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SN54LS74AJ is listed in the Flip Flops range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is DUAL D-TYPE POSITIVE-EDGE-TRIGGE. Review the specifications below when checking this part for your BOM.
Flip Flops specifications for SN54LS74AJ
- Description：DUAL D-TYPE POSITIVE-EDGE-TRIGGE
- Series：54LS
- Mfr：Texas Instruments
- Package：Tube
- Function：Set(Preset) and Reset
- Type：D-Type
- Output Type：Complementary
- Number of Elements：2
- Number of Bits per Element：1
- Clock Frequency：33 MHz
- Max Propagation Delay @ V, Max CL：40ns @ 5V, 15pF
- Trigger Type：Positive Edge
- Current - Output High, Low：400µA, 4mA
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Iq)：8 mA
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Supplier Device Package：14-CDIP
- Package / Case：14-CDIP (0.300", 7.62mm)
- Input Capacitance：-
- Grade：-
- Qualification：-
Flip Flops datasheet and documents for SN54LS74AJ
Flip Flops Overview
The SN54LS74AJ is a dual positive-edge triggered D flip-flop from the Texas Instruments SN54LS series. It features complementary outputs and operates within an extended military temperature range of -55 °C to 125 °C. The device utilizes a ceramic DIP-14 package with metal-sealed cofired construction, ensuring durability in harsh environments. Key electrical parameters include a maximum propagation delay of 40 ns and a supply voltage range typical for LS TTL logic.
Flip Flops Feature Summary
- Dual positive-edge triggered D flip-flops with complementary outputs
- Military-grade operation across -55 °C to 125 °C
- Hermetically sealed ceramic DIP-14 package
Flip Flops Applications
- Military aerospace digital systems
- Harsh environment data storage registers
- High-reliability shift registers
Flip Flops Procurement Notes
Verify the specific manufacturer source, as SN54LS74AJ parts are sourced from multiple vendors including NXP and Texas Instruments. Confirm the package material is ceramic DIP-14 and check for RoHS compliance status, as legacy military parts may have different regulatory classifications. Ensure the supplier provides traceable documentation for the hermetic seal integrity.
Flip Flops Selection Notes
Select this component when military-grade temperature stability and hermetic sealing are required. The SN54LS74AJ offers higher thermal tolerance than commercial SN74LS variants. Verify that the system design accommodates the specific pinout and power requirements of the ceramic DIP-14 package.
Flip Flops Part Context
This part belongs to the standard SN54/74LS logic family, designed for low-power Schottky applications. The SN54 prefix indicates military qualification and extended temperature range compared to the SN74 commercial grade. It serves as a fundamental building block for sequential logic circuits requiring reliable data retention under extreme conditions.
Flip Flops Replacement Considerations
SN54LS74J (Ceramic DIP-14)
Flip Flops FAQ
What is the operating temperature range?
-55 °C to 125 °C
What is the package type?
CDIP14 (Ceramic Dual In-line Package)
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