AED 8.30
1
Description
The 74LS138 is a versatile decoder designed for high-performance applications in memory-decoding or data routing. With three binary select inputs and three enable inputs, it efficiently selects one of eight lines. Its compact size and faster speed make it a reliable choice for various devices.
Features:
- Propagation Delay: Very short times for quick response.
- Output: Always in TTL, ensuring compatibility with other TTL devices and microcontrollers.
- Size: Compact design with a smaller footprint.
- Speed: Much faster speed for enhanced reliability.
Specifications:
- Technology Family: LS
- Rating: Catalog
- Supply Voltage: 1.0V to 5.5V
- Frequency at Nominal Voltage: 35 MHz
- Propagation Delay: 21nS (Typical)
- Low Power Consumption: 32mW
- Operating Temperature: -40°C to +125°C
- ESD Protection
- Balanced Propagation Delays
- Specifically Designed for High Speed
- Configuration: 3:8
- Product Type: Standard
74LS138 Pinout:
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | A0 | Address Input Pin A0 |
| 2 | A1 | Address Input Pin A1 |
| 3 | A2 | Address Input Pin A2 |
| 4 | E1′ | Active Low Enable Input E1′ |
| 5 | E2′ | Active Low Enable Input E2′ |
| 6 | E3 | Active high Enable Input E3 |
| 7 | O7′ | Active Low Output pin O7 |
| 8 | GND | Ground Pin |
| 9 | O6′ | Active Low Output pin O6 |
| 10 | O5′ | Active Low Output pin O5 |
| 11 | O4′ | Active Low Output pin O4 |
| 12 | O3′ | Active Low Output pin O3 |
| 13 | O2′ | Active Low Output pin O2 |
| 14 | O1′ | Active Low Output pin O1 |
| 15 | O0′ | Active Low Output pin O0 |
| 16 | Vcc | Chip Supply Voltage |
Applications:
- Speed synchronization of multiple motors in industries.
- War field flying robot with a night vision flying camera.
- Robotic vehicle with a metal detector.