Overview
The SN74AVC4T245DRG4 is a 4-bit, dual-supply noninverting bidirectional voltage level translation device produced by Texas Instruments. This device is designed for asynchronous communication between two data buses and supports universal low-voltage bidirectional translation between various voltage nodes (1.2V, 1.5V, 1.8V, 2.5V, and 3.3V). The SN74AVC4T245 is optimized to operate with supply voltages ranging from 1.2V to 3.6V, making it suitable for a wide range of applications requiring voltage level translation.
Key Specifications
| Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|
| VCCA/VCCB Supply Voltage Range | 1.2 | 3.6 | V | Acceptable supply voltage range for both A and B ports |
| Input Voltage Range | -0.5 | 4.6 | V | Maximum input voltage range for I/O ports and control inputs |
| Operating Temperature Range | -40 | 85 | °C | Temperature range for device operation |
| Maximum Data Rate (1.8V to 3.3V Translation) | 380 | Mbps | Maximum data rate for signal translation from 1.8V to 3.3V | |
| Ioff (Partial-Power-Down Mode) | Prevents backflow current by disabling I/O output circuits during partial-power-down mode |
Key Features
- Fully Configurable Dual-Rail Design: Allows each port to operate over the full 1.2V to 3.6V power-supply range, enabling universal low-voltage bidirectional translation between different voltage nodes.
- High Speed Translation: Supports high data rate applications with a maximum data rate of up to 380 Mbps when translating signals from 1.8V to 3.3V.
- Ioff Supports Partial-Power-Down Mode Operation: Prevents backflow current by disabling I/O output circuits when the device is in partial-power-down mode.
- VCC Isolation Feature: Ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- 4.6V Tolerant I/Os: Input/output ports are tolerant up to 4.6V, enhancing the device's robustness.
Applications
The SN74AVC4T245 is an excellent choice for level-translation applications, particularly in scenarios where devices or systems operate at different interface voltages. It is suitable for use in various electronic systems that require bidirectional voltage level translation, such as in communication between different voltage domains within a system. The device is also useful in applications where a push-pull driver is connected to the data I/Os.
Q & A
- What is the SN74AVC4T245DRG4 used for?
The SN74AVC4T245DRG4 is used for bidirectional voltage level translation between two data buses operating at different voltage levels.
- What is the acceptable supply voltage range for the SN74AVC4T245?
The acceptable supply voltage range for both VCCA and VCCB is from 1.2V to 3.6V.
- What is the maximum data rate supported by the SN74AVC4T245?
The maximum data rate supported is up to 380 Mbps when translating signals from 1.8V to 3.3V.
- How does the Ioff feature work in the SN74AVC4T245?
The Ioff feature prevents backflow current by disabling I/O output circuits when the device is in partial-power-down mode.
- What is the VCC isolation feature in the SN74AVC4T245?
If either VCC input is at GND, both ports are placed in the high-impedance state.
- What is the operating temperature range of the SN74AVC4T245?
The operating temperature range is from -40°C to 85°C.
- Can the SN74AVC4T245 handle high input voltages?
Yes, the I/O ports and control inputs are tolerant up to 4.6V.
- How do the direction-control (DIR) and output-enable (OE) inputs function?
The DIR input controls the direction of data transmission, while the OE input enables or disables the output ports. When OE is high, both ports are in the high-impedance state.
- What are the typical applications of the SN74AVC4T245?
Typical applications include level-translation in systems where devices operate at different voltage levels, and in scenarios where a push-pull driver is connected to the data I/Os.
- What packages are available for the SN74AVC4T245?
The device is available in SOIC, TVSOP, and TSSOP packages.
