Datasheet

MAX31911
Industrial, Octal, Digital Input
Translator/Serializer
7Maxim Integrated
Pin Description
Pin Configuration
PIN NAME FUNCTION
1, 2 DB0, DB1 Debounce (Filtering) Time Select Inputs
3, 5, 7, 9, 11, 18,
20, 22
IN1–IN8 Field Inputs
4, 6, 8, 10, 12,
17, 19, 21
RT1–RT8
Connect directly to GND. These pins are reserved for energy-less LED drives in future
versions of the device.
13 RIREF Current-Limiter Reference Resistor
14 V
CC24V
Field-Supply Voltage
15 5VOUT 5V Regulator Output
16
FAULT
Active-Low Overtemperature or Undervoltage Alarm
23 SOUT Serial-Data Out
24
CS
Active-Low Chip-Select Input
25 CLK Serial-Clock Input
26 MODESEL
Mode-Select Input
MODESEL = 1: Selects 8-bit shift register
MODESEL = 0: Selects 16-bit shift register
27 SIN Serial-Data Input
28 GND Field Ground
— EP Exposed Pad. Must be connected to the PCB ground plane.
TOP VIEW
MAX31911
254CLKRT1
263 MODESELIN1
272
SIN
DB1
281
+
GNDDB0
227 IN8
IN3
236
SOUTRT2
218 RT8RT3
209 IN7IN4
1910 RT7RT4
1811 IN6IN5
1712 RT6RT5
1613 FAULTRIREF
245
CS
IN2
1514 5VOUTV
CC24V
EP