Overview
The SN74LVC244APWRE4, produced by Texas Instruments, is an octal buffer/line driver with 3-state outputs. This device is designed for asynchronous communication between data buses and operates within a voltage range of 1.65 V to 3.6 V. It is organized as two 4-bit line drivers with separate output-enable (OE) inputs, allowing for flexible control over data transmission. The SN74LVC244APWRE4 is suitable for a wide range of applications requiring reliable and efficient data buffering.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage (VCC) | 1.65 | 3.6 | V |
| Operating Temperature Range | -40 | 125 | °C |
| Input Voltage Range | -0.5 | 6.5 | V |
| Propagation Delay Time (tpd) at VCC = 3.3 V | 5.9 | ns | |
| Output Enable Time (ten) at VCC = 3.3 V | 7.6 | ns | |
| Output Disable Time (tdis) at VCC = 3.3 V | 6.5 | ns | |
| Power Dissipation Capacitance per Buffer/Driver (Cpd) | 44 | pF | |
| ESD Protection | 2000 V (Human-Body Model), 1000 V (Charged-Device Model) |
Key Features
- Operates from 1.65 V to 3.6 V, making it versatile for various voltage environments.
- Inputs accept voltages up to 5.5 V, allowing for mixed-mode signal operation.
- Specified for operation from –40°C to +85°C and –40°C to +125°C, ensuring reliability across a broad temperature range.
- Maximum propagation delay of 5.9 ns at 3.3 V, ensuring fast data transmission.
- Typical output ground bounce (VOLP) < 0.8 V and output overshoot (VOHV) > 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 flexibility and reliability.
- Available in ultra-small logic QFN package with a maximum height of 0.5 mm, suitable for compact designs.
- Latch-up performance exceeds 250 mA per JESD 17, and ESD protection exceeds JESD 22 standards.
Applications
- Asynchronous communication between data buses in various digital systems.
- Buffering and driving signals in low-voltage CMOS, NMOS, and TTL compatible circuits.
- Down translation of inputs from higher voltage levels to the VCC level.
- Use in embedded systems, microcontrollers, and other digital logic circuits requiring reliable data buffering.
Q & A
- What is the operating voltage range of the SN74LVC244APWRE4?
The SN74LVC244APWRE4 operates from 1.65 V to 3.6 V.
- What is the maximum propagation delay time at 3.3 V?
The maximum propagation delay time at 3.3 V is 5.9 ns.
- What is the temperature range for the SN74LVC244APWRE4?
The device is specified for operation from –40°C to +85°C and –40°C to +125°C.
- Does the SN74LVC244APWRE4 support mixed-mode signal operation?
Yes, it supports mixed-mode signal operation on all ports, allowing 5-V input or output voltage with 3.3-V VCC.
- What kind of ESD protection does the SN74LVC244APWRE4 have?
The device has ESD protection exceeding 2000 V (Human-Body Model) and 1000 V (Charged-Device Model).
- How is the output state controlled in the SN74LVC244APWRE4?
The output state is controlled by the output-enable (OE) input. 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 are the typical output ground bounce and overshoot values?
The typical output ground bounce (VOLP) is less than 0.8 V, and the output overshoot (VOHV) is greater than 2 V at VCC = 3.3 V and TA = 25°C.
- Does the SN74LVC244APWRE4 support live insertion and partial-power-down mode?
Yes, it supports live insertion, partial-power-down mode, and back-drive protection.
- What is the latch-up performance of the SN74LVC244APWRE4?
The latch-up performance exceeds 250 mA per JESD 17.
- In what packages is the SN74LVC244APWRE4 available?
The device is available in various packages, including TSSOP (PW), SOIC (DW), SOP (NS), and QFN (RGY).
