74HC4538D-Q100,118

Overview

The Nexperia 74HC4538D-Q100,118 is a dual retriggerable-resettable monostable multivibrator in the HC logic family. It operates within a supply voltage range of 2.0 V to 6.0 V and is housed in an SO16 (SOT109-1) package. The device features two independent multivibrators with separate trigger inputs for positive or negative edge triggering, direct reset inputs, and complementary outputs. Pulse width is determined by external timing components using the formula TW = 0.7 × REXT × CEXT. It meets AEC-Q100 Grade 1 qualification and operates from -40 °C to +125 °C.

Feature Summary

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
• Dual retriggerable-resettable precision monostable multivibrator design
• Schmitt-trigger action in trigger inputs for tolerance to slow rise and fall times
• Inputs include clamp diodes enabling interface to voltages exceeding VCC

Applications

• Pulse generation circuits
• Timing delay applications
• Debouncing switches
• Frequency division

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the D suffix indicates the SO16 plastic small outline package. Confirm that the component grade aligns with automotive requirements if used in vehicle systems. Ensure external timing components are selected within specified limits to maintain pulse width accuracy across the operating temperature range.

Selection Notes

Select this component when dual independent monostable functions are required in an automotive environment. The HC logic family provides compatibility with standard CMOS levels. Consider the SO16 package dimensions for PCB layout constraints. Verify that the external resistor and capacitor values support the desired pulse width without exceeding the recommended operating conditions for leakage current or power dissipation.

Part Context

This part belongs to the Nexperia 74HC4538-Q100 series, which includes variants such as the PW version in a TSSOP16 package. The series is designed for high noise immunity and low power dissipation. It complies with JEDEC standards JESD8C and JESD7A. The product is suitable for applications requiring precise control of output pulse width with minimal variation over temperature.

Replacement Considerations

The 74HC4538PW-Q100 is a pin-compatible alternative available in a TSSOP16 package. Both variants share identical electrical characteristics and functionality. Selection between them depends on PCB space requirements and preferred mounting style.