100ELT22M

Overview

The Fairchild Semiconductor 100ELT22M is a mixed-signal translator designed for unidirectional level shifting between TTL and PECL logic families. It operates from a single +5V supply, facilitating interface connections in high-speed digital systems. The device features dual channels within an 8-SOIC package, providing efficient signal translation with low propagation delay characteristics suitable for demanding timing applications.

Feature Summary

• Unidirectional translation between TTL and differential PECL logic levels
• Operates from a single +5V power supply
• Dual-channel configuration for simultaneous signal processing

Applications

• Interfacing TTL-based microprocessors with PECL clock distribution networks
• Level shifting in high-speed data acquisition systems
• Signal translation in telecommunications equipment requiring mixed-logic compatibility

Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor's semiconductor division was acquired by ON Semiconductor. Ensure the part number suffix matches the specific package variant required. Confirm RoHS compliance status through official documentation, as legacy stock may differ from current production runs. Cross-reference datasheets to ensure functional equivalence if sourcing from alternative distributors.

Selection Notes

Select this component when interfacing standard TTL logic with PECL clocking schemes requires a single-supply solution. The dual-channel design reduces board space compared to using two separate single-channel translators. Consider the SOIC package constraints for thermal management and PCB layout density in compact designs requiring mixed-voltage domain communication.

Part Context

The 100EL series comprises high-speed logic translators manufactured by Fairchild Semiconductor. These devices are engineered to bridge voltage and signaling differences between different logic families without requiring complex external circuitry. The 100ELT22M specifically addresses the need for translating between lower-voltage TTL standards and higher-speed differential PECL signals in synchronized digital environments.

Replacement Considerations

Public confirmed substitute part numbers: 100ELT23.