Overview
The SN74HC244NSRG4, produced by Texas Instruments, is an octal buffer and line driver with 3-state outputs. This device is designed to enhance the performance and density of memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It is organized as two 4-bit buffers and drivers with separate output-enable (OE) inputs. When the OE input is low, the device passes noninverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state, which is crucial for bus applications and memory address registers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2 V to 6 V | V |
| Output Current Drive | ±6 mA at VCC = 5 V | mA |
| Input Current | 1 µA (Maximum) | µA |
| Power Consumption (ICC) | 80 µA (Maximum) | µA |
| Propagation Delay (tpd) | 11 ns (Typical at VCC = 5 V) | ns |
| Output Load Drive Capability | Up to 15 LSTTL loads | - |
| Package Types | SOP, SOIC, SSOP, TSSOP, PDIP | - |
| 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 of 11 ns
- ±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 SN74HC244NSRG4?
The operating voltage range is 2 V to 6 V.
- How many LSTTL loads can the SN74HC244NSRG4 drive?
The device can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HC244NSRG4?
The typical propagation delay is 11 ns at VCC = 5 V.
- What is the maximum power consumption of the SN74HC244NSRG4?
The maximum power consumption is 80 µA.
- What is the output current drive capability of the SN74HC244NSRG4 at VCC = 5 V?
The device can drive ±6 mA at VCC = 5 V.
- How do the output-enable (OE) inputs function on the SN74HC244NSRG4?
When OE is low, the device passes noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.
- What are the available package types for the SN74HC244NSRG4?
The available package types include SOP, SOIC, SSOP, TSSOP, and PDIP.
- What is the operating temperature range of the SN74HC244NSRG4?
The operating temperature range is -40°C to 85°C.
- What are some common applications of the SN74HC244NSRG4?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How should the OE input be managed during power-up or power-down to ensure the high-impedance state?
The OE input should be tied to VCC through a pullup resistor to ensure the high-impedance state during power-up or power-down.
