4-Bit Bi-directional Level Shifter with Automatic Direction Controller

This 4-bit non-inverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. VCCA should not exceed VCCB. When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. The PI4ULS5V104 is designed so that the OE input circuit is supplied by VCCA. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. To ensure the high-impedance state during power up or power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver. 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port (VCCA = VCCB) VCC Isolation Feature – If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State OE Input Circuit Referenced to VCCA Low Power Consumption, 5-µA Max ICC Ioff Supports Partial-Power-Down Mode Operation Latch-Up Performance Exceeds 100mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 A Port 2500-V Human-Body Model (A114-F) 200-V Machine Model (A115-A) 1500-V Charged-Device Model (C101D) B Port 15-kV Human-Body Model (A114-F) 200-V Machine Model (A115-A) 1500-V Charged-Device Model (C101D) Package:Lead free and Green 14-pin QFN 3.5x3.5 Package Code ZB