SN74LS138N(74LS138) Logic chip
The SN74LS138N is a 3-to-8 line decoder/demultiplexer from the 74LS series of TTL logic ICs. It takes a 3-bit binary input and decodes it into one of eight outputs. Each output corresponds to one of the possible combinations of the three input bits, making it a useful component for addressing memory, selecting data sources, and implementing various digital logic functions. The SN74LS138N features active-low outputs and three enable inputs, allowing for greater flexibility in digital circuit design.
Key Features:
- 3-to-8 line decoder/demultiplexer
- Active-low outputs
- Three enable inputs for cascading or enabling/disabling the device
- High noise immunity
- Fast switching speeds
- Standard 16-pin DIP package
- TTL-compatible inputs and outputs
- Supply Voltage (VCC): 4.75V to 5.25V
- High-Level Input Voltage (VIH): 2V (min)
- Low-Level Input Voltage (VIL): 0.8V (max)
- High-Level Output Voltage (VOH): 2.7V (min) at IOH = -0.4 mA
- Low-Level Output Voltage (VOL): 0.5V (max) at IOL = 8 mA
- Input Current (II): 0.1 mA (max)
- Propagation Delay Time (tpd): 21 ns (typical)
- Operating Temperature Range: 0°C to +70°C
- Package: 16-pin DIP
- Memory Addressing: Used for memory chip selection and address decoding in computer systems.
- Data Selection: Selects data sources in multiplexing applications.
- Digital Circuit Design: Implements various logic functions in digital circuits.
- Control Systems: Acts as a control signal distributor in automated systems.
- Microprocessor Systems: Decodes addresses and controls peripheral devices.
No Specifications