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74HCT138PW
+BOMEncoders, Decoders, Multiplexers & Demultiplexers 3-TO-8 DECODER DEMULTIPLEXER
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メーカーNexperia
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メーカー品番 #74HCT138PW
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データシート 74HCT138PW DataSheet
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在庫状況12191
365 日間品質保証
7*24 日間の品質保証
90-時間単位のサービス保証
1日間のアフターサービス保証
仕様
| 属性 | 値 |
| StandardPackQty | 96 |
概要
Description
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
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
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
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
Application
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.