74AC257SJ

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74AC257SJ is a quad 2-input multiplexer with 3-state outputs, belonging to the AC logic series. It features non-inverting outputs capable of sourcing and sinking 24 mA. The device operates within a supply voltage range of 2 V to 6 V. Propagation delay is specified at 8.5 ns at 3.3 V and 6 ns at 5 V. It is housed in a 16-lead Small Outline Package (SOP) compatible with JEDEC MS-012 standards.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexer architecture with common data select input
• Non-inverting 3-state outputs for direct bus-oriented system interfacing
• High drive capability with 24 mA source/sink current per output

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented systems requiring high-impedance state switching
• Data selection from multiple sources using common select lines
• Multiplexer expansion by tying outputs together

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix SJ against the official datasheet to confirm the 16-lead SOP package type. Confirm RoHS compliance status as availability varies by production batch. Check for active status or obsolescence notices on the manufacturer website before procurement planning.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad 2-input multiplexer with 3-state outputs is required. Ensure the operating voltage falls between 2 V and 6 V. Verify that the 8.5 ns propagation delay meets timing requirements. Confirm the SOP-16 package fits the PCB layout constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC family of CMOS logic devices. It shares functional similarities with other multiplexers like the 74AC253 but differs in input count. The AC series offers improved speed and power characteristics compared to older HC or HCT families.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for equivalent parts such as MC74AC257DR2G which shares the same logical function. Verify pin compatibility and package dimensions before substitution.