Overview
The SN74AVC1T45DBVT, produced by Texas Instruments, is a single-bit, dual-supply, noninverting bus transceiver. 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 two separate configurable power-supply rails, VCCA and VCCB, each of which can be supplied with any voltage between 1.2V and 3.6V. The device features a direction-control (DIR) input that determines the direction of data transmission between the A and B ports.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | - |
| Pins | 6 | - |
| Operating Temperature Range | -40 to 85 | °C |
| VCCA/VCCB Voltage Range | 1.2 to 3.6 | V |
| Output Drive at 3.3V | ±12 | mA |
| I/O Tolerance | 4.6 | V |
| Data Rates (1.8V to 3.3V translation) | 500 | Mbps |
| Data Rates (<1.8V to 3.3V translation) | 320 | Mbps |
| ESD Protection (Human Body Model) | ±2000 | V |
| ESD Protection (Machine Model) | 200 | V |
| ESD Protection (Charged-Device Model) | ±1000 | V |
Key Features
- Available in the Texas Instruments NanoFree™ package, which uses the die as the package.
- Fully configurable dual-rail design allows 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.
- I/Os are 4.6V tolerant.
- Ioff supports partial-power-down mode operation.
- High data rates: up to 500Mbps for 1.8V to 3.3V translation.
- ESD protection exceeds JESD 22 standards.
- Latch-up performance exceeds 100mA per JESD 78, Class II.
Applications
- Personal electronic devices.
- Industrial applications.
- Enterprise systems.
- Telecom equipment.
Q & A
- What is the SN74AVC1T45DBVT used for?
The SN74AVC1T45DBVT is used for asynchronous communication between two data buses, providing bidirectional voltage level translation between various voltage nodes.
- What is the voltage range for VCCA and VCCB?
VCCA and VCCB can be supplied with any voltage between 1.2V and 3.6V.
- What is the maximum data rate for 1.8V to 3.3V translation?
The maximum data rate for 1.8V to 3.3V translation is 500Mbps.
- Does the device support partial-power-down mode?
Yes, the device supports partial-power-down mode using Ioff circuitry.
- What is the ESD protection level for the Human Body Model?
The ESD protection level for the Human Body Model is ±2000V.
- What package types are available for the SN74AVC1T45?
The device is available in SOT-23 (DBV), SOT-SC70 (DCK), SOT-5X3 (DRL), and DSBGA (YZP) packages.
- How does the DIR input control data transmission?
The DIR input determines the direction of data transmission between the A and B ports. A high on DIR allows data transmission from A to B, and a low on DIR allows data transmission from B to A.
- What is the significance of the VCC isolation feature?
If either VCC input is at GND, the VCC isolation feature puts both ports in the high-impedance state.
- Is the device I/O tolerant?
Yes, the I/Os are 4.6V tolerant.
- What is the operating temperature range of the device?
The operating temperature range is -40°C to 85°C.
