2 Bit Bidirectional Voltage Level Shifter, 1.65V to 5.5V, 8-Pin SM8

The Texas Instruments TXS0102DCTR is a 2-bit bidirectional voltage level shifter engineered for seamless communication between mixed-voltage systems. It is designed for both open-drain and push-pull applications, enabling reliable digital switching compatibility. Its core architecture utilises two independent configurable power rails to provide maximum flexibility.

Key Advantages & Operation

• Port A supports operational voltages from 1.65V to 3.6V, directly tracking the VCCA supply.
• Port B supports a wider voltage range from 2.3V to 5.5V, tracking the VCCB supply.
• This dual-rail design allows the device to translate signals bidirectionally between lower and higher voltage nodes efficiently.

Power Management & Control

Power consumption is kept to a minimum via a straightforward control scheme. When the Output Enable (OE) pin is set low, all input/output (I/O) ports enter a high-impedance state. This dramatically reduces the power-supply quiescent current draw. For stable operation during power-up or power-down sequences, it is recommended that the OE pin be connected to ground (GND) via a pull-down resistor, with the resistor value calculated based on the driver's current-sourcing capability.

Designed for Simplicity & Reliability

This level shifter eliminates common design complications. It requires no direction-control signal and imposes no power-supply sequencing—you can ramp either VCCA or VCCB first without issue. It also supports partial-power-down (IOFF) mode operation, enhancing energy efficiency in complex systems.

Built to rigorous standards, the device offers excellent latch-up performance, exceeding 100mA per the JESD 78, Class II specification. As a green product, it is manufactured without antimony (Sb) or bromine (Br) based flame retardants, aligning with environmental responsibility goals.

Typical Applications