RS0101
REV A.2
1 / 19
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
RS0101
2 / 19
www.run-ic.com
PIN CONFIGURATIONS
VCCA
GND
A
1
2
3
5
6
4
SOT23-6/SOT363(SC70-6)
VCCB
OE
B
VCCB
OE
B
2
3
5
6
4
DFN1.45X1.0-6L
VCCA
GND
A
1
PIN DESCRIPTION
PIN
NAME
TYPE
(1)
FUNCTION
SOT23-6/
SOT363(SC70-6)
DFN1.45x1.0-
6L
1
6
V
CCA
P
A Port Supply Voltage.1.65V ≤ V
CCA
≤ 5.5V and V
CCA
≤ V
CCB
.
2
5
GND
‒
Ground.
3
4
A
I/O
Input/output A. Reference to V
CCA
.
4
3
B
I/O
Input/output B. Reference to V
CCB
.
5
2
OE
I
Output Enable (Active High). Pull OE low to place all
outputs in 3-state mode. Referenced to V
CCA
.
6
1
V
CCB
P
B Ports Supply Voltage.2.3V ≤ V
CCB
≤ 5.5V.
(1) I=input, O=output, I/O=input and output, P=power