Bidirectional level shifter for mixed-voltage boards
The Maxim Integrated MAX14591ETA+T is a single-circuit, two-channel bidirectional voltage level translator designed to bridge logic domains from 0.9 V up to 5.5 V on the VCCA side and 1.65 V to 5.5 V on the VCCB side. It supports data rates up to 16 Mbps with open-drain or push-pull output options, making it suitable for I²C, SPI, UART, and GPIO level shifting in mixed-voltage systems. The part comes in a compact 8-TDFN (2x2 mm) package rated for -40°C to +85°C industrial temperature range.
Thermal-shutdown and tri-state protection
Built-in thermal-shutdown protection disables the outputs if the die temperature exceeds a safe threshold, preventing damage during a fault condition like a shorted bus line or excessive ambient heat. The tri-state input feature lets the designer disable the translator outputs, putting the bus into a high-impedance state — useful for multi-master arbitration or power-save modes where the level shifter must not load the lines.
Package and footprint considerations
Housed in an 8-WFDFN (exposed-pad 8-TDFN, 2x2 mm body), the MAX14591ETA+T requires a thermal-land pattern on the PCB for proper heat dissipation. The exposed pad must be soldered to a ground-plane via array to keep junction temperatures in check, especially if both channels are active near the 16 Mbps limit at elevated ambient. The small footprint suits space-constrained designs like portable instruments, sensor modules, or compact IoT nodes.
Lifecycle and sourcing posture
The MAX14591ETA+T carries an Active lifecycle status per the manufacturer, with ROHS3 compliance. For BOM planning, this means no immediate last-time-buy risk and continued support for new designs.