SN54LS74AJ

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SN54LS74AJ

DUAL D-TYPE POSITIVE-EDGE-TRIGGE

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Thông số kỹ thuật

Series 54LS
Part Status Active
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)

Tổng quan

Description

The SN54LS74AJ is a dual D-type flip-flop integrated circuit designed for use in digital logic applications. It belongs to the Texas Instruments 7400 series and operates at a 5V supply voltage. This device features two independent flip-flops, each with a data input (D), clock input (CLK), preset (PRE), clear (CLR), and output (Q).
The primary function of the SN54LS74AJ is to store and transfer data on the rising edge of the clock signal. It provides a high degree of noise immunity and can drive TTL-compatible loads. The flip-flops can be set or reset asynchronously via the PRE and CLR inputs, allowing for flexible control in circuit designs.
Common applications include data storage, state machines, and counters in various electronic circuits. Being a military-grade component, it offers extended temperature ranges and improved reliability. The SN54LS74AJ is ideal for robust digital systems requiring dependable flip-flop performance.

Features

The SN54LS74AJ is a dual D-type flip-flop, part of the Texas Instruments 74LS series. Key features include:
1. Dual D Flip-Flops: Contains two independent D flip-flops.
2. Edge-Triggered: Operates on the rising edge of the clock signal for reliable data capture.
3. Asynchronous Set and Reset: Each flip-flop includes asynchronous preset (set) and clear (reset) inputs for immediate state control.
4. Fast Switching: Low propagation delay, ensuring quick response times, typically around 9 ns.
5. Low Power Consumption: Designed for low power usage, making it suitable for battery-powered applications.
6. TTL Compatible: Works with standard TTL (Transistor-Transistor Logic) logic levels.
7. Wide Voltage Range: Operates across a supply voltage of 4.75V to 5.25V.
8. Temperature Range: Rated for operation in the military temperature range (-55°C to 125°C).
This device is commonly used in digital circuits for data storage, timing applications, and state machines.

Package

The SN54LS74AJ is typically packaged in a 14-pin dual in-line package (DIP) format. It may also be available in other package types, such as surface-mount packages, depending on the specific variant and manufacturer.

Pinout

The SN54LS74AJ is a dual D-type flip-flop, part of the LS (Low Power Schottky) TTL family. It has a total of 14 pins. The pin functions are as follows:
1. 1 (D1): Data input for flip-flop 1
2. 2 (CLK1): Clock input for flip-flop 1
3. 3 (CLR1): Active-low clear input for flip-flop 1
4. 4 (PRE1): Active-low preset input for flip-flop 1
5. 5 (Q1): Output of flip-flop 1
6. 6 (Q1'): Inverted output of flip-flop 1
7. 7 (GND): Ground
8. 8 (VCC): Power supply (+5V)
9. 9 (CLR2): Active-low clear input for flip-flop 2
10. 10 (PRE2): Active-low preset input for flip-flop 2
11. 11 (CLK2): Clock input for flip-flop 2
12. 12 (D2): Data input for flip-flop 2
13. 13 (Q2): Output of flip-flop 2
14. 14 (Q2'): Inverted output of flip-flop 2
This device is commonly used in digital circuits for data storage and synchronization.

Manufacturer

The SN54LS74AJ is manufactured by Texas Instruments (TI), a well-established American technology company. Texas Instruments specializes in designing and producing semiconductors and various integrated circuits (ICs), including logic devices, amplifiers, microcontrollers, and digital signal processors. Founded in 1930, TI is known for its innovations in analog and embedded processing technologies. The SN54LS74AJ is a dual D-type flip-flop, widely used in digital circuits for data storage and synchronization. Texas Instruments primarily serves the automotive, industrial, communications, and consumer electronics sectors, making it a key player in the global semiconductor industry.

Application

The SN54LS74AJ is a dual D-type flip-flop used in various digital applications, including data storage, frequency division, and timing circuits. It serves in edge-triggered memory applications, state machines, and counters, enabling synchronization and data handling in systems like computers, communication devices, and industrial control systems. Its ability to store binary information makes it essential in designing sequential logic circuits.

Equivalent

The SN54LS74AJ is a dual D-type flip-flop. Equivalent products include the SN74LS74, SN74HC74, and SN74HCT74. Note that the SN54 series is military-grade, while the SN74 series is commercial. The HC and HCT versions are high-speed CMOS alternatives.

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