Overview
The SN74AVC2T45DCURE4, produced by Texas Instruments, is a 2-bit, dual-supply bus transceiver designed for asynchronous communication between two data buses. This device supports universal low-voltage bidirectional translation and level-shifting between various voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. It is particularly useful in mixed-voltage systems where data needs to be transmitted between different voltage domains.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA (Supply Voltage) | -0.5 | 4.6 | V |
| VCCB (Supply Voltage) | -0.5 | 4.6 | V |
| VI (Input Voltage) | -0.5 | 4.6 | V |
| VO (Output Voltage in High-Impedance or Power-Off State) | -0.5 | 4.6 | V |
| IO (Continuous Output Current) | -50 | 50 | mA |
| TA (Operating Free-Air Temperature) | -40 | 85 | °C |
| RθJA (Junction-to-Ambient Thermal Resistance) - DCT Package | 183.1 | °C/W |
Key Features
- Supports universal low-voltage bidirectional translation and level-shifting between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.
- Configurable voltage translation with 3-state outputs.
- Asynchronous communication between two data buses controlled by the DIR pin.
- Input circuitry on both A and B ports always active to prevent excess leakage current.
- Fully specified for partial-power-down applications.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- Available in various packages including DCT (SSOP, 8), DCU (VSSOP, 8), YZP (DSBGA, 8), and DDF (SOT-23, 8).
Applications
- Mixed-voltage systems where data needs to be transmitted between different voltage domains.
- Interface translation in systems with multiple voltage levels.
- Asynchronous communication in embedded systems, industrial control systems, and consumer electronics.
- Partial-power-down applications to manage power consumption efficiently.
Q & A
- What is the primary function of the SN74AVC2T45?
The primary function is to enable asynchronous communication and bidirectional translation between two data buses operating at different voltage levels.
- What are the supported voltage levels for this device?
The device supports voltage levels of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V.
- How is the direction of data transmission controlled?
The direction of data transmission is controlled by the DIR pin, which activates either the B-port outputs or the A-port outputs.
- What are the package options available for this device?
The device is available in DCT (SSOP, 8), DCU (VSSOP, 8), YZP (DSBGA, 8), and DDF (SOT-23, 8) packages.
- Is the device suitable for partial-power-down applications?
Yes, the device is fully specified for partial-power-down applications.
- What is the maximum continuous output current?
The maximum continuous output current is ±50 mA.
- What is the operating temperature range for this device?
The operating temperature range is from -40°C to 85°C.
- How does the device prevent excess leakage current?
The input circuitry on both A and B ports must always have a logic HIGH or LOW level applied to prevent excess leakage current.
- What is the latch-up performance of the device?
The latch-up performance exceeds 100 mA per JESD 78, Class II.
- What are some common applications of this device?
Common applications include mixed-voltage systems, interface translation, and partial-power-down applications in various electronic systems.
