Overview
The SN74AVCH4T245PWRG4 is a 4-bit dual-supply bus transceiver produced by Texas Instruments. This device is designed to facilitate universal low-voltage bidirectional translation between different voltage nodes, making it highly versatile in various electronic systems. The transceiver supports a wide range of voltage levels, from 0.65V to 3.6V, on both A and B ports, enabling seamless communication between different voltage domains.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA Supply Voltage | 0.65 | 3.6 | V |
| VCCB Supply Voltage | 0.65 | 3.6 | V |
| Input Voltage (VI) | -0.5 | 4.2 | V |
| Output Voltage (VO) in High or Low State | -0.5 | VCCA + 0.2 / VCCB + 0.2 | V |
| Continuous Output Current (IO) | -50 | 50 | mA |
| Operating Free-Air Temperature (TA) | -40 | 85 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | 37.5 | 146.9 | °C/W |
Key Features
- Fully configurable dual-rail design allowing each port to operate with a power supply range from 0.65V to 3.6V.
- Universal low-voltage bidirectional translation between different voltage nodes.
- VCC isolation feature that places both ports in a high-impedance state if either VCCA or VCCB is less than 100mV.
- Glitch-Free power supply sequencing, allowing either supply rail to be powered on or off in any order.
- Ioff circuitry disables the outputs to prevent damaging current backflow when the device is powered down.
- Tri-state output-mode enable (OE) to place outputs in tri-state mode.
Applications
- Low-voltage translation in mixed-voltage systems.
- Interface between different voltage domains in electronic systems.
- Use in power sequencing and voltage isolation applications.
- Embedded systems, consumer electronics, and industrial control systems where voltage translation is necessary.
Q & A
- What is the voltage range supported by the SN74AVCH4T245PWRG4?
The device supports a voltage range from 0.65V to 3.6V on both A and B ports.
- What is the purpose of the VCC isolation feature?
The VCC isolation feature places both ports in a high-impedance state if either VCCA or VCCB is less than 100mV, preventing current backflow.
- How does the Ioff circuitry function?
The Ioff circuitry disables the outputs to prevent damaging current backflow when the device is powered down.
- What is the significance of the tri-state output-mode enable (OE) pin?
The OE pin allows the outputs to be placed in tri-state mode by pulling it high.
- What are the thermal characteristics of the SN74AVCH4T245PWRG4?
The device has various thermal resistance values depending on the package type, such as RθJA ranging from 37.5°C/W to 146.9°C/W.
- What is the operating free-air temperature range of the device?
The operating free-air temperature range is from -40°C to 85°C.
- Can the power supply rails be powered on or off in any order?
- What types of packages are available for the SN74AVCH4T245PWRG4?
The device is available in various packages including SOIC, TVSOP, TSSOP, VQFN, and UQFN.
- What are some common applications of the SN74AVCH4T245PWRG4?
Common applications include low-voltage translation in mixed-voltage systems, interface between different voltage domains, and use in power sequencing and voltage isolation applications.
- How does the device handle input and output voltages?
The device can handle input and output voltages within the specified range, and it ensures that the output voltage does not exceed VCCA + 0.2V or VCCB + 0.2V.
