74HCT3G34DC-Q100H

Overview

The Nexperia 74HCT3G34DC-Q100H is a triple buffer gate from the 74HCT series, designed for automotive applications. It operates within a supply voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. The device features TTL-level inputs and CMOS outputs, providing high noise immunity and low power dissipation. It includes input clamp diodes for interfacing with voltages exceeding VCC. Qualified under AEC-Q100 Grade 1, it offers robust ESD protection exceeding 2000 V (HBM) and 1000 V (CDM). The component is housed in an 8-lead VSSOP package (SOT765-1).

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards.
• TTL-compatible input levels ensure direct interface with standard logic families.
• High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
• Integrated input clamp diodes allow current limiting resistors for over-voltage interfacing.

Applications

• Automotive electronic systems requiring qualified logic buffers.
• Signal buffering between TTL and CMOS logic domains.
• Interface circuits handling voltages exceeding the supply rail via clamp diodes.

Procurement Notes

Verify the specific ordering suffix matches the required package variant, as the DC suffix denotes the VSSOP8 form factor. Confirm that the application environment remains within the specified -40 °C to +125 °C operating temperature range. Ensure supply voltage constraints are strictly maintained between 4.5 V and 5.5 V to prevent damage or malfunction. Check for any recent product change notices regarding marking codes or pin configurations before finalizing procurement.

Selection Notes

Select this component when a triple buffer with TTL-compatible inputs is required for 5 V automotive logic systems. It is suitable for designs needing high noise immunity and robust ESD protection. Consider the VSSOP8 package if space-constrained surface-mount assembly is necessary. Verify that the propagation delay characteristics meet the timing requirements of the target circuit at the intended operating voltage.

Part Context

This part belongs to the 74HCT3G34-Q100 family of triple buffer gates manufactured by Nexperia. It shares functional similarities with the 74HC3G34-Q100 but differs in input threshold levels, supporting TTL logic compatibility. The Q100 designation indicates automotive-grade qualification. Other variants in the series include different packages such as TSSOP8, offering design flexibility for various board layout constraints while maintaining identical electrical functionality.

Replacement Considerations

The 74HC3G34DC-Q100H serves as a compatible alternative if CMOS-level inputs are acceptable instead of TTL levels. Designers must verify input voltage thresholds and propagation delays match system requirements when substituting. Ensure the replacement part maintains the same VSSOP8 package and AEC-Q100 qualification status for automotive compliance.