The part number TXS0108EQPWRQ1 is part of the Texas Instruments (TI) product line, specifically within their TXS0108E family of components. This specific component is an 8-channel, bidirectional voltage-level translator, typically used for logic level shifting between different voltage domains.
1. Package Type & Pin Count
The TXS0108EQPWRQ1 is available in several package types, including TSSOP-20 (Thin Shrink Small Outline Package with 20 pins). Below is a detailed explanation of the 20-pin configuration and their corresponding functions.
2. Pin Function Specifications and Circuit Principles
Here is the detailed list of pin functions for the TXS0108EQPWRQ1 package in a TSSOP-20 format:
Pin Number Pin Name Function Description 1 A1 A-side (input) logic signal for channel 1. Used for voltage level translation from the lower to the higher voltage domain. 2 B1 B-side (output) logic signal for channel 1. Used for voltage level translation from the higher to the lower voltage domain. 3 A2 A-side (input) logic signal for channel 2. 4 B2 B-side (output) logic signal for channel 2. 5 A3 A-side (input) logic signal for channel 3. 6 B3 B-side (output) logic signal for channel 3. 7 A4 A-side (input) logic signal for channel 4. 8 B4 B-side (output) logic signal for channel 4. 9 A5 A-side (input) logic signal for channel 5. 10 B5 B-side (output) logic signal for channel 5. 11 A6 A-side (input) logic signal for channel 6. 12 B6 B-side (output) logic signal for channel 6. 13 A7 A-side (input) logic signal for channel 7. 14 B7 B-side (output) logic signal for channel 7. 15 A8 A-side (input) logic signal for channel 8. 16 B8 B-side (output) logic signal for channel 8. 17 VCCA Positive supply voltage (logic domain A). 18 VCCB Positive supply voltage (logic domain B). 19 GND Ground connection. 20 OE Output Enable (active-low). Controls the output driver enabling/disabling for all channels.3. Circuit Principle
The TXS0108EQPWRQ1 is designed to shift logic levels between two voltage domains (typically between 1.2V and 5.5V). It allows bidirectional translation, meaning signals can move in both directions with respect to the A-side and B-side of each channel. The chip utilizes internal MOSFETs to perform the voltage translation, providing logic isolation while ensuring reliable signal integrity. The OE pin can be used to disable the output drivers when necessary.
The VCCA and VCCB pins must be connected to appropriate power supplies based on the voltage levels you need to interface . VCCA is the supply for the A-side, and VCCB is the supply for the B-side.
4. 20 Common FAQ Regarding TXS0108EQPWRQ1
Q1: What is the function of the A1 pin on the TXS0108EQPWRQ1?
A1 is the input signal for channel 1 in the A-side logic domain, which will be shifted to the B-side logic domain (output).Q2: How does the TXS0108EQPWRQ1 perform voltage level translation?
The TXS0108EQPWRQ1 uses internal MOSFETs to shift voltage levels between the A-side and B-side while maintaining signal integrity for bi-directional communication.Q3: What voltage levels can be used on VCCA and VCCB?
VCCA can range from 1.65V to 5.5V, and VCCB can range from 1.65V to 5.5V as well. These pins must be powered according to the logic levels required.Q4: What is the purpose of the OE pin?
The OE pin is the Output Enable pin. It is active-low, meaning the outputs will be enabled when OE is low and disabled when OE is high.Q5: What happens when OE is high?
When OE is high, all the output drivers are disabled, and no signals will be output from the B-side channels.Q6: Can the TXS0108EQPWRQ1 handle bidirectional signal translation?
Yes, the TXS0108EQPWRQ1 supports bidirectional signal translation, meaning that both the A-side and B-side can transmit and receive signals.Q7: Can this component work with I2C communication?
Yes, the TXS0108EQPWRQ1 is commonly used in I2C communication systems for level shifting between different voltage domains.Q8: How many channels does the TXS0108EQPWRQ1 support?
The TXS0108EQPWRQ1 has 8 channels for logic level translation.Q9: What package type does the TXS0108EQPWRQ1 come in?
The TXS0108EQPWRQ1 comes in a TSSOP-20 package.Q10: What is the maximum operating frequency of the TXS0108EQPWRQ1?
The maximum operating frequency is 50 MHz for reliable operation.Q11: Is the TXS0108EQPWRQ1 hot-swappable?
Yes, the TXS0108EQPWRQ1 can be used in hot-swappable designs, provided that power sequencing is correctly implemented.Q12: Can the TXS0108EQPWRQ1 be used for both logic high and low level shifting?
Yes, the TXS0108EQPWRQ1 supports both high and low logic level shifting between the A-side and B-side.Q13: What is the recommended operating temperature range?
The TXS0108EQPWRQ1 operates in a temperature range of -40°C to +125°C.Q14: Does the TXS0108EQPWRQ1 require external pull-up or pull-down resistors?
No, the TXS0108EQPWRQ1 has internal pull-up and pull-down resistors that ensure proper operation without needing external components.Q15: What is the maximum current per pin that the TXS0108EQPWRQ1 can handle?
The TXS0108EQPWRQ1 can handle a maximum current of ±8mA per pin.Q16: Is the TXS0108EQPWRQ1 available in automotive-grade versions?
Yes, the TXS0108EQPWRQ1 is available in the Q1 series, which is rated for automotive applications.Q17: Can the TXS0108EQPWRQ1 be used for USB signal level shifting?
Yes, the TXS0108EQPWRQ1 is often used for USB signal level shifting in systems where different voltage levels are involved.Q18: How does the TXS0108EQPWRQ1 handle logic high and low signal polarity?
The TXS0108EQPWRQ1 automatically adjusts the signal polarity based on the input voltage, ensuring correct logic level interpretation.Q19: Can the TXS0108EQPWRQ1 be used for high-speed communication protocols?
Yes, the TXS0108EQPWRQ1 supports up to 50 MHz, making it suitable for high-speed protocols like I2C, SPI, and UART.Q20: Is the TXS0108EQPWRQ1 suitable for interfacing with 3.3V and 5V logic systems?
Yes, the TXS0108EQPWRQ1 is specifically designed for level translation between 3.3V and 5V logic systems.I hope this detailed explanation and FAQ list helps! Let me know if you need more specific information.
