規格
| 屬性 | 價值 |
| Supplier | Rochester Electronics, LLC |
| Package / Case | Bulk |
| Series | 74HC |
| Part Status | Active |
| Type | Decoder/Demultiplexer |
| Circuit | 1 x 3:8 |
| Independent Circuits | 1 |
| Current - Output High Low | 5.2mA, 5.2mA |
| Voltage Supply Source | Single Supply |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
概述
Description
74HC237D is a 74HC-series 3-to-8 decoder/demultiplexer with tri‑state outputs. It decodes a 3-bit input (A, B, C) into one of eight outputs (Y0–Y7). It also has three enable inputs: G1 (active HIGH) and G2A, G2B (both active LOW). When the enables are in the correct state, the selected output follows the A–C code; all other outputs are high‑impedance. Used as a demultiplexer, a data input D can be routed to the selected output when enabled. Typical supply is 4.5–5.5 V (HC family) with fast CMOS speeds. Package suffix D usually denotes a specific package type (e.g., SOIC/DIP). Common applications include address decoding, bus sharing, and peripheral isolation in microprocessor/microcontroller systems. For exact truth table, input levels, and timing, consult the specific datasheet for the 74HC237D variant.
Equivalent
Quad 2-to-1 data selector/multiplexer with 3-state outputs. Equivalents in other logic families:
- 74LS237
- 74HCT237
- 74ACT237
- 74LVC237
Note: choose based on input/output voltage compatibility and OE polarity; these offer the same function with different speed/voltage specs.
- 74LS237
- 74HCT237
- 74ACT237
- 74LVC237
Note: choose based on input/output voltage compatibility and OE polarity; these offer the same function with different speed/voltage specs.
Features
Here are the key features of the 74HC237D:
- 3-to-8 line demultiplexer
- 1 data input (D), 3 select inputs (A, B, C)
- 2 enable inputs (G1, G2) to gate the demultiplexing
- 8 outputs (Y0–Y7); D is routed to the selected output when enabled
- When not enabled, all outputs are driven low
- High-speed CMOS (HC) family
- Wide supply voltage: typically 2 V to 6 V
- Low static and dynamic power consumption; TTL/CMOS input compatible
- Automotive/industrial temperature support (typical -40°C to 125°C)
- Package options: DIP-16 and SOIC-16 (D suffix denotes package type)
Applications: address/data routing, simple demux in decoding schemes, bus interfacing.
- 3-to-8 line demultiplexer
- 1 data input (D), 3 select inputs (A, B, C)
- 2 enable inputs (G1, G2) to gate the demultiplexing
- 8 outputs (Y0–Y7); D is routed to the selected output when enabled
- When not enabled, all outputs are driven low
- High-speed CMOS (HC) family
- Wide supply voltage: typically 2 V to 6 V
- Low static and dynamic power consumption; TTL/CMOS input compatible
- Automotive/industrial temperature support (typical -40°C to 125°C)
- Package options: DIP-16 and SOIC-16 (D suffix denotes package type)
Applications: address/data routing, simple demux in decoding schemes, bus interfacing.
Pinout
- Pin count: 16 pins (DIP/SO-16)
- Function: Quad 2-to-1 data selector (multiplexer) with tri-state outputs; each channel selects between D0 and D1 using a common select input, and an enable input tri-states the outputs.
- Function: Quad 2-to-1 data selector (multiplexer) with tri-state outputs; each channel selects between D0 and D1 using a common select input, and an enable input tri-states the outputs.
Manufacturer
Manufacturer: Texas Instruments (TI).
Company type: TI is a multinational semiconductor company that designs and manufactures analog and digital integrated circuits and related electronic components.
Company type: TI is a multinational semiconductor company that designs and manufactures analog and digital integrated circuits and related electronic components.
Application
74HC237D is a 3-to-8 line decoder/demultiplexer with enable inputs. Typical applications include:
- Address decoding and chip-select generation for memory and I/O in microprocessor/m microcontroller systems.
- Peripheral selection and bus control (enables one of eight devices from a 3-bit address).
- Demultiplexing a common bus to multiple outputs.
- Timing, sequencing, and state-machine control signals.
- Simple display/LED drive logic when combined with other gates.
concise and practical use cases for digital design.
- Address decoding and chip-select generation for memory and I/O in microprocessor/m microcontroller systems.
- Peripheral selection and bus control (enables one of eight devices from a 3-bit address).
- Demultiplexing a common bus to multiple outputs.
- Timing, sequencing, and state-machine control signals.
- Simple display/LED drive logic when combined with other gates.
concise and practical use cases for digital design.
Package
The 74HC237D is in a 14‑pin Small Outline Integrated Circuit (SOIC) package. The “D” suffix indicates the SOIC packaging (not DIP).
