Overview
The SN74LV244A, produced by Texas Instruments, is an octal buffer and line driver designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. These devices operate within a voltage range of 2 V to 5.5 V, making them versatile for various applications. The SN74LV244A is organized as two 4-bit line drivers with separate output-enable (OE) inputs, allowing for precise control over data transmission.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Operation Range | 2 V to 5.5 V | V |
| Maximum Propagation Delay (tpd) at 5 V | 6.5 ns | ns |
| Typical Output Ground Bounce (VOLP) at VCC = 3.3 V, TA = 25°C | < 0.8 V | V |
| Typical Output VOH Undershoot (VOHV) at VCC = 3.3 V, TA = 25°C | > 2.3 V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | TSSOP (20 pins) | |
| Package Dimensions | 6.50 mm × 4.40 mm | mm |
Key Features
- Operates from 2 V to 5.5 V VCC
- 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 (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model)
- Supports live insertion, partial-power-down mode, and back-drive protection
Applications
The SN74LV244A is suitable for a variety of applications, including:
- 3-state memory address drivers
- Clock drivers
- Bus-oriented receivers and transmitters
- Buffering or incorporating delays between signals between microcontrollers or peripheral devices
- High-speed applications requiring low propagation delay
- Power-efficient circuits due to partial-power-down mode
Q & A
- What is the operating voltage range of the SN74LV244A?
The SN74LV244A operates from 2 V to 5.5 V.
- What is the maximum propagation delay of the SN74LV244A at 5 V?
The maximum propagation delay is 6.5 ns at 5 V.
- What type of package is the SN74LV244APWRG4 available in?
The SN74LV244APWRG4 is available in a TSSOP (20-pin) package.
- What are the dimensions of the TSSOP package?
The TSSOP package dimensions are 6.50 mm × 4.40 mm.
- Does the SN74LV244A support mixed-mode voltage operation?
Yes, it 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.
- What kind of ESD protection does the SN74LV244A have?
The device has ESD protection exceeding JESD 22 (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model).
- Can the SN74LV244A be used in power-efficient circuits?
Yes, it supports partial-power-down mode operation, making it suitable for power-efficient circuits.
- How do the output-enable (OE) inputs function?
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 is the typical output ground bounce (VOLP) at VCC = 3.3 V, TA = 25°C?
The typical output ground bounce is less than 0.8 V.
