Product Highlights
• Software Configurable
• Eight Inputs Individually Configurable as Sink or
Source
• Type 1/3, Type 2, TTL and Hi-Z (HTL) Modes
• Wide Resistor-Settable Accurate Input Current
Ranging from 0.5mA to 6.75mA
• Programmable Glitch Filters
• Extensive Diagnostics (Supply Voltage
Monitoring, Temperature Alarms, PCB Fault
Alarms, Thermal Shutdown)
• Optional 16-bit Down-Counter Mode per Input
• Addressable or Daisy-Chain SPI to Reduce
Isolation Channels
• Robust Solution
• IEC 61000-4-2 ESD Airgap ±15kV and Contact
±8kV with Minimum 680Ω Pulse Resistor at Field
Inputs
• IEC 61000-4-5 Surge ±1.2kV/42Ω with Minimum
680Ω Pulse Resistor at Field Inputs
• Cyclic Redundancy Check (CRC) Error Detection
on SPI
• -40°C to +125°C Operating Temperature
• Low-Power Dissipation
• Operates from 8V to 36V Field Supply
• Low-Supply Current 2mA Maximum
• Compact Solution
• Integrated 5V, 20mA Linear Regulator
• 2.5V to 5.5V Logic Interface
• LED Driver Matrix or GPO Outputs
• 5mm x 5mm 32-Pin TQFN Package

Key Applications
• Programmable Logic Controllers
• Factory Automation
• Process Control
The MAX22196 is an industrial octal digital input that
translates eight industrial 24V or TTL level inputs to logic
level outputs. The device has a serial interface allowing
configuration and reading of serialized data through SPI.
The input channels are individually configurable as
sinking (p-type) or sourcing (n-type) inputs. Current
limiters on each digital input minimize power dissipation
while ensuring compliance with the IEC 61131-2
standard. With a single current-setting resistor, the
inputs are individually configurable for Type 1/3, Type 2,
TTL or HTL (high-impedance 24V levels). The current
sinks or sources can be individually disabled.
Every input channel has a programmable
glitch/debounce filter, and every input channel has an
optional 16-bit down-counter.
The MAX22196 can be powered from a field supply from
8V up to 36V for sink/source operation and has an
integrated 5V linear regulator that can provide up to
20mA of load current.