Overview
The SN74LVC2T45DCURG4, produced by Texas Instruments, is a dual-bit, dual-supply noninverting voltage level translation device. This component is designed to facilitate asynchronous communication between two data buses operating at different voltage levels. It supports a wide range of voltage translations, making it versatile for various applications. The device features fully configurable dual-rail design, allowing each port to operate over the full 1.65-V to 5.5-V power-supply range, which includes common voltage nodes such as 1.8V, 2.5V, 3.3V, and 5V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range (VCCA and VCCB) | 1.65 to 5.5 | V |
| Maximum Data Rate (3.3V to 5V Translation) | 420 | Mbps |
| Maximum Data Rate (Translation to 3.3V) | 210 | Mbps |
| Maximum Data Rate (Translation to 2.5V) | 140 | Mbps |
| Maximum Data Rate (Translation to 1.8V) | 75 | Mbps |
| Output Drive at 3.3V | ±24 | mA |
| Low Power Consumption (ICC Max) | 10 | μA |
| Package Types | DCT (SM8), DCU (VSSOP), YZP (DSBGA) | |
| Package Size (DCU) | 2mm × 3.1mm | |
| Junction-to-Ambient Thermal Resistance (DCU) | 203.6 | °C/W |
Key Features
- Fully Configurable Dual-Rail Design: Allows each port to operate over the full 1.65-V to 5.5-V power-supply range, enabling universal low-voltage bidirectional translation between various voltage nodes (1.8V, 2.5V, 3.3V, and 5V).
- High-Speed Translation: Supports high data rate applications with translated signal data rates up to 420 Mbps when translating from 3.3V to 5V.
- Ioff Supports Partial-Power-Down Mode Operation: Prevents backflow current by disabling I/O output circuits when the device is in partial-power-down mode, ensuring the inputs and outputs enter a high-impedance state.
- VCC Isolation Feature: If either VCC input is at GND, both ports are in the high-impedance state.
- DIR Input Circuit Referenced to VCCA: The direction-control (DIR) input circuit is supplied by VCCA, allowing for flexible data transmission direction.
- Low Power Consumption: Maximum ICC of 10 μA, making it suitable for low-power applications.
- ±24-mA Output Drive at 3.3 V: Balanced high-drive CMOS push-pull outputs that can sink and source similar currents.
Applications
- Voltage Level Translation: Ideal for translating signals between different voltage domains in mixed-voltage systems, such as those found in embedded systems, consumer electronics, and industrial control systems.
- High-Speed Data Transfer: Suitable for applications requiring high-speed data transfer, such as in telecommunications, data storage systems, and high-performance computing.
- Partial-Power-Down Systems: Useful in systems that require partial power-down capabilities to conserve power, such as in battery-powered devices and energy-efficient designs.
Q & A
- What is the operating voltage range of the SN74LVC2T45?
The operating voltage range for both VCCA and VCCB is from 1.65V to 5.5V.
- What is the maximum data rate supported by the SN74LVC2T45?
The maximum data rate supported is up to 420 Mbps when translating from 3.3V to 5V.
- What is the purpose of the DIR input in the SN74LVC2T45?
The DIR input controls 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.
- How does the Ioff feature work in the SN74LVC2T45?
The Ioff feature disables the outputs and prevents backflow current when the device is in partial-power-down mode, putting the inputs and outputs in a high-impedance state.
- What is the VCC isolation feature in the SN74LVC2T45?
If either VCC input is at GND, both ports enter a high-impedance state.
- What are the package options available for the SN74LVC2T45?
The device is available in DCT (SM8), DCU (VSSOP), and YZP (DSBGA) packages.
- What is the thermal resistance of the DCU package?
The junction-to-ambient thermal resistance for the DCU package is 203.6 °C/W.
- Is the SN74LVC2T45 suitable for low-power applications?
Yes, it has a maximum ICC of 10 μA, making it suitable for low-power applications.
- What is the output drive capability of the SN74LVC2T45 at 3.3V?
The device can drive ±24 mA at 3.3V.
- What are some common applications of the SN74LVC2T45?
Common applications include voltage level translation, high-speed data transfer, and partial-power-down systems.
