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L99LD01 датащи(PDF) 57 Page - STMicroelectronics

номер детали L99LD01
подробное описание детали  High efficiency constant current LED driver for automotive applications
PDF  69 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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L99LD01 датащи(HTML) 57 Page - STMicroelectronics

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L99LD01
SPI electrical characteristics
68
Figure 31. SPI maximum clock frequency
The maximum SPI clock frequency can be calculated as follows (see Figure 31):
tCLKQV(total) = tCLKrise(uC) + tCLKfilt(PCB) + tCLKQV(slave) + tsetup(uC)
fCLK(max) < ½ x tCLKQV(total)
Example:
tCLKQV = 25 ns + 100 ns + 250 ns + 25 ns = 400 ns
fCLK(max) < 1.25 MHz
Figure 32. NRES pin open drain structure



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