MC74HC4538AFL2

Multivibrators Overview

The MC74HC4538AFL2 is a dual precision monostable multivibrator manufactured by onsemi. It operates within a supply voltage range of 3.0 V to 6.0 V and features low input current of 1.0 μA. The device allows unlimited rise and fall times on trigger inputs, ensuring compatibility with various signal sources. Output pulse width is determined by external timing components Rx and Cx, with guaranteed pulse width variation of ±10% from part to part when using the same test jig. It provides an output drive capability of 10 LSTTL loads and includes a reset function that forces the Q output low regardless of the pulse circuitry state.

Multivibrators Feature Summary

• Dual precision monostable multivibrator architecture with retriggerable and resettable functionality
• Conditioned trigger inputs allow unlimited rise and fall time restrictions for flexible design integration
• Direct interface capability with CMOS, NMOS, and TTL logic families without additional buffering
• High noise immunity characteristics compliant with JEDEC Standard No. 7A requirements

Multivibrators Applications

• Pulse generation circuits requiring precise timing control via external RC networks
• Debouncing switches or contacts in digital systems
• Timing delay applications in sequential logic control
• Frequency division and pulse stretching in data acquisition systems

Multivibrators Procurement Notes

Verify the specific suffix FL2 against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the exact electrical grade and temperature range required for your application. Cross-reference with onsemi's current product change notices to confirm availability and any potential pinout or parameter updates since the last revision.

Multivibrators Selection Notes

Select this component when dual independent monostable timing channels are required in a single package. It is suitable for designs needing high noise immunity and direct interfacing with standard logic families. Consider the external timing component tolerance as it directly impacts the overall pulse width accuracy, which is specified at ±10% under identical test conditions.

Multivibrators Part Context

This device belongs to the 74HC series of high-speed CMOS logic devices. It is functionally compatible with other manufacturers' 74HC4538 variants, such as those from Fairchild or NXP, though pinouts should be verified. The MC74HC4538A variant shares pinout compatibility with the older MC14538B, facilitating upgrades in legacy designs while offering improved speed and lower power consumption typical of HC technology.

Multivibrators Replacement Considerations

Check for cross-manufacturer equivalents like TC74HC4538AF-ELF (Toshiba) or 74HC4538D (Toshiba). Verify that substitute parts maintain the same SOIC-16 package and electrical characteristics, particularly the 3.0–6.0 V operating range and 1.0 μA input current specs.