Overview
The SN74AVC4T245PWR is a 4-bit, dual-supply noninverting bidirectional voltage level translation device produced by Texas Instruments. This component is designed for asynchronous communication between two data buses, allowing universal low-voltage bidirectional translation between various voltage nodes ranging from 1.2V to 3.6V. The device features two separate configurable power-supply rails, with the A port tracking VCCA and the B port tracking VCCB, each accepting supply voltages from 1.2V to 3.6V. The SN74AVC4T245PWR is optimized for operation with VCCA/VCCB set at 1.4V to 3.6V and is fully functional even at lower voltages down to 1.2V.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Supply Voltage Range (VCCA/VCCB) | Acceptable supply voltage range for both A and B ports | 1.2V to 3.6V |
| Operating Temperature Range | Temperature range for device operation | -40°C to 85°C |
| Maximum Data Rates | Data rates for different voltage translations | 380Mbps (1.8V to 3.3V), 200Mbps (< 1.8V to 3.3V), 200Mbps (translate to 2.5V or 1.8V), 150Mbps (translate to 1.5V), 100Mbps (translate to 1.2V) |
| ESD Protection | Human-Body Model, Machine Model, Charged-Device Model | 8000V, 150V, 1000V respectively |
| Package Type | Type of package the device is available in | TSSOP (PW) with 16 pins |
| I/O Tolerance | Voltage tolerance of the I/Os | 4.6V tolerant |
| Latch-up Performance | Latch-up current per JESD 78, Class II | Exceeds 100mA |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.2V to 3.6V power-supply range.
- Control inputs VIH/VIL levels are referenced to VCCA voltage.
- I/Os are 4.6V tolerant.
- Ioff supports partial power-down-mode operation, preventing damaging current backflow through the device when powered down.
- VCC isolation feature ensures both ports are in the high-impedance state if either VCC input is at GND.
- High ESD protection: 8000V Human-Body Model, 150V Machine Model, 1000V Charged-Device Model.
- Latch-up performance exceeds 100mA per JESD 78, Class II.
Applications
The SN74AVC4T245PWR is suitable for various applications requiring bidirectional voltage level translation, such as:
- Asynchronous communication between two data buses with different voltage levels.
- Low-voltage systems requiring translation between different voltage nodes (e.g., 1.2V, 1.5V, 1.8V, 2.5V, 3.3V).
- Partial power-down applications where Ioff is necessary to prevent current backflow.
- Systems needing high ESD protection and robust latch-up performance.
Q & A
- What is the supply voltage range for the SN74AVC4T245PWR?
The supply voltage range for both VCCA and VCCB is from 1.2V to 3.6V.
- What are the maximum data rates for different voltage translations?
The maximum data rates are 380Mbps (1.8V to 3.3V), 200Mbps (< 1.8V to 3.3V), 200Mbps (translate to 2.5V or 1.8V), 150Mbps (translate to 1.5V), and 100Mbps (translate to 1.2V)).
- What type of package is the SN74AVC4T245PWR available in?
The device is available in a TSSOP (PW) package with 16 pins).
- What is the operating temperature range for the SN74AVC4T245PWR?
The operating temperature range is from -40°C to 85°C).
- Does the SN74AVC4T245PWR support partial power-down mode?
- What is the ESD protection level of the SN74AVC4T245PWR?
The device has high ESD protection: 8000V Human-Body Model, 150V Machine Model, and 1000V Charged-Device Model).
- How does the VCC isolation feature work?
If either VCC input is at GND, both ports are in the high-impedance state).
- What is the latch-up performance of the SN74AVC4T245PWR?
The latch-up performance exceeds 100mA per JESD 78, Class II).
- Are the I/Os of the SN74AVC4T245PWR voltage tolerant?
- How do the direction-control (DIR) and output-enable (OE) inputs function?
The DIR input controls the direction of data transmission, and the OE input activates or places the output ports into the high-impedance state).
