Overview
The SN74LVC2T45DCTR is a dual-bit, dual-supply noninverting 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 SN74LVC2T45 features a fully configurable dual-rail design, allowing each port to operate over the full 1.65-V to 5.5-V power-supply range. This flexibility makes it suitable for a wide range of applications requiring voltage level translation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 85 | °C |
| Power Supply Range (VCCA and VCCB) | 1.65 to 5.5 | V |
| Maximum ICC (Power Consumption) | 4 µA | - |
| Output Drive at 3.3 V | ±24 mA | - |
| 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 |
| Package Type | SSOP (DCT), VSSOP (DCU), DSBGA (YZP) | - |
| Pins | 8 | - |
| ESD Protection | 4000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model | - |
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 Texas Instruments NanoFree™ package.
- ±24-mA output drive at 3.3 V.
- Ioff supports Partial-Power-Down mode operation.
- High data rate capabilities: up to 420 Mbps for 3.3-V to 5-V translation.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 standards.
Applications
The SN74LVC2T45DCTR is suitable for various applications requiring voltage level translation, including:
- Asynchronous communication between two data buses.
- Universal low-voltage bidirectional translation between different voltage nodes (1.8V, 2.5V, 3.3V, and 5V).
- High-speed data rate applications.
- Partial-power-down applications where Ioff is necessary to prevent backflow current.
- Systems requiring low power consumption and high ESD protection.
Q & A
- What is the operating temperature range of the SN74LVC2T45DCTR?
The operating temperature range is -40°C to 85°C.
- What is the power supply range for VCCA and VCCB?
The power supply range for both VCCA and VCCB is 1.65 V to 5.5 V.
- What is the maximum power consumption (ICC) of the SN74LVC2T45DCTR?
The maximum ICC is 4 µA.
- What are the output drive capabilities of the SN74LVC2T45DCTR at 3.3 V?
The device can drive ±24 mA at 3.3 V.
- What are the maximum data rates supported by the SN74LVC2T45DCTR?
The device supports up to 420 Mbps for 3.3-V to 5-V translation, 210 Mbps for translation to 3.3 V, 140 Mbps for translation to 2.5 V, and 75 Mbps for translation to 1.8 V.
- What types of packages are available for the SN74LVC2T45DCTR?
The device is available in SSOP (DCT), VSSOP (DCU), and DSBGA (YZP) packages.
- What is the ESD protection level of the SN74LVC2T45DCTR?
The device has ESD protection exceeding 4000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- How does the VCC isolation feature work?
If either VCC input is at GND, both ports of the device are in the high-impedance state.
- What is the purpose of the Ioff feature in the SN74LVC2T45DCTR?
The Ioff feature supports Partial-Power-Down mode operation by disabling the outputs and preventing backflow current when the device is powered down.
- What are some common applications for the SN74LVC2T45DCTR?
