Overview
The TXS0102, produced by Texas Instruments, is a 2-bit bidirectional voltage-level translator designed to establish digital switching compatibility between mixed-voltage systems. This device supports operating voltages ranging from 1.65 V to 3.6 V on the A ports and from 2.3 V to 5.5 V on the B ports, allowing for bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5 V.
The TXS0102 features an auto-direction-sensing architecture, eliminating the need for a direction-control signal. It includes integrated 10-kΩ pullup resistors and edge-rate accelerators to enhance data rates, making it suitable for both open-drain and push-pull CMOS logic outputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range (A Port) | 1.65 to 3.6 | V |
| Operating Voltage Range (B Port) | 2.3 to 5.5 | V |
| Maximum Data Rate (Push-Pull) | 24 | Mbps |
| Maximum Data Rate (Open Drain) | 2 | Mbps |
| Output Enable (OE) Input | Low: High-impedance state | |
| Internal Pullup Resistors | 10 kΩ | |
| Operating Free-Air Temperature | -40 to 85 | °C |
| Package Options | DCT (SSOP, 8), DCU (VSSOP, 8), DQE (X2SON, 8), DQM (X2SON, 8), YZP (DSBGA, 8) |
Key Features
- No direction-control signal needed for data flow.
- Auto-direction-sensing architecture for bidirectional translation.
- Integrated 10-kΩ pullup resistors for open-drain applications.
- Edge-rate accelerators to enhance data rates.
- Support for both push-pull and open-drain logic outputs.
- Low power consumption with high-impedance state when OE is low.
- Multiple package options including DCT, DCU, DQE, DQM, and YZP.
Applications
The TXS0102 is primarily used to bridge the digital-switching compatibility gap between devices or systems operating at different voltage levels. It is particularly suitable for:
- Interfacing with open-drain drivers such as I2C or 1-wire buses.
- Point-to-point topology for interfacing devices at different interface voltages.
- Systems requiring bidirectional data translation without a control signal.
- Applications where push-pull drivers are connected to the data I/Os, although the TXB0102 might be preferred for such scenarios.
Q & A
- What is the operating voltage range for the A and B ports of the TXS0102?
The A port operates from 1.65 V to 3.6 V, and the B port operates from 2.3 V to 5.5 V.
- What are the maximum data rates for push-pull and open-drain configurations?
The maximum data rate is 24 Mbps for push-pull and 2 Mbps for open-drain configurations.
- Does the TXS0102 require a direction-control signal?
No, the TXS0102 features an auto-direction-sensing architecture and does not require a direction-control signal.
- What is the purpose of the output-enable (OE) input?
The OE input, when set low, places all I/Os in a high-impedance state, significantly reducing power consumption.
- What types of pullup resistors are integrated into the TXS0102?
The device includes internal 10-kΩ pullup resistors for both A and B ports.
- What are the recommended practices for PCB layout to ensure proper operation?
Short PCB trace lengths should be maintained to avoid excessive capacitive loading and ensure proper one-shot triggering.
- Can the TXS0102 be used with both open-drain and push-pull drivers?
- What are the package options available for the TXS0102?
The TXS0102 is available in DCT (SSOP, 8), DCU (VSSOP, 8), DQE (X2SON, 8), DQM (X2SON, 8), and YZP (DSBGA, 8) packages.
- How should the OE input be managed during power-up or power-down?
The OE input should be tied to GND through a pulldown resistor to ensure the high-impedance state during power-up or power-down.
- What is the significance of the edge-rate accelerators in the TXS0102?
The edge-rate accelerators speed up the output slew rate by monitoring input edges and increasing the current drive capability during low-to-high transitions.
