Overview
The SN74LVC2T45DCTRE4, produced by Texas Instruments, is a 2-Bit Dual Supply Transceiver with configurable voltage-level shifting and 3-state outputs. This device is designed for asynchronous communication between two data buses, allowing for flexible voltage translation between different logic levels. It supports a wide range of supply voltages from 1.65V to 5.5V on both A and B ports, making it versatile for various applications in mixed-voltage systems.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA Supply Voltage | 1.65 | 5.5 | V |
| VCCB Supply Voltage | 1.65 | 5.5 | V |
| VI Input Voltage | -0.5 | 6.5 | V |
| VO Output Voltage (High-Impedance or Power-Off State) | -0.5 | 6.5 | V |
| VO Output Voltage (High or Low State) | -0.5 VCCA + 0.5 (A port) | -0.5 VCCB + 0.5 (B port) | V |
| IIK Input Clamp Current (VI < 0) | -50 | mA | |
| IOK Output Clamp Current (VO < 0) | -50 | mA | |
| IO Continuous Output Current | -50 | 50 | mA |
| TJ Junction Temperature | 150 | °C | |
| Tstg Storage Temperature | -65 | 150 | °C |
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.
- Configurable voltage-level shifting, enabling data transmission between different voltage domains.
- 3-state outputs to control data flow and prevent backflow when the device is powered down.
- Ioff circuitry to disable outputs and prevent damaging current backflow in partial-power-down applications.
- VCC isolation feature ensuring both ports are in the high-impedance state if either VCC input is at GND.
- High on DIR allows data transmission from A to B, and low on DIR allows data transmission from B to A.
Applications
- Mixed-voltage systems where data needs to be translated between different logic levels.
- Asynchronous communication between two data buses in various electronic systems.
- Partial-power-down applications where power management is critical.
- Systems requiring flexible and reliable voltage translation, such as in industrial control, automotive, and consumer electronics.
Q & A
- What is the SN74LVC2T45DCTRE4 used for?
The SN74LVC2T45DCTRE4 is used for asynchronous communication between two data buses and for configurable voltage-level shifting in mixed-voltage systems.
- What is the voltage range supported by the SN74LVC2T45DCTRE4?
The device supports a supply voltage range of 1.65V to 5.5V on both A and B ports.
- How does the direction control (DIR) input work?
The DIR input controls the direction of data transmission. A high on DIR allows data transmission from A to B, and a low on DIR allows data transmission from B to A.
- What is the purpose of the 3-state outputs?
The 3-state outputs are used to control data flow and prevent backflow when the device is powered down.
- What is the Ioff circuitry used for?
The Ioff circuitry disables the outputs to prevent damaging current backflow in partial-power-down applications.
- What is the VCC isolation feature?
The VCC isolation feature ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- What are the thermal characteristics of the SN74LVC2T45DCTRE4?
The device has specified thermal metrics such as junction-to-ambient thermal resistance (RθJA), junction-to-case thermal resistance (RθJC), and junction-to-board thermal resistance (RθJB).
- What are the input and output current specifications?
The device has specified input clamp current, output clamp current, and continuous output current limits.
- What are the storage and operating temperature ranges?
The storage temperature range is -65°C to 150°C, and the operating temperature range is specified under recommended operating conditions).
- Where can I find more detailed specifications and documentation?
More detailed specifications and documentation can be found on the Texas Instruments website, including the datasheet and product folder links).
