Overview
The SN74LVT244BDWR is an octal buffer and line driver produced by Texas Instruments. This device is specifically designed for low-voltage (3.3-V) VCC operation but also supports mixed-mode signal operation with 5-V input and output voltages. It is organized as two 4-bit line drivers with separate output-enable (OE) inputs, allowing for flexible control over the output states. The device is suitable for applications requiring hot-insertion capabilities and features power-up 3-state circuitry to prevent driver conflict during power transitions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (VCC) | 2.7 to 3.6 | V |
| Input Voltage Range (VI) | -0.5 to 7 | V |
| Output Voltage Range (VO) | -0.5 to 7 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | SOIC (DW) | |
| No. of Pins | 20 | |
| Propagation Delay (tpd) | 3.5 to 3.8 | ns |
| Maximum Power Supply Current (ICC) | 5 | mA |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model | |
| Technology | BICMOS |
Key Features
- Supports mixed-mode signal operation (5-V input and output voltages with 3.3-V VCC)
- Supports unregulated battery operation down to 2.7 V
- Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Ioff and power-up 3-state support for hot insertion
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 standards
- Separate output-enable (OE) inputs for each 4-bit line driver
Applications
The SN74LVT244BDWR is suitable for a variety of applications, including:
- Hot-insertion applications where devices need to be inserted or removed while the system is powered on.
- Mixed-voltage systems where both 3.3-V and 5-V logic levels are used.
- Battery-powered devices that require operation down to 2.7 V.
- Systems requiring low output ground bounce and high ESD protection.
- General-purpose buffering and line driving in digital circuits.
Q & A
- What is the operating voltage range of the SN74LVT244BDWR?
The operating voltage range is from 2.7 V to 3.6 V.
- What is the package type of the SN74LVT244BDWR?
The package type is SOIC (DW) with 20 pins.
- What is the propagation delay of the SN74LVT244BDWR?
The propagation delay is between 3.5 ns and 3.8 ns.
- Does the SN74LVT244BDWR support hot-insertion applications?
Yes, it supports hot-insertion applications with Ioff and power-up 3-state circuitry.
- What kind of ESD protection does the SN74LVT244BDWR offer?
The device offers ESD protection exceeding JESD 22 standards, including 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- How many bits does each line driver in the SN74LVT244BDWR handle?
Each line driver handles 4 bits.
- What is the typical output ground bounce (VOLP) of the SN74LVT244BDWR?
The typical VOLP is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- What is the maximum power supply current (ICC) of the SN74LVT244BDWR?
The maximum power supply current is 5 mA.
- What is the operating temperature range of the SN74LVT244BDWR?
The operating temperature range is from -40°C to 85°C.
- Does the SN74LVT244BDWR have separate output-enable inputs?
Yes, it has separate output-enable (OE) inputs for each 4-bit line driver.
