Overview
The SN74AVC4T245RGYR, produced by Texas Instruments, is a 4-bit noninverting bus transceiver designed for bidirectional voltage level translation. This device operates with two separate configurable power-supply rails, allowing each port to function over a wide voltage range from 1.2V to 3.6V. It is optimized for universal low-voltage translation between various voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The SN74AVC4T245 is suitable for asynchronous communication between two data buses and features control inputs and output-enable inputs to manage data transmission and high-impedance states.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCCA/VCCB Voltage Range | 1.2V to 3.6V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Maximum Data Rates | 380Mbps (1.8V to 3.3V translation), 200Mbps (< 1.8V to 3.3V translation), 200Mbps (translate to 2.5V or 1.8V), 150Mbps (translate to 1.5V), 100Mbps (translate to 1.2V) | Mbps |
| ESD Protection | 8000V Human-Body Model, 150V Machine Model, 1000V Charged-Device Model | V |
| Package Types | SOIC, TVSOP, TSSOP, UQFN | - |
| Pins | 16 | - |
| Junction-to-Ambient Thermal Resistance (RθJA) | 85.5 to 146.9 °C/W (depending on package) | °C/W |
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.
- ESD protection exceeds JESD 22 standards: 8000V Human-Body Model, 150V Machine Model, 1000V Charged-Device Model.
- Latch-up performance exceeds 100mA per JESD 78, Class II.
- VCC isolation feature ensures both ports are in high-impedance state if either VCC input is at GND.
Applications
- Personal Electronics.
- Industrial applications.
- Enterprise applications.
- Telecom applications.
Q & A
- What is the voltage range for VCCA and VCCB in the SN74AVC4T245? The voltage range for both VCCA and VCCB is from 1.2V to 3.6V.
- What are the maximum data rates supported by the SN74AVC4T245? The device supports various data rates depending on the voltage translation, including 380Mbps, 200Mbps, 150Mbps, and 100Mbps.
- What types of ESD protection does the SN74AVC4T245 offer? The device offers ESD protection exceeding JESD 22 standards: 8000V Human-Body Model, 150V Machine Model, and 1000V Charged-Device Model.
- How does the Ioff feature work in the SN74AVC4T245? The Ioff feature supports partial power-down-mode operation by disabling the outputs and preventing damaging current backflow when the device is powered down.
- What is the purpose of the VCC isolation feature in the SN74AVC4T245? The VCC isolation feature ensures that both ports are in the high-impedance state if either VCC input is at GND.
- What are the package options available for the SN74AVC4T245? The device is available in SOIC, TVSOP, TSSOP, and UQFN packages.
- How many pins does the SN74AVC4T245 have? The device has 16 pins.
- What is the operating temperature range for the SN74AVC4T245? The operating temperature range is from -40°C to 85°C.
- How do the direction-control (DIR) and output-enable (OE) inputs function in the SN74AVC4T245? The DIR input controls the direction of data transmission, and the OE input activates or places the output ports into the high-impedance state.
- What is the significance of the control pins being supplied by VCCA in the SN74AVC4T245? The control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA, ensuring proper control over the device's operation.
