CS61310
T1 Line Interface Unit
Features
Description
The CS61310 is a T1 primary rate line interface unit. It
combines the complete analog transmit-and-receive cir-
cuitry for a single, full-duplex interface at T1 rates. The
device is pin- and function-compatible with the Level
One LXT310.
Provides T1 line interface
No crystal needed for jitter attenuation
Greater than 14 dB of transmit return loss
Meets AT&T 62411 jitter tolerance and
attenuation requirements
Meets ANSI T1.231B requirements for LOS and
AIS
AWG for user programmable pulse shapes
TX driver high impedance / low power control
Generation and detection of loop up / loop down
signaling
Enhanced functionality is available through an extended
register set, allowing custom pulse shape generation as
well as generation and detection of loop up and loop
down codes. The CS61310 features crystal-less jitter
attenuation.
Selectable unipolar or bipolar I/O
Compliant with:
— American National Standards (ANSI): T1.102, T1.105,
T1.403, T1.408, and T1.231
— FCC Rules and Regulations: Part 68 and Part 15
— AT&T Publication 62411
— TR-NET-00499
ORDERING INFORMATION
CS61310-IL
28-pin PLCC
E
N
2
TCLK
PULSE
13
C
O
D
E
R
TRANSMIT
TIMING &
CONTROL
SHAPING
CIRCUITRY
ROM / RAM
3
4
JITTER
ATTEN
TTIP
TDATA/TPOS
UBS/TNEG
LINE DRIVERS
16
TRING
28
26
27
24
25
CLKE/TAOS
CS/RLOOP
SCLK/LLOOP
SDI/LBO1
11
JASEL
SERIAL
PORT
TAOS Enable
LBO Select
LOCAL
REMOTE
LOOPBACK
(DIGITAL)
REGISTERS & CONTROL LOGIC
SDO/LBO2
LOOPBACK
LOS/
NLOOP
LLOOP
Enable
LOCAL
Clear
LOOPBACK
(ANALOG)
D
E
C
O
D
E
R
EQUALIZER
CONTROL
18
8
7
6
LATN
RCLK
RDATA/RPOS
BPV/RNEG
TIMING
JITTER
ATTEN
& DATA
RECOVERY
19
20
SLICERS
& PEAK
DETECT
NOISE &
CROSSTALK
FILTERS
RTIP
MAGNITUDE
EQUALIZER
AGC
RRING
RECEIVE
CLOCK
GENERATOR
INBAND
NLOOP
& LOS
23
12
1
INT/NLOOP
LOS
MCLK
PROCESSOR
9
10
5
21
22
14
15
TV+
XTALIN
XTALOUT
MODE RV+ RGND TGND
This document contains advanced information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Final Product Information
Cirrus Logic, Inc.
http://www.cirrus.com
DS440F1
FEB ‘03
Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
1