MC74AC157DTR2

Overview

The MC74AC157DTR2 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 with a supply voltage range of 2.0 V to 6.0 V and supports output currents of 24 mA source/sink. It is housed in a TSSOP-16 package and functions as a logic implementation of a 4-pole, 2-position switch.

Feature Summary

• Provides quad 2-input multiplexing functionality controlled by common Select and Enable inputs
• Outputs present selected data in non-inverted form
• Capable of generating any four of sixteen different functions of two variables

Applications

• Moving data from two groups of registers to four common output busses
• Implementing gating functions via function generation
• Logic switching applications requiring 4-pole, 2-position selection

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. The 'D' suffix indicates SOIC-16 packaging, while 'DT' denotes TSSOP-16. Confirm RoHS status and lead-free availability through manufacturer datasheets or authorized distributors before procurement.

Selection Notes

Select this component for applications requiring high-speed data routing between two sources to four destinations. Ensure the operating voltage falls within the 2.0 V to 6.0 V range. Consider propagation delay specifications relative to system clock speeds and verify that the required output drive current does not exceed the 24 mA limit.

Part Context

This part belongs to the 74AC series of logic integrated circuits. It serves as a digital signal routing component within larger logic systems. The device is designed for general-purpose data selection tasks where low power consumption and high speed are prioritized over TTL-compatible input thresholds found in the ACT variant.

Replacement Considerations

MC74AC157DR2G (SOIC-16 Pb-Free)

FAQ

What is the function of the Enable input?

The Enable input is active-LOW. When HIGH, all outputs are forced LOW regardless of other inputs.

Can this device be used as a function generator?

Yes, it can generate any four of the sixteen different functions of two variables with one variable common.