MC74AC157MELG

Overview

The MC74AC157MELG is a quad 2-input multiplexer from the 74AC logic series, 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 within a supply voltage range of 2.0 V to 6.0 V. Propagation delays are specified as 8.5 ns at 3.3 V and 6.5 ns at 5.0 V. Outputs can source or sink up to 24 mA. It is housed in a 16-lead SOEIAJ package (Case 9661) and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Quad 2-input multiplexing capability with common select and enable control
• High-speed AC logic performance suitable for fast switching applications
• Robust output drive strength capable of sourcing and sinking 24 mA
• Function generator utility allowing implementation of sixteen different functions of two variables

Applications

• Moving data between two groups of registers to common output buses
• Implementing gating functions via function generation
• Signal routing in digital logic circuits

Procurement Notes

Verify that the specific ordering suffix ELG corresponds to the SOEIAJ-16 package configuration and tape-and-reel shipping format. Confirm RoHS compliance status and ensure the component meets the required lead-free specifications for your assembly process. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and current production status before finalizing procurement.

Selection Notes

Select this component when a quad 2-input multiplexer with high-speed AC logic characteristics is required. Ensure the design accommodates the 2.0 V to 6.0 V supply voltage range and the -40°C to +85°C operating temperature limits. Verify that the 16-lead SOEIAJ package dimensions fit the available PCB space and that the 24 mA output drive current meets the load requirements of the downstream circuitry.

Part Context

This device belongs to the MC74AC157 family of quad multiplexers produced by onsemi. It shares functional similarities with other members like the MC74AC157D and MC74AC157DTR2G but differs in physical packaging and shipping format. The SOEIAJ-16 package provides a compact surface-mount solution compared to standard SOIC or TSSOP variants found in the same product line.

Replacement Considerations

MC74AC157DR2G

FAQ

What is the primary 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.