Overview
The SN74AVC1T45DBVR is a single-bit, noninverting, dual-supply bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between two data buses and supports universal low-voltage, bidirectional translation between various voltage nodes (1.2V, 1.5V, 1.8V, 2.5V, and 3.3V). The SN74AVC1T45 operates with VCCA and VCCB supply voltages ranging from 1.2V to 3.6V, making it versatile for a wide range of applications. The device features a direction-control (DIR) input that determines the direction of data transmission between the A and B ports. It is also fully specified for partial-power-down applications using Ioff, which prevents damaging current backflow when the device is powered down.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | SOT-23 (DBV) | 6 pins |
| Operating Temperature Range | -40°C to 85°C | |
| Supply Voltage Range (VCCA/VCCB) | 1.2V to 3.6V | |
| Output Drive at 3.3V | ±12mA | |
| I/O Tolerance | 4.6V tolerant | |
| Data Rates | 500Mbps (1.8V to 3.3V translation), 320Mbps (<1.8V to 3.3V translation), etc. | |
| ESD Protection | ±2000V Human Body Model, 200V Machine Model, ±1000V Charged-Device Model | |
| Latch-Up Performance | Exceeds 100mA per JESD 78, Class II | |
| Thermal Resistance (Junction-to-Ambient) | 183.4°C/W (DBV package) |
Key Features
- Available in the Texas Instruments NanoFree™ package, which uses the die as the package.
- Fully configurable dual-rail design allowing each port to operate over the full 1.2V to 3.6V power-supply range.
- VCC isolation feature – if either VCC input is at GND, then both ports are in the high-impedance state.
- DIR input circuit referenced to VCCA.
- ±12mA output drive at 3.3V and I/Os are 4.6V tolerant.
- Ioff supports partial-power-down mode operation.
- High data rates for various voltage translations (e.g., 500Mbps for 1.8V to 3.3V translation).
- ESD protection exceeds JESD 22 standards.
Applications
The SN74AVC1T45DBVR is suitable for a variety of applications, including:
- Personal electronics: For voltage translation in portable devices and consumer electronics.
- Industrial: In industrial control systems and automation where different voltage levels are used.
- Enterprise: In server and networking equipment where multiple voltage domains are common.
- Telecom: For telecommunications equipment that requires reliable and efficient voltage translation.
Q & A
- What is the SN74AVC1T45DBVR used for?
The SN74AVC1T45DBVR is a single-bit, noninverting, dual-supply bus transceiver used for asynchronous communication between two data buses and for voltage level translation between different voltage nodes.
- What are the operating voltage ranges for VCCA and VCCB?
VCCA and VCCB can operate within the range of 1.2V to 3.6V.
- What is the maximum output drive current at 3.3V?
The maximum output drive current at 3.3V is ±12mA.
- What is the ESD protection level of the SN74AVC1T45DBVR?
The device has ESD protection exceeding ±2000V Human Body Model, 200V Machine Model, and ±1000V Charged-Device Model.
- What is the purpose of the DIR input?
The DIR input determines the direction of data transmission between the A and B ports.
- Is the SN74AVC1T45DBVR suitable for partial-power-down applications?
Yes, the device is fully specified for partial-power-down applications using Ioff, which prevents damaging current backflow when the device is powered down.
- What is the thermal resistance (junction-to-ambient) for the DBV package?
The thermal resistance (junction-to-ambient) for the DBV package is 183.4°C/W.
- What are some common applications of the SN74AVC1T45DBVR?
Common applications include personal electronics, industrial control systems, enterprise equipment, and telecommunications.
- What is the significance of the NanoFree™ package technology?
The NanoFree™ package technology uses the die as the package, which is a major breakthrough in IC packaging concepts.
- What are the data rates supported by the SN74AVC1T45DBVR for different voltage translations?
The device supports various data rates such as 500Mbps for 1.8V to 3.3V translation, 320Mbps for <1.8V to 3.3V translation, and others depending on the voltage nodes.
