MC74AC257NG

Overview

The MC74AC257NG is a quad 2-input multiplexer with 3-state outputs manufactured by onsemi. 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 2.0 V to 6.0 V and supports an operating ambient temperature range of -40°C to +85°C. Propagation delays are specified as 8.5 ns at 3.3 V and 6.0 ns at 5.0 V. Outputs can source or sink up to 24 mA.

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
• Pb-free package construction

Applications

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

Procurement Notes

Verify the specific ordering suffix for the desired package type, such as DR2G for SOIC-16 tape and reel. Confirm RoHS compliance status and check current availability through authorized distributors. Ensure the component meets environmental specifications for the intended application temperature range.

Selection Notes

Select this component when a quad 2-input multiplexer with 3-state outputs is required. Verify that the logic family matches the system voltage levels. Consider the propagation delay specifications relative to the system clock speed. Ensure the output drive capability meets the load requirements.

Part Context

This part belongs to the 74AC logic series, which offers higher speed compared to standard 74LS devices. It is functionally compatible with other 74AC series components. The device provides a cost-effective solution for digital signal routing applications requiring tri-state control capabilities.

Replacement Considerations

MC74ACT257DR2G is a confirmed substitute with TTL-compatible inputs.