DS21Q554

Telecom Overview

The DS21Q554 is a Quad T1/E1 Transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates four independent T1 transceivers within a single 27mm x 27mm Multi-Chip Module (MCM) BGA package containing 256 leads. The device operates on a 5V supply and supports low power CMOS technology with 5V tolerant inputs and outputs. Each transceiver includes short and long haul line interfaces, full-featured framer capabilities, alarm detection/generation, elastic stores, hardware-based signaling support, per DS0 channel control, and an HDLC controller.

Telecom Feature Summary

• Integrates four completely independent T1 transceivers in a compact 27mm x 27mm MCM BGA package
• Includes short and long haul line interfaces plus full-featured framer with alarm detection and generation
• Supports elastic stores, hardware-based signaling, per DS0 channel control, and HDLC controller
• Features IEEE 1149.1 JTAG boundary scan architecture for testing and diagnostics

Telecom Applications

• Telecommunications interface systems requiring high-density T1 transceiver integration
• Backplane data stream concatenation applications supporting up to 8.192MHz operation
• Hardware-based signaling and HDLC controller implementations in telecom equipment

Telecom Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices prior to procurement. Ensure the specific ordering suffix matches design requirements as suffixes may indicate variations in packaging or environmental ratings. Validate lead availability and lifecycle status directly with the supplier before finalizing orders.

Telecom Selection Notes

Select the DS21Q554 when four independent T1 transceivers are required in a single footprint. Verify that the 5V operating voltage aligns with system power rails. Consider pin compatibility with the DS21Q352/DS21Q552 series if E1/T1 interchangeability is needed. Ensure PCB layout accommodates the 256-lead BGA package dimensions and decoupling requirements specified in the datasheet.

Telecom Part Context

The DS21Q554 belongs to the Dallas Semiconductor/MAXIM DS21Qx5y family of quad transceivers. It is part of a broader lineup including the DS21Q352, DS21Q552, and DS21Q354 variants. These devices utilize Multi-Chip Module technology to house four silicon dies of single-chip transceivers like the DS21352/DS21552 or DS21354/DS21554 into one compact package.

Telecom Replacement Considerations

The DS21Q352, DS21Q552, and DS21Q354 are pin-compatible alternatives within the same family. The DS21Q354 serves as a direct functional substitute for E1 applications, while the DS21Q352 and DS21Q552 offer T1 options with different voltage specifications.