74HC1G66GW,125

Overview

The Nexperia 74HC1G66GW,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 2.0 V to 10.0 V. The device features very low ON resistance, typically 45 Ω at 4.5 V and 25 Ω at 9.0 V. Static characteristics include an OFF-state leakage current of up to 1.0 μA at 10 V and a supply current of up to 40 μA at 10 V. Dynamic performance includes a propagation delay of 18 ns maximum at 4.5 V and a -3 dB frequency response of 180 MHz at 4.5 V. The component is specified for ambient temperatures between -40 °C and +125 °C.

Feature Summary

• CMOS technology providing high noise immunity and low power dissipation
• Wide supply voltage range supporting operation from 2.0 V to 10.0 V
• Input clamp diodes enabling interface to voltages exceeding VCC with current limiting resistors
• Latch-up performance exceeding 100 mA per JESD 78 Class II Level B

Applications

• Signal routing in portable battery-powered equipment
• Audio signal switching applications
• Video signal switching systems
• Sample-and-hold circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package variant and marking code. Confirm that the procurement channel provides valid traceability for the component lot. Ensure compliance with RoHS directives as indicated in the product data sheet before finalizing purchase orders.

Selection Notes

Select this component when a wide supply voltage range up to 10 V is required compared to standard 5 V logic switches. Consider the typical ON resistance values relative to the specific load current requirements. Verify that the input voltage levels are compatible with the system logic, noting that inputs include clamp diodes for overvoltage protection.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices manufactured by Nexperia. It is functionally similar to the 74HCT1G66 but differs in control input threshold levels, allowing the HC version to operate with standard CMOS logic levels across its full voltage range rather than being optimized for TTL interfacing.

Replacement Considerations

The 74HCT1G66GW is a functional alternative within the same family, though it has different input threshold specifications. Other single-channel analog switches from the 74LVC or 74AHC families may serve as replacements if voltage ranges and ON resistance parameters align with the design requirements.

FAQ

Can the 74HC1G66 handle input signals exceeding the supply voltage?

Yes, the inputs include clamp diodes. This allows the use of current-limiting resistors to interface inputs to voltages in excess of VCC without damaging the device.

What is the maximum supply voltage for this device?

The recommended operating conditions specify a maximum supply voltage (VCC) of 10.0 V for the 74HC1G66.

How does the ON resistance vary with supply voltage?

The ON resistance decreases as the supply voltage increases. Typical values are 45 Ω at 4.5 V, 30 Ω at 6.0 V, and 25 Ω at 9.0 V.