The part number "SN74LVC1T45DCKR" belongs to Texas Instruments (TI), a well-known semiconductor manufacturer. This particular part is a logic level translator, typically used for bidirectional voltage-level translation between different logic levels, such as between 3.3V and 5V systems.
Package and Pinout
The SN74LVC1T45DCKR comes in a SOT-23-5 package, which is a small, surface-mount package with five pins. Below is a detailed pin function specification and circuit principle.
Pin Function Specifications
Pin Number Pin Name Pin Type Description 1 A1 Input Logic input for the lower voltage side (referenced to VCCA). Can accept logic levels from 0 to VCCA (typically 0 to 3.3V). 2 B1 Output Logic output for the higher voltage side (referenced to VCCB). The logic level is translated from the input signal (A1). 3 GND Ground Ground pin for the device. This pin is common for both sides of the logic translator. 4 VCCA Power Supply Power supply pin for the low-voltage logic side. Typically connected to 3.3V or another appropriate voltage level for the lower side of translation. 5 VCCB Power Supply Power supply pin for the high-voltage logic side. Typically connected to 5V or another appropriate voltage level for the higher side of translation.Circuit Principle
The SN74LVC1T45DCKR is a bidirectional level translator, meaning it can handle signals in both directions. The principle of operation involves translating voltage levels between two different logic families:
VCCA (Pin 4) is connected to the low voltage logic supply (typically 3.3V). VCCB (Pin 5) is connected to the high voltage logic supply (typically 5V). The device allows bidirectional voltage translation between the A (input) and B (output) pins while maintaining correct logic level signaling on each side.20 Common FAQ about SN74LVC1T45DCKR
What is the function of the SN74LVC1T45DCKR? The SN74LVC1T45DCKR is a bidirectional logic level translator that allows signals to be translated between two different logic voltage levels. What is the maximum voltage that can be applied to VCCA and VCCB? VCCA can be between 1.65V and 3.6V, and VCCB can be between 1.65V and 5.5V. Can this IC support 5V to 3.3V voltage translation? Yes, it can be used to translate signals from 5V logic to 3.3V logic, as well as from 3.3V to 5V. What type of signals can the SN74LVC1T45DCKR translate? It translates both logic high and logic low signals (digital signals) bidirectionally. How many pins does the SN74LVC1T45DCKR have? The SN74LVC1T45DCKR comes in a 5-pin SOT-23 package. Is this IC capable of level shifting for I2C or SPI protocols? Yes, the device can be used for bidirectional level shifting in I2C or SPI communication lines. What is the package type for this IC? The SN74LVC1T45DCKR is available in the SOT-23-5 package. What is the maximum frequency for the SN74LVC1T45DCKR? The device can support high-speed signals, typically up to 100 MHz depending on the conditions. Can the SN74LVC1T45DCKR be used in low-power applications? Yes, this IC is designed for low-power operation, making it suitable for battery-powered devices.What is the operating temperature range of the SN74LVC1T45DCKR?
The device operates within a temperature range of -40°C to 125°C.How does the bidirectional feature work in this IC?
The device automatically detects the direction of the signal flow and translates accordingly, making it ideal for bidirectional signal lines.Can the SN74LVC1T45DCKR be used for unidirectional voltage translation?
Yes, although it is designed for bidirectional translation, it can still be used for unidirectional signals.What are the advantages of using the SN74LVC1T45DCKR in a design?
The advantages include low power consumption, ease of use, and compatibility with a wide range of voltage levels, especially in interfacing 3.3V and 5V logic systems.Is this IC suitable for automotive applications?
Yes, it is suitable for automotive applications given its wide operating temperature range and reliability.What is the typical application for the SN74LVC1T45DCKR?
Typical applications include logic level shifting in communication protocols, interfacing microcontrollers or sensors with different voltage levels, and level translation for I2C or SPI buses.What is the maximum current drive capability for the SN74LVC1T45DCKR?
The device can drive current up to 8 mA per pin under typical conditions.What is the difference between VCCA and VCCB?
VCCA is the low voltage supply pin, and VCCB is the high voltage supply pin, allowing for translation between different voltage levels.Can the SN74LVC1T45DCKR operate at both 3.3V and 5V simultaneously?
Yes, it can operate with different logic levels on each side, so VCCA can be 3.3V and VCCB can be 5V, enabling translation between the two.What type of logic family is the SN74LVC1T45DCKR compatible with?
It is compatible with both LVC (Low-Voltage CMOS) logic family and other CMOS logic families with appropriate voltage levels.Can the SN74LVC1T45DCKR be used in a mixed-voltage system?
Yes, the device is ideal for use in mixed-voltage systems where different logic levels need to be interface d or communicated.This response outlines the details of the SN74LVC1T45DCKR, covering the pinout, function specifications, and a list of frequently asked questions about the device.