Overview
The SN74LVTH244APWRG4 is an octal buffer and line driver produced by Texas Instruments. This device is designed for low-voltage (3.3-V) VCC operation but also supports a TTL interface in a 5-V system environment. It is organized as two 4-bit line drivers with separate output-enable (OE) inputs, allowing for flexible data transmission and control. The device features active bus-hold circuitry, Ioff and power-up 3-state support, making it suitable for hot-insertion applications and preventing damaging current backflow during power cycles.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW) | - |
| Pins | 20 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.7 to 3.6 | V |
| Input Voltage Range | -0.5 to 7 | V |
| Output Current (Low State) | 64 mA | mA |
| Output Current (High State) | 64 mA | mA |
| Propagation Delay Time (tPLH, tPHL) | 1.1 to 4.1 ns | ns |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model | - |
Key Features
- Support for mixed-mode signal operation (5-V input and output voltages with 3.3-V VCC)
- Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Support for unregulated battery operation down to 2.7 V
- Ioff and power-up 3-state support for hot insertion
- Bus hold on data inputs eliminates the need for external pullup/pulldown resistors
- Latch-up performance exceeds 500 mA per JESD 17
- ESD protection exceeds JESD 22
Applications
The SN74LVTH244APWRG4 is suitable for various applications requiring low-voltage operation and TTL compatibility, such as:
- Embedded systems and microcontrollers
- Communication interfaces (e.g., UART, SPI, I2C)
- Industrial control systems
- Automotive electronics
- Consumer electronics requiring low power consumption
Q & A
- What is the operating voltage range of the SN74LVTH244APWRG4?
The operating voltage range is 2.7 to 3.6 V.
- What type of package does the SN74LVTH244APWRG4 come in?
The device comes in a TSSOP (PW) package with 20 pins.
- What is the maximum output current in the low state?
The maximum output current in the low state is 64 mA.
- Does the SN74LVTH244APWRG4 support hot-insertion applications?
- What is the purpose of the bus-hold circuitry?
The bus-hold circuitry holds unused or floating data inputs at a valid logic level, eliminating the need for external pullup/pulldown resistors.
- What level of ESD protection does the SN74LVTH244APWRG4 offer?
The device offers ESD protection exceeding 2000-V Human-Body Model and 200-V Machine Model.
- How do I ensure the high-impedance state during power up or power down?
OE should be tied to VCC through a pullup resistor to ensure the high-impedance state during power up or power down.
- What is the propagation delay time of the SN74LVTH244APWRG4?
The propagation delay time (tPLH, tPHL) ranges from 1.1 to 4.1 ns.
- Is the SN74LVTH244APWRG4 suitable for automotive applications?
- What is the recommended operating temperature range for the SN74LVTH244APWRG4?
The recommended operating temperature range is -40 to 85°C.
