74HC4538PW,112

Overview

The Nexperia 74HC4538PW,112 is a dual retriggerable-resettable monostable multivibrator housed in a TSSOP16 (SOT403-1) package. It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features two independent circuits, each with dedicated trigger inputs for positive or negative edges, a direct reset input, and complementary outputs. Pulse width is determined by external timing components using the formula TW = 0.7 × REXT × CEXT.

Feature Summary

• Dual precision monostable multivibrator architecture with separate reset inputs
• Capable of triggering from both rising and falling signal edges
• Schmitt-trigger action on inputs ensures tolerance to slow rise and fall times
• Inputs include clamp diodes allowing interface to voltages exceeding VCC

Applications

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

Procurement Notes

Verify that the ordering suffix ,112 corresponds to the specific tape and reel packaging configuration required for your assembly line. Confirm the exact temperature grade matches your environmental specifications, as standard variants may differ from automotive grades. Ensure the TSSOP16 footprint aligns with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when dual independent monostable functions are required in a single package. The HC logic family offers CMOS low power dissipation and high noise immunity suitable for general-purpose digital systems. Consider the external timing resistor and capacitor constraints if precise pulse width accuracy across wide temperature ranges is critical for the application design.

Part Context

This part belongs to the Nexperia 74HC series of high-cmOS logic devices. The 74HC4538 specifically provides dual monostable multivibrator functionality. It is distinct from the 74HCT4538 which utilizes TTL input levels. The PW suffix indicates the TSSOP16 plastic thin shrink small outline package variant manufactured by Nexperia.

Replacement Considerations

The 74HC4538D serves as a pin-compatible alternative utilizing the SO16 package. Verify that the physical dimensions and thermal characteristics of the replacement package meet the mechanical constraints of the existing design layout.