MT72038 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 VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS 1 MT72038 MAXIMUM RATINGS (Above which the useful life may be impaired) Storage Temperature Temperature (Ambient) under Bias Supply Voltage VDD DC Input Voltage Output Current (Single O/P) Output Current (Total O/P) - 65ºC to +150ºC - 55ºC to +125ºC -0.3V to + 7V -0.3 to VDD +0.3V 10mA 20mA ELECTRICAL CHARACTERISTICS over operating range PARAMETER IOH IOL VIH VIL CI CI/O IDD NOTE 1 DESCRIPTION Output High Current Output Low Current Input High Voltage Input Low Voltage Input Capacitance I/O Capacitance Supply Current TEST CONDITIONS VOH=2.8V VDD= 4.5V VOL=0.4V NOTE 1 NOTE 1 Test Frequency = 1.0 MHZ VDD = MAX. All inputs LOW, All outputs open. MIN 80 1 -6.5 -2.5 TYP 2 7 10 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. VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS 2 MAX UNITS VCC 0.8 40 40 2.6 mA mA Volts Volts pF pF mA MT72038 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 VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS 3 MT72038 Pin Compatible replacement for MT60005 and MT60009 NOTE : THRESHOLD RESISTOR VALUE CHANGE IN REPLACEMENT. VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS 4