Overview
The SN74AVC1T45DRLR, produced by Texas Instruments, is a single-bit noninverting bus transceiver designed for asynchronous communication between two data buses. This device operates with two separate configurable power-supply rails, allowing each port to function over a wide voltage range from 1.2V to 3.6V. This makes it ideal 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 DIR input circuit referenced to VCCA, enabling the activation of either the B-port outputs or the A-port outputs based on the logic levels of the DIR input. It also includes VCC isolation, which puts both ports in a high-impedance state if either VCC input is at GND. The SN74AVC1T45DRLR is packaged in Texas Instruments' NanoFree™ package, a breakthrough in IC packaging that uses the die as the package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-5X3 (DRL) | |
| Pins | 6 | |
| Operating Temperature Range | -40 to 85 | °C |
| VCCA/VCCB Range | 1.2V to 3.6V | V |
| Output Drive at 3.3V | ±12mA | mA |
| I/O Tolerance | 4.6V | V |
| Maximum Data Rates | 500Mbps (1.8V to 3.3V), 320Mbps (<1.8V to 3.3V), 280Mbps (translate to 1.5V), 240Mbps (translate to 1.2V) | Mbps |
| ESD Protection | ±2000V Human Body Model, 200V Machine Model, ±1000V Charged-Device Model | V |
Key Features
- Available in Texas Instruments' NanoFree™ 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
- I/Os are 4.6V tolerant
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100mA per JESD 78, Class II
- ESD protection exceeds JESD 22 standards
Applications
The SN74AVC1T45DRLR is suitable for a variety of applications requiring voltage level translation between different voltage domains. These include:
- Asynchronous communication between two data buses in mixed-voltage systems
- Low-voltage, bidirectional translation in embedded systems, consumer electronics, and industrial control systems
- Partial-power-down applications where power management is critical
- Systems requiring high-speed data transfer with robust ESD protection
Q & A
- What is the operating voltage range of the SN74AVC1T45DRLR?
The SN74AVC1T45DRLR operates with VCCA/VCCB as low as 1.2V and up to 3.6V.
- What is the maximum data rate supported by the SN74AVC1T45DRLR?
The maximum data rates supported are 500Mbps (1.8V to 3.3V), 320Mbps (<1.8V to 3.3V), 280Mbps (translate to 1.5V), and 240Mbps (translate to 1.2V).
- What is the VCC isolation feature in the SN74AVC1T45DRLR?
If either VCC input is at GND, then both ports are in the high-impedance state.
- What is the output drive capability of the SN74AVC1T45DRLR at 3.3V?
The output drive capability is ±12mA at 3.3V.
- Is the SN74AVC1T45DRLR ESD protected?
- What is the operating temperature range of the SN74AVC1T45DRLR?
The operating temperature range is -40°C to 85°C.
- What package type is the SN74AVC1T45DRLR available in?
- Does the SN74AVC1T45DRLR support partial-power-down mode?
- What is the significance of the NanoFree™ package technology?
- How does the DIR input circuit work in the SN74AVC1T45DRLR?
