74FST3253DTR2

Overview

The onsemi 74FST3253DTR2 is a dual 4:1 multiplexer/demultiplexer bus switch manufactured by onsemi. It operates within a supply voltage range of 4.0 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features extremely low on-resistance (RON) with typical values of 4 Ω at 4.5 V, ensuring minimal signal attenuation. Propagation delay through the switch is less than 0.25 ns maximum, providing high-speed data routing capabilities. Quiescent supply current is nearly zero, contributing to energy efficiency in active circuits.

Feature Summary

• Dual 4:1 multiplexer/demultiplexer architecture for efficient signal routing
• Extremely low on-resistance (RON) minimizes signal loss across the switch path
• High-speed operation with negligible propagation delay through the switch
• TTL/CMOS compatible control inputs ensure broad logic interface compatibility

Applications

• High-speed data bus switching applications
• Signal routing in digital communication systems
• Multiplexing and demultiplexing in embedded processing units

Procurement Notes

Verify that the specific order number matches the required package type, as the 74FST3253 series is available in both SOIC-16 and TSSOP-16 configurations. Confirm RoHS compliance status, noting that TSSOP packages are inherently lead-free while other variants may differ. Ensure control inputs are properly terminated to avoid undefined states during operation.

Selection Notes

Select this component when designing systems requiring dual independent 4-to-1 signal paths with minimal insertion loss. The FST technology offers superior speed compared to standard CMOS counterparts. Verify that the system's supply voltage remains strictly within the 4.0 V to 5.5 V operational window to maintain electrical characteristics and prevent latch-up conditions.

Part Context

This device belongs to the 74FST family of high-performance bus switches designed for fast switching applications. It serves as a direct replacement for similar devices like the QS3253, FST3253, and CBT3253 due to pin-for-pin compatibility. The component is part of onsemi's portfolio of logic integrated circuits aimed at enhancing system reliability and performance in industrial and consumer electronics.

Replacement Considerations

The datasheet explicitly lists pin-for-pin compatibility with the QS3253, FST3253, and CBT3253. These parts can be substituted directly without circuit redesign, provided their respective electrical specifications meet the application requirements.