JM38510/31402BEA

Multivibrators Overview

The Texas Instruments JM38510/31402BEA is a dual monostable multivibrator manufactured under the SN54221 specification. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -55°C to 125°C. The device features two independent circuits, each with negative-transition-triggered (B) and positive-transition-triggered (A) inputs. Output pulse length is determined by external timing components Rext and Cext, ranging from 35 ns to maximum limits defined by component selection.

Multivibrators Feature Summary

• Features Schmitt-trigger input circuitry on the B input for jitter-free triggering from slow transition rates.
• Includes internal compensation ensuring pulse-width stability virtually independent of supply voltage and temperature variations.
• Provides an overriding clear function that terminates output pulses immediately upon activation.

Multivibrators Applications

• Timing signal generation
• Pulse width modulation
• Delay line circuits

Multivibrators Procurement Notes

Verify the specific ordering suffix BEA corresponds to the CDIP package configuration. Confirm MIL-PRF-38535 Class B screening requirements are met if applicable. Ensure compatibility with existing system thermal management and power supply specifications before procurement.

Multivibrators Selection Notes

Select this component when high pulse-width stability across wide temperature ranges is required. Verify that external timing resistor and capacitor values fall within the recommended jitter-free operational ranges. Consider pinout compatibility with SN54123 or SN74123 designs, noting the necessary polarity change for capacitors during substitution.

Multivibrators Part Context

This part belongs to the SN54221 family of dual monostable multivibrators. It shares electrical characteristics and pin assignments with the SN54121 and SN54123 series. The device is designed for military-grade applications requiring robust performance in harsh environments.

Multivibrators Replacement Considerations

Pin assignments are identical to SN54123, SN74123, SN54LS123, and SN74LS123. Substitution requires changing the value of Rext and/or Cext and reversing the polarity of the timing capacitor.