Overview
The SN74HC244DW is an octal buffer and line driver produced by Texas Instruments. This device is part of the 74HC series, known for its high-performance and low-power CMOS logic. The SN74HC244DW is specifically designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It operates within a wide voltage range of 2 V to 6 V, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | 2 | 6 | V | |
| Input Clamp Current (IIK) | ±20 | mA | ||
| Output Clamp Current (IOK) | ±20 | mA | ||
| Continuous Output Current (IO) | ±35 | mA | ||
| Junction Temperature (TJ) | 150 | °C | ||
| Storage Temperature (Tstg) | -65 | 150 | °C | |
| Output Drive at 5 V | ±6 | mA | ||
| Input Current (II) | ±1000 | nA | ||
| Quiescent Current (ICC) | 80 | µA | ||
| Propagation Delay (tpd) at VCC = 4.5 V, CL = 50 pF | 29 | 42 | ns |
Key Features
- Wide Operating Voltage Range: 2 V to 6 V, making it suitable for a variety of applications.
- High-Current Outputs: Capable of driving up to 15 LSTTL loads.
- 3-State Outputs: Can drive bus lines or buffer memory address registers, with outputs in a high-impedance state when the output-enable (OE) input is high.
- Low Power Consumption: Maximum quiescent current (ICC) of 80 µA.
- Fast Switching Times: Typical propagation delay of 11 ns.
- Low Input Current: Maximum input current of 1 µA.
- Multiple Package Options: Available in SSOP, SOIC, PDIP, SOP, and TSSOP packages.
Applications
- Servers: For high-speed data transfer and buffering.
- LED Displays: To drive LED segments efficiently.
- Network Switches: For reliable and fast data transmission.
- Telecom Infrastructure: To support high-speed communication networks.
- Motor Drivers: For controlling motor operations with precise timing.
- I/O Expanders: To extend the input/output capabilities of microcontrollers.
Q & A
- What is the operating voltage range of the SN74HC244DW?
The operating voltage range is from 2 V to 6 V.
- How many LSTTL loads can the SN74HC244DW drive?
It can drive up to 15 LSTTL loads.
- What is the function of the output-enable (OE) input?
When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.
- What is the maximum quiescent current (ICC) of the SN74HC244DW?
The maximum quiescent current is 80 µA.
- What are the typical propagation delay times for the SN74HC244DW?
The typical propagation delay is around 11 ns.
- What are the package options available for the SN74HC244DW?
It is available in SSOP, SOIC, PDIP, SOP, and TSSOP packages.
- What are some common applications of the SN74HC244DW?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How does the SN74HC244DW handle input and output currents?
The device has a low input current of 1 µA and can drive ±6 mA at VCC of 5 V.
- What is the junction temperature range for the SN74HC244DW?
The junction temperature range is up to 150 °C.
- What are the thermal resistance values for different packages of the SN74HC244DW?
The thermal resistance values vary by package, such as 109.1 °C/W for SOIC and 131.8 °C/W for TSSOP.
