74FST3257DTR2

Overview

The onsemi 74FST3257DTR2 is a quad 2:1 multiplexer/demultiplexer bus switch in a TSSOP-16 package. It operates between 4.0 V and 5.5 V with TTL/CMOS compatibility. Key electrical parameters include a maximum propagation delay of 0.25 ns, typical on-resistance (RON) of 4 Ω at 4.5 V, and quiescent supply current of 3 µA. The device supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides extremely low RON and nearly zero propagation delay for high-speed signal routing.
• Adds no noise or ground bounce to the system during operation.
• Features control inputs that are compatible with both TTL and CMOS logic levels.

Applications

• High-performance multiplexing and demultiplexing bus switching
• Signal routing in systems requiring minimal propagation delay

Procurement Notes

Verify the specific suffix 'DTR2' corresponds to the TSSOP-16 tape and reel packaging configuration. Confirm RoHS compliance status if required by your assembly process, as standard versions may differ from Pb-Free variants. Ensure the ordering number matches the exact pinout and package dimensions specified in the datasheet.

Selection Notes

Select this component when a quad 2:1 mux/demux with sub-nanosecond delay is required. It is suitable for applications needing low on-resistance and high-speed data transfer. Verify voltage compatibility within the 4.0 V to 5.5 V range and ensure the TSSOP-16 footprint fits the design constraints.

Part Context

This part belongs to the 74FST series of high-speed bus switches manufactured by onsemi. It is designed to replace older logic families with faster switching speeds and lower power consumption. The device integrates four independent switches into a single compact package for efficient board space utilization.

Replacement Considerations

Pin-for-pin compatible substitutes include QS3257, FST3257, and CBT3257. Verify functional equivalence and package dimensions before substitution.

FAQ

What is the maximum propagation delay through the switch?

The maximum propagation delay through the switch is less than 0.25 ns.

Is the device compatible with TTL logic levels?

Yes, the control inputs are TTL/CMOS compatible when operating between 4 and 5.5 volts.