The TC74HCT138P is a high-speed CMOS 3-to-8 line decoder/demultiplexer manufactured by Toshiba (TOS).
Key Specifications:
- Logic Family: HCT (High-Speed CMOS, TTL compatible)
- Supply Voltage Range (VCC): 4.5V to 5.5V
- Input Voltage (VI): 0V to VCC
- Output Voltage (VO): 0V to VCC
- Operating Temperature Range: -40°C to +85°C
- Propagation Delay (Max): 30 ns (at VCC = 4.5V)
- Input Current (Max): ±1 µA
- Output Current (Max): ±4 mA (High), ±5.2 mA (Low)
- Package: DIP-16 (Plastic Dual In-Line Package)
Features:
- 3-to-8 Line Decoding: Converts 3 binary inputs into 8 mutually exclusive outputs (active LOW).
- Demultiplexing Capability: Can function as a 1-of-8 demultiplexer with an enable input.
- TTL-Compatible Inputs: Works with TTL logic levels (0.8V LOW, 2.0V HIGH).
- Low Power Consumption: CMOS technology ensures minimal power dissipation.
- Three Enable Inputs: Two active LOW (E1, E2) and one active HIGH (E3) for flexible control.
Applications:
- Memory address decoding
- Data routing in digital systems
- Signal demultiplexing
- General-purpose logic circuits
This information is strictly factual and based on Toshiba's official datasheet for the TC74HCT138P.