The DS3171 (single), DS3172 (dual), DS3173 (triple), and DS3174 (quad) perform framing, formatting, and line transmission and reception. These devices contain integrated LIU(s), framer/formatter for M23 DS3, C-bit DS3,
G.751 E3, G.832 E3, or a combination of the above signal formats.
Each LIU has independent receive and transmit paths. The receiver LIU block performs clock and data recovery
from a B3ZS- or HDB3-coded AMI signal and monitors for loss of the incoming signal, or can be bypassed for
direct clock and data inputs. The receiver LIU block optionally performs B3ZS/HDB3 decoding. The transmitter LIU
drives standard pulse-shape waveforms onto 75Ω coaxial cable or can be bypassed for direct clock and data
outputs. The jitter attenuator can be placed in either transmit or receive data path when the LIU is enabled. The
DS3/E3 framers transmit and receive serial data in properly formatted M23 DS3, C-bit DS3, G.751 E3, or G.832 E3
data streams. Unused functions can be powered down to reduce device power. The DS317x DS3/E3 SCTs
conform to the telecommunications standards listed in Section 4.
Key Features
Applications/Uses
Single (DS3171), Dual (DS3172), Triple
(DS3173), or Quad (DS3174) Single-Chip
Transceiver for DS3 and E3
All Four Devices are Pin Compatible for Ease of Port Density Migration in the Same Printed
Circuit Board Platform
Each Port Independently Configurable
Performs Receive Clock/Data Recovery and
Transmit Waveshaping for DS3 and E3
Jitter Attenuator can be Placed Either in the
Receive or Transmit Paths
Interfaces to 75Ω Coaxial Cable at Lengths Up to
380 meters, or 1246 feet (DS3) or 440 meters, or
1443 feet (E3)
Uses 1:2 Transformers on Both Tx and Rx
On-Chip DS3 (M23 or C-Bit) and E3 (G.751 or
G.832) Framer(s)
Ports Independently Configurable for DS3, E3
Built-In HDLC Controllers with 256-Byte FIFOs
for the Insertion/Extraction of DS3 PMDL, G.751
Sn Bit, and G.832 NR/GC Bytes
On-Chip BERTs for PRBS and Repetitive Pattern
Generation, Detection, and Analysis
Large Performance-Monitoring Counters for
Accumulation Intervals of at Least 1 Second
Flexible Overhead Insertion/Extraction Ports for
DS3, E3 Framers
Loopbacks Include Line, Diagnostic, Framer,
Payload, and Analog with Capabilities to Insert
AIS in the Directions Away from Loopback
Directions
Ports can be Disabled to Reduce Power
Integrated Clock Rate Adapter to Generate the
Remaining Internally Required 44.736MHz (DS3)
and 34.368MHz (E3) from a Single Clock
Reference Source at One of Three Standard
Frequencies (DS3, E3, STS-1)
Pin Compatible with the DS318x Family of
Devices and the DS316x Family of Devices
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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