MAX31911AUI+ Maxim Integrated, MAX31911AUI+ Datasheet - Page 11

• Manufacturer Part Number: MAX31911AUI+
• Description: Serializers & Deserializers - Serdes Octal Industrial Digital Serializer
• Manufacturer: Maxim Integrated
• Type: Serializerr

Specifications of MAX31911AUI+

• Rohs: yes
• Data Rate: 1 Mbit/s
• Input Type: Industrial Digital (IEC 61131-2 Types 1, 2, 3)
• Output Type: CMOS
• Number Of Inputs: 8
• Number Of Outputs: 1
• Operating Supply Voltage: 10 V to 36 V
• Operating Temperature Range: - 40 C to + 125 C
• Package / Case: TSSOP-28
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Part # Aliases: 90-31911+000

Serial output of the device functions in one of two
modes, depending on the MODESEL setting
With MODESEL = 0, the device output includes a 5-bit
CRC, an undervoltage alarm, and an overtemperature
alarm. See the
age, and overtemperature functional descriptions. With
MODESEL = 1, the device outputs only the state of the
IN1–IN8 inputs and omits the CRC, undervoltage alarm,
and overtemperature alarm.
For systems with more than eight sensor inputs, multiple
devices can be daisy-chained to allow access to all data
inputs through a single serial port. When using a daisy-
chain configuration, connect SOUT of one of the devices
to the SIN input of another upstream device. CS and SCK
of all devices in the chain should be connected together
Figure 2. Daisy-Chain Operation
Table 3. MODESEL Settings
Maxim Integrated
MODESEL SETTING
0
1
Detailed Description
Serial-Port Operation
SIN
SOUT
16-bit output; [IN8–IN1][CRC (5 bit)][UV][OT][X]
8-bit output; [IN8–IN1]
MAX31911
Daisy-Chain Operation
for CRC, undervolt-
(Table
SIN
SOUT
Industrial, Octal, Digital Input
MAX31911
3).
in parallel (see
external components used to enhance EMC robustness
do not need to be duplicated for each device of a circuit
board.
The serial output of the device adheres to the SPI proto-
col, running with CPHA = 0 and CPOL = 0. Input states
on IN1–IN8 are latched in on the falling edge of CS. The
transfer of data out of the slave output, SOUT, starts
immediately when CS is asserted (i.e., MSB is output
onto SOUT independent of CLK). The remaining data bits
are shifted out on the falling edge of CLK. The data bits
are written to the output SOUT with MSB first. When CS
is high, SOUT is high impedance. The resultant timing is
shown in
if 8-bit operation mode is selected with the MODESEL
input.
SPI timing specifications.
FUNCTIONALITY
Figure
Figure 3
SIN
SOUT
Translator/Serializer
Figure
5,
MAX31911
Figure
Figure
illustrates a 16-input application.
4. Note that all bits after IN1 are invalid
2). In a daisy-chain configuration,
6,
Figure
TO µCONTROLLER
MAX31911
7, and
SPI Waveforms
Figure 8
illustrate
11