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Product Detailed Parameters
- Description：R-S FLIP-FLOP
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Function：-
- Type：-
- Output Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Clock Frequency：-
- Max Propagation Delay @ V, Max CL：-
- Trigger Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Current - Quiescent (Iq)：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
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- Input Capacitance：-
- Grade：-
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Overview
The National Semiconductor 54AC05FMQB is a hex inverter integrated circuit belonging to the AC series. It features six independent single-input inverters housed in a ceramic flatpack (DFP-14) package with glass-sealed construction. The device operates within a supply voltage range of 3.3 V to 5 V and supports a maximum load capacitance of 50 pF. Key electrical characteristics include a maximum output current of 0.012 A and a typical propagation delay of 15.5 ns at nominal supply. The component is rated for operation between -55 °C and +125 °C, though it is noted as non-RoHS compliant.
Feature Summary
- Hex configuration providing six independent single-input inverter channels
- Ceramic flatpack construction with glass-sealed encapsulation for durability
- Open-drain output characteristic for flexible interfacing
Applications
- High-reliability digital logic circuits requiring hermetic sealing
- Military or aerospace systems operating in extreme temperature environments
- Industrial control applications demanding robust signal inversion
Procurement Notes
Verify compliance status carefully as this specific part number is documented as non-RoHS compliant. Confirm that the ceramic DFP-14 package aligns with your assembly capabilities, as lead forming and soldering profiles differ from standard plastic packages. Ensure the open-drain output requirement matches your downstream circuit design before procurement.
Selection Notes
Select this component when hermetic sealing and wide temperature stability are critical requirements. The AC series offers higher speed than legacy LS variants while maintaining compatibility with standard logic levels. Consider the non-RoHS status if environmental regulations apply to your final product assembly.
Part Context
This part belongs to the National Semiconductor 54AC series of high-speed CMOS logic devices. The manufacturer has been acquired by Texas Instruments, which continues to support legacy parts. The FMQB suffix indicates the specific ceramic flatpack variant with military-grade temperature rating.
Replacement Considerations
Check for TI equivalents such as SN74AC05N or SN74AC05DW for plastic package options. Verify pinout compatibility and ensure the replacement meets the required -55 °C to +125 °C operating range.
