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Name: 74HCT138D,652
Brand: Nexperia USA Inc.
SKU: 74HCT138D,652
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Nexperia USA Inc. 74HCT138D,652

Part No.:: 74HCT138D,652

Manufacturer:: Nexperia USA Inc.

Package:: 16-SOIC (0.154, 3.90mm Width)

Datasheet:: 74HCT138D,652.pdf

Description:: IC DECODER/DEMUX 1 X 3:8 16SO

In Stock:: 2329

Quantity:: Add To Cart

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74HCT138D,652 Specifications

Packaging:
Tube
Series:
74HCT
ProductStatus:
Obsolete
Type:
Decoder/Demultiplexer
Circuit:
1 x 3:8
IndependentCircuits:
1
Current-OutputHighLow:
4mA, 4mA
VoltageSupplySource:
Single Supply
Voltage-Supply:
4.5V ~ 5.5V
OperatingTemperature:
-40°C ~ 125°C
MountingType:
Surface Mount

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74HCT138D,652 information

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74HCT138D,652 Typical application Circuitry

74HCT138D,652

The 74HCT138D,652 is a notable integrated circuit within the 74HC/HCT series, distinguished by its utilization of high-speed Si-gate CMOS technology. This device is a 3-to-8 line decoder/demultiplexer, designed for high efficiency and precision in digital circuits. The 74HCT138D,652, like other devices in the 74HC/HCT series, combines the low power consumption and high noise immunity characteristics of CMOS technology with the logic level compatibility of TTL (Transistor-Transistor Logic). This unique feature set makes it particularly suited for interfacing with both modern CMOS and traditional TTL systems, offering versatility and reliability in a wide range of applications.

1. Series Heritage: As a member of the 74HC/HCT series, the 74HCT138D,652 benefits from the series' innovative approach to combining the operational efficiencies of CMOS technology with the robustness and compatibility of TTL logic levels. This synthesis allows for devices that are highly efficient, with reduced power consumption, and capable of operating reliably in mixed voltage and technology environments.

2. Functional Overview: The 74HCT138D,652 operates as a decoder/demultiplexer by converting three binary-weighted input signals (A0, A1, A2) into one of eight distinct outputs (Y0 to Y7), with only one output being active (LOW) at any given time. This capability is essential in digital systems that require the expansion of control lines or the decoding of address signals for tasks such as memory selection, thereby enhancing system efficiency and scalability.

3. Operating Voltage and Power Connections: The device is designed to operate within a supply voltage (VCC) range of 4.5V to 5.5V, which is typical for 5V digital systems. To ensure proper operation, connect pin 16 (VCC) to a +5V power source, while pin 8 (GND) should be connected to the system's ground. This setup provides a stable reference point for all voltage levels within the circuit, facilitating consistent and reliable operation.

4. Enable Inputs and Decoding Activation: The 74HCT138D,652 includes three enable inputs: G1 (pin 6), G2A (pin 5), and G2B (pin 4). For the decoder to be operational, G1 and G2A need to be LOW (grounded), and G2B should be HIGH (connected to VCC). This configuration is crucial for activating the device's decoding functionality, allowing it to correctly map input signals to their corresponding outputs.

5. Address Inputs and Output Selection: At the heart of the 74HCT138D,652's functionality are its address inputs (A0, A1, A2, pins 1, 2, and 3), which determine the active output among the eight possible (Y0 to Y7). This selection mechanism underscores the device's role in efficiently managing signal routing and selection within a digital circuit.

6. Output Configuration: The outputs (Y0 to Y7, pins 15, 14, 13, 12, 11, 10, 9, and 7) are configured so that only one is active (LOW) at a time, based on the binary value of the address inputs. This design allows for precise control over connected devices or logic elements, showcasing the 74HCT138D,652's utility in complex digital applications.

7. Stabilization with Decoupling Capacitors: To achieve optimal performance, it is advisable to place a 0.1 µF ceramic decoupling capacitor near the VCC and GND pins. This capacitor helps to filter out noise from the power supply, ensuring the stable and reliable operation of the 74HCT138D,652 by preventing potential disturbances.

The 74HCT138D,652 stands as a prime example of the 74HC/HCT series' commitment to delivering high-performance, versatile components that integrate CMOS efficiency with TTL compatibility. This device's precise operational parameters and connection methodology make it a reliable choice for decoding and demultiplexing applications across various digital systems. By providing a detailed guide to its connection and operation, the 74HCT138D,652 demonstrates its capability to enhance the functionality and reliability of digital circuits, solidifying its position as a valuable asset in the realm of electronic components.

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6. What is the process for return or replacement of 74HCT138D,652?

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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 74HCT138D,652.

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