DS21455

Telecom Overview

The DS21455 is a quad E1-T1-J1 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 3.3 V power supply with a voltage range of 3.135 V to 3.465 V. The device supports data rates up to 64 kb/s and includes four independent channels. It functions as a Line Interface Unit (LIU) for telecom applications. The component is housed in a BGA-256 package suitable for surface mount installation. It is rated for an operating temperature range from -40°C to +85°C. The unit weighs approximately 2.784 g.

Telecom Feature Summary

• Integrates four independent transceivers for simultaneous E1, T1, and J1 line interface operations within a single chip.
• Provides comprehensive line interface unit capabilities including echo cancellation and loopback functionality for signal integrity testing.
• Supports low-voltage 3.3 V operation to reduce power consumption while maintaining compatibility with standard telecom signaling levels.

Telecom Applications

• Telecommunications network infrastructure equipment requiring multi-channel T1/E1/J1 connectivity
• Digital subscriber line access multiplexers (DSLAMs)
• Network interface cards for enterprise communication systems

Telecom Procurement Notes

Verify the specific suffix designation when sourcing replacements, as it may indicate packaging or environmental compliance variations. Confirm RoHS status through official manufacturer documentation prior to integration. Check current lifecycle status as this component may be discontinued or subject to last-time buy restrictions. Ensure compatibility with existing board layouts due to the BGA-256 package requirements.

Telecom Selection Notes

Select this component when designing systems requiring four independent serial interfaces for T1, E1, or J1 protocols. Ensure the design accommodates the BGA-256 footprint and thermal dissipation needs for the specified operating temperature range. Verify that the system power supply strictly maintains the 3.3 V nominal requirement within the defined tolerance limits to ensure proper transceiver operation.

Telecom Part Context

This part belongs to the Maxim Integrated DS2145x series of high-performance telecom interface ICs. It is designed to replace older discrete solutions by integrating multiple LIUs into a compact form factor. The series is widely used in legacy and modern telecommunications hardware for standardized digital carrier interfacing.

Telecom Replacement Considerations

Consult official cross-reference tools for parametrically similar parts. Verify pinout compatibility before substituting with other quad transceivers from the same family or competitors.