DS3254 Datasheet, PDF (1/71 Pages) Dallas Semiconductor – Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs

DS3251/DS3252/DS3253/DS3254
Single/Dual/Triple/Quad
DS3/E3/STS-1 LIUs
www.maxim-ic.com
GENERAL DESCRIPTION
The DS3251 (single), DS3252 (dual), DS3253
(triple), and DS3254 (quad) line interface units (LIUs)
perform the functions necessary for interfacing at the
physical layer to DS3, E3, or STS-1 lines. Each LIU
has independent receive and transmit paths and a
built-in jitter attenuator. An on-chip clock adapter
generates all line-rate clocks from a single input
clock. Control interface options include 8-bit parallel,
SPI, and hardware mode.
APPLICATIONS
SONET/SDH and PDH Multiplexers
Digital Cross-Connects
Access Concentrators
ATM and Frame Relay Equipment
Routers
PBXs
DSLAMs
CSU/DSUs
FUNCTIONAL DIAGRAM
LINE IN
DS3, E3,
OR STS-1
LINE OUT
DS3, E3,
OR STS-1
EACH LIU
RXP
RXN
CLK
DATA
Dallas
Semiconductor
DS325x
TXP
TXN
CLK
DATA
RECEIVE
CLOCK
AND DATA
CONTROL
STATUS
TRANSMIT
CLOCK
AND DATA
FEATURES
§ Pin-Compatible Family of Products
§ Each Port Independently Configurable
§ Receive Clock and Data Recovery for Up to 380
meters (DS3), 440 meters (E3), or 360 meters
(STS-1) of 75W Coaxial Cable
§ Standards-Compliant Transmit Waveshaping
§ Three Control Interface Options: 8-Bit Parallel,
SPI, and Hardware Mode
§ Built-In Jitter Attenuators can be Placed in Either
the Receive or Transmit Paths
§ Jitter Attenuators Have Provisionable Buffer
Depth: 16, 32, 64, or 128 Bits
§ Built-In Clock Adapter Generates All Line-Rate
Clocks from a Single Input Clock (DS3, E3,
STS-1, OC-3, 19.44MHz, 38.88MHz,
77.76MHz)
§ B3ZS/HDB3 Encoding and Decoding
§ Minimal External Components Required
§ Local and Remote Loopbacks
§ Low-Power 3.3V Operation (5V Tolerant I/O)
§ Industrial Temperature Range: -40°C to +85°C
§ Small Package: 144-Pin, 13mm x 13mm
Thermally Enhanced CSBGA
§ Drop-In Replacement for DS3151/52/53/54 LIUs
§ IEEE 1149.1 JTAG Support
Features continued on page 5.
ORDERING INFORMATION
PART LIU TEMP RANGE PIN-PACKAGE
DS3251
DS3251N
DS3252
DS3252N
DS3253
DS3253N
DS3254
DS3254N
1 0°C to +70°C 144 TE-CSBGA
1 -40°C to +85°C 144 TE-CSBGA
2 0°C to +70°C 144 TE-CSBGA
2 -40°C to +85°C 144 TE-CSBGA
3 0°C to +70°C 144 TE-CSBGA
3 -40°C to +85°C 144 TE-CSBGA
4 0°C to +70°C 144 TE-CSBGA
4 -40°C to +85°C 144 TE-CSBGA
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
1 of 71
REV: 061705