74AHCT1G66GW-Q100H

Overview

The Nexperia 74AHCT1G66GW-Q100H is an automotive-qualified single-pole, single-throw (SPST) analog switch housed in a TSSOP5 package. It operates on a supply voltage range of 4.5 V to 5.5 V with TTL-compatible input switching levels. The device features a maximum ON resistance of 22 Ω at 10 mA and 4.5–5.5 V. Dynamic performance includes a propagation delay of up to 3.0 ns and enable/disable times of up to 17.0 ns. It supports ambient temperatures from -40 °C to +125 °C and provides overvoltage-tolerant control inputs.

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards for extended temperature operation.
• TTL-compatible logic levels facilitate direct interfacing with standard digital logic circuits.
• Overvoltage tolerant enable input allows safe operation in mixed-voltage system environments.

Applications

• Signal routing in automotive electronic control units
• Voltage level translation between different logic domains
• Analog signal switching in industrial instrumentation

Procurement Notes

Verify the specific suffix 'Q100H' against official Nexperia documentation to confirm it denotes the TSSOP5 package variant. Ensure that the ordering code matches the required automotive grade specifications. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity before procurement.

Selection Notes

Select this component when TTL-level control signals are required within a 4.5 V to 5.5 V supply domain. The AHCT series is appropriate for applications needing robust noise immunity and compatibility with legacy logic families. Verify that the maximum ON resistance and leakage current parameters meet the specific signal integrity requirements of the target circuit design.

Part Context

This device belongs to the Nexperia 74AHC/AHCT1G66-Q100 family of single-channel analog switches. It shares functional similarities with the 74AHC1G66 variant but utilizes CMOS input thresholds instead of TTL levels. The Q100 designation indicates compliance with automotive reliability standards, distinguishing it from standard commercial-grade counterparts.

Replacement Considerations

The 74AHC1G66GW-Q100H serves as a compatible alternative if CMOS input thresholds are acceptable. For non-automotive applications, the 74AHCT1G66GW without the Q100 suffix may be considered, provided environmental ratings are sufficient.

FAQ

What is the input logic threshold type for the 74AHCT1G66?

The 74AHCT1G66 utilizes TTL-compatible input switching levels, allowing it to interface directly with devices operating at standard TTL logic voltages.

How does the enable input behave regarding voltage tolerance?

The enable input (nE) is overvoltage tolerant, permitting control signals up to 5.5 V even if the main supply voltage is lower, which facilitates use in mixed-voltage systems.

What is the maximum operating temperature for this component?

The device is specified for an ambient temperature range extending up to +125 °C, making it suitable for harsh automotive and industrial environments.