CD4585BF3A

Comparators Overview

The CD4585BF3A is a CMOS 4-bit magnitude comparator from the Texas Instruments 4000B series, housed in a 16-lead hermetic dual-in-line ceramic (CDIP) package. It performs logical comparisons for A < B, A = B, and A > B with active high outputs. Operating voltage ranges from 3 V to 18 V, with a maximum supply current of 100 uA. Propagation delay varies by voltage: 160 ns at 15 V, 250 ns at 10 V, and 600 ns at 5 V, tested with 50 pF load. Output currents are -6.8 mA (high) and 6.8 mA (low). The device functions within a temperature range of -55 °C to +125 °C.

Comparators Feature Summary

• Provides four independent bits of magnitude comparison logic
• Utilizes hermetic ceramic packaging for environmental stability
• Features active high output states for direct interfacing

Comparators Applications

• Military aerospace digital systems requiring radiation or moisture resistance
• High-reliability industrial control logic circuits
• Precision measurement instrumentation data processing

Comparators Procurement Notes

Verify the F3A suffix confirms the hermetic ceramic package specification. Ensure procurement channels source genuine Texas Instruments components to guarantee military-grade reliability standards. Cross-reference datasheet revisions for any pinout or electrical characteristic updates before final integration into critical hardware designs.

Comparators Selection Notes

Select this component when hermetic sealing is mandatory for harsh environments. Compare propagation delays against system timing requirements across the full voltage range. Consider the CDIP footprint constraints versus plastic alternatives if weight or cost permits non-hermetic solutions for less demanding applications.

Comparators Part Context

Part of the CD4585B family, which includes plastic DIP variants like the CD4585BE. The BF3A designation specifically denotes the hermetic ceramic construction, distinguishing it from standard commercial plastic packages while maintaining identical logical functionality and electrical parameters within the 4000B CMOS series.

Comparators Replacement Considerations

CD4585BE offers identical logic in a plastic package. CD4585BF3A is the specific hermetic variant. Verify package compatibility as ceramic and plastic footprints may differ slightly in mounting requirements.