
Features
Provides Analog Transmission Line
Interface for T1 and E1 Applications
Provides Line Driver, Jitter Attenuator
and Clock Recovery Functions
Fully Compliant with AT&T 62411
Stratum 4, Type II Jitter Requirements
Low Power Consumption
B8ZS/HDB3/AMI Encoder/Decoder
50 mA Transmitter Short-Circuit
Current Limiting
General Description
The CS61304A combines the complete analog transmit
and receive line interface for T1 or E1 applications in a
low power, 28-pin device operating from a +5V supply.
The CS61304A is a pin-compatible replacement for the
LXT304A.
The receiver uses a digital Delay-Locked-Loop which is
continuously calibrated from a crystal reference to pro-
vide excellent stability and jitter tolerance. The
CS61304A has a receiver jitter attenuator optimized for
T1 CPE applications subject to AT&T 62411 and E1
ISDN PRI applications. The transmitter features inter-
nal pulse shaping and a low impedance output stage
allowing the use of external resistors for transmitter im-
pedance matching.
Applications
Primary Rate ISDN Network/Termination Equipment
Channel Service Units
See
page 31
.
DS156PP2
1
Crystal Semiconductor Corporation
P. O. Box 17847, Austin, Texas, 78760
(512) 445-7222 FAX:(512) 445-7581
T1/E1 Line Interface
TTIP
TCLK
7
RRING
MTIP
[RCODE]
RTIP
TRING
TGND
14
CONTROL
LINE RECEIVER
LINE DRIVER
15
3
2
6
4
RCLK
8
27
LLOOP
(SCLK)
25
24
(INT)
LEN0
(SDI)
LEN1
(SDO)
LEN2
28
23
(CLKE)
TAOS
5
MODE
TPOS
[TDATA]
RPOS
[RDATA]
RNEG
[BPV]
TNEG
[TCODE]
DPM
[AIS]
LOS
12
21
RV+
22
RGND
13
19
20
17
11
18
16
MRING
[PCS]
XTALIN
9
XTALOUT
10
ACLKI
1
( ) = Pin Function in
Host Mode
[ ] = Pin Function in
Extended Hardware Mode
26
RLOOP
(CS)
R
E
M
O
T
E
L
O
O
P
B
A
C
K
AMI,
B8ZS,
HDB3,
CODER
JITTER
ATTENUATOR
L
O
C
A
L
L
O
O
P
B
A
C
K
CLOCK &
DATA
RECOVERY
SIGNAL
QUALITY
MONITOR
DRIVER
MONITOR
PULSE
SHAPER
TV+
(All Rights Reserved)
CS61304A
This document contains information for a new product. Crystal
Semiconductor reserves the right to modify this product without notice.
Preliminary Product Information
Copyright
Cirrus Logic, Inc. 2005
(All Rights Reserved)
SEP ‘05