MT72038
VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS
1
FOUR CHANNEL ARINC 429 LINE RECEIVER
Converts received ARINC 429 data levels to
2 line CMOS compatible levels
Adjustable threshold using 1 resistor
Single 5V supply with low power
consumption
<
50mW
Full MIL operating range
Reduces system package count.
Can be used as ARINC 429, 561, 568, 575,
or Tacan interface
MT72038
VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS
2
MAXIMUM RATINGS
(Above which the useful life may be impaired)
Storage Temperature - 65C to +150C
Temperature (Ambient) under Bias - 55C to +125C
Supply Voltage VDD -0.3V to + 7V
DC Input Voltage -0.3 to VDD +0.3V
Output Current (Single O/P) 10mA
Output Current (Total O/P) 20mA
ELECTRICAL CHARACTERISTICS over operating range
PARAMETER
DESCRIPTION
TEST CONDITIONS
MIN
TYP
MAX
UNITS
IOH
Output High Current
VOH=2.8V
VDD=
4.5V
80
mA
IOL
Output Low Current
VOL=0.4V
1
mA
VIH
Input High Voltage
NOTE 1
-6.5
VCC
Volts
VIL
Input Low Voltage
NOTE 1
-2.5
0.8
Volts
CI
Input Capacitance
Test Frequency = 1.0 MHZ
2
40
pF
CI/O
I/O Capacitance
7
40
pF
IDD
Supply Current
VDD = MAX. All inputs
LOW, All outputs open
.
10
2.6
mA
NOTE 1
Voltage applied to inputs of recommended circuit.
APPLICATION NOTE
The circuit below may be used to interface with a single channel of ARINC 561/568.
MT72038
VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS
3
This device together
with associated resistors meets the I/P requirements of ARINC 429
specification for 4 independent channels of input. It consists of 4 pairs of Norton type CMOS
comparators with a common current mirror threshold circuit set by a single external resistor.
Each pair of comparators requires a 15K resistor across the ARINC I/P and 43K between each
ARINC single line and the low impedance inputs. High common mode rejection is achieved so that
if one input wire is removed from the Receiver Circuit, there is no output signal.
Internal clamping diodes are present providing full protection from external transients of > 600V for
luS or 100V continuous at the 43K to ARINC interface.
The package operates from a single 5V supply taking typically a total of 10mA over the full MIL
temperature range.
RECOMMENDED CIRCUIT
MT72038
VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS
4
Pin Compatible replacement for MT60005 and MT60009
NOTE : THRESHOLD RESISTOR VALUE CHANGE IN REPLACEMENT.
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