Velleman Whadda WPI474, Руководство пользователя

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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