100398QI

Overview

The Fairchild Semiconductor 100398QI is a mixed signal translator featuring bidirectional data transfer capabilities. It integrates one circuit with four channels per circuit, housed in a 28-PLCC package measuring 11.43x11.43 mm. The device functions as a quad differential ECL/TTL translating transceiver equipped with latch detection. It supports voltage supply VCCA and is designed for high-speed logic level shifting applications requiring robust signal integrity.

Feature Summary

• Bidirectional translation between ECL and TTL logic families
• Integrated latch detection mechanism for fault monitoring
• Quad differential channel configuration within a single circuit

Applications

• ECL to TTL logic level conversion systems
• TTL to ECL interface bridging
• High-speed digital communication interfaces requiring differential signaling

Procurement Notes

Verify the specific suffix variant against the manufacturer's current datasheet to ensure compatibility with required voltage levels and package tolerances. Confirm that the 28-PLCC footprint matches the target PCB design constraints. Check for any obsolescence notices from ON Semiconductor following the acquisition of Fairchild Semiconductor assets.

Selection Notes

Select this component when bidirectional translation between ECL and TTL standards is required within a compact surface-mount form factor. The integrated latch detection feature provides diagnostic capability for bus contention or stuck lines. Ensure the system operates within the specified voltage ranges for VCCA and verify thermal management requirements for the PLCC package.

Part Context

This component belongs to the Fairchild Semiconductor logic family, specifically categorized under translators and level shifters. Following the acquisition by ON Semiconductor, these parts are supported under the ON Semi portfolio. The 100398QI represents a specialized solution for interfacing legacy or high-speed ECL systems with standard TTL logic domains.

Replacement Considerations

Consult official cross-reference lists for equivalents such as the 100398QIX variant if lead-free processing is required. Verify pinout compatibility before substituting with other quad differential translators from different manufacturers.