
21
RBL (CS2180B-IL only)
CRC
Copyright
Crystal Semiconductor Corporation 1996
(All Rights Reserved)