Rainbow-electronics MAX13362 Manual de usuario descargar pdf (Pagina 6)

MAX13362

24-Channel Automotive Switch Monitor

6 _______________________________________________________________________________________

SWITCH THRESHOLD vs. VS VOLTAGE

(LOW-SIDE SWITCH)

MAX13362 toc10

VS VOLTAGE (V)

SWITCH THRESHOLD (V)

12 1713 161410

3.1

3.2

3.3

3.4

3.5

3.0

91811 15

SWITCH OPEN TO CLOSE

SWITCH CLOSE TO OPEN

SWITCH STATUS CHANGE

(POLLING MODE)

MAX13362 toc11

2ms/div

INT

5V/div

2V/div

10V

Pin Description

Typical Operating Characteristics (continued)

= V

= 5V, V

= 14V, T

= +25°C, unless otherwise noted.)

PIN NAME FUNCTION

1, 2, 11,

29, 30

N.C. No Connection. Not internally connected.

3 IN17 Switch Monitor Input Channel 17. Connect IN17 to a ground-connected switch.

4 IN18 Switch Monitor Input Channel 18. Connect IN18 to a ground-connected switch.

5 IN19 Switch Monitor Input Channel 19. Connect IN19 to a ground-connected switch.

6 IN20 Switch Monitor Input Channel 20. Connect IN20 to a ground-connected switch.

7 IN21 Switch Monitor Input Channel 21. Connect IN21 to a ground-connected switch.

8 IN22 Switch Monitor Input Channel 22. Connect IN22 to a ground-connected switch.

9IN23

Switch Monitor Input Channel 23. Connect IN23 to a battery-connected or ground-connected switch.

When used for a battery-connected switch, add a 100Ω series protection resistor to the input.

10 INT

Inter r up t Outp ut. INT i s an op en- d r ai n outp ut that asser ts l ow w hen one or m or e of the i np uts ( IN 0–IN 23)

chang e state and ar e enab l ed for i nter r up ts, or w hen the over tem p er atur e thr eshol d i s exceed ed .

12 CLK SPI Serial Clock Input

13 SDO

SPI Serial Data Output. SPI data is output on SDO on the rising edges of CLK while CS is held low.

SDO is high impedance when CS is high. Connect SDO to a microcontroller data input or to a

succeeding device in a daisy chain.

14 CS

SPI Chip-Select Input. Drive CS low to enable clocking of data into and out of the IC. SPI data is

latched into the device on the rising edge of CS.

15 SDI

SPI Serial Data Input. SPI data is latched into the internal shift register on the falling edges of CLK

while CS is held low. SDI has an internal 50kΩ pulldown resistor. Connect SDI to the SDO of a

preceding device in a daisy chain or to the microcontroller data output.

16, 18 GND Ground. Pins 16 and 18 must be connected to ground.

17 V

Logic Supply Voltage. Connect V

to a 3.3V or 5V logic supply. Bypass V

to GND with at least a

0.1µF capacitor placed as close as possible to V

1 2 3 4 5 6 7 8 9 10 11 12 13 14

MAX13362 1

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Rainbow-electronics MAX13362 Manual de usuario Pagina 6

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