SDLS972B April 2023 – April 2024 LSF0102
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
To enable the I/O pins, the EN input should be tied directly to Vref_B during operation and both pins must be pulled up to the HIGH side (VCCB) through a bias resistor (typically 200kΩ). To be in the high impedance state during power-up, power-down, or during operation, the EN pin must be LOW. The EN pin should always be tied directly to the Vref_B pin and is recommended to be disabled by an open-drain driver without a pullup resistor. This allows Vref_B to regulate the EN input and bias the channels for proper translation. A filter capacitor on Vref_B is recommended for a stable supply at the device.
The supply voltage of open drain I/O devices can be completely different from the supplies used for the LSF and has no impact on the operation. For additional details on how to use the enable pin, see the Using the Enable Pin with the LSF Family video.
INPUT EN(1) PIN | Data Port State |
---|---|
Tied directly to Vref_B | An = Bn |
L | Hi-Z |