M38510/31402BEA

Multivibrators Overview

The M38510/31402BEA is a dual monostable multivibrator manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55 °C to 125 °C. The device features negative-transition-triggered and positive-transition-triggered inputs, with an overriding clear function that terminates output pulses. It utilizes external timing components (Rext and Cext) to define pulse width, which can be adjusted across a wide capacitance and resistance range.

Multivibrators Feature Summary

• Features Schmitt-trigger input circuitry on the B input for jitter-free triggering from slow transition rates.
• Provides high immunity to VCC noise through internal latching circuitry.
• Delivers pulse-width stability that is virtually independent of supply voltage and temperature variations.
• Includes an overriding clear input capable of terminating the output pulse at any time.

Multivibrators Applications

• Timing generation in military-grade digital systems
• Pulse shaping and waveform generation
• Delay line circuits requiring stable pulse durations
• Reset signal generation for sequential logic

Multivibrators Procurement Notes

Verify the specific ordering suffix against the manufacturer's current package option addendum to confirm pinout compatibility and material specifications. Ensure the component meets MIL-PRF-38535 Class B requirements if mandated by the system design. Cross-reference the active production status with authorized distributors to confirm availability and authenticity before finalizing procurement plans.

Multivibrators Selection Notes

Select this component when a dual monostable multivibrator with military-grade temperature ratings is required. It serves as a functional equivalent to the SN54121 series while maintaining identical pin assignments to the SN54123/SN74123 family. Consider the external timing component constraints and the need for overriding clear functionality when evaluating alternative devices for the same application.

Multivibrators Part Context

This part belongs to the SN54/74221 family of dual monostable multivibrators. It is designed to offer performance characteristics virtually identical to the SN54121 and SN74121 one-shots. The device is available in ceramic packages suitable for harsh environments, ensuring reliability in defense and aerospace applications where extended temperature ranges are critical.

Multivibrators Replacement Considerations

SN54121J

Multivibrators FAQ

How does the device handle slow input transitions?

The B input incorporates Schmitt-trigger circuitry, allowing jitter-free triggering from inputs with transition rates as slow as 1 V/s.

Can the output pulse be terminated early?

Yes, the overriding clear input can terminate the output pulse at any time during its duration.