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Details, datasheet, quote on part number: DEI1166-TMS-G
 
 
Part numberDEI1166-TMS-G
CategoryCommunication and Interfaces => IC Interfaces => IC Interfaces => 6102401
TitleSPECIALTY INTERFACE CIRCUIT, PDSO24
Description
Specifications
TechnologyBICMOS
Supply Voltage3.3V, Other, 14
Operating Temperature-55 to 85 C (-67 to 185 F)
Package TypeTSSOP, PLASTIC, TSSOP-24
Pins24
CompanyDevice Engineering Incorporated
DatasheetDownload DEI1166-TMS-G datasheet
 
 
Specifications, Features, Applications

385 E. Alamo Dr. Chandler, AZ 85225 Phone: (480) 303-0822 Fax: (480) 303-0824 E-mail: admin@deiaz.com

DEI1166 OCTAL GND/OPEN INPUT, PARALLEL OUTPUT INTERFACE IC
FEATURES

Eight GND/OPEN discrete inputs o Meet electrical requirements for ABD0100 GND/OPEN discrete input. o Hysteresis provides noise immunity. o Internal pull up resistor with 1mA source current to prevent dry relay contacts. o Internal isolation diode o Inputs protected from Lightning Induced Transients per DO160D, Section 22, Cat A3 and or 5V TTL/CMOS compatible digital o 8 tri-state outputs o /CS & /OE control inputs Logic Supply: or 5V Analog Supply: 18V 24L TSSOP package

Table 1 Pin Descriptions Pins Name DIN[8:1] NC /CS /OE VDD GND VCC GND DO[8:1] Description Discrete Inputs. Eight Ground/Open format discrete signals. These have an internal pull-up to VDD. The threshold and hysteresis characteristics are determined by the applied VDD voltage. Not Connected. Chip Select Logic Input. Low input selects the device. Output Enable Logic Input. Low input when /CS is low will enable the tristate outputs. Analog Supply. to +18V Analog Ground. Logic Supply. or +5V Logic Ground. Logic Outputs. Eight tri-state data outputs.

The is an eight-channel parallel-output 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 a parallel 3-state output.


Table 2 Truth Table /CE /OE DIN[8:1] Open Ground L H High Z High Z

Each DINn signal is conditioned by the resistor / diode network and presented to the comparator IN+ as shown in Figure 2. The reference and hysteresis voltage is developed at the comparator IN-. Some notable features are: When Vdd is +15V, the circuit shall source to a grounded input. This current will prevent a "dry" relay contact. The input threshold voltage and hysteresis varies with the Vdd supply. o For Vdd of +5V, VILmax = 3.5V, VIHmin 4.8V o For Vdd of +14V, VILmax = 11.5V, VIHmin 13.5V o Hysteresis is approximately as shown in Figure 3. The inputs can withstand continuous input voltages of 40V maximum. The isolation diode breakdown voltage is greater than 50V. The 12K Ohm input resistor is designed to limit diode breakdown current to safe levels during transient events.

The input thresholds vary with the Vdd supply voltage as shown below.



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