Overview
The SN74LVC1T45DCKRE4, produced by Texas Instruments, is a single-bit dual-supply bus transceiver designed for asynchronous communication between two data buses. This device features configurable voltage-level shifting and 3-state outputs, making it versatile for various voltage translation applications. The SN74LVC1T45 operates with two separate power-supply rails, VCCA and VCCB, each of which can be supplied with any voltage between 1.65V and 5.5V. This allows for universal low-voltage bidirectional translation between 1.8V, 2.5V, 3.3V, and 5V voltage nodes.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | SOT-SC70 (DCK) | 6 pins |
| Operating Temperature Range | °C | -40 to 85 |
| VCCA and VCCB Voltage Range | V | 1.65 to 5.5 |
| Maximum Data Rate | Mbps | 420 (3.3V to 5V translation), 210 (translate to 3.3V), 140 (translate to 2.5V), 75 (translate to 1.8V) |
| Output Drive | mA | ±24 at 3.3V |
| ESD Protection | V | 2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model |
| Low Power Consumption | µA | 4 maximum ICC |
| Ioff | Supports partial-power-down mode operation | - |
| VCC Isolation Feature | If either VCC input is at GND, both ports are in the high-impedance state | - |
Key Features
- Fully configurable dual-rail design allows each port to operate over the full 1.65V to 5.5V power-supply range.
- ESD protection exceeds JESD 22: 2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model.
- Available in the Texas Instruments NanoFree™ package.
- 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, 4µA maximum ICC.
- ±24mA output drive at 3.3V.
- Ioff supports partial-power-down mode operation.
- High data rates: up to 420Mbps for 3.3V to 5V translation.
Applications
The SN74LVC1T45DCKRE4 is suitable for various level-translation applications, enabling the interfacing of devices or systems operating at different interface voltages. Typical applications include:
- Unidirectional logic level-shifting applications.
- Interfacing between different voltage domains in mixed-voltage systems.
- Personal electronic devices.
- Industrial and enterprise systems.
- Telecom applications.
Q & A
- What is the SN74LVC1T45DCKRE4 used for?
The SN74LVC1T45DCKRE4 is used for level-translation applications, allowing communication between devices or systems operating at different voltage levels.
- What is the voltage range for VCCA and VCCB?
VCCA and VCCB can be supplied with any voltage between 1.65V and 5.5V.
- What are the maximum data rates supported by the SN74LVC1T45DCKRE4?
The device supports up to 420Mbps for 3.3V to 5V translation, 210Mbps for translation to 3.3V, 140Mbps for translation to 2.5V, and 75Mbps for translation to 1.8V.
- What is the ESD protection level of the SN74LVC1T45DCKRE4?
The device has ESD protection exceeding JESD 22: 2000V Human-Body Model, 200V Machine Model, and 1000V Charged-Device Model.
- What is the VCC isolation feature of the SN74LVC1T45DCKRE4?
If either VCC input is at GND, both ports are in the high-impedance state.
- What is the output drive capability of the SN74LVC1T45DCKRE4 at 3.3V?
The device has an output drive capability of ±24mA at 3.3V.
- Does the SN74LVC1T45DCKRE4 support partial-power-down mode operation?
Yes, the device supports partial-power-down mode operation using Ioff circuitry.
- What is the package type of the SN74LVC1T45DCKRE4?
The device is available in the SOT-SC70 (DCK) package.
- What are some typical applications of the SN74LVC1T45DCKRE4?
Typical applications include unidirectional logic level-shifting, interfacing between different voltage domains, personal electronic devices, industrial and enterprise systems, and telecom applications.
- What is the operating temperature range of the SN74LVC1T45DCKRE4?
The operating temperature range is -40°C to 85°C.
