DS3251+ Maxim Integrated Products, DS3251+ Datasheet
![IC LIU DS3/E3/STS-1 144-CSBGA](/photos/6/82/68286/144-csbga_pkg_sml.jpg)
DS3251+
Manufacturer Part Number
DS3251+
Description
IC LIU DS3/E3/STS-1 144-CSBGA
Manufacturer
Maxim Integrated Products
Type
Line Interface Units (LIUs)r
Specifications of DS3251+
Number Of Drivers/receivers
1/1
Protocol
DS3
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
144-CSBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
+
GENERAL DESCRIPTION
The DS32506 (6 port), DS32508 (8 port), and
DS32512 (12 port) line interface units (LIUs) are
highly integrated, low-power, feature-rich LIUs for
DS3, E3, and STS-1 applications. Each LIU port in
these devices has independent receive and transmit
paths,
generator
counters, and a complete set of loopbacks. An on-
chip clock adapter generates all line-rate clocks from
a single input clock. Ports are independently software
configurable for DS3, E3, and STS-1 and can be
individually powered down. Control interface options
include 8-bit parallel, SPI, and hardware mode.
APPLICATIONS
FUNCTIONAL DIAGRAM
SONET/SDH and PDH
Multiplexers
ATM and Frame Relay
Equipment
WAN Routers and
Switches
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.
www.maxim-ic.com
OR STS-1
LINE OUT
OR STS-1
DS3, E3,
DS3, E3,
LINE IN
a
and
jitter
TXP
TXN
RXP
RXN
detector,
Semiconductor
attenuator,
EACH LIU
DS325xx
Dallas
DATA
DATA
CLK
CLK
performance-monitoring
Digital Cross-
Connects
Access Concentrators
CSUs/DSUs
PBXs
DSLAMs
full-featured
AND DATA
TRANSMIT
AND DATA
CONTROL
RECEIVE
STATUS
CLOCK
CLOCK
AND
pattern
1 of 130
6-/8-/12-Port DS3/E3/STS-1 LIU
FEATURES
ORDERING INFORMATION
Note: Add the “+” suffix for the lead-free package option.
DS32506/DS32508/DS32512
DS32506
DS32506N
DS32508
DS32508N
DS32512
DS32512N
PART
Pin-Compatible Family of Products
Each Port Independently Configurable
Receive Clock and Data Recovery for Up to 457
meters (1500 feet) of 75Ω Coaxial Cable
Standards-Compliant Transmit Waveshaping
Uses 1:1 Transformers on Both Tx and Rx
Three Control Interface Options: 8/16-Bit
Parallel, SPI, and Hardware Mode
Jitter Attenuators (One Per Port) Can be Placed
in the Receive Path or the Transmit Path
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,
12.8MHz, 19.44MHz, 38.88MHz, 77.76MHz)
Per-Port Programmable Internal Line Termination
Requiring Only External Transformers
High-Impedance Tx and Rx, Even When V
Enables Hot-Swappable, 1:1 and 1+1 Board
Redundancy Without Relays
Per-Port BERT for PRBS and Repetitive Pattern
Generation and Detection
Tx and Rx Open and Short Detection Circuitry
Transmit Driver Monitor Circuitry
Receive Loss-of-Signal (LOS) Monitoring
Compliant with ANSI T1.231 and ITU G.775
Automatic Data Squelching on Receive LOS
Large Line Code Performance-Monitoring
Counters for Accumulation Intervals Up to 1s
Local and Remote Loopbacks
Transmit Common Clock Option
Power-Down Capability for Unused Ports
Low-Power 1.8V/3.3V Operation (5V Tolerant
I/O)
Industrial Temperature Range: -40°C to +85°C
Small Package: 23mm x 23mm, 484-Pin BGA
IEEE 1149.1 JTAG Support
LIUs
12
12
6
6
8
8
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
484 BGA
484 BGA
484 BGA
PIN-
PACKAGE
484 BGA
484 BGA
484 BGA
REV: 062906
DD
= 0,