DEI1073 Datasheet | Device Engineering

FEATURES - TTL/CMOS TO ARINC 429 Line Driver. - Rate control input set Hi (100KBS) or Lo (12.5KBS) speed slew rates. - Operates from ±9.5V to ±16.5V power supply. - Drives full ARINC load. - Output resistor options: 0, 10 or 37.5 Ohms. - Tristate Outputs - Thermally enhanced 8 lead SOIC package. - Outputs Short Circuit Tolerant GENERAL DESCRIPTION The DEI1073 family of 8 pin Bi CMOS integrated circuits are line drivers designed to directly drive the ARINC 429 avionics serial digital data bus. The device converts TTL/CMOS serial input data to the tri-level RZ bipolar differential modulation format of the ARINC bus. The outputs are tri-state capable. A TTL/CMOS control input selects the output slew rate for HI (100KBS) and LOW (12.5KBS) speed operation. No external timing capacitors are required. The DEI1073 has internal 37.5 Ohm output resistors, the DEI1074 has 10 Ohm resistors, and the DEI1075 has none. The 10 and 0 Ohm options require external series resistors which are typically used to implement a transient voltage protection network. Table 1 PIN DESCRIPTION PIN 1 HI/LO TTLIN0 TTLIN1 GND 1 8 NAME HI/LO TTLIN0 TTLIN1 GND V429OUTA DESCRIPTION LOGIC INPUT. Slew rate control. 1 = Hi speed. 0 = Low speed. LOGIC INPUT. Serial digital data input 0. LOGIC INPUT. Serial digital data input 1. POWER INPUT. Ground. POWER INPUT. - 9.5 to - 16.5 VDC 429 OUTPUT. ARINC 429 format serial digital data output A. 429 OUTPUT. ARINC 429 format serial digital data output B. POWER INPUT. +9.5 to +16.5 VDC. V+ 429OUTB 429OUTA V- 2 3 4 5 6 Note: Heatsink pad is electrically Isolated. 7 8 429OUTB V+ ©2004 Device Engineering Inc Page 1 of 8 DS-MW-01073-01 Rev C 05/31/2005 .. FUNCTIONAL DESCRIPTION HI/LO TTLIN1 TTLIN0 INPUT LOGIC and LEVEL SHIFT EDGE SHAPING OUTPUT DRIVERS 429OUTA 429OUTB TRI-STATE...