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Name: SN74HC132DR
Brand: Texas Instruments
SKU: SN74HC132DR
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 SN74HC132DR

Part No.:: SN74HC132DR

Manufacturer:: Texas Instruments

Package:: 14-SOIC

Datasheet:: SN74HC132DR.pdf

Description:: IC GATE NAND 4CH 2-INP 14SOIC

In Stock:: 2208

Quantity:: Add To Cart

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SN74HC132DR Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
Series:
74HC
ProductStatus:
Active
LogicType:
NAND Gate
NumberofCircuits:
4
NumberofInputs:
2
Features:
Schmitt Trigger
Voltage-Supply:
2V ~ 6V
Current-Quiescent(Max):
2 µA
Current-OutputHighLow:
5.2mA, 5.2mA
LogicLevel-Low:
0.3V ~ 1.2V
LogicLevel-High:
1.5V ~ 4.2V
MaxPropagationDelay@VMaxCL:
21ns @ 6V, 50pF
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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SN74HC132DR information

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SN74HC132DR Typical application Circuitry

SN74HC132DR

The SN74HC132DR is a quad 2-input NAND Schmitt trigger. It's designed to provide Schmitt-trigger functionality, which means it exhibits hysteresis, making it immune to small variations on the input signals, and thus ideal for noisy environments. It's used for wave shaping, signal conditioning, and in applications where noise immunity and input threshold stability are crucial.

Functional Overview

The SN74HC132DR contains four independent 2-input NAND gates with Schmitt-trigger action on each input. It's capable of transforming irregular input signals into well-defined output signals, making it invaluable in digital circuits that require clean and stable transitions.

Application Scenarios

The SN74HC132DR is commonly used in signal conditioning, debouncing circuits for mechanical switches, square wave generation, and in applications where signals need to be cleaned up from noise.

Characteristic Parameters

- Supply Voltage (Vcc): Typically operates between 2V and 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 (IO): Capable of sourcing or sinking up to 6 mA.

- Hysteresis Voltage (Vh): Provides noise immunity and clean switching.

Circuit Integration: Debouncing a Mechanical Switch

In this scenario, the SN74HC132DR is used to debounce a mechanical switch, ensuring that the noisy signal generated by the physical contact bounce is converted into a clean digital signal.

1. Stable Power Supply Integration

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

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

2. Input Configuration

- Input A (Pins 1, 5, 9, 12): Connect these pins to one side of the mechanical switches. If fewer than four switches are used, tie unused inputs to Vcc or Ground depending on the desired inactive state.

- Input B (Pins 2, 6, 10, 13): Connect these pins to Vcc. For the SN74HC132DR to function as a debouncer, each gate only needs one of its inputs connected to a switch.

3. Output Connection

- Output Y (Pins 3, 4, 8, 11): Connect these pins to the input of the device that will read the switch state (like a microcontroller or other logic gates).

4. Feedback Loop for Edge Detection (Optional)

- If edge detection is required (to detect press/release events), additional circuitry might be needed to compare the current state with the previous state.

Design Considerations

When designing circuits with the SN74HC132DR, several key factors should be taken into account:

1. Power Supply Quality: Ensure a stable power supply to prevent malfunctioning of the gates.

2. Input Signal Conditioning: While the Schmitt-trigger action provides noise immunity, extremely noisy environments might require additional filtering.

3. Output Load Handling: Consider the current sourcing/sinking capability when connecting outputs to other devices.

4. Unused Inputs Management: Define the state of unused inputs to prevent them from floating, which can lead to unpredictable behavior.

In summary, the SN74HC132DR is a robust component in digital systems where noise immunity and signal stability are paramount. Its implementation in a switch debouncing circuit underlines its capability to provide clean, stable transitions from noisy inputs. Attention to power supply quality, input signal conditioning, and proper input/output management is crucial in harnessing the full potential of the SN74HC132DR, making it a versatile and reliable choice in the realm of digital electronics. Whether it's for debouncing, signal conditioning, or wave shaping, the SN74HC132DR proves to be an essential component in achieving clean and stable digital logic operations.

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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.

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