74HC237D

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74HC237D

IC DECODER 1 X 3:8 16SOIC

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規格

Supplier Rochester Electronics, LLC
Package Bulk
Series 74HC
ProductStatus Active
Type Decoder/Demultiplexer
Circuit 1 x 3:8
IndependentCircuits 1
Current-OutputHighLow 5.2mA, 5.2mA
VoltageSupplySource Single Supply
Voltage-Supply 2V ~ 6V
OperatingTemperature -40°C ~ 125°C
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width)

概述

Description

74HC237D is a high-speed CMOS 3-to-8 line demultiplexer with tri-state outputs. It routes a single data input (D) to one of eight outputs (Y0–Y7) chosen by three select inputs (A, B, C) when the device is enabled.
Key points
- Data path: A single D is demultiplexed to the selected output; other outputs are tri-stated when enabled.
- Enable: Three enable inputs (commonly G1, G2A, G2B) gate the device; when not in the enabling state, all outputs are high-impedance.
- Family/voltage: Part of the 74HC family; typical Vcc = 5V (operates roughly 2–6V).
- Packaging: The “D” suffix indicates a specific package variant (e.g., DIP/SOIC 20-pin, depending on supplier).
Applications
- Routing one data line to multiple busses, address/data decoding, bus arbitration, and simple demuxing in digital systems.
Note: For exact pinout, enable polarity, and timing, consult the manufacturer’s datasheet for the 74HC237D variant you’re using.

Features

- Quad 2-to-1 data selectors (four multiplexers)
- D0–D3 data inputs; Y0–Y3 outputs
- Common select inputs S0 and S1
- Enable input (G) to tri-state all outputs
- Outputs go high-impedance when disabled (bus interface)
- CMOS 74HC technology; operates from 2 V to 6 V
- Fast switching with low power consumption
- Available in 14-pin packages (e.g., DIP, SOIC) as 74HC237D
Note: Provides 4 parallel 2:1 multiplexing with a single enable control for bus sharing.

Package

D stands for DIP. The 74HC237D is a 20‑pin DIP (Plastic DIP) package.

Pinout

20 pins (DIP-20 package). It’s a 3-to-8 line decoder/demultiplexer with tri-state outputs. Features: one data input (D), three select inputs (A, B, C), and an enable (OE). When enabled, D is routed to the selected output Yn (Y0–Y7) based on ABC; all other outputs are low. When disabled, all Y outputs are high-impedance. Power and ground pins are included as standard.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational technology company that designs and manufactures semiconductors and integrated circuits (analog and digital ICs); one of the world’s largest semiconductor producers.

Application

Applications of 74HC237D:
- Address decoding and chip-select generation in microprocessor/memory systems.
- Demultiplexing a 3-bit control/address bus to one-hot eight-output lines for peripheral enables.
- Digital routing and one-of-eight selection in state machines and timing/control circuits.
- Simple bus control and module selection in digital systems where multiple devices are enabled by a 3-bit select with enables.

Equivalent

Direct equivalent: SN74HC237D (TI). Other common equivalents by family:
- 74LS237 (TTL)
- 74ACT237 / 74AC237 (Advanced CMOS)
- 74HCT237 (TTL-compatible inputs)
- 74LVC237 (low-voltage CMOS, 1.65–3.6V)
Notes: all are 3-to-8 decoders/demultiplexers with three enable inputs and tri-state outputs; verify voltage and pinout for your design.

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