TXS0108EPWR Level Shifter Specifications, Architecture, Functions, Package and Applications
31 January 2024
Ⅱ. Specifications of TXS0108EPWR
Ⅲ. Architecture of TXS0108EPWR
Ⅵ. What are the advantages and disadvantages of TXS0108EPWR?
The TXS0108EPWR is an 8-bit non-inverting converter manufactured by Texas Instruments. By introducing the specifications, architecture, functions, package and applications of TXS0108EPWR, you can better understand the characteristics and advantages of the device and provide a reference for subsequent circuit design and use.
The TXS0108EPWR is an 8-bit non-inverting converter chip with two independent configurable power rails. Port A is designed to track VCCA, which accepts a 1.2V to 3.6V supply voltage. Port B is designed to track VCCB, which accepts a 1.65V to 5.5V supply voltage. These two input supply pins allow low-voltage bidirectional conversion of 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. When the Output Enable (OE) input is LOW, all outputs are placed in a high resistance state. To ensure that the outputs are placed in a high impedance state during power-up or power-down, OE should be connected to GND via a pull-down resistor. The minimum value of this resistor depends on the pull-current capability of the driver.
Alternatives and equivalents:
• Its data rate is 60 Mb/s.
• It has 1 circuit and 8 channels.
• Its power supply voltage is 1.2 V to 5.5V.
• Its propagation delay time is 352 ns.
• TXS0108EPWR is manufactured by Texas Instruments.
• The installation method of TXS0108EPWR is SMD or SMT.
• Its high level output current and low level output current are 50 mA.
• The level converter is shipped in tape and reel packaging so that components can be installed efficiently.
• The level shifter has a minimum operating temperature of -40°C and a maximum operating temperature of 85°C.
The figure shows semi-buffered architecture design this application requires for both push-pull and open-drain mode. This application uses edge-rate accelerator circuitry (for both the high-to-low and low-to-high edges), a high -on-resistance N-channel pass-gate transistor (on the order of 30Ω to 500Ω) and pull-up resistors (to provide DC-bias and drive capabilities) to meet these requirements. This design does not need a direction-control signal to control the direction of data flow from A to B or from B to A. The ensuing implementation accommodates both low-speed open-drain operation and high-speed push-pull operation.
When transmitting data from A-ports to B-ports, during a rising edge the one-shot circuit (OS3) turns on the PMOS transistor (P2) for a short-duration which reduces the low-to-high transition time. Similarly, during a falling edge, when transmitting data from A to B, the one-shot circuit (OS4) turns on the N-channel MOSFET transistor (N2) for a short-duration which speeds up the high-to-low transition. The B -port edge-rate accelerator consists of one-shot circuits OS3 and OS4. Transistors P2 and N2 and serves to rapidly force the B port high or low when a corresponding transition is detected on the A port.
When transmitting data from B- to A-ports, during a rising edge the one-shot circuit (OS1) turns on the PMOS transistor (P1) for a short-duration which reduces the low-to-high transition time. Similarly, during a falling edge, when transmitting data from B to A, the one-shot circuit (OS2) turns on NMOS transistor (N1) for a short-duration and this speeds up the high-to-low transition. The A-port edge- rate accelerator consists of one-shots OS1 and OS2, transistors P1 and N1 components and form the edge-rate accelerator and serves to rapidly force the A port high or low when a corresponding transition is detected on the B port.
TXS0108EPWR can be used in a variety of circuit systems such as automotive electronics, instrumentation, communication equipment, smart home, industrial automation systems and various electronic devices. In these fields, this level shifter enables level shifting, enabling reliable communication and collaboration between different devices.
In addition, the TXS0108EPWR features low power consumption and high speed, and is capable of supporting logic level conversion from 1.65V to 5.5V with a low-power mode and high-speed transmission capability. It also features over-voltage and over-temperature protection circuits to protect the safe and stable operation of the circuit system.
The TXS0108EPWR has a length of 6.5 mm, a width of 4.4 mm, and a height of 1.15 mm. Encased in a TSSOP-20 housing, this package provides excellent integration and compact dimensions, saving valuable board space while also offering ease of soldering and integration. In addition, the TXS0108EPWR is packaged in a tape and reel packaging, which facilitates automated production and allows for fast and accurate distribution and assembly, improving production efficiency.
1. Advantages of TXS0108EPWR
• High-speed conversion: TXS0108EPWR has a fast conversion speed to meet the needs of high-speed data transmission.
• Bidirectional voltage conversion: The converter can realize arbitrary low-voltage bidirectional conversion between different voltage nodes, which improves the flexibility and efficiency of power management.
• Independent power rails: The converter uses two independent and configurable power rails that can independently control the power supply voltages of port A and port B, thus improving the flexibility of power management.
2. Disadvantages of the TXS0108EPWR
• Higher cost: Compared to some unidirectional converters, the TXS0108EPWR has a complex internal circuit design and may have a higher cost.
• Higher power consumption: Since the TXS0108EPWR has high speed conversion and multiple power rails, it may have higher power consumption.
• Precise voltage control required: In order to obtain the best performance, we must precisely control the voltages at the VCCA and VCCB pins. Otherwise, voltage instability may negatively affect converter performance.
• Serial communication: We can use TXS0108EPWR for serial communication with protocols such as I2C, SPI or UART. These protocols are widely used in various embedded systems and they rely on stable communication between two devices. In order to ensure stable communication between devices in different voltage domains, we can choose to use TXS0108EPWR for serial communication.
• Level shifting: The TXS0108EPWR can be used to connect devices with different voltage logic levels. For example, if you have a microcontroller using 3.3V logic and a sensor using 5V logic, you can use the TXS0108EPWR to ensure proper communication between them.
• Expanded IO ports: By using the TXS0108EPWR, the microcontroller's IO ports can be expanded to different voltage domains, allowing it to communicate with a wide range of devices of different voltages. This greatly increases the flexibility of the system and allows the microcontroller to interact with more types of devices and realize richer functionality.
• Level shifting and isolation: The TXS0108EPWR has the capability to offer electrical isolation, preventing the transmission of noise or current between distinct voltage domains. In addition, the TXS0108EPWR's electrical isolation function can also provide a certain degree of security. In some special applications, such as medical equipment or high-precision measuring instruments, electrical isolation can prevent the risk of accidental electric shock or equipment damage, and improve the safety and reliability of the equipment.
• Bidirectional conversion: The TXS0108EPWR supports bi-directional data transmission, which makes it very suitable for bi-directional communication systems. This means that it can realize mutual data transmission between the A-end and the B-end. It can be used in a variety of scenarios that require bi-directional data transmission, such as smart homes, remote control systems, and sensor networks. In these scenarios, devices need to be able to send and receive data in real time to realize functions such as remote control, data monitoring and interaction of devices.
Frequently Asked Questions
1. What is the purpose of the TXS0108EPWR?
The TXS0108EPWR is a voltage-level translator designed to facilitate communication between devices operating at different voltage levels in an electronic system.
2. What is the replacement and equivalent of TXS0108EPWR?
You can replace the TXS0108EPWR with TXS0108EPWR, TXS0108EZXYR, TXS0108EPWRG4 or TXS0108ENMER.
3. Does the TXS0108EPWR support bidirectional translation?
Yes, the TXS0108EPWR supports bidirectional voltage translation, making it suitable for applications where data needs to flow in both directions.
4. What does a level shifter do?
Modern systems use level shifters to bridge domains between processors, logic, sensors, and other circuits. In recent years, the three most common logic levels have been 1.8V, 3.3V, and 5V, though levels above and below these voltages are also used.
