74AC251SC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC251SC is an 8-input digital multiplexer with 3-state outputs housed in a 16-lead Small Outline Integrated Circuit (SOIC). It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. The device provides both true and complementary outputs, sourcing or sinking up to 24 mA. Propagation delays for select-to-output transitions are typically 8.5 ns at 5V with 50 pF load.

Signal Switches, Multiplexers, Decoders Feature Summary

• On-chip select logic decoding for direct control of eight data inputs
• Inverting and noninverting three-state outputs for bus expansion
• High-speed CMOS technology with reduced quiescent current
• Universal function generator capability for four-variable logic functions

Signal Switches, Multiplexers, Decoders Applications

• Data routing and selection in digital systems
• Bus-oriented switching applications
• Universal function generation using four variables
• Parallel-to-serial data conversion

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package variant against the datasheet ordering codes. Confirm that the SOIC-16 (M16A) designation matches the required footprint. Ensure compatibility with the 2.0V to 6.0V supply range and check for any specific handling requirements related to static sensitivity during assembly.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-channel multiplexer with high drive capability is required. The 3-state outputs facilitate easy bus integration without external tri-state buffers. Consider the propagation delay specifications relative to system clock speeds and ensure the input voltage thresholds align with the driving logic family.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74AC series of high-speed CMOS logic components. It serves as a standard solution for multi-path signal selection in general-purpose digital electronics. The AC series offers improved speed over older LS counterparts while maintaining low power consumption characteristics suitable for battery-operated or heat-sensitive environments.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT251SC is a compatible alternative featuring TTL-compatible inputs, though it requires a stricter 4.5V to 5.5V supply range. Verify pinout compatibility and electrical parameter alignment before substitution.