Overview
The TXS0102DCUR, 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 bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5 V, making it versatile for use in a wide range of applications. The TXS0102DCUR operates with two separate configurable power-supply rails: the A ports support voltages from 1.65 V to 3.6 V, and the B ports support voltages from 2.3 V to 5.5 V. This allows for seamless translation between different logic signal levels without the need for a direction-control signal.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VSSOP-8 |
| Pins | 8 |
| Operating Temperature Range (°C) | -40 to 85 |
| VCCA Voltage Range | 1.65 V to 3.6 V |
| VCCB Voltage Range | 2.3 V to 5.5 V |
| Maximum Data Rates | 24 Mbps (push-pull), 2 Mbps (open-drain) |
| ESD Protection | A port: 2500-V Human-Body Model, 250-V Machine Model, 1500-V Charged-Device Model; B port: 8-kV Human-Body Model, 250-V Machine Model, 1500-V Charged-Device Model |
| Thermal Resistance (RθJA) | 199.1 °C/W (for VSSOP-8 package) |
Key Features
- No direction-control signal needed for bidirectional translation.
- Maximum data rates of 24 Mbps (push-pull) and 2 Mbps (open-drain).
- Available in various packages including VSSOP-8, SSOP-8, X2SON-8, and DSBGA-8.
- VCC isolation feature: if either VCC input is at GND, both ports are in the High-Impedance state.
- No power-supply sequencing required: either VCCA or VCCB can be ramped first.
- Ioff supports partial-power-down mode operation.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- Internal 10-kΩ pullup resistors on each I/O line.
Applications
The TXS0102DCUR is suitable for a variety of applications where mixed-voltage systems need to communicate. These include:
- Interface between different voltage domains in a system, such as between microcontrollers, FPGAs, and other ICs operating at different voltage levels.
- Level shifting in battery-powered devices to ensure compatibility between different voltage levels.
- Industrial control systems where multiple voltage levels are used.
- Consumer electronics requiring voltage translation between different components.
Q & A
- What is the primary function of the TXS0102DCUR?
The primary function of the TXS0102DCUR is to act as a bidirectional voltage-level translator, enabling digital switching compatibility between mixed-voltage systems.
- What are the supported voltage ranges for the A and B ports?
The A ports support voltages from 1.65 V to 3.6 V, and the B ports support voltages from 2.3 V to 5.5 V.
- What are the maximum data rates for push-pull and open-drain configurations?
The maximum data rates are 24 Mbps for push-pull and 2 Mbps for open-drain configurations.
- Does the TXS0102DCUR require a direction-control signal?
No, the TXS0102DCUR does not require a direction-control signal for bidirectional translation.
- What is the operating temperature range of the TXS0102DCUR?
The operating temperature range is -40°C to 85°C.
- What type of ESD protection does the TXS0102DCUR offer?
The device offers ESD protection exceeding 2500-V Human-Body Model, 250-V Machine Model, and 1500-V Charged-Device Model for the A port, and 8-kV Human-Body Model, 250-V Machine Model, and 1500-V Charged-Device Model for the B port.
- How does the VCC isolation feature work?
If either VCC input is at GND, both ports are placed in the High-Impedance state.
- Is power-supply sequencing required for the TXS0102DCUR?
No, either VCCA or VCCB can be ramped first without any sequencing requirement.
- What is the purpose of the internal pullup resistors on the I/O lines?
The internal 10-kΩ pullup resistors on each I/O line help in dc current sourcing capability and maintaining the logic state of the I/Os.
- How do you ensure the high-impedance state 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.
