An In-Depth Look at the TXS0108ERGYR: A Solution for Logic Level Conversion
28 February 2024
Ⅱ. Specifications of TXS0108ERGYR
Ⅲ. Recommended operating conditions of TXS0108ERGYR
Ⅴ. Functional block diagram of TXSO108ERGYR
Ⅵ. Application areas of TXS0108ERGYR
Ⅶ. Wiring and circuit design of TXS0108ERGYR
TXSO108ERGYR is a high-performance 8-bit bi-directional level converter chip produced by Texas Instruments, which can convert signals from one level domain into signals from another level domain to realize bi-directional data transmission. It is characterized by low power consumption, high speed transmission and wide voltage range, which makes it suitable for level conversion and interface expansion needs in a variety of digital systems. In this article, we will discuss the details of TXS0108ERGYR.
The TXS0108ERGYR is an 8-bit bi-directional voltage level converter for open drain and push-pull applications. This in-phase converter utilizes two independent configurable supply rails. Port A is engineered to monitor VCCA and can accommodate any supply voltage ranging from 1.65 to 3.6 V. Ensuring that VCCA remains equal to or lower than VCCB is crucial. Port B is tailored to monitor VCCB and can operate with supply voltages ranging from 1.65 to 5.5 V. This design allows for universal low-voltage bidirectional conversion between 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. When the output enable (OE) input is low, all outputs go into a high impedance state. The design of the TXS0104E ensures that the OE input circuitry is powered by VCCA. To ensure that the high impedance state is maintained during power-up or power-down, the OE should be connected to GND via a pull-down resistor.
Replacements and equivalents:
• The power supply voltage of TXS0108ERGYR is 1.2 V to 5.5V.
• The propagation delay time of the TXS0108ERGYR is 312 ns.
• Its high level output current is 50 mA.
• Its data rate is 60 Mb/s.
• Its installation method is SMD or SMT.
• The manufacturer of TXS0108ERGYR is Texas Instruments.
• TXS0108ERGYR has 20 pins and is available in VQFN-20 package and tape & reel (TR) packaging.
• The level shifter has a minimum operating temperature of -40°C and a maximum operating temperature of 85°C.
Over operating free-air temperature range (unless otherwise noted)
1. Vcci is the Vcc associated with the data input port.
2. Vcco is the Vcc associated with the output port.
3. Vcca must be less than or equal to Vccb, and Vcca must not exceed 3.6V.
• High-speed data transmission: The high-speed performance of TXS0108ERGYR not only improves the compatibility between devices, but also greatly enhances the interoperability between devices. No matter which device or system it is connected to, it can quickly adapt and provide stable data transmission service.
• Wide applicability: Due to its flexible power management and high-speed data transmission characteristics, TXS0108ERGYR can be widely used in various equipment that require conversion between different voltage levels, such as communication equipment, industrial automation, and consumer electronics.
• Flexible power management: The TXS0108ERGYR uses two independent and configurable power rails. This means that whether an application requires high or low voltage, the TXS0108ERGYR can easily handle it without the need to replace or modify hardware. This flexibility greatly reduces user constraints during use and makes power management easier. The TXS0108ERGYR is designed to dynamically distribute and manage power to both power rails based on actual load conditions, resulting in higher energy utilization efficiency.
• Low-power design: In order to satisfy a variety of occasions that require high-speed data transmission and low-power consumption, the TXS0108ERGYR adopts a low-power design that effectively reduces the energy consumption of the device. First, by utilizing advanced process technology and efficient circuit design, the TXS0108ERGYR reduces unnecessary power consumption while maintaining high performance. In addition, it employs an intelligent power management strategy that dynamically adjusts power consumption according to the actual workload, resulting in a more energy-efficient mode of operation.
The TXS0108ERGYR is a non-directional voltage level converter designed to convert logic voltage levels. Port A accepts an I/O voltage range of 1.2V to 3.6V, while port B supports an I/O voltage range of 1.65V to 5.5V. This device utilizes a through-gate architecture equipped with an edge-rate gas pedal (disposable) designed to boost the overall data transfer rate. To facilitate open-drain applications, pull-up resistors have been integrated, eliminating the need for additional external resistors. Although the device is primarily designed for open-drain applications, it is also capable of converting push-pull CMOS logic outputs. The functional block diagram is shown below:
TXS0108ERGYR is mainly used for data transfer between devices with different levels, such as TVs, smartphones, tablets, laptops, digital cameras, etc. It can transfer data between devices with different levels. It can connect devices with different levels together to realize bi-directional data transmission and improve compatibility and interoperability between devices. Meanwhile, due to its high-speed transmission and low-power design, it can also be applied to occasions that require high-speed data transmission and low-power consumption, such as smart wearable devices, smart homes, etc.
• Insulation and ESD protection: In our design, we need to consider insulation and ESD protection measures to increase system stability and reliability.
• Ground connection: In order to ensure that the TXS0108ERGYR works properly and avoid potential electrical problems, we must pay special attention to connecting its ground pin (GND) correctly and securely to the system's common ground. This is because all electronic devices require a reference point to define their voltage and electrical signals, and the ground pin is a critical part of providing this baseline.
• Power connection: We connect the VCCA pin to a logic level power supply, usually 3.3V. Additionally, we connect the VCCB pin to another logic level power supply, usually 5V. In this way, VCCA and VCCB each provide two independent and configurable power rails required by the TXS0108ERGYR converter.
• Signal line connection: We connect the input signal of logic level to the A port and the output signal to the B port. Port A is connected to the VCCA power supply, and port B is connected to the VCCB power supply.
• Automatic direction control: TXS0108ERGYR has automatic direction control function without external control signal. Based on the direction of the input signal, it automatically selects the correct channel for conversion.
• Circuit layout: During the PCB layout process, we strive to shorten the length of signal lines to reduce the possibility of signal crosstalk. At the same time, in order to ensure the best signal quality and reduce transmission delay, we try to place the TXS0108ERGYR as close as possible to the device it is connected to.
Frequently Asked Questions
1. Can the TXS0108ERGYR handle level-shifting for I2C communication?
Yes, the TXS0108ERGYR can be used for level shifting in I2C communication between devices operating at different voltage levels.
2. What is the operating temperature range of TXS0108ERGYR?
The operating temperature of TXS0108ERGYR ranges from -40°C to 85°C.
3. What is the replacement and equivalent of TXS0108ERGYR?
You can replace the TXS0108ERGYR with TXS0108EPWR, TXS0108EZXYR or TXS0108EPWRG4.
4. What is the purpose of the TXS0108ERGYR?
The TXS0108ERGYR is designed to translate between different voltage levels in digital systems, enabling communication between devices with different logic voltage levels.
