DS26303LN-120+A3

Telecom Overview

The DS26303LN-120+A3 is an octal line interface unit (LIU) supporting E1, T1, and J1 short-haul transmission from a single 3.3V power supply. Operating within a temperature range of -40°C to +85°C, it integrates eight independent channels in a 144-pin eLQFP package. The device defaults to 120Ω impedance for T1/J1 applications. It features internal software-selectable termination, a crystal-less jitter attenuator, and selectable AMI or HDB3/B8ZS encoding. A built-in BERT tester facilitates diagnostics, while G.772 nonintrusive monitoring supports network maintenance.

Telecom Feature Summary

• Supports independent E1, T1, or J1 channel configurations with integrated clock synthesis
• Includes hardware mode interface support alongside parallel and serial host port options
• Provides transmit short-circuit protection and digital/analog loss-of-signal detection
• Complies with IEEE 1149.1 JTAG boundary scan standards

Telecom Applications

• T1 Digital Cross-Connects
• ATM and Frame Relay Equipment
• Wireless Base Stations
• E1/T1/J1 Multiplexer and Channel Banks

Telecom Procurement Notes

Verify the specific suffix 'LN' confirms the extended industrial temperature range (-40°C to +85°C). Confirm the '120' designation ensures the correct default 120Ω impedance setting for your circuit topology. Ensure the '+A3' marking aligns with current lead-free manufacturing specifications. Request the official datasheet revision history to check for any documented errata affecting signal integrity or register behavior.

Telecom Selection Notes

Select this component when designing systems requiring multiple short-haul telecom interfaces on a single board. The integrated synthesizer reduces external component count compared to discrete solutions. Verify that the host processor can accommodate the required Intel or Motorola parallel bus timing or serial interface protocols. Ensure the available master clock frequency matches the internal prescaler requirements for stable operation.

Telecom Part Context

This device belongs to the Maxim Integrated DS26303 family of line interface units. Analog Devices acquired Maxim Integrated in 2021, consolidating these products under the ADI portfolio. The DS26303 series is designed to replace older generation LIUs by offering higher integration and lower power consumption while maintaining backward compatibility with standard telecom signaling protocols.

Telecom Replacement Considerations

Consult the official cross-reference documentation for direct pin-compatible alternatives. Verify that any substitute part maintains identical 144-pin eLQFP dimensions and thermal characteristics. Ensure replacement components support the same E1/T1/J1 standards compliance levels.