MC74HC4538ADTR2G

Multivibrators Overview

The MC74HC4538ADTR2G is a dual precision monostable multivibrator from the HC logic series, manufactured by onsemi. It operates within a supply voltage range of 2.0 to 6.0 V and features two independent circuits per package. The device accepts positive-edge triggers at inputs A1/A2 and negative-edge triggers at B1/B2. Propagation delays from trigger input to Q output range from 30 ns to 265 ns depending on voltage and temperature. Maximum quiescent supply current is 130 µA at 6.0 V. Output drive capability supports up to 10 LSTTL loads.

Multivibrators Feature Summary

• Retriggerable operation allows pulse extension when triggered during an active timing cycle
• Conditioned trigger inputs eliminate restrictions on rise and fall times for reliable triggering
• Active-low reset function forces outputs to defined states regardless of internal circuit status
• Outputs directly interface with CMOS, NMOS, and TTL logic families

Multivibrators Applications

• Pulse width generation and shaping in digital systems
• Timing delay circuits requiring precise duration control
• Debouncing switches or contacts to produce clean single pulses
• Frequency division and pulse stretching applications

Multivibrators Procurement Notes

Verify the specific ordering suffix 'TR2G' confirms the TSSOP-16 tape and reel packaging format. Confirm RoHS compliance and lead-free status as indicated by the 'G' suffix. Check manufacturer discontinuation notices for legacy variants like the DR2G suffix before finalizing procurement plans.

Multivibrators Selection Notes

Select this component when dual precision timing is required within a single package. Ensure external timing components are selected to maintain pulse width variation within the specified ±10% tolerance. Verify that the operating voltage remains within the 2.0 V to 6.0 V recommended limits for optimal performance.

Multivibrators Part Context

This part belongs to the MC74HC4538A family of dual precision monostable multivibrators. It shares pinout compatibility with the MC14538B. The device utilizes advanced silicon-gate CMOS technology to provide speeds comparable to low-power Schottky TTL while maintaining high noise immunity and low power consumption characteristics typical of CMOS devices.

Multivibrators Replacement Considerations

MC74HC4538ADG (SOIC-16) offers identical electrical specifications but uses a surface-mount integrated circuit package instead of TSSOP-16.