Overview
The SN74HC244DWRE4, produced by Texas Instruments, is an octal buffer and line driver integrated circuit. It is designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The device is organized as two 4-bit buffers and drivers with separate output-enable (OE) inputs. When OE is low, the device passes noninverted data from the A inputs to the Y outputs, and when OE is high, the outputs are in the high-impedance state. This feature makes it ideal for various bus interface applications where output drive and PCB trace length are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage | 2 V to 6 V | V |
| Output Type | 3-State | |
| Propagation Delay Time (at VCC = 2 V) | 165 ns | ns |
| Propagation Delay Time (at VCC = 4.5 V) | 42 ns | ns |
| Propagation Delay Time (at VCC = 6 V) | 35 ns | ns |
| Output Drive Current (at VCC = 5 V) | ±6 mA | mA |
| Input Current (Maximum) | 1 µA | µA |
| Power Consumption (ICC, Maximum) | 80 µA | µA |
| Package Type | 20-SOIC (0.295, 7.50mm Width) | |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- Wide operating voltage range of 2 V to 6 V
- High-current outputs drive up to 15 LSTTL loads
- 3-state outputs drive bus lines or buffer memory address registers
- Low power consumption: ICC, 80 µA (maximum)
- Typical propagation delay time of 11 ns at VCC = 5 V
- ±6 mA output drive at VCC = 5 V
- Low input current of 1 µA (maximum)
- Separate output-enable (OE) inputs for each 4-bit buffer
Applications
- Servers
- LED Displays
- Network Switches
- Telecom Infrastructure
- Motor Drivers
- I/O Expanders
Q & A
- What is the operating voltage range of the SN74HC244DWRE4?
The operating voltage range is 2 V to 6 V.
- How many LSTTL loads can the SN74HC244DWRE4 drive?
The device can drive up to 15 LSTTL loads.
- What is the typical propagation delay time at VCC = 5 V?
The typical propagation delay time is 11 ns.
- What is the output drive current at VCC = 5 V?
The output drive current is ±6 mA.
- What is the maximum power consumption of the SN74HC244DWRE4?
The maximum power consumption is 80 µA.
- What type of outputs does the SN74HC244DWRE4 have?
The device has 3-state outputs.
- What is the package type of the SN74HC244DWRE4?
The package type is 20-SOIC (0.295, 7.50mm Width).
- What is the operating temperature range of the SN74HC244DWRE4?
The operating temperature range is -40°C to 85°C.
- How many bits per element does the SN74HC244DWRE4 have?
The device has 4 bits per element.
- What is the purpose of the separate output-enable (OE) inputs?
The separate OE inputs allow the outputs to be in the high-impedance state when OE is high, and to pass data from the A inputs to the Y outputs when OE is low.
