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DEI1184-SES

DEI1184-SES

DEI1184 is an eight-channel discrete-to digital interface IC implemented in an HV DIMOS technology. It senses eight discrete signals of the type commonly found in avionic systems and converts them to serial logic data. Each input can be individually configured as either GND/OPEN or 28V/OPEN format input via a serial data input. The discrete data is read from the device via an eight-bit serial shift register with 3-state output. This serial interface is compatible with the industry standard Serial Peripheral Interface (SPI) bus.


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Features

  • Eight discrete inputs
  • Individually configurable as either GND/OPEN or 28V/OPEN (or 28V/GND) format input.
  • Input threshold and hysteresis per Airbus ABD0100H specification.
  • GND/OPEN mode: 4.5 V / 10.5 V input levels, 3 V hysteresis
  • 28V/OPEN mode: 6 V / 12 V input levels, 3V hysteresis
  • 1mA input current to prevent dry relay contacts.
  • Internal isolation diode in GND/OPEN mode.
  • Uses external series 3 kΩ resistors on inputs to implement lightning transient immunity of DO160, Section 22Level 3, and higher levels with the addition of small TVS devices.
  • Serial I/O interface to read data register and write configuration register
  • Direct interface to Serial Peripheral Interface (SPI) port.
  • TTL/CMOS compatible inputs and Tristate output
  • 10 MHZ Max Data Rate
  • Serial input to expand Shift Register
  • Logic Supply Voltage (VCC): 3.3 V +/-5%
  • Analog Supply Voltage (VDD): 15 V +/-10%
  • 16L SOIC EP package

Attributes

temp range: -55°C - 85°C
product package type: 16 SOIC EP NB
burn in:
channels: 8
lightning protection:
Years to EOL: 10
tri state outputs:
fused outputs:
Analog PSU: 15
Digital PSU: 3.3
ABD0100:
discrete input: GND/OPENor28V/OPEN
output type: serial
prog input threshold:
package description: 16 Pin Plastic SOIC - .150 Body Exp Pad
package type: Surface Mount
JEDEC: MS-012-AC
RoHS:
Product Status: Active
PCN Links:CN-MW-01184-01-A.pdfCN-MW-01184-02-A.pdf

Functional Description DEI1184 is an eight-channel discrete-to digital interface IC implemented in an HV DIMOS technology. It senses eight discrete signals of the type commonly found in avionic systems and converts them to serial logic data. Each input can be individually configured as either GND/OPEN or 28V/OPEN format input via a serial data input. The discrete data is read from the device via an eight-bit serial shift register with 3-state output. This serial interface is compatible with the industry standard Serial Peripheral Interface (SPI) bus. The discrete input circuits are designed to achieve a high level of lightning transient immunity. The application design provides a series 3 kΩ resistor on each discrete input to achieve DO160E Level 3 and WF5A 500 V immunity. Higher immunity levels can be achieved (i.e. Level 5) with the addition of a TVS between the resistor and the input pin.

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