74HCT138PW

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74HCT138PW

+Nomenclature

Encoders, Decoders, Multiplexers & Demultiplexers 3-TO-8 DECODER DEMULTIPLEXER

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Attribut Valeur
StandardPackQty 96

Présentation

Description

The 74HCT138PW is a high-speed CMOS device, part of the 74HCT series, designed as a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1, A2) and, based on these inputs, activates one of eight mutually exclusive outputs (Y0 to Y7). The device is equipped with active-low enable inputs (E1, E2) and an active-high enable input (E3), providing flexibility for enabling conditions and cascading multiple decoders for applications requiring more output lines.
Key features include TTL-compatible inputs, low power consumption, and a high fan-out capability. The 74HCT138PW operates across a wide voltage range, typically from 4.5V to 5.5V, making it suitable for both 5V logic systems. Its applications include memory decoding, data demultiplexing, and implementing logic functions. The PW suffix indicates the TSSOP package, which is compact, making it suitable for designs with limited space. This decoder is widely used in digital circuits for its reliability and ease of interfacing with other TTL logic families.

Equivalent

The 74HCT138PW is a high-speed CMOS 3-to-8 line decoder/demultiplexer. Equivalent products include:
1. SN74HCT138N (Texas Instruments)
2. MC74HCT138A (ON Semiconductor)
3. CD74HCT138E (Texas Instruments)
4. MM74HCT138 (Fairchild)
5. HEF74HCT138 (NXP)
These alternatives provide similar functionality and are typically pin-compatible, making them suitable replacements in most applications.

Features

The 74HCT138PW is a high-speed CMOS device that functions as a 3-to-8 line decoder/demultiplexer. Key features include:
1. High-Speed Operation: It offers fast switching times, making it suitable for high-performance applications.

2. Low Power Consumption: Designed for minimal power usage, which is ideal for battery-powered devices.
3. Wide Operating Voltage Range: Compatible with TTL (Transistor-Transistor Logic) levels, typically operating between 4.5V and 5.5V.
4. High Noise Immunity: Capable of reducing noise interference, which enhances reliability in various environments.
5. Enable Inputs: Includes three enable inputs (E1, E2, and E3), providing flexibility in selecting active low or high enable modes.
6. Output Drive Capability: Can drive up to 10 low-power TTL loads or two low-power Schottky loads.
7. Pin Compatibility: Offers pin compatibility with the standard 74LS138 series, facilitating easy integration into existing designs.
8. Temperature Range: Operates reliably over a wide temperature range, typically from -40°C to +125°C.
9. Package Options: Available in various package types, such as SO16, to suit different design requirements.

Pinout

The 74HCT138PW is a high-speed CMOS device used as a 3-to-8 line decoder/demultiplexer. It comes in a 16-pin plastic small outline package (SOP). Below are the pin functions:
1. Pin 1 (A0) - Address input
2. Pin 2 (A1) - Address input
3. Pin 3 (A2) - Address input
4. Pin 4 (E1) - Enable input (active LOW)
5. Pin 5 (E2) - Enable input (active LOW)
6. Pin 6 (E3) - Enable input (active HIGH)
7. Pin 7 (Y7) - Output
8. Pin 8 (GND) - Ground
9. Pin 9 (Y6) - Output
10. Pin 10 (Y5) - Output
11. Pin 11 (Y4) - Output
12. Pin 12 (Y3) - Output
13. Pin 13 (Y2) - Output
14. Pin 14 (Y1) - Output
15. Pin 15 (Y0) - Output
16. Pin 16 (VCC) - Supply voltage
This IC decodes three binary weighted address inputs (A0, A1, A2) into one of eight active LOW outputs (Y0 to Y7). The decoder outputs are enabled only when E1 and E2 are LOW and E3 is HIGH.

Manufacturer

The 74HCT138PW is a product manufactured by Nexperia, a global semiconductor company. Nexperia specializes in the production of discrete, logic, and MOSFET devices. Founded in 2016, the company was formed as a spin-off from NXP Semiconductors and has since focused on delivering efficient and reliable semiconductor components. Nexperia is known for its manufacturing expertise and a strong emphasis on high-volume production capabilities, serving various sectors including automotive, industrial, computing, and consumer electronics.

Application

The 74HCT138PW is a high-speed CMOS 3-to-8 line decoder/demultiplexer. It is commonly used in applications requiring data routing, data demultiplexing, and address decoding. Typical application areas include:
1. Memory Decoding: Facilitates the selection of memory banks or chips in microcontroller systems.
2. Data Routing: Directing data signals to different parts of a circuit.
3. Input Expansion: Expands the number of input lines in microcontroller or microprocessor systems.
4. Instruction Decoding: Used in embedded systems for decoding instruction sets.
5. Control Applications: Assists in digital systems requiring multiple control lines.
Its fast switching capabilities and compatibility with high-speed digital systems make it suitable for these purposes.

Package

The 74HCT138PW is a 3-to-8 line decoder/demultiplexer IC, and it comes in a TSSOP (Thin Shrink Small Outline Package) type.

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