74AC257SCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC257SCX is a quad 2-input multiplexer with 3-state outputs manufactured using FACT silicon gate CMOS technology. It selects four bits of data from two sources via 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. Outputs can be switched to a high impedance state via the Output Enable (OE) input.

Signal Switches, Multiplexers, Decoders Feature Summary

• Noninverting 3-state outputs allow direct interfacing with bus-oriented systems
• Outputs source and sink up to 24 mA for robust drive capability
• Multiplexer expansion is supported by tying outputs together
• Reduced ICC and IOZ characteristics compared to previous generations

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented system data routing
• Data selection between multiple sources
• Multiplexer expansion configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering code suffix against official documentation to confirm package type and tape/reel availability. Confirm RoHS compliance status and material composition details through manufacturer resources before procurement. Ensure design parameters align with absolute maximum ratings to maintain reliability.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring quad 2-input multiplexing with 3-state output control. Verify that the required propagation delay and drive current specifications meet the system requirements. Ensure the operating voltage range matches the target power supply constraints.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74AC logic family, utilizing FACT silicon gate CMOS technology. It is part of a series including AC and ACT variants, distinguished by input threshold compatibility. The SCX designation indicates a SOIC-16 surface mount package configuration.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT257 serves as a functional substitute with TTL-compatible inputs. Other packages such as MTC16 or N16E offer alternative physical footprints for the same logical function.