SN74AVC1T45DCKR Detailed explanation of pin function specifications and circuit principle instructions
The model number "SN74AVC1T45DCKR" belongs to Texas Instruments (TI). It is a logic level translator integrated circuit, commonly used to interface different logic voltage levels (e.g., interfacing between 3.3V and 5V systems).
Package Type:
SN74AVC1T45DCKR comes in a SOT-23-6 package, which contains 6 pins.Pin Function Descriptions (Complete Pinout):
Here is a detailed description of the 6 pins of the SN74AVC1T45DCKR logic level translator:
Pin Number Pin Name Pin Type Pin Function Description 1 A1 Input/Output (I/O) Voltage level 1 input, logic signal on the A side (low voltage side, e.g., 3.3V). 2 A2 Input/Output (I/O) Voltage level 2 input, logic signal on the A side (low voltage side, e.g., 3.3V). 3 VCC1 Power Supply (P) Supply voltage for the A side, typically 3.3V. 4 GND Ground (G) Ground pin for the device. 5 B1 Input/Output (I/O) Voltage level 1 output, logic signal on the B side (high voltage side, e.g., 5V). 6 B2 Input/Output (I/O) Voltage level 2 output, logic signal on the B side (high voltage side, e.g., 5V).Circuit Principle:
The SN74AVC1T45DCKR works as a bidirectional level shifter, meaning it allows for voltage translation between two systems working at different logic voltage levels. The device typically translates signals between a low-voltage side (e.g., 3.3V) and a high-voltage side (e.g., 5V), ensuring proper signal compatibility.
VCC1: Power supply for the low-voltage side, typically connected to 3.3V. VCC2: Power supply for the high-voltage side, typically connected to 5V. The A1/A2 pins are for the low-voltage input signals, and the B1/B2 pins are for the high-voltage output signals.The SN74AVC1T45 can operate at different voltage levels on each side of the device, allowing for flexible interfacing between devices with different logic levels, commonly used in applications like microcontrollers, sensors, and communication systems.
FAQ Section (20 Common Questions)
What is the function of the A1 and A2 pins of the SN74AVC1T45DCKR? A1 and A2 are the input pins on the low-voltage side (typically 3.3V) and are used to receive signals for level shifting. What voltage levels can be used for VCC1? VCC1 can typically be powered with a 3.3V supply for the low-voltage side. What voltage should be applied to VCC2? VCC2 should be powered with a 5V supply for the high-voltage side. Can the SN74AVC1T45DCKR be used for unidirectional level shifting? No, this IC is designed for bidirectional level shifting, meaning it supports level translation in both directions. What are the typical applications of the SN74AVC1T45DCKR? It is commonly used in applications where different voltage logic systems need to interface, such as microcontrollers, communication interfaces, and sensor systems. How is the SN74AVC1T45DCKR powered? It is powered by two voltage supplies: VCC1 for the low-voltage side (e.g., 3.3V) and VCC2 for the high-voltage side (e.g., 5V). What is the maximum input voltage for the A side? The maximum input voltage for the A side should not exceed VCC1 by more than 0.5V. What is the maximum output voltage for the B side? The maximum output voltage for the B side should not exceed VCC2 by more than 0.5V. Does the SN74AVC1T45DCKR require external pull-up resistors? No, the device has built-in pull-up resistors, so external resistors are not needed for most applications. Is the device compatible with I2C communication? Yes, it can be used to shift I2C signals between different logic levels. What is the maximum speed of operation for the SN74AVC1T45DCKR? The maximum speed is typically 100 Mbps. Can this IC be used for both input and output signals? Yes, it is a bidirectional level shifter, meaning it can handle both input and output signals on both A and B sides. What is the operating temperature range for the SN74AVC1T45DCKR? The device operates within a temperature range of -40°C to 125°C. What is the current consumption of the SN74AVC1T45DCKR? It typically consumes very low current, in the microampere range for most operations. Is the SN74AVC1T45DCKR available in other package types? Yes, it is also available in other package types, such as the 8-pin version (SN74AVC1T45). Can the device be used for SPI communication? Yes, it can be used for shifting SPI signals between different voltage levels. How does the bidirectional operation of the device work? The device automatically detects the direction of signal flow and translates the signal accordingly between the A and B sides. Is there a limit to the number of devices that can be connected to the level shifter? Yes, you should avoid exceeding the current rating for the device, typically around 12 mA per pin. What is the voltage difference between the A and B sides for proper operation? The voltage difference should not exceed 2V for reliable operation. What is the output drive capability of the device? The device can drive current up to 6 mA on the output side.Let me know if you'd like more details or explanations!
