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DEI1198-TMS-G

DEI1198-TMS-G is an 8-channel, parallel 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 logic data. The discrete data is read from the device via a parallel tri-state bus.


Features

  • Eight discrete inputs
    • Senses GND/OPEN discrete signals.
    • Meets input threshold and hysteresis requirements specified per AirBus ABD0100H specification.
      • Thresholds: 4.5 V / 10.5 V, Hysteresis: 3 V
    • ~1 mA DIN source/sink current to prevent dry relay contacts.
    • Internal isolation diode.
    • Uses an external 3 kΩ resistor on the inputs to implement lightning transient immunity of 1600 V and higher. i.e.:  DO160E, Section 22, Levels 4 and 5.
    • Inputs protected from Lightning Induced Transients per DO160, Section 22, Cat A3 and B3 plus waveform 5A to 500 V.
  • Parallel I/O interface
    • TTL/CMOS compatible inputs and Tristate outputs
    • CLK  & /OE control inputs and outputs
  • Logic Supply Voltage (VCC): 3 V ±%
  • Analog Supply Voltage (VDD): 0 V to 16.5 V
  • Package Options
    • 24 Lead TSSOP EP Thermally Enhanced

Attributes

temp range: -55 to 125
product package type: 24 TSSOP EP G
burn in:
channels: 8
lightning protection:
Years to EOL: 10
errata sheets: ES-MW-01198-02-A.pdf
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: 24 Pin Thin Shrink SO Package w/ Exposed Pad
package type: Surface Mount
ds doc number: DS-MW-01198-01
JEDEC: MO-153-AD
RoHS:
product status: Active

Functional Description

DEI1198 is an eight-channel parallel 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 logic data.  The discrete data is read from the device via a parallel tri-state bus.

The discrete input circuits are designed to achieve a high level of lightning transient immunity.  The application design requires a series 3 kΩ resistor on each discrete input to achieve DO160 Level 3 and WF5A 500 V pin injection 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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