DS78LS120J/883

Overview

The DS78LS120J/883 is a dual differential line receiver designed for balanced and unbalanced digital data transmission. It meets EIA standards RS-232-C, RS422, and RS423, as well as Federal Standards 1020, 1030, and MIL-STD-188-114. The device features a ±15V input voltage range, separate strobe inputs, and optional 180Ω termination resistors. It includes 50mV input hysteresis and a fail-safe mode with threshold offset control. Operating over a -55°C to +125°C temperature range, it provides TTL-compatible outputs with propagation delays of up to 60ns.

Feature Summary

• Dual differential receivers with independent strobe inputs for time discrimination
• Integrated 180Ω termination resistor circuit for transmission line matching
• Fail-safe operation via input threshold offset control for open or short detection
• 50mV input hysteresis for high-frequency noise rejection

Applications

• Balanced digital data transmission systems
• Unbalanced digital data transmission systems
• Logic level translation between ±12V MOS, ECL, TTL, and CMOS
• Military and aerospace communication interfaces

Procurement Notes

Verify the specific ordering suffix (e.g., J/883) against the latest Package Option Addendum to confirm package type, pin count, and material specifications. Ensure the component status matches current production requirements, as older variants may be obsolete. Cross-reference the datasheet revision date to validate electrical characteristics and absolute maximum ratings before finalizing procurement orders.

Selection Notes

Select this component when interfacing with RS-232, RS-422, or RS-423 standards requiring robust noise immunity and fail-safe detection. The wide common-mode voltage range and integrated termination make it suitable for long-distance transmission lines. Consider the operating temperature range and power dissipation limits relative to the application environment.

Part Context

This part belongs to the DS78LS120 family of dual differential line receivers. It is functionally compatible with the DS7820 but offers enhanced performance metrics. The 'J/883' suffix indicates a military-grade qualification under MIL-STD-883 standards, ensuring reliability in harsh environments compared to standard commercial variants.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.