Overview
The SN74LV244APWR, produced by Texas Instruments, is an octal buffer and line driver integrated circuit designed for operation over a wide voltage range of 2 V to 5.5 V. This device is part of the LV family, known for its high current drive capability and low propagation delay, making it suitable for high-speed applications and driving digital signals over longer board lengths. The SN74LV244APWR is organized as two 4-bit line drivers, each with its own output-enable (OE) input, allowing for flexible control over the output states.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5.5 | V | |
| Input Voltage (VI) | -0.5 | 7 | V | |
| Output Voltage (VO) | -0.5 | VCC + 0.5 | V | |
| Propagation Delay (tpd) at VCC = 5 V | 3.9 | 5.5 | 6.5 | ns |
| Output Current (IO) | ±35 | mA | ||
| Junction Temperature (Tj) | -65 | 150 | °C | |
| Storage Temperature (Tstg) | -65 | 150 | °C |
Key Features
- Operates from 2 V to 5.5 V supply voltage.
- Maximum propagation delay of 6.5 ns at 5 V.
- Supports mixed-mode voltage operation on all ports.
- Ioff supports partial-power-down mode operation.
- Latch-up performance exceeds 250 mA per JESD 17.
- ESD protection exceeds JESD 22 standards (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model).
- High current drive capability of up to 16 mA.
- Balanced CMOS 3-state outputs (high, low, and high impedance states).
Applications
- Servers and network switches.
- LED displays.
- Telecom infrastructure.
- Motor-drive control boards.
- Buffering signals on long traces on printed circuit boards or through connectors linking two boards.
- Creating delays between signal lines to match clock or data signal edges.
Q & A
- What is the operating voltage range of the SN74LV244APWR?
The SN74LV244APWR operates from 2 V to 5.5 V. - What is the maximum propagation delay at 5 V?
The maximum propagation delay at 5 V is 6.5 ns. - Does the SN74LV244APWR support mixed-mode voltage operation?
Yes, it supports mixed-mode voltage operation on all ports. - What is the purpose of the Ioff feature in the SN74LV244APWR?
The Ioff feature supports partial-power-down mode operation, disabling outputs and preventing current backflow when powered down. - What are the ESD protection specifications for the SN74LV244APWR?
The device has ESD protection exceeding JESD 22 standards (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model). - How many bits are in each line driver of the SN74LV244APWR?
Each line driver is 4 bits, and there are two such drivers. - What is the function of the output-enable (OE) input?
The OE input controls the output state; when low, it passes data from inputs to outputs, and when high, it puts the outputs in a high-impedance state. - What are some common applications of the SN74LV244APWR?
Common applications include servers, network switches, LED displays, telecom infrastructure, and motor-drive control boards. - How does the SN74LV244APWR handle power-up and power-down states?
To ensure the high-impedance state during power-up or power-down, the OE input must be tied to VCC through a pull-up resistor. - What is the maximum output current of the SN74LV244APWR?
The maximum output current is ±35 mA.
