Overview
The SN74AVC4T245DR is a 4-bit dual-supply bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between two data buses and features configurable voltage-level shifting, allowing it to operate across a wide range of voltage nodes from 1.2V to 3.6V. It is optimized for universal low-voltage bidirectional translation, making it versatile for various applications requiring voltage level translation.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 16-SOIC (0.154", 3.90mm Width) |
| Operating Temperature Range | -40°C to 85°C |
| Voltage - VCCA | 1.2V to 3.6V |
| Voltage - VCCB | 1.2V to 3.6V |
| Data Rate | Up to 380Mbps (depending on voltage translation) |
| Output Type | Tri-State, Non-Inverted |
| Mounting Type | Surface Mount |
| ESD Protection | 8000V Human-Body Model, 150V Machine Model, 1000V Charged-Device Model |
Key Features
- Control inputs VIH/VIL levels are referenced to VCCA voltage.
- Fully configurable dual-rail design allows each port to operate over the full 1.2V to 3.6V power-supply range.
- I/Os are 4.6V tolerant.
- Ioff supports partial power-down-mode operation.
- Maximum data rates vary by voltage translation (e.g., 380Mbps for 1.8V to 3.3V translation).
- Latch-up performance exceeds 100mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 standards.
- VCC isolation feature ensures both ports are in high-impedance state if either VCC input is at GND.
Applications
The SN74AVC4T245DR is suitable for a variety of applications that require bidirectional voltage level translation between different voltage nodes. This includes but is not limited to:
- Mobile and consumer electronics where different voltage levels are used.
- Industrial control systems requiring communication between different voltage domains.
- Automotive systems where voltage level translation is necessary.
- Embedded systems and IoT devices that need to communicate across different voltage levels.
Q & A
- What is the primary function of the SN74AVC4T245DR? The primary function is to act as a 4-bit dual-supply bus transceiver with configurable voltage-level shifting.
- What is the operating temperature range of the SN74AVC4T245DR? The operating temperature range is -40°C to 85°C.
- What are the acceptable voltage ranges for VCCA and VCCB? Both VCCA and VCCB can accept any supply voltage from 1.2V to 3.6V.
- What is the maximum data rate supported by the SN74AVC4T245DR? The maximum data rate is up to 380Mbps, depending on the voltage translation.
- Is the SN74AVC4T245DR ESD protected? Yes, it exceeds JESD 22 standards with 8000V Human-Body Model, 150V Machine Model, and 1000V Charged-Device Model protection.
- How does the device handle partial power-down mode? The device uses Ioff circuitry to disable the outputs and prevent damaging current backflow when powered down.
- What is the package type of the SN74AVC4T245DR? It comes in a 16-SOIC (0.154", 3.90mm Width) package.
- Can the SN74AVC4T245DR operate with different voltage levels on each port? Yes, it allows for universal low-voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.
- How do you put the device in high-impedance state during power up or power down? Tie OE to VCC through a pullup resistor.
- Is the SN74AVC4T245DR suitable for use in safety-critical applications? It is important to refer to the data sheet and application notes for specific guidance on using this device in safety-critical applications.
