74AHCT1G66GW,125

Overview

The Nexperia 74AHCT1G66GW,125 is a single-pole, single-throw analog switch housed in a TSSOP5 (SOT353-1) package. It operates on a single supply voltage ranging from 4.5 V to 5.5 V. The device features an active HIGH enable input and bidirectional Y/Z terminals. At 5.5 V, the typical ON resistance is 14 Ω with a maximum of 40 Ω at -40 °C to +125 °C. Propagation delay is typically 0.7 ns, while enable and disable times are typically 4.7 ns and 6.5 ns respectively. The component supports a continuous switch current of ±25 mA and includes ESD protection exceeding 2000 V (HBM).

Feature Summary

• Overvoltage tolerant control input allows interfacing in mixed voltage environments.
• High noise immunity with CMOS low power dissipation characteristics.
• Latch-up performance exceeds 100 mA per JESD 78 Class II Level A.

Applications

• Signal routing in mixed voltage systems
• Data acquisition signal switching
• Audio and video signal path selection

Procurement Notes

Verify the ordering suffix '125' against official Nexperia documentation to confirm the specific tape and reel packaging configuration. Ensure the requested quantity aligns with standard manufacturing reel sizes. Confirm that the TSSOP5 package variant matches the design footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when TTL-compatible logic levels are required for the enable pin within a 4.5 V to 5.5 V supply range. The AHCT series provides lower input thresholds compared to standard AHC devices. Verify that the maximum ON resistance of 40 Ω meets the signal integrity requirements for the intended application bandwidth and load conditions.

Part Context

This part belongs to the Nexperia 74AHC(AHCT)1G66 family of single-channel analog switches. It shares functional similarities with the 74AHC1G66 but utilizes AHCT technology for TTL-compatible inputs. The GW suffix indicates the TSSOP5 plastic thin shrink small outline package with a 1.25 mm body width.

Replacement Considerations

The 74AHC1G66GW serves as a direct functional replacement if TTL input compatibility is not required. For automotive applications, verify if the Q100 qualified variants are necessary, though they may differ in electrical specifications or package options.

FAQ

What is the function of the enable input?

The enable input (E) controls the switch state. When E is HIGH, the switch connects Y and Z; when LOW, the switch disconnects them.

Is the switch bidirectional?

Yes, the Y and Z terminals are independent input/output terminals, allowing the signal to flow in either direction when the switch is enabled.

What is the maximum switch current rating?

The maximum switch current (ISW) is rated at ±25 mA according to the limiting values section of the datasheet.