Manual

3
Product overview
The Whadda Logic Level Shifter module provides 8 logic conversion channels to enable microcontrollers,
sensors and modules with different logic level voltages to communicate with each other. Each channel is
fully bidirectional, and is compatible with both open-drain and push-pull logic drivers. The module can
be used to convert 3.3 V to 5 V, 1.8-3.3. V and other common logic levels.
It is recommended to pull the Output Enable pin high with a pullup resistor to ensure the outputs are
properly enabled. If the different logic level data lines need to be isolated, the Output Enable line can be
pulled low. This will put all of the I/O channels in a high-impedance state.
Specifications
IC type: TI TXS0108E
Low-level voltage range: 1,4 – 3,6 V
High-level voltage range: 1,65 – 5,5 V
Dimensions (W x L x H): 22,4 x 26,7 x 12,5 mm
Wiring description
Pin
Name
Description
VA
Low voltage supply (1,4 – 3,6 V)
Voltage supply of low-level side, should always be
lower than voltage on VB pin
A1
Low voltage I/O channel 1
Input-Output channel 1 of low-level side
A2
Low voltage I/O channel 2
Input-Output channel 2 of low-level side
A3
Low voltage I/O channel 3
Input-Output channel 3 of low-level side
A4
Low voltage I/O channel 4
Input-Output channel 4 of low-level side
A5
Low voltage I/O channel 5
Input-Output channel 5 of low-level side
A6
Low voltage I/O channel 6
Input-Output channel 6 of low-level side
A7
Low voltage I/O channel 7
Input-Output channel 7 of low-level side
A8
Low voltage I/O channel 8
Input-Output channel 8 of low-level side
OE
Output Enable
Disables the device when set low, which places all I/O
channels in the high-impedance state.
VB
High voltage supply (1,65 – 5,5 V)
Voltage supply of high-level side, should always be
higher than voltage on VA pin
B1
High voltage I/O channel 1
Input-Output channel 1 of high-level side
B2
High voltage I/O channel 2
Input-Output channel 2 of high-level side
B3
High voltage I/O channel 3
Input-Output channel 3 of high-level side
B4
High voltage I/O channel 4
Input-Output channel 4 of high-level side
B5
High voltage I/O channel 5
Input-Output channel 5 of high-level side
B6
High voltage I/O channel 6
Input-Output channel 6 of high-level side
B7
High voltage I/O channel 7
Input-Output channel 7 of high-level side
B8
High voltage I/O channel 8
Input-Output channel 8 of high-level side
GND
Ground
Ground, 0 V