Overview
The SN74LV244APWRG3, produced by Texas Instruments, is an octal buffer and line driver with 3-state outputs. This device is part of the LV family and is designed for operation over a wide voltage range of 2 V to 5.5 V. It is organized as two 4-bit line drivers, each with its own output-enable (OE) input, allowing for flexible control over data transmission. The SN74LV244A is optimized for high-performance applications, offering low propagation delays and high current drive capabilities, making it suitable for driving digital signals over longer board lengths.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | –0.5 | 7 | V | |
| Input Voltage (VI) | –0.5 | 7 | V | |
| Output Voltage (VO) | –0.5 | VCC + 0.5 | V | |
| Propagation Delay Time (tpd) at VCC = 5 V | 3.9 | 5.5 | 6.5 | ns |
| Output Enable Time (ten) at VCC = 5 V | 4.5 | 7.3 | 8.5 | ns |
| Output Disable Time (tdis) at VCC = 5 V | 6.5 | 12.2 | 13.5 | ns |
| Continuous Output Current (IO) | ±35 | mA | ||
| Junction Temperature (Tj) | –65 | 150 | °C | |
| Storage Temperature (Tstg) | –65 | 150 | °C |
Key Features
- Operates over a wide voltage range of 2 V to 5.5 V.
- Maximum propagation delay of 6.5 ns at VCC = 5 V.
- Typical output ground bounce (VOLP) < 0.8 V at VCC = 3.3 V, TA = 25°C.
- Supports mixed-mode voltage operation on all ports.
- Ioff supports partial-power-down mode operation.
- Latch-up performance exceeds 250 mA per JESD 17.
- Balanced CMOS 3-state outputs capable of driving high, driving low, and high impedance states.
- High current drive capability, suitable for driving digital signals over longer board lengths.
Applications
- Servers and network switches.
- LED displays.
- Telecom infrastructure.
- Motor-drive control boards.
- I/O expanders.
Q & A
- What is the operating voltage range of the SN74LV244A?
The SN74LV244A operates over a voltage range of 2 V to 5.5 V.
- What is the maximum propagation delay at VCC = 5 V?
The maximum propagation delay at VCC = 5 V is 6.5 ns.
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V and TA = 25°C?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Does the SN74LV244A support mixed-mode voltage operation?
Yes, the SN74LV244A supports mixed-mode voltage operation on all ports.
- What is the latch-up performance of the SN74LV244A?
The latch-up performance exceeds 250 mA per JESD 17.
- How are the outputs of the SN74LV244A controlled?
The outputs are controlled by the output-enable (OE) inputs. 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 are the typical applications of the SN74LV244A?
The SN74LV244A is typically used in servers, network switches, LED displays, telecom infrastructure, and motor-drive control boards.
- What is the continuous output current rating of the SN74LV244A?
The continuous output current rating is ±35 mA.
- What is the junction temperature range for the SN74LV244A?
The junction temperature range is –65°C to 150°C.
- How should the output-enable (OE) pin be configured during power up or power down?
The OE pin should be tied to VCC through a pullup resistor to ensure the high-impedance state during power up or power down.
