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DEI1188-SMS

DEI1188-SMS

DEI1188 is an eight-channel discrete-to-digital interface IC implemented in an HV DIMOS technology. It senses eight GND/OPEN discrete signals of the type commonly found in avionic systems and converts them to serial logic data. 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
  • Senses GND/OPEN discrete signals.
  • Meet input threshold and hysteresis requirements specified per Airbus ABD0100H specification.
  • Thresholds: 4.5 V / 10.5 V, Hysteresis: 3V
  • 1 mA input current to prevent dry relay contacts.
  • Internal isolation diode.
  • Uses external series 3 kΩ resistors on inputs to implement lightning transient immunity of DO160, Section 22 Level 3, and higher levels with the addition of small TVS devices.
  • Inputs protected from Lightning Induced Transients per DO160E, Section 22, Cat A3 and B3 plus waveform 5A to 500 V.
  • Serial I/O interface to read data 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
  • Pin compatible with DEI1066
  • Logic Supply Voltage (VCC): 3.3 V +/-5%
  • Analog Supply Voltage (VDD): 12.0 V to 16.5 V
  • 16L SOIC EP package

Attributes

temp range: -55°C - 125°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: 12-16.5
Digital PSU: 3.3
ABD0100:
discrete input: OPEN/GND
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-01188-01-A.pdfCN-MW-01188-02-A.pdf

Functional Description DEI1188 is an eight-channel discrete-to-digital interface IC implemented in an HV DIMOS technology. It senses eight GND/OPEN discrete signals of the type commonly found in avionic systems and converts them to serial logic data. 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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