Overview
The SN74LVC2T45DCUR is a dual-bit 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 (1.8V, 2.5V, 3.3V, and 5V). The transceiver features two separate configurable power-supply rails, with the A port tracking VCCA and the B port tracking VCCB, each accepting supply voltages from 1.65V to 5.5V. The device is particularly useful in systems where voltage translation is necessary, ensuring seamless data transmission between different voltage domains.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DCU) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Power Supply Range (VCCA and VCCB) | 1.65 to 5.5 | V |
| Maximum Data Rates | 420 Mbps (3.3-V to 5-V), 210 Mbps (to 3.3 V), 140 Mbps (to 2.5 V), 75 Mbps (to 1.8 V) | Mbps |
| Output Drive at 3.3 V | ±24 mA | mA |
| Low Power Consumption (ICC) | 4 µA (max) | µA |
| ESD Protection | 4000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model | V |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II | mA |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.65-V to 5.5-V power-supply range.
- VCC isolation feature – if either VCC input is at GND, both ports are in the high-impedance state.
- DIR input circuit referenced to VCCA.
- Low power consumption, with a maximum ICC of 4 µA.
- Available in the Texas Instruments NanoFree™ package.
- ±24-mA output drive at 3.3 V.
- Ioff supports Partial-Power-Down mode operation.
- High data rates: 420 Mbps (3.3-V to 5-V translation), 210 Mbps (translate to 3.3 V), 140 Mbps (translate to 2.5 V), and 75 Mbps (translate to 1.8 V).
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 standards: 4000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
Applications
The SN74LVC2T45DCUR is suitable for a variety of applications where voltage translation between different voltage domains is necessary. These include:
- Mobile and consumer electronics requiring voltage translation between different components.
- Industrial control systems where data needs to be transmitted across different voltage levels.
- Automotive systems that require reliable and efficient voltage translation.
- Embedded systems and IoT devices that need to communicate across various voltage nodes.
Q & A
- What is the primary function of the SN74LVC2T45DCUR?
The SN74LVC2T45DCUR is a dual-bit dual-supply bus transceiver designed for asynchronous communication between two data buses, allowing for universal low-voltage bidirectional translation between various voltage nodes.
- What is the power supply range for the SN74LVC2T45DCUR?
The device operates with power supply voltages ranging from 1.65V to 5.5V for both VCCA and VCCB.
- What are the maximum data rates supported by the SN74LVC2T45DCUR?
The device supports maximum data rates of 420 Mbps (3.3-V to 5-V translation), 210 Mbps (translate to 3.3 V), 140 Mbps (translate to 2.5 V), and 75 Mbps (translate to 1.8 V).
- What is the VCC isolation feature of the SN74LVC2T45DCUR?
If either VCC input is at GND, both ports of the device are in the high-impedance state.
- How does the DIR input circuit work?
The DIR input circuit is referenced to VCCA and controls the direction of data transmission between the A and B ports.
- What is the output drive capability of the SN74LVC2T45DCUR at 3.3 V?
The device has an output drive capability of ±24 mA at 3.3 V.
- Does the SN74LVC2T45DCUR support partial-power-down mode?
Yes, the device supports partial-power-down mode operation using Ioff circuitry, which disables the outputs to prevent damaging current backflow.
- What are the ESD protection levels of the SN74LVC2T45DCUR?
The device exceeds JESD 22 standards with 4000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model ESD protection.
- What is the operating temperature range of the SN74LVC2T45DCUR?
The device operates over a temperature range of -40°C to 85°C.
- In what package is the SN74LVC2T45DCUR available?
The device is available in the VSSOP (DCU) package with 8 pins.
