Overview
The SN74LS74ANS is a dual D-type positive-edge-triggered flip-flop integrated circuit produced by Texas Instruments. This device is part of the 74LS series, known for its low-power Schottky technology, making it suitable for a wide range of digital logic applications. The SN74LS74ANS is designed to operate reliably in industrial and commercial environments, offering high performance and low power consumption. Its target user groups include engineers and designers working on digital systems, embedded systems, and general-purpose logic circuits. The unique selling point of this model lies in its dual flip-flop configuration, which allows for versatile usage in sequential logic circuits, and its compatibility with TTL logic levels.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage (Vcc) | 4.75 to 5.25 | V | Typical 5V |
| High-Level Input Voltage (VIH) | 2.0 | V | Min |
| Low-Level Input Voltage (VIL) | 0.8 | V | Max |
| High-Level Output Voltage (VOH) | 2.7 | V | Min at IOH = -400µA |
| Low-Level Output Voltage (VOL) | 0.5 | V | Max at IOL = 8mA |
| Operating Temperature Range | 0 to 70 | °C | Commercial |
| Propagation Delay (tPLH, tPHL) | 20 | ns | Typical |
| Power Dissipation | 10 | mW | Per Flip-Flop |
| Package Type | PDIP-14 | - | Plastic Dual In-Line |
| Logic Family | 74LS | - | Low-Power Schottky |
Key Features
- Dual D-Type Flip-Flops: Contains two independent flip-flops in a single package, enabling compact and efficient designs.
- Positive-Edge Triggering: Ensures reliable operation on the rising edge of the clock signal.
- Asynchronous Clear and Preset: Provides additional control over the flip-flop states.
- Low Power Consumption: Ideal for battery-powered and energy-efficient applications.
- TTL Compatibility: Ensures seamless integration with other TTL logic devices.
- Wide Operating Temperature Range: Suitable for industrial and commercial environments.
Applications
The SN74LS74ANS is widely used in various digital logic applications, including:
- Sequential Logic Circuits: Used in counters, shift registers, and state machines.
- Data Storage: Acts as a basic memory element in digital systems.
- Signal Synchronization: Ensures proper timing and synchronization in complex digital circuits.
- Embedded Systems: Integrated into microcontrollers and FPGA-based designs for logic operations.
- Industrial Automation: Utilized in control systems and process automation.
- Consumer Electronics: Found in devices like gaming consoles, smart appliances, and communication systems.
Q & A
1. What is the operating voltage range of the SN74LS74ANS?
The operating voltage range is 4.75V to 5.25V, with a typical value of 5V.
2. Is the SN74LS74ANS compatible with TTL logic levels?
Yes, it is fully compatible with TTL logic levels.
3. What is the purpose of the asynchronous clear and preset inputs?
These inputs allow you to directly set or reset the flip-flop state, independent of the clock signal.
4. Can the SN74LS74ANS be used in high-temperature environments?
It is designed for commercial applications with an operating temperature range of 0°C to 70°C. For higher temperatures, consider industrial-grade alternatives.
5. What is the typical propagation delay of this device?
The typical propagation delay is 20 nanoseconds.
6. How many flip-flops are included in the SN74LS74ANS?
It contains two independent D-type flip-flops.
7. What package type does the SN74LS74ANS come in?
It is available in a PDIP-14 (Plastic Dual In-Line Package) format.
8. Is the SN74LS74ANS suitable for low-power applications?
Yes, it features low power consumption, making it ideal for energy-efficient designs.
9. Can this device be used in frequency division circuits?
Yes, it can be used in frequency division and other sequential logic applications.
10. Where can I find the datasheet for the SN74LS74ANS?
The datasheet is available on the official Texas Instruments website or authorized distributors like Digi-Key and Mouser.
