Overview
The SN74AVC1T45DCKT, produced by Texas Instruments, is a single-bit noninverting bus transceiver that utilizes two separate configurable power-supply rails. This device is designed for asynchronous communication between two data buses and is operational with supply voltages as low as 1.2V. The A port tracks VCCA, and the B port tracks VCCB, both of which can accept supply voltages ranging from 1.2V to 3.6V. This allows for universal low-voltage, bidirectional translation between various voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V.
The device features a direction-control (DIR) input that activates either the B-port outputs or the A-port outputs, enabling data transmission between the two buses. It is fully specified for partial-power-down applications using Ioff circuitry, which prevents damaging current backflow when the device is powered down. The VCC isolation feature ensures both ports are in a high-impedance state if either VCC input is at GND.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA, Supply voltage | -0.5 | 4.6 | V |
| VCCB, Supply voltage | -0.5 | 4.6 | V |
| Input voltage (A port) | -0.5 | VCCA + 0.5 | V |
| Input voltage (B port) | -0.5 | VCCB + 0.5 | V |
| Operating free-air temperature | -40 | 85 | °C |
| High-level output current (IOH) at 3.3V | -12 | mA | |
| Low-level output current (IOL) at 3.3V | 12 | mA | |
| Input transition rise and fall time | 5 | ns/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.
- Latch-up performance exceeds 100mA per JESD 78, Class II.
- ESD protection exceeds JESD 22: ±2000V Human Body Model, 200V Machine Model, and ±1000V Charged-Device Model.
Applications
- Personal electronic devices.
- Industrial applications.
- Enterprise systems.
- Telecom equipment.
Q & A
- What is the operating voltage range for the SN74AVC1T45? The device operates with supply voltages ranging from 1.2V to 3.6V for both VCCA and VCCB.
- What is the purpose of the DIR input in the SN74AVC1T45? The DIR input activates either the B-port outputs or the A-port outputs, controlling the direction of data transmission between the two buses.
- What is the VCC isolation feature in the SN74AVC1T45? If either VCC input is at GND, both ports are in the high-impedance state.
- What is the maximum data rate supported by the SN74AVC1T45? The device supports data rates up to 500Mbps for 1.8V to 3.3V translation.
- Is the SN74AVC1T45 suitable for partial-power-down applications? Yes, the device is fully specified for partial-power-down applications using Ioff circuitry.
- What is the ESD protection level of the SN74AVC1T45? The device exceeds JESD 22 standards with ±2000V Human Body Model, 200V Machine Model, and ±1000V Charged-Device Model.
- What is the operating temperature range of the SN74AVC1T45? The device operates over a temperature range of -40°C to 85°C.
- What is the output drive capability of the SN74AVC1T45 at 3.3V? The device can drive ±12mA at 3.3V.
- Is the SN74AVC1T45 available in different package options? Yes, it is available in various packages including SOT-SC70 (DCK), SOT-23 (DBV), SOT-5X3 (DRL), and DSBGA (YZP).
- What is the significance of the NanoFree™ package technology used in the SN74AVC1T45? The NanoFree™ package technology uses the die as the package, representing a major breakthrough in IC packaging concepts.
