Overview
The SN74LVC244APWRG3, produced by Texas Instruments, is an octal buffer or driver with 3-state outputs. This device is designed for asynchronous communication between data buses and operates over a wide voltage range from 1.65 V to 3.6 V. It is part of the LVC (Low-Voltage CMOS) family, which is known for its low power consumption and high performance.
The SN74LVC244A devices are organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When the OE input is low, the device passes data from the A inputs to the Y outputs, and when the OE input is high, the outputs are in the high-impedance state. This feature makes it versatile for various digital logic applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 1.65 to 3.6 | V |
| Input Voltage Range | -0.5 to 6.5 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Propagation Delay Time (max at 3.3 V) | 5.9 | ns |
| Output Ground Bounce (typical at VCC=3.3 V, TA=25°C) | < 0.8 | V |
| Output Undershoot (typical at VCC=3.3 V, TA=25°C) | > 2 | V |
| Package Type | TSSOP (PW) | |
| Number of Pins | 20 |
Key Features
- Operates from 1.65 V to 3.6 V, making it suitable for a wide range of applications.
- Inputs accept voltages up to 5.5 V, providing flexibility in mixed-mode signal operations.
- Specified from -40°C to +85°C and -40°C to +125°C, ensuring reliability across various temperature conditions.
- Maximum propagation delay time of 5.9 ns at 3.3 V, ensuring high-speed data transfer.
- Typical output ground bounce less than 0.8 V and output undershoot greater than 2 V at VCC=3.3 V and TA=25°C, minimizing signal distortion.
- Supports live insertion, partial-power-down mode, and back-drive protection, enhancing system reliability.
- Can be used as a down translator to translate inputs from a maximum of 5.5 V down to the VCC level.
- Available in ultra-small logic QFN package (0.5 mm maximum height), ideal for space-constrained designs.
- Latch-up performance exceeds 250 mA per JESD 17, and ESD protection exceeds JESD 22 (2000-V human-body model and 1000-V charged-device model).
Applications
- Asynchronous communication between data buses in various digital systems.
- Mixed-mode signal operations where 5-V input or output voltage is required with a 3.3-V VCC.
- High-speed data transfer applications requiring low propagation delay times.
- Systems requiring live insertion, partial-power-down mode, and back-drive protection.
- Space-constrained designs where ultra-small packages are necessary.
- Industrial and automotive applications due to its wide operating temperature range.
Q & A
- What is the operating voltage range of the SN74LVC244APWRG3?
The operating voltage range is from 1.65 V to 3.6 V.
- What is the maximum input voltage the device can accept?
The device can accept input voltages up to 5.5 V.
- What is the propagation delay time at 3.3 V?
The maximum propagation delay time at 3.3 V is 5.9 ns.
- What is the typical output ground bounce at VCC=3.3 V and TA=25°C?
The typical output ground bounce is less than 0.8 V.
- Does the device support live insertion and partial-power-down mode?
- What is the package type and number of pins for the SN74LVC244APWRG3?
The package type is TSSOP (PW) with 20 pins.
- What are the operating temperature ranges for the device?
The device operates from -40°C to +85°C and -40°C to +125°C.
- Does the device have ESD protection?
- Can the device be used in mixed-mode signal operations?
- What is the latch-up performance of the device?
The latch-up performance exceeds 250 mA per JESD 17.
