Overview
The 74AHCT138PW,118 is a 3-to-8 line decoder/demultiplexer produced by Nexperia USA Inc. This high-speed Si-gate CMOS device is designed to accept three binary weighted address inputs (A0, A1, and A2) and provide eight mutually exclusive outputs (Y0 to Y7) when enabled. The device is pin compatible with Low power Schottky TTL (LSTTL) and is specified in compliance with JEDEC standard No. 7A.
The 74AHCT138PW,118 operates with TTL input levels, making it versatile for various digital logic applications. It features three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3), allowing for easy parallel expansion and demultiplexing capabilities.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|---|---|
| 74AHCT138PW | 4.5 - 5.5 | TTL | ± 8 | 4.4 | low | -40 to 125 | TSSOP16 |
Key Features
- High-Speed Operation: The device operates with a propagation delay of 4.4 ns.
- Multiple Enable Inputs: Features two active LOW (E1 and E2) and one active HIGH (E3) enable inputs for flexible operation.
- Demultiplexing Capability: Can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- Schmitt-Trigger Action: All inputs have Schmitt-trigger action for improved noise immunity.
- ESD Protection: Includes ESD protection to enhance reliability.
- Low Power Dissipation: Designed for low power dissipation, making it suitable for energy-efficient applications.
- Wide Operating Temperature Range: Operates over a temperature range of -40°C to 125°C.
Applications
- Memory Chip Select Decoding: Ideal for memory chip select decoding due to its decoding capabilities.
- Digital Logic Circuits: Suitable for various digital logic circuits requiring decoding and demultiplexing functions.
- Industrial and Automotive Systems: Can be used in industrial and automotive systems where high-speed and reliable decoding is necessary.
- Consumer Electronics: Applicable in consumer electronics for decoding and demultiplexing tasks.
Q & A
- What is the primary function of the 74AHCT138PW,118?
The primary function is to act as a 3-to-8 line decoder/demultiplexer.
- What are the logic switching levels for the 74AHCT138PW,118?
The device operates with TTL input levels.
- What is the output drive capability of the 74AHCT138PW,118?
The output drive capability is ± 8 mA.
- What is the propagation delay of the 74AHCT138PW,118?
The propagation delay is 4.4 ns.
- What are the enable inputs for the 74AHCT138PW,118?
The device has two active LOW (E1 and E2) and one active HIGH (E3) enable inputs.
- Can the 74AHCT138PW,118 be used as a demultiplexer?
- What is the operating temperature range of the 74AHCT138PW,118?
The operating temperature range is -40°C to 125°C.
- What package type is the 74AHCT138PW,118 available in?
The device is available in a TSSOP16 package.
- Does the 74AHCT138PW,118 have ESD protection?
- What are some common applications of the 74AHCT138PW,118?
