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DS21455, DS21458
Quad T1/E1/J1 Transceivers
Industry's First 4-Port Transceivers to Switch Among All T1, E1, and J1 Standards without External Component Changes
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Status
| Part Number |
Status |
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DS21455
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Active: In Production. |
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DS21458
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Active: In Production. See Ordering Information for details. |
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 software compatible
with the older DS21Q55.
*The JTAG function on the DS21455/DS21458 is a single
controller for all four transceivers, unlike the DS21Q55, which has
a JTAG controller-per-transceiver architecture.
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Data Sheet
Errata DS21455 21455_458A2.pdfErrata DS21458 21455_458A2.pdf
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An evaluation kit is available: DS21458DK
Key Features
Four Independent Transceivers, Each Having the Following 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
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Applications/Uses
- Channel Banks
- Channel Service Units (CSUs)
- Data Service Units (DSUs)
- Muxes
- Routers
- Switches
- T1/E1 Test Equipment
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Key Specifications:
| T/E Carrier & Packetized Products |
| Part Number |
Transmission Standard |
Functions |
Channels |
VSUPPLY
(V) |
EV Kit |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| DS21455 |
T1/E1/J1 |
Framer + LIU |
4 |
3.3 |
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729 |
$41.19 @1k |
| DS21458 |
Yes |
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289 |
$38.10 @1k |
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See All T/E Carrier & Packetized Products (100)
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Pricing 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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Diagram
Block Diagram
Block Diagram
More Information
Didn't Find What You Need?
Information Index
Rev 7;
2007-05-16
This page last modified: 2009-10-12
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