DS21458+

Drivers, Receivers, Transceivers Overview

The DS21458+ is a quad monolithic T1/E1/J1 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features four independent transceivers, each composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface. The device operates on a single 3.3V supply with 5V tolerant inputs and outputs. It supports Intel or Motorola bus operations via an 8-bit parallel control port. The component is housed in a 17mm x 17mm CSBGA package containing 256 pins. It functions within a temperature range of 0°C to +70°C.

Drivers, Receivers, Transceivers Feature Summary

• Four independent transceivers supporting T1, E1, and J1 software-configurable operation
• Integrated line interface units with crystal-less jitter attenuation and CMI coder/decoder
• Dual HDLC controllers and programmable BERT generator/detector for diagnostics
• IEEE 1149.1 JTAG boundary scan support for test access

Drivers, Receivers, Transceivers Applications

• Routers
• Channel Service Units (CSUs)
• Data Service Units (DSUs)
• Muxes
• Switches

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix when sourcing components. The '+' designation indicates a lead-free and RoHS-compliant package variant. Confirm that the required operating temperature range matches the standard commercial grade specifications for this part number before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select the DS21458+ for applications requiring four independent T1/E1/J1 channels in a compact form factor. Ensure the design accommodates the 256-pin CSBGA package constraints. Verify compatibility with the 8-bit parallel control port interface requirements for the host processor system integration.

Drivers, Receivers, Transceivers Part Context

The DS21458+ belongs to the DS21455/DS21458 family of quad monolithic devices. It serves as a direct replacement for the older DS21Q55 quad MCM device while offering a smaller package footprint. The device shares a common register map with the single-port DS2155, facilitating migration from single-channel designs.

Drivers, Receivers, Transceivers Replacement Considerations

The DS21455 is a direct replacement for the DS21Q55 but utilizes a different 256-pin BGA package compared to the DS21458's CSBGA. Both share similar functionality but differ in physical dimensions and pinout configurations.