Rainbow Electronics DS2154 - Manual

E Copyright 1997 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
DS2154
Enhanced E1 Single Chip Transceiver
DS2154
PRELIMINARY
031197 1/69
FEATURES
•
Complete E1(CEPT) PCM–30/ISDN–PRI transceiver
functionality
•
Onboard long and short haul line interface for clock/
data recovery and waveshaping
•
32–bit or 128–bit crystal–less jitter attenuator
•
Generates line build outs for both 120
Ω
and 75
Ω
lines
•
Frames to FAS, CAS, and CRC4 formats
•
Dual onboard two–frame elastic store slip buffers that
can connect to asynchronous backplanes up to
8.192 MHz
•
8–bit parallel control port that can be used directly on
either multiplexed or non–multiplexed buses
•
Extracts and inserts CAS signaling
•
Detects and generates Remote and AIS alarms
•
Programmable output clocks for Fractional E1, H0,
and H12 applications
•
Fully independent transmit and receive functionality
•
Full access to both Si and Sa bits aligned with CRC
multiframe
•
Four separate loopbacks for testing functions
•
Large counters for bipolar and code violations, CRC4
codeword errors, FAS errors, and E bits
•
Pin compatible with DS2152 T1 Enhanced Single–
Chip Transceiver
•
5V supply; low power CMOS
•
100–pin 14mm 2 body LQFP package
PACKAGE OUTLINE
100
1
ORDERING INFORMATION
DS2154L (0
°
C to 70
°
C)
DS2154LN (–40
°
C to +85
°
C)
DESCRIPTION
The DS2154 Enhanced Single–Chip Transceiver
(ESCT) contains all of the necessary functions for con-
nection to E1 lines. The device is an upward compatible
version of the DS2153 Single–Chip Transceiver. The
onboard clock/data recovery circuitry coverts the AMI/ HDB3 E1 waveforms to a NRZ serial stream. The
DS2154 automatically adjusts to E1 22AWG (0.6 mm)
twisted–pair cables from 0 to over 2km in length. The
device can generate the necessary G.703 waveshapes
for both 75 ohm coax and 120 ohm twisted cables. The