74HCT2G66DC,125

Analog Switches, Multiplexers, Demultiplexers Overview

The Nexperia 74HCT2G66DC,125 is a dual single-pole single-throw analog switch in the HCT logic family. It features two independent switches with active HIGH enable inputs and bidirectional nY/nZ terminals. The device operates on a single supply voltage ranging from 4.5 V to 5.5 V. Key electrical parameters include a maximum ON resistance of 128 Ω at 4.5 V, propagation delay up to 18 ns, enable time up to 36 ns, and disable time up to 53 ns. It provides high noise immunity and ESD protection exceeding 2000 V (HBM). The component is housed in an 8-lead VSSOP package (SOT765-1) and supports an operating temperature range from -40 °C to +125 °C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Dual SPST analog switching configuration with independent digital control
• CMOS technology ensuring low power dissipation and high noise immunity
• Input clamp diodes allow interfacing with voltages exceeding VCC using current limiting resistors
• Robust electrostatic discharge protection compliant with JEDEC standards

Analog Switches, Multiplexers, Demultiplexers Applications

• Signal routing in data acquisition systems
• Multiplexing applications for sensor interfaces
• Isolation between different signal domains in mixed-signal circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when TTL-compatible logic levels are required for control signals within a 5 V system. The HCT series ensures compatibility with standard TTL outputs while maintaining CMOS input characteristics. Ensure the application voltage does not exceed the 5.5 V maximum rating and that the thermal derating requirements for the VSSOP package are met during operation.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the Nexperia 74HCT2Gxx series of dual analog switches. It shares the same functional block diagram and pinout as the 74HC2G66 but utilizes HCT logic thresholds for the enable inputs. The DC suffix specifically denotes the VSSOP8 plastic very thin shrink small outline package (SOT765-1), distinguishing it from TSSOP or XSON variants.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The 74HC2G66DC,125 serves as a direct functional replacement if TTL-level input compatibility is not required, offering a wider supply voltage range. Other package variants such as 74HCT2G66DP (TSSOP8) or 74HCT2G66GT (XSON8) provide identical functionality but require footprint adaptation.