DS21Q354BN

Telecom Overview

The DS21Q354BN is a Quad E1 Transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates four independent Single-Chip Transceivers (SCTs) into a single Multi-Chip Module (MCM). The device operates on a 3.3V supply and utilizes a 256-lead BGA package measuring 27mm x 27mm. Each SCT includes a Line Interface Unit (LIU), framer, alarm detection/generation, elastic stores, hardware signaling support, per DS0 channel control, and an HDLC controller. The architecture supports IEEE 1149.1 JTAG boundary scan and allows concatenation of all four transceivers into a single 8.192MHz backplane data stream.

Telecom Feature Summary

• Integrates four completely independent T1 or E1 transceivers within a compact multi-chip module package.
• Each transceiver provides short and long haul line interface capabilities alongside full-featured framing with alarm detection and generation.
• Supports hardware-based signaling, per DS0 channel control, and integrated HDLC controllers for each channel.
• Enables concatenation of all four transceivers to form a unified 8.192MHz backplane data stream.

Telecom Applications

• Telecommunications network interfaces requiring quad E1 connectivity.
• Short-haul and long-haul transmission systems utilizing E1 standards.
• Backplane interconnects aggregating multiple E1 channels into high-speed data streams.

Telecom Procurement Notes

Verify the specific suffix 'BN' against official manufacturer documentation to confirm pinout and electrical characteristics. Confirm availability status as this component series may be discontinued. Ensure compatibility with 3.3V logic levels and 256-lead BGA footprint requirements during sourcing.

Telecom Selection Notes

Select the DS21Q354BN specifically for applications requiring four independent E1 transceivers in a single package. Verify that the system design accommodates the 27mm x 27mm BGA footprint and 256-lead density. Ensure power supply constraints align with the 3.3V CMOS operation specified for this variant.

Telecom Part Context

This component belongs to the DS21Qx5y family of Quad T1/E1 Transceivers. It is functionally equivalent to four individual DS21354 devices packaged together. The 'BN' suffix denotes the specific package and temperature grade configuration within the Maxim Integrated product line.

Telecom Replacement Considerations

The DS21Q354C1+ is documented as a related part number within the same family. Verify pin compatibility and electrical specifications before substitution. No other direct substitutes are confirmed in the provided source material.