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74HC238PW

Name: 74HC238PW
Rating: 4.7 (12 reviews)

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

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概述

Description

The 74HC238PW is a high-speed, low-power 3-to-8 line decoder/demultiplexer integrated circuit. It features three binary inputs (A0, A1, A2) that select one of the eight outputs (Y0 to Y7) to be activated, while all other outputs remain inactive. This device operates in the HC (high-speed CMOS) logic family, allowing it to function at a wide voltage range (2V to 6V) and deliver fast switching speeds, making it suitable for various digital applications.
The 74HC238PW supports enable inputs (G1, G2A, G2B) that control the device's operation; when enabled, it decodes the input binary values into a unique active low output. This functionality is often leveraged in memory address decoding, data routing, and signal demultiplexing.
Its compact package makes it ideal for space-constrained applications, and its compatibility with standard CMOS logic levels ensures easy integration into existing circuits. Overall, the 74HC238PW is widely used in digital electronics for efficient signal management.

Features

The 74HC238PW is a high-speed CMOS 3-to-8 line decoder/demultiplexer. Key features include:
1. Functionality: It decodes a 3-bit binary input (A0, A1, A2) to select one of eight outputs (Y0 to Y7), with the selected output being low while all others are high.
2. Enable Inputs: It includes three enable inputs (E1, E2, E3) that control the device operation, allowing for flexibility in circuit design.
3. High-Speed Operation: The device is capable of operating at high speeds, with propagation delays typically around 6 ns at Vcc = 5V.
4. Wide Voltage Range: It operates over a supply voltage range of 2V to 6V, making it versatile for various applications.
5. Low Power Consumption: The 74HC238PW features low power dissipation, suitable for battery-operated devices.
6. Package Type: It comes in a TSSOP (Thin Shrink Small Outline Package), which is compact for space-constrained applications.
These features make the 74HC238PW ideal for use in data routing, memory addressing, and signal demultiplexing applications.

Package

The 74HC238PW is packaged in a TSSOP (Thin Shrink Small Outline Package) with 16 pins.

Pinout

The 74HC238PW is a 3-to-8 line decoder/demultiplexer with a pin count of 16. It is designed for use in digital circuits to decode a 3-bit binary value into one of eight output lines, with the active output being low.
Pin Functionality:
- Pins 1-3 (A0, A1, A2): Input address lines (3 bits).
- Pins 4, 5 (G1, G2A, G2B): Enable inputs; G1 must be high and both G2A and G2B must be low for the outputs to be activated.
- Pins 6-13 (Y0-Y7): Output lines (8 outputs); one of these outputs is activated low based on the binary value of the input lines.
- Pin 14 (VCC): Power supply (typically +2V to +6V).
- Pin 8 (GND): Ground connection.
- Pin 15 (NC): Not connected (no internal connection).
This IC finds applications in memory address decoding and data routing in digital systems.

Manufacturer

The 74HC238PW is manufactured by Texas Instruments (TI), a leading technology company known for designing and manufacturing semiconductors and various integrated circuits. Founded in 1930 and headquartered in Dallas, Texas, Texas Instruments specializes in a wide range of electronics, including analog and digital signal processing, embedded processors, and microcontrollers. The company serves various industries, including automotive, industrial, consumer electronics, and communications, making it a key player in the global semiconductor market. Texas Instruments is recognized for its innovation, extensive product portfolio, and commitment to advancing technology in diverse applications.

Application

The 74HC238PW is a 3-to-8 line decoder/demultiplexer. It is commonly used in applications such as memory address decoding, data routing, and multiplexing. Its ability to convert binary inputs into a single active output makes it ideal for selecting among multiple devices, controlling LED displays, and enabling or disabling specific circuits. Additionally, it is utilized in digital signal processing and communication systems for efficient data management and routing.

Equivalent

The 74HC238PW chip is a 3-to-8 line decoder/demultiplexer. Equivalent products include:
- 74HCT238 (TTL compatible)
- 74AC238 (faster AC series)
- 74ALS238 (advanced low-power Schottky)
- 74F238 (fast CMOS)
- CD74HC238 (from Texas Instruments)

These alternatives share similar functionalities and pin configurations but may differ in speed, power consumption, and logic levels. Always check datasheets for specific requirements.