Rainbow Electronics MAX13362 - Manual (Page 4)

MAX13362
24-Channel Automotive Switch Monitor
4 _______________________________________________________________________________________
CS
CLK
SDI MSB IN
MSB OUT LSB OUT
t
SDO(DIS)
t
VALID
t
SO(EN)
t LEAD
SDO
t LAG
t SI(SU) t SI(HOLD)
Figure 1. SPI Timing Characteristics
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Polling Active Time Accuracy t POLL_ACT -20 +20 %
Polling Time Accuracy t POLL -20 +20 %
Time from Shutdown to Normal
Operation
t
START
0.1 1 ms
ELECTRICAL CHARACTERISTICS (continued)
(V DD = 5V, V VS = 14V, T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =+25°C.)
Note 1: When V VS is above 28V, the wetting current is disabled to limit power dissipation, and the switch inputs are not monitored.
When V VS returns, there is a 1ms blanking time before the external switches are polled.
Note 2: This current only flows during the polling active time thus the average value is much lower. For example with a polling time
of 64ms and a polling active time of 1ms the average current on an input when connected to 14V is typically 16µA x 1/64 =
0.25µA.
Note 3: Difference between VS and IN_ voltage when wetting current has dropped to 90% of its nominal value.
Note 4: Guaranteed by design.