AED 7.00
Description
The 74LS74 is a widely used integrated circuit (IC) that belongs to the TTL (Transistor-Transistor Logic) family of digital logic chips. Developed as a dual D-type flip-flop, this versatile IC plays a fundamental role in digital electronics by providing a reliable and efficient means of storing and manipulating binary data. Its popularity stems from its robustness, low power consumption, and ease of implementation in a wide range of electronic projects and systems. The 74LS74 integrates two independent flip-flops within a single package, making it an invaluable component for various applications, including sequential logic circuits, frequency dividers, counters, shift registers, and more. Each flip-flop operates on a clock signal and possesses two inputs, one for data input and the other for clocking purposes. With the ability to store one bit of data in each flip-flop, the 74LS74 enables users to create complex digital circuits capable of processing and synchronizing binary information. Its compatibility with other TTL devices ensures seamless integration with existing digital circuitry, and its compact Dual In-Line Package (DIP) form factor facilitates ease of use on breadboards and PCBs alike. Whether utilized in educational settings to teach basic digital logic concepts or in advanced electronic designs for real-world applications, the 74LS74 continues to be a cornerstone of digital electronics, delivering reliable performance and contributing to the progression of modern technology.
74LS74 Specifications
- Operating Voltage: 2V to 15V.
- Propagation Delay: 40nS.
- Minimum High-Level Input Voltage: 2 V.
- Maximum Low-Level Input Voltage: 0.8V.
- Operating Temperature: 0 to 70°C.
- High-Level Output Current: 8mA.
What is a D-Type Flip-Flop and where to use it?
A clocked flip-flop with two stable states is known as a D-type flip-flop. A D-type flip-flop has an input delay of one clock cycle. Thus, by cascading many D-type flip-flops, delay circuits, which are used in many applications such as digital television systems, can be created. A D-type flip-flop may also be referred to as a D flip-flop or a delay flip-flop.
74LS74 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | 1CLR’ | Resets the flip flop by clearing its memory |
| 2 | 1D | Input pin of the Flip Flop |
| 3 | CLK1 | Clock pin for 1st flip-flop |
| 4 | 1SET’ | Input SET pin for flip-flop |
| 5 | 1Q | Output Pin of the Flip Flop |
| 6 | 1Q’ | The inverted output pin of Flip Flop |
| 7 | GND | Ground |
| 8 | 2Q’ | The inverted output pin of Flip Flop |
| 9 | 2Q | Output Pin of the Flip Flop |
| 10 | 2SET’ | Input SET pin for flip-flop |
| 11 | 2CLK | Clock pin for 2nd flip-flop |
| 12 | 2D | Input pin of the Flip Flop |
| 13 | 2CLR’ | Resets the flip flop by clearing its memory |
| 14 | VCC | Supply Voltage |
74LS74 Truth Table:
|
INPUTS |
OUTPUTS |
||||
|
PRE (bar) |
CLR (bar) |
CLK |
D |
Q |
Q (bar) |
|
L |
H |
X |
X |
H |
L |
|
H |
L |
X |
X |
L |
H |
|
L |
L |
X |
X |
H |
H |
|
H |
H |
|
H |
H |
L |
|
H |
H |
|
L |
L |
H |
|
H |
H |
L |
X |
Q0 |
Q0 (bar) |
Package Includes:
1 x 74LS74 IC