NLVHC4538ADTR2

Overview

The NLVHC4538ADTR2G is a dual precision monostable multivibrator manufactured by onsemi. It operates within a supply voltage range of 2.0 to 6.0 V and supports an ambient temperature range from -55 °C to +125 °C. The device features retriggerable and resettable functionality with positive-edge (A) and negative-edge (B) trigger inputs. Output pulse width is determined by external timing components Rx and Cx, utilizing linear CMOS techniques for stability. It provides non-inverted (Q) and inverted (NQ) outputs, compatible with standard CMOS, NMOS, and TTL loads.

Feature Summary

• Retriggerable operation allows output pulse extension when triggered during the timing cycle.
• Conditioned trigger inputs eliminate restrictions on input rise and fall times.
• Active-low reset function forces Q output low and NQ output high regardless of pulse state.
• Automotive qualification includes AEC-Q100 certification and PPAP capability.

Applications

• Pulse generation and timing circuits
• Debouncing switches or contacts
• Frequency division
• Timing delay applications

Procurement Notes

Verify the specific ordering suffix 'DTR2G' corresponds to the TSSOP-16 package configuration. Confirm that the NLV prefix indicates compliance with automotive site and control change requirements. Ensure compatibility with system power-down sequences regarding external capacitor discharge currents through protection diodes.

Selection Notes

Select this component for applications requiring precise monostable timing with wide pulse width ranges. The HC logic family ensures compatibility with standard digital interfaces. Consider the operating temperature range and supply voltage limits relative to the target environment. Verify external timing component selection against leakage current specifications for optimal pulse width accuracy.

Part Context

This device belongs to the MC74HC4538A series of dual precision monostable multivibrators. It shares pinout compatibility with the MC14538B. The NLV prefix designates parts intended for automotive and other applications requiring unique site and control change requirements, distinguishing them from standard commercial variants.

Replacement Considerations

MC74HC4538ADTR2G

FAQ

How does the device handle trigger input rise and fall times?

The device features conditioned trigger inputs, allowing unlimited rise and fall times without affecting performance.

What is the effect of applying a low level to the Reset pin?

Applying a low level to the Reset pin forces the Q output low and the NQ output high, terminating the output pulse immediately.

Are there restrictions on using electrolytic capacitors for timing?

Electrolytic capacitors are not recommended due to high leakage currents; polystyrene capacitors are suggested for optimum pulse width control.