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Product Detailed Parameters
- Description：SN54ALS74A DUAL POSITIVE-EDGE-TR
- Series：*
- Mfr：Texas Instruments
- 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：-
- Package / Case：-
- Input Capacitance：-
- Grade：-
- Qualification：-
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Overview
The Texas Instruments SN54ALS74A (MIL-Std part number 8401101DA) is a dual positive-edge-triggered D-type flip-flop designed for military and aerospace applications. It features independent clear and preset inputs, allowing direct control of the output state. The device operates within an extended temperature range of -55°C to +125°C. It is housed in a ceramic flat pack (CFP) package with 14 pins, ensuring reliability under harsh environmental conditions.
Feature Summary
- Dual positive-edge-triggered D-type flip-flop architecture
- Independent asynchronous clear and preset inputs
- Military-grade reliability with extended temperature operation
Applications
- Military communication systems
- Aerospace data processing units
- Harsh environment logic circuits
Procurement Notes
Verify that the specific ordering suffix corresponds to the MIL-Std 8401101DA designation rather than commercial variants. Confirm the package type is the 14-pin CFP suitable for high-reliability mounting. Ensure documentation explicitly states compliance with the required military specifications for the intended operational environment.
Selection Notes
Select this component when military qualification and wide temperature tolerance are mandatory. The SN54 series offers superior performance over commercial counterparts in extreme conditions. Consider the CFP package constraints for board layout and thermal management requirements in enclosed aerospace or defense enclosures.
Part Context
This part belongs to the SN54ALS family, which provides advanced low-power Schottky logic capabilities. The 8401101DA identifier specifically denotes the military standard version of the SN54ALS74A, distinguishing it from commercial grade parts through stricter manufacturing controls and testing protocols.
Replacement Considerations
Direct replacements include other SN54ALS74A variants with compatible military suffixes. Verify pinout compatibility and voltage levels before substituting with non-TI manufacturers' equivalents.
