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DS21455
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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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.
*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.
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
Applications/Uses
- Channel Banks
- Channel Service Units (CSUs)
- Data Service Units (DSUs)
- Muxes
- Routers
- Switches
- T1/E1 Test Equipment
Technical Docs
| Data Sheet | Quad T1/E1/J1 Transceivers | May 16, 2007 | |
| App Note | DS2155 and DS26521 Software Comparison | ||
| App Note | DS21458 Quad and DS26528 Octal Transceiver Software Comparison | ||
| App Note | JJ-20.11-Compatible Interface for the DS2155 and DS21455 SCTs | ||
| App Note | T1/E1 Loopback Operation for Maxim T1/E1/J1 Transceivers | ||
| App Note | Elastic Store Operation | ||
| App Note | DS2155 and DS26401 Software Comparison | ||
| App Note | DS2155 Monitor Mode Design | ||
| App Note | DS31256 and T1/E1 Interface | ||
| App Note | T1/E1 and T3/E3 Transformer Selection Guide | ||
| App Note | T1/E1 Network Interface Design | ||
| App Note | Interfacing to the Fractional T1 and E1 |
Click any title below to view the detail page where available.
Additional Resources
Design Kit /en/design/design-tools/ee-sim.html?
 | SIMULATION MODELS DS21455 IBIS Model | Download |
| SIMULATION MODELS DS21455 BSDL Model | Download |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
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
Applications/Uses
- Channel Banks
- Channel Service Units (CSUs)
- Data Service Units (DSUs)
- Muxes
- Routers
- Switches
- T1/E1 Test Equipment
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.
*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.
Technical Docs
| Data Sheet | Quad T1/E1/J1 Transceivers | May 16, 2007 | |
| App Note | DS2155 and DS26521 Software Comparison | ||
| App Note | DS21458 Quad and DS26528 Octal Transceiver Software Comparison | ||
| App Note | JJ-20.11-Compatible Interface for the DS2155 and DS21455 SCTs | ||
| App Note | T1/E1 Loopback Operation for Maxim T1/E1/J1 Transceivers | ||
| App Note | Elastic Store Operation | ||
| App Note | DS2155 and DS26401 Software Comparison | ||
| App Note | DS2155 Monitor Mode Design | ||
| App Note | DS31256 and T1/E1 Interface | ||
| App Note | T1/E1 and T3/E3 Transformer Selection Guide | ||
| App Note | T1/E1 Network Interface Design | ||
| App Note | Interfacing to the Fractional T1 and E1 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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