Texas Instruments ISO154XEVM - ISO154xEVM Evaluation Module ISO154XEVM ISO154XEVM Datenbogen
Produktcode
ISO154XEVM
EVM Setup and Operation
2.2
Input/Output Signal Characteristics
illustrates SDA1 and SCL1 of U1 being treated as inputs and driven by an I
2
C transmitter
connected to J3A/J4A (for SDA1) and J5A/J6A (for SCL1). The output waveforms at SDA2 and SCL2 are
captured on the oscilloscope at J3B/J4B and J5B/J6B respectively. Note the step in the rising edge of the
input waveforms at SDA1 and SCL1 indicative of the tLOOP parameter of the device and demonstrating
the effect of the difference in the low levels for the side 1 output and input enabling the device to avoid a
latch-up state.
captured on the oscilloscope at J3B/J4B and J5B/J6B respectively. Note the step in the rising edge of the
input waveforms at SDA1 and SCL1 indicative of the tLOOP parameter of the device and demonstrating
the effect of the difference in the low levels for the side 1 output and input enabling the device to avoid a
latch-up state.
Note the t
LOOP
effect on the rising edge of the input waveforms on SDA1 and SCL1.
Figure 5. Typical Waveforms, Inputs on Side 1
7
SLLU166 – June 2012
ISO154xEVM Low-Power Bidirectional I
2
C Isolators Evaluation Module
Copyright © 2012, Texas Instruments Incorporated