74LS244 DIP Octal Buffer and Line Driver with Non-Inverting 3-State Outputs
The 74LS244 is a high speed TTL integrated circuit designed to be used as a memory address driver, clock driver, and bus-oriented transmitter/receiver. This device provides eight non-inverting buffers with 3-state outputs, organized into two groups of four. It is specifically engineered to improve both the performance and the board density of 3-state data paths, providing a high-speed interface between different system components.
Each 4-bit section is controlled by its own active-low output-enable (G) input. When the enable input is low, the data at the inputs is transferred to the outputs in a non-inverted format. When the enable input is high, the outputs enter a high-impedance state, which prevents the device from loading the bus and allows other devices to communicate. The 74LS244 features high-current drive capabilities and significantly improved noise margins, making it ideal for driving high-capacitance loads like memory arrays and backplanes.
KEY FEATURES
- Octal non-inverting buffers for high-density system designs
- 3-state outputs for seamless integration with data buses
- Two 4-bit groups with independent active-low enable controls
- High-current sink and source capability for driving long transmission lines
- Low power Schottky technology for high speed with reduced power consumption
- Standard 20 pin dual in line package
SPECIFICATIONS
- Supply Voltage 4.75V to 5.25V
- Operating Temperature 0 to 70 Celsius
- Logic Type TTL Low Power Schottky
- Typical Propagation Delay 12ns
- High Level Output Current -15mA
- Low Level Output Current 24mA
- Input Voltage High 2.0V Minimum
INTERFACES
- 1A1 to 1A4 Data inputs group 1
- 2A1 to 2A4 Data inputs group 2
- 1G BAR Output enable group 1 active low
- 2G BAR Output enable group 2 active low
- 1Y1 to 1Y4 Non-inverted outputs group 1
- 2Y1 to 2Y4 Non-inverted outputs group 2
- VCC Positive supply voltage
- GND Ground reference
