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SN54LS74AJ
+NomenclatureDUAL D-TYPE POSITIVE-EDGE-TRIGGE
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FabricantTexas Instruments
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Pièce fabricant #SN54LS74AJ
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En stock15010
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Spécifications
| Attribut | Valeur |
| 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) |
Présentation
Description
Key features of the SN54LS74AJ include:
- Positive edge-triggered: Data is transferred at the rising edge of the clock pulse.
- Asynchronous set and reset: These inputs allow the flip-flop to be set or reset irrespective of the clock signal.
- TTL-compatible inputs and outputs: Ensures compatibility with other TTL devices.
- High-speed operation and low power consumption: Suitable for high-performance computing needs.
The SN54LS74AJ is widely used in applications requiring temporary data storage, data synchronization, frequency division, and more, making it a versatile component in digital systems. Typically, it is found in military and aerospace applications due to its operational range over extended temperatures.
Equivalent
1. SN74LS74AN
2. CD74HCT74E
3. 74HC74
4. MC74HC74
These equivalents offer similar functionality and may have differences in parameters like speed, power consumption, or packaging, so it's crucial to verify compatibility with the specific requirements of your application.
Features
1. Dual Flip-Flops: Contains two independent flip-flops in a single package.
2. Edge-Triggered: Operates on positive edge of the clock pulse, ensuring accurate data sampling.
3. Preset and Clear Functions: Each flip-flop has asynchronous preset (direct set) and clear (reset) inputs, allowing for immediate setting or clearing of the output state independent of the clock.
4. Complementary Outputs: Provides both Q and Q' (complement) outputs for each flip-flop, facilitating easy design of complementary logic circuits.
5. TTL Compatible: Compatible with TTL (Transistor-Transistor Logic) circuits, ensuring ease of integration into existing TTL systems.
6. Military Grade: The 'SN54' series indicates suitability for military applications, typically offering a wider temperature range and enhanced reliability compared to commercial-grade counterparts.
7. Standard Operating Temperature: Designed for a range typically found in military applications, ensuring performance in more demanding environments.
These features make the SN54LS74AJ suitable for various applications in digital electronics where reliable data storage and retrieval are required.
Pinout
1. 1CLR (Pin 1): Clear input for flip-flop 1.
2. 1D (Pin 2): Data input for flip-flop 1.
3. 1CLK (Pin 3): Clock input for flip-flop 1.
4. 1PR (Pin 4): Preset input for flip-flop 1.
5. 1Q (Pin 5): Non-inverted output for flip-flop 1.
6. 1Q̅ (Pin 6): Inverted output for flip-flop 1.
7. GND (Pin 7): Ground.
8. 2CLR (Pin 8): Clear input for flip-flop 2.
9. 2D (Pin 9): Data input for flip-flop 2.
10. 2CLK (Pin 10): Clock input for flip-flop 2.
11. 2PR (Pin 11): Preset input for flip-flop 2.
12. 2Q (Pin 12): Non-inverted output for flip-flop 2.
13. 2Q̅ (Pin 13): Inverted output for flip-flop 2.
14. VCC (Pin 14): Positive supply voltage.
This IC is used for storing and transferring data, with clear and preset allowing asynchronous control.
Manufacturer
Application
1. Data Storage: Temporary data holding in digital circuits.
2. Frequency Division: Dividing frequency in clock generation circuits.
3. State Machines: Implementing finite state machines in digital systems.
4. Counters: Functioning as a basic building block in counter circuits.
5. Shift Registers: Used in serial-to-parallel or parallel-to-serial data conversion.
Its robust performance over varied environmental conditions makes it ideal for military and aerospace applications.