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MFG:Dallas  Package Cooled:CSBGA  D/C:8  

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Part Number: DS21458

 

MFG: Dallas

Package Cooled: CSBGA

D/C: 8

Description: The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configur...


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DS21458 General Description


The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configured for T1, E1, or J1 operation. Each is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via an 8-bit parallel port configured for Intel or Motorola bus operations. The DS21455* is a direct replacement for the older DS21Q55 quad MCM device. The DS21458, in a smaller package (17mm CSBGA) and featuring an improved controller interface, is softwarecompatible with the older DS21Q55.

DS21458 Maximum Ratings

Voltage Range on Any Pin Relative to Ground....................-1.0V to +6.0V 
Operating Temperature Range for DS21455/DS21458..........0 to +70
Operating Temperature Range for DS21455N/DS21458N...-40 to +85 
Storage Temperature Range..............................................-55 to +125 
Soldering Temperature ......................................See IPC/JEDEC J-STD-20A 
 

DS21458 Features

Complete T1 (DS1)/ISDN-PRI/J1 Transceiver Functionality
Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality
Short- and Long-Haul Line Interface for Clock/Data Recovery and Waveshaping
CMI Coder/Decoder
Crystal-Less Jitter Attenuator
Fully Independent Transmit and Receive Functionality 
Dual HDLC Controllers
On-Chip Programmable BERT Generator and Detector
Internal Software-Selectable Receive- and Transmit-Side Termination Resistors for 75Ω/100Ω/120Ω T1 and E1
Interfaces
Dual Two-Frame Elastic-Store Slip
Buffers that can Connect to
Asynchronous Backplanes Up to 16.384MHz
16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz Clock Output Synthesized to Recovered Network Clock
Programmable Output Clocks for Fractional T1, E1, H0, and H12 Applications
Interleaving PCM Bus Operation
8-Bit Parallel Control Port, Multiplexed or Nonmultiplexed, Intel or Motorola
IEEE 1149.1 JTAG-Boundary Scan
3.3V Supply with 5V Tolerant Inputs and Outputs
DS21455 Directly Replaces DS21Q55
Signaling System 7 (SS7) Support
RAI-CI, AIS-CI Support

DS21458 Typical Application

Routers Channel Service Units (CSUs) Data Service Units (DSUs) Muxes Switches Channel Banks T1/E1 Test Equipment

DS21458 datasheet

DS21458
PDF/DataSheet Download

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