DEI1066
Octal GND/OPEN Input, Serial Output Interface IC

GENERAL DESCRIPTION
The DEI1066 is an eight-channel discrete-to digital interface BICMOS device. It senses eight Ground/Open discrete signals of the type commonly found in avionic systems. The 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.

Features:

• Eight GND/OPEN discrete inputs
  • Meet electrical requirements for ABT100 GND/OPEN discrete input.
  • Hysteresis provides noise immunity
  • Internal pull up resistor with 1mA source current to prevent dry relay contacts.
  • Internal isolation diode
  • Inputs protected from Lightning Induced Transients per DO160D, Section 22, Cat A3 and B3.
• · 3-wire serial interface (/CS, CLK, DO)
  • Direct interface to Serial Peripheral Interface (SPI) port.
  • TTL/CMOS compatible inputs and Tristate output
  • Up to 24MHZ clock rate
  • Serial input to expand Shift Register
• Vlogic: 3.3V and 5 V
• Vanalog: 5 to 18 V
• 16L NB SOIC package
• 16L Ceramic SO Package