74AC257SC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC257SC is a quad 2-input multiplexer with 3-state outputs housed in a 16-lead SOIC package. It selects four bits of data from two sources using a common data select input, presenting the selected data in true form. The device operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature range of -40°C to +85°C. Propagation delays are specified as 8.5 ns at 3.3V and 6.0 ns at 5.0V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexer functionality with noninverting 3-state outputs
• Common data select input controls selection between two data sources
• Outputs switch to high impedance state via common output enable input
• Reduced quiescent supply current and output leakage compared to previous generations

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system interfacing
• Multiplexer expansion by tying outputs together
• Data routing between multiple sources

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel availability. Confirm RoHS compliance status for the specific revision. Check for active or obsolete lifecycle status before finalizing procurement plans.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad 2-input multiplexer with 3-state outputs is required. Ensure the design accommodates the 2.0V to 6.0V supply voltage range. Verify that the propagation delay specifications meet the system timing requirements at the intended operating voltage.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC logic family, characterized by high-speed CMOS technology. It is functionally compatible with other devices in the 74AC series. The SC suffix indicates a 16-lead Small Outline Integrated Circuit (SOIC) package.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT257SC is a variant with TTL-compatible inputs but requires a 4.5V to 5.5V supply voltage. Other packages such as TSSOP or PDIP may be available under different suffixes.