Datasheet

MAX31911
Industrial, Octal, Digital Input
Translator/Serializer
4Maxim Integrated
Note 2: Limits are 100% production tested at T
A
= +25°C and/or T
A
= +125°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.
Note 3: When using suggested external 2.2kω series resistors, limits of -3V to +36V apply.
Note 4: f
IN
refers to the maximum pulse frequency (1/f
IN
= shortest pulse width) that can be detected from the field sensors and
switches.
Note 5: External resistor R
REF
can be adjusted to set any desired current limit between 0.5mA and 6mA.
Note 6: See Figure 8.
Note 7: See Figure 5.
Note 8: See Figure 7.
Note 9: See Figure 6.
Note 10: This is the maximum bit transfer rate through the serializer interface.
AC ELECTRICAL CHARACTERISTICS: SPI INTERFACE
(V
CC24V
= 7V to 36V, T
J
= -40NC to +150NC, unless otherwise noted.) (Note 2)
AC ELECTRICAL CHARACTERISTICS
(V
CC24V
= 7V to 36V, T
J
= -40NC to +150NC, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CLK Pulse Duration t
CLKPW
(Note 6) 20 ns
CS Pulse Duration
t
CSPW
(Note 7) 20 ns
SIN to CLK Setup Time t
SU1
(Note 8) 5 ns
SIN to CLK Hold Time t
H1
(Note 8) 8 ns
CS to CLK Setup Time
t
SU2
(Note 9) 8 ns
CS to CLK Recovery Time
t
REC
(Note 9) 12 ns
Clock Pulse Frequency f
CLK
(Notes 6, 10) DC 25 MHz
Propagation Delay, CLK to SOUT t
P1
(Note 6) 20 ns
Propagation Delay, CS to SOUT
t
P2
(Note 7) 20 ns
Rise/Fall Time SOUT/FAULT
t
R/F
(Note 6) 40 ns
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Field Input Pulse Width t
PW
No external capacitors on pins IN1-
IN8
1 µs
ESD
HBM, all pins
±2
kV
HBM, IN1-IN8 with respect to GND ±15