MC74AC157D

Overview

The MC74AC157D is a high-speed quad 2-input multiplexer manufactured by onsemi. It selects four bits of data from two sources using common Select and Enable inputs, presenting the selected data in true form. The device operates on a single power supply ranging from 2V to 6V. It features outputs capable of sourcing and sinking 24 mA. The component is housed in a 16-lead SOIC package (D suffix) and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides quad 2-input multiplexing functionality with common control signals
• Outputs are capable of sourcing and sinking 24 mA for robust drive capability
• Functions as a logic implementation of a 4-pole, 2-position switch
• Capable of generating any four of sixteen different functions of two variables

Applications

• Moving data between two groups of registers to four common output buses
• Implementing gating functions via function generation capabilities
• Selecting data sources in digital logic circuits

Procurement Notes

Verify the specific ordering suffix 'D' corresponds to the SOIC-16 package configuration required for your design. Confirm that the standard lead-free packaging designation aligns with environmental compliance requirements. Ensure the manufacturer part number matches the exact datasheet revision to guarantee accurate electrical specifications and pinout definitions during procurement.

Selection Notes

Choose this component when a quad 2-input multiplexer with high current drive is needed. The AC series offers higher speed compared to legacy counterparts. Verify that the 2V to 6V supply voltage range fits the system architecture. Consider the SOIC-16 package dimensions against available PCB real estate constraints before finalizing the selection.

Part Context

This device belongs to the 74AC logic family, known for high-speed CMOS performance. It serves as a fundamental building block for data routing and switching applications. The MC74AC157D specifically utilizes the D suffix to denote the SOIC-16 surface-mount package, distinguishing it from other physical form factors within the same logical family.

Replacement Considerations

MC74AC157DR2G

FAQ

How does the Enable input affect the outputs?

When the Enable input is HIGH, all outputs are forced LOW regardless of other inputs. When LOW, the outputs follow the selected data based on the Select input state.

Can this device be used as a function generator?

Yes, the MC74AC157D can generate any four of the sixteen different functions of two variables with one variable common, which is useful for implementing gating functions.