Overview
The SN74AVC4T245PW, produced by Texas Instruments, is a 4-bit, dual-supply noninverting bidirectional voltage level translation device. This component is designed to facilitate asynchronous communication between two data buses operating at different voltage levels. It supports voltage translation between any of the low-voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V, making it highly versatile for various electronic systems. The device is optimized for high-speed data rate applications and includes features like partial-power-down mode operation to prevent backflow current.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage Range (VCCA, VCCB) | 1.2 | 3.6 | V |
| Input Voltage Range | -0.5 | 4.6 | V |
| Operating Free-Air Temperature | -40 | 85 | °C |
| Input Transition Rise or Fall Rate | 5 | ns/V | |
| Propagation Delay Time (tPLH, tPHL) at VCCA = VCCB = 1.8V | 2.8 | ns | |
| Output Enable Time (tPZH, tPZL) at VCCA = VCCB = 1.8V | 4.3 | ns | |
| Junction-to-Ambient Thermal Resistance (RθJA) | 101.8 | °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.
- Supports high-speed translation with data rates up to 380Mbps when translating from 1.8V to 3.3V.
- Ioff feature supports partial-power-down mode operation, preventing backflow current by disabling I/O output circuits when the device is powered down.
- Direction-control (DIR) and output-enable (OE) inputs allow for flexible control over data transmission and output states.
- VCC isolation feature ensures both ports are in the high-impedance state if either VCC input is at GND.
Applications
The SN74AVC4T245PW is suitable for a wide range of applications requiring voltage level translation, including:
- Mobile and consumer electronics where different voltage levels are used.
- Industrial control systems that need to interface with various voltage-level devices.
- Automotive systems requiring robust and reliable voltage translation.
- High-speed data communication systems where fast and reliable signal translation is crucial.
Q & A
- What is the voltage range supported by the SN74AVC4T245PW? The device supports voltage translation between any of the low-voltage nodes from 1.2V to 3.6V.
- What is the maximum data rate supported by the SN74AVC4T245PW? The device can support data rates up to 380Mbps when translating from 1.8V to 3.3V.
- How does the Ioff feature work in the SN74AVC4T245PW? The Ioff feature prevents backflow current by disabling I/O output circuits when the device is powered down.
- What is the purpose of the DIR and OE inputs in the SN74AVC4T245PW? The DIR input controls the direction of data transmission, and the OE input enables or disables the output ports.
- What is the VCC isolation feature in the SN74AVC4T245PW? The VCC isolation feature ensures that both ports are in the high-impedance state if either VCC input is at GND.
- What are the typical package options for the SN74AVC4T245PW? The device is available in SOIC, TVSOP, TSSOP, and WQFN packages.
- What is the operating temperature range of the SN74AVC4T245PW? The device operates over a temperature range of -40°C to 85°C.
- How does the SN74AVC4T245PW handle partial-power-down applications? The device includes Ioff circuitry that disables the outputs to prevent damaging current backflow during power-down.
- What is the junction-to-ambient thermal resistance (RθJA) of the SN74AVC4T245PW in the TSSOP package? The RθJA is approximately 101.8°C/W for the TSSOP package.
- Can the SN74AVC4T245PW be used in high-speed data communication systems? Yes, the device is suitable for high-speed data communication systems due to its high data rate capabilities.
