JM54AC191S2A-RH

Counter Dividers Overview

The JM54AC191S2A-RH is a radiation-hardened, 4-bit synchronous binary up/down counter manufactured by National Semiconductor. It belongs to the 54AC series, designed for high-speed applications in aerospace environments. The device features synchronous counting and asynchronous parallel loading capabilities. It is housed in a hermetic ceramic package to ensure reliability under extreme conditions. The component operates within a specified voltage range and temperature spectrum suitable for military and space missions.

Counter Dividers Feature Summary

• Radiation hardness qualification ensuring immunity to single event latch-up and upset effects
• Hermetic ceramic packaging providing protection against harsh environmental conditions
• Synchronous up/down counting functionality with asynchronous preset capability

Counter Dividers Applications

• Aerospace digital logic systems requiring radiation tolerance
• Military embedded control units operating in high-radiation zones
• Spacecraft telemetry and command data processing circuits

Counter Dividers Procurement Notes

Verify the specific suffix 'RH' indicates the required radiation-hardened qualification level. Confirm the hermetic seal integrity and batch certification documents match project specifications. Ensure the manufacturer source is authorized, as National Semiconductor assets are managed by Texas Instruments. Check for updated quality certifications if sourcing from secondary distributors.

Counter Dividers Selection Notes

Select this component when radiation tolerance is mandatory for 4-bit counting operations. Compare performance metrics against standard commercial 74AC191 variants if environmental constraints allow. Consider the hermetic package requirements versus cost implications. Verify voltage compatibility with the system power supply rails before integration into the design.

Counter Dividers Part Context

This part is part of the 54AC family of high-speed CMOS logic functions. The 54-series designation typically denotes military-grade specifications. National Semiconductor was acquired by Texas Instruments, which now manages the product line. The AC series offers improved speed and power consumption characteristics compared to earlier logic families.