MC74HC4538AFR2

Multivibrators Overview

The MC74HC4538AFR2 is a dual precision monostable multivibrator from the onsemi HC logic series, housed in an SOIC-16 surface-mount package. It operates within a supply voltage range of 3 V to 6 V, with typical operation at 3.3 V or 5 V. The device features two independent circuits per chip, offering propagation delays of 195 ns, 39 ns, and 33 ns. Maximum power supply current is 130 uA, while output drive capabilities include 5.2 mA low-level and -5.2 mA high-level currents. It functions across an industrial temperature range from -55 C to +125 C.

Multivibrators Feature Summary

• Dual precision monostable multivibrator architecture with retriggerable and resettable functionality
• Conditioned trigger inputs allow unlimited rise and fall times without restrictions
• CMOS compatible inputs with pullup resistor support for LSTTL interface compatibility
• Output pulse width determined by external timing components Rx and Cx

Multivibrators Applications

• Pulse generation and timing control circuits
• Debouncing switches and contacts
• Frequency division and pulse stretching applications

Multivibrators Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability constraints. Confirm RoHS compliance status and specific packaging suffixes against official datasheets. Check for end-of-life notices or production change notifications that may affect long-term supply stability. Ensure storage conditions meet manufacturer specifications to prevent degradation prior to assembly.

Multivibrators Selection Notes

Select this component when precise monostable timing is required with CMOS logic compatibility. Consider the wide operating voltage range and industrial temperature rating for robust performance. Verify external timing component tolerances as the device guarantees ±10% pulse width variation. Ensure input signal characteristics align with the conditioned trigger input requirements for optimal operation.

Multivibrators Part Context

This part belongs to the MC74HC4538A family of dual precision monostable multivibrators manufactured by onsemi. It shares pinout compatibility with legacy devices like the MC14538B. The HC series provides standard CMOS performance with improved switching speeds compared to older NMOS technologies. It is categorized under Logic ICs within the broader semiconductor portfolio.

Multivibrators Replacement Considerations

Direct substitutes include MC74HC4538ADG (SOIC-16 tube) and MC74HC4538ADTR2 (TSSOP-16 reel). Cross-manufacturer equivalents such as NXP 74HC4538 or STMicroelectronics 74HC4538 are functionally identical but require verification of specific electrical parameters and package dimensions before integration.