RS0101

REV A.3

1 / 20

www.run-ic.com

1-Bit Bidirectional Voltage-Level Translator for

Open-Drain and Push-Pull Application

FEATURES

• No Direction-Control

• Data Rates

24Mbps (Push-Pull)

2Mbps (Open-Drain)

• 1.65V to 5.5V on A ports and 2.3V to 5.5V

on B Ports (V

CCA

≤V

CCB

)

• V

CC

Isolation: If Either V

CC

is at GND, Both

Ports are in the High-Impedance State

• No Power-Supply Sequencing Required:

Either V

CCA

or V

CCB

can be Ramped First

• I

OFF

: Supports Partial-Power-Down Mode

Operation

• Extended Temperature: -40°C to +85°C

APPLICATIONS

• I

2

C/ SMBus

• UART

• GPIO

DESCRIPTION

This 1-bit non-inverting translator is a bidirectional voltage-

level translator and can be used to establish digital

switching compatibility between mixed-voltage systems. It

uses two separate configurable power-supply rails, with the

A ports supporting operating voltages from 1.65V to 5.5V

while it tracks the V

CCA

supply, and the B ports supporting

operating voltages from 2.3V to 5.5V while it tracks the V

CCB

supply. This allows the support of both lower and higher

logic signal levels while providing bidirectional translation

capabilities between any of the 1.8V, 2.5V, 3.3V and 5V

voltage nodes.

When the output-enable (OE) input is low, all I/Os are

placed in the high-impedance state, which significantly

reduces the power-supply quiescent current consumption.

OE has an internal pull-down current source, as long as

V

CCA

is powered.

To ensure the high-impedance state during power up or

power down, OE should be tied to GND through a pull-

down resistor; the minimum value of the resistor is

determined by the current-sourcing capability of the driver.

The RS0101 is available in Green SOT23-6 、

SOT363(SC70-6) and DFN1.45x1.0-6L packages. It

operates over an ambient temperature range of -40°C to

+85°C.

Functional Block Diagram

Gate Bias

One Shot

Accelerator

10KΩ

One Shot

Accelerator

V

CC A

V

CC B

OE

A

B

10KΩ