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Name: SN74HC74NSR
Brand: Texas Instruments
SKU: SN74HC74NSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments SN74HC74NSR

Part No.:: SN74HC74NSR

Manufacturer:: Texas Instruments

Package:: 14-SO

Datasheet:: SN74HC74NSR.pdf

Description:: IC FF D-TYPE DUAL 1BIT 14SOP

In Stock:: 3119

Quantity:: Add To Cart

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SN74HC74NSR Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
74HC
ProductStatus:
Active
Function:
Set(Preset) and Reset
Type:
D-Type
OutputType:
Complementary
NumberofElements:
2
NumberofBitsperElement:
1
ClockFrequency:
60 MHz
MaxPropagationDelay@VMaxCL:
30ns @ 6V, 50pF
TriggerType:
Positive Edge
Current-OutputHighLow:
5.2mA, 5.2mA
Voltage-Supply:
2V ~ 6V
Current-Quiescent(Iq):
4 µA
InputCapacitance:
3 pF
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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SN74HC74NSR information

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SN74HC74NSR Typical application Circuitry

SN74HC74NSR

The SN74HC74NSR is a dual positive-edge-triggered D-type flip-flop integrated circuit, a variant within the 74HC series known for its robust performance in handling digital information. This IC is adept at maintaining binary states and is instrumental in applications requiring precise control over data flow and signal operation.

Functional Dynamics

The SN74HC74NSR is engineered to capture and retain binary data. It consists of two flip-flops, each with inputs for data (D), clock (CLK), clear (CLR), and preset (PRE). The output reflects the state of the stored bit, toggling only with the appropriate clock signal and control inputs.

Application Spectrum

The SN74HC74NSR finds its utility in diverse digital environments. It's notably effective in sequential circuitry, data storage systems, and input synchronization – essentially anywhere binary data requires precise control and manipulation.

Characteristic Parameters

- Supply Voltage Range (Vcc): Typically from 2V to 6V.

- Input High Voltage (VIH): Usually above 2V for a logical '1'.

- Input Low Voltage (VIL): Typically below 0.8V for a logical '0'.

- Output Current Capacity (IO): Can source or sink up to 4 mA.

- Transition Time (tPHL/tPLH): Dependent on Vcc and load characteristics.

Circuit Implementation: Debounce Circuit for Mechanical Switches

Utilizing the SN74HC74NSR, we can design a circuit to eliminate the noise (bouncing effect) from mechanical switches, ensuring stable digital input signals.

1. Power Configuration

- Vcc (Pin 14): Connect this pin to a +5V source.

- Ground (Pin 7): This pin should be tied to the system ground.

2. Input Arrangement

- Clock Input (CLK, Pin 3 of FF1): Link this to the mechanical switch, the debouncing target.

- Clear Input (CLR, Pin 1 of FF1): Maintain this at a high logic level to ensure active flip-flop operation.

- Preset Input (PRE, Pin 4 of FF1): Keep this at a low logic level, enabling normal flip-flop functionality.

3. Feedback Loop

- Output Q (Pin 5 of FF1): Connect this output back to the Data Input (D, Pin 2 of FF1), establishing a feedback mechanism.

4. Stable Output Extraction

- Output Q (Pin 5 of FF1): Fetch the debounced signal from this pin.

5. Handling Unused Terminals

- Ensure that all unused inputs, particularly the second flip-flop's CLR and PRE, are connected to their respective logic levels to avoid floating states.

Circuit Design Considerations

When architecting circuits with the SN74HC74NSR, it's crucial to be mindful of several aspects:

1. Power Supply Assurance: Ensuring a clean and stable power supply is paramount to prevent inadvertent state transitions.

2. Signal Integrity: The input from the mechanical switch should be free from noise; hence, the debounce circuit's design is critical.

3. Noise Suppression: Incorporating a decoupling capacitor near the Vcc pin can significantly reduce noise, ensuring the SN74HC74NSR operates reliably.

4. Input State Clarity: Defining the state of each input, especially the unused ones, is essential to prevent unpredictable behavior and power wastage.

To encapsulate, the SN74HC74NSR is an integral component in digital circuit design, especially where precision in data handling and signal processing is of the essence. Its implementation in a debounce circuit exemplifies its utility in enhancing signal integrity and system reliability. With careful attention to power supply quality, input signal cleanliness, and proper input configuration, the SN74HC74NSR can significantly uplift the performance and stability of digital systems. Whether in data storage roles or in refining signal inputs, the SN74HC74NSR stands out as a foundational element in the realm of digital electronics.

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of SN74HC74NSR.

(3)The PartNo is unused and only in the original unpacked packaging.

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