MC74AC257DR2G

Overview

The MC74AC257DR2G is a quad 2-input multiplexer with 3-state outputs manufactured by onsemi. It belongs to the AC logic series and operates within a supply voltage range of 2V to 6V. The device features four bits of data selection from two sources using a common data select input, presenting selected data in true form. Outputs can be switched to a high-impedance state via a common output enable input. It is housed in a 16-SOIC package and supports surface mount installation.

Feature Summary

• Quad 2-input multiplexer architecture allowing selection of four bits of data from two sources
• Noninverting 3-state outputs capable of interfacing directly with bus-oriented systems
• Common output enable input allows switching outputs to a high-impedance state

Applications

• Bus-oriented system data routing
• Multiplexer expansion by tying outputs together
• Data selection circuits requiring noninverting 3-state outputs

Procurement Notes

Verify the specific orderable part number for lead-free (Pb-free) and halide-free compliance, as standard specifications may differ from environmental variants. Confirm the package type matches the required 16-SOIC footprint and ensure the operating temperature range aligns with the application's thermal constraints before finalizing procurement.

Selection Notes

Select this component when a quad 2-input multiplexer with 3-state outputs is required for bus-oriented applications. Ensure the design utilizes a single power supply within the 2V to 6V range. Consider the 24mA source/sink current capability for load driving requirements and verify that the noninverting output polarity meets the signal path needs.

Part Context

This component is part of the MC74AC(T)257 family, which includes both AC and ACT logic series variants. The AC series provides standard CMOS performance, while the ACT series offers TTL-compatible inputs. The DR2G suffix indicates a tape and reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

MC74AC157DR2G is listed as a substitute option.