Overview
The SN74AC244PWR is an octal buffer and line driver integrated circuit produced by Texas Instruments. This device is part of the SN74AC244 series, 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 supply voltage range of 2V to 6V and is organized as two 4-bit buffers or drivers with separate output-enable (OE) inputs. When the OE input is low, the device passes non-inverted data from the A inputs to the Y outputs, and when the OE input is high, the outputs are in the high-impedance state.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 6 | V | |
| VI Input Voltage | -0.5 | VCC + 0.5 | V | |
| VO Output Voltage | -0.5 | VCC + 0.5 | V | |
| IIK Input Clamp Current | ±20 | mA | ||
| IOK Output Clamp Current | ±20 | mA | ||
| IO Continuous Output Current | ±50 | mA | ||
| Tstg Storage Temperature | -65 | 150 | °C | |
| tPLH Propagation Delay (A to Y) | 1.5 | 5 | 7 | ns |
| tPHL Propagation Delay (A to Y) | 1.5 | 5 | 7 | ns |
| tPZH Output Enable Time to High Impedance | 1.5 | 5 | 7 | ns |
| tPZL Output Enable Time to Low Impedance | 1.5 | 5.5 | 8 | ns |
Key Features
- Operation over a supply voltage range of 2V to 6V
- Inputs accept voltages up to 6V
- Maximum propagation delay of 7.5ns at 5V
- Separate output-enable (OE) inputs for each 4-bit buffer
- High-impedance state when OE is high
- Low power consumption
- Available in various packages including TSSOP, SSOP, SOIC, PDIP, and SOP
Applications
- Servers and network switches
- LED displays
- Telecom infrastructure
- Motor-drive control boards
Q & A
- What is the operating voltage range of the SN74AC244PWR?
The SN74AC244PWR operates over a supply voltage range of 2V to 6V.
- What is the maximum propagation delay at 5V?
The maximum propagation delay at 5V is 7.5ns.
- How do the output-enable (OE) inputs function?
When the OE input is low, the device passes non-inverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state.
- What are the typical applications of the SN74AC244PWR?
Typical applications include servers and network switches, LED displays, telecom infrastructure, and motor-drive control boards.
- What are the available package types for the SN74AC244PWR?
The device is available in TSSOP, SSOP, SOIC, PDIP, and SOP packages.
- What is the maximum continuous output current?
The maximum continuous output current is ±50 mA.
- What is the storage temperature range?
The storage temperature range is -65°C to 150°C.
- How do I handle unused inputs on the device?
All unused inputs of the device must be held at VCC or GND for proper device operation.
- What is the significance of the high-impedance state during power-up or power-down?
During power-up or power-down, the OE should be tied to VCC through a pullup resistor to ensure the outputs are in the high-impedance state.
- Where can I find detailed documentation and support for the SN74AC244PWR?
Detailed documentation and support can be found on the Texas Instruments website, including datasheets and application notes.
