SLLU166A June 2012 – September 2022 ISO1540 , ISO1540-Q1 , ISO1541 , ISO1541-Q1
The pinouts of ISO1540 and ISO1541 are displayed in Figure 1-1. These devices have an input noise-filter that prevents transient pulses of up to 5 ns from being passed to the output of the device.
The EVM is shown in Figure 1-2, it comes with an ISO1540 and an ISO1541 installed in place of U1 and U2 respectively. However, this EVM can be configured for use with two ISO1540s or two ISO1541s.
An input or output pin can be tied either to supply voltage (VCCx) or Ground (GNDx) using the 4-pin jumpers on the EVM (J3A to J10A on side 1 and J3B to J10B on side 2). These jumpers also provide scope-probe access to each pin.
Each signal line (SDAx, SCLx) is configured with a 1-kΩ pull-up resistor (R1 to R8) to the corresponding power supply (VCCx). Reconfigure the value of this pull-up resistor as per the application requirement.