MC74HCT4066ADTG

Overview

The MC74HCT4066ADTG is a quad single-pole, single-throw analog switch manufactured by onsemi. It utilizes silicon-gate CMOS technology to provide fast propagation delays and low ON resistances. The device features four independent bilateral switches with LSTTL compatible inputs. It operates within a power-supply voltage range of 4.5 V to 5.5 V and supports an analog input voltage range from GND to VCC. Key electrical parameters include a maximum ON resistance of 120 Ω at 4.5 V, a maximum propagation delay of 15 ns, and an operating temperature range of -55°C to +125°C. The component is housed in a TSSOP-14 package.

Feature Summary

• Bilateral switching capability for analog and digital signals across the full power-supply range
• LSTTL compatible control inputs allowing direct interfacing with standard logic families
• Improved linearity and lower ON resistance over input voltage compared to metal-gate CMOS equivalents
• Integrated diode protection on all inputs and outputs against electrostatic discharge

Applications

• Multiplexer and demultiplexer circuits
• Sample-and-hold amplifiers
• Gate arrays for analog signal routing
• Voltage-controlled attenuators

Procurement Notes

Verify the specific ordering suffix 'DTG' corresponds to the TSSOP-14 package configuration as defined in the official datasheet. Confirm RoHS compliance status and Pb-Free designation through current manufacturer documentation. Check for any discontinuation notices or recommended alternative part numbers prior to finalizing procurement plans.

Selection Notes

Select this component when LSTTL compatibility is required for control logic interfacing. Ensure the application voltage does not exceed the 5.5 V maximum supply rating. Consider the 120 Ω maximum ON resistance specification for signal integrity requirements. Verify that the TSSOP-14 package dimensions fit the target PCB layout constraints.

Part Context

This device belongs to the 74HCT series of high-speed CMOS logic components. It serves as a functional equivalent to older metal-gate CMOS devices like the MC14016 and MC14066 while offering improved performance characteristics. The HCT logic family bridges the gap between standard CMOS and TTL logic levels, making it suitable for mixed-voltage system designs.

Replacement Considerations

The datasheet notes that the MC74HCT4066A has been discontinued. Designers should consult onsemi representatives for current replacement options or verify if the HC4316A is a suitable alternative for applications requiring voltage-level translation.