MM74HC4051MX

Overview

The MM74HC4051MX is an 8-channel analog multiplexer/demultiplexer manufactured by onsemi, utilizing advanced silicon-gate CMOS technology. It operates within a supply voltage range of 2 V to 6 V for VCC and supports analog signal ranges up to ±6 V peak with a corresponding VEE supply. The device features bidirectional switches with a maximum on-resistance of 230 Ohms at 2 V supply. Key electrical parameters include a propagation delay of 60 ns (at 2 V) and a bandwidth of 30 MHz. It is housed in a 16-lead SOIC-Narrow package.

Feature Summary

• Bidirectional switching capability allows any analog input to function as an output and vice versa.
• Integrated linearization circuitry reduces on-resistance variations and improves switch linearity.
• Built-in logic level translation enables control via 0–6 V digital signals while managing higher voltage analog inputs.
• Inhibit control terminal disables all switches simultaneously when set to a high logic level.

Applications

• Data acquisition systems requiring multi-channel signal selection
• Audio routing and signal processing circuits
• Programmable gain amplifier front-ends

Procurement Notes

Verify the component status carefully before procurement planning. Official distributor records indicate this specific part number is listed as obsolete or end-of-life. Confirm current availability through authorized channels or consider alternative sourcing strategies due to potential discontinuation.

Selection Notes

Select this component when designing with standard HC logic levels requiring analog signal transmission. Ensure the design accommodates the required dual-supply configuration if bipolar analog signals are necessary. Verify that the load resistance and capacitance requirements fall within the specified AC electrical characteristics for optimal performance.

Part Context

This device belongs to the MM74HC405x family, which includes the MM74HC4052 (dual 4-channel) and MM74HC4053 (triple 2-channel). All members share similar CMOS fabrication processes and pinout compatibility where applicable, facilitating modular design approaches in multiplexing applications.

Replacement Considerations

Publicly confirmed substitute part numbers include CD74HC4051M from Texas Instruments and TC74HC4051AF from Toshiba. These alternatives offer functional equivalence but may differ in packaging dimensions or specific electrical tolerances; datasheet comparison is recommended.

FAQ

How does the device handle analog signals exceeding the digital logic voltage?

The MM74HC4051MX includes built-in level shifting circuitry. This allows it to control analog signals up to ±6 V peak using digital control signals ranging from 0 to 6 V, provided the appropriate VEE supply is connected.

What is the maximum quiescent supply current?

The maximum quiescent supply current (ICC) is 80 μA at 25°C with a 6 V supply. This value increases to 160 μA at temperatures between -40°C and 85°C under the same conditions.

Is the switch operation unidirectional or bidirectional?

The switches are bidirectional. Any of the eight analog I/O pins can serve as an input or an output depending on the system configuration and signal flow direction.