Other Parts Discussed in Thread: DS90LV001, SN65LVDS32, SN65LVDS050, SN65LVDS33, SN65LVDS349, DS90LV012A, SN65MLVD048
ATIA/EIA-644-A standard allows multiple receiver operation and I used DS90LV032A and MAX9180 receivers on the one line. Both receivers have fail-safe circuit for termainated input case therefore I supposed correct work. But as a result MAX9180 fail-safe circuit turns up incompatible with undescribed DS90LV032A fail-safe circuit. MAX9180 parallel fail-safe circuit (as it is described in the datasheet and 3662 app note) pulls-up LVDS lines via (232k || 232k) and 1,1M common resistor and DS90LV032A (as it turns out) pulls LVDS line down via undefined resistor or current source, I don' t know. If only DS90LV032 connects to the floating terminated LVDS line, common mode voltage is near 50 mV. If only MAX9180 receiver connected on the floating terminated LVDS line, common mode voltage is near 2,9 V. And when DS90LV032A and MAX9180 connected together to the terminated floating LVDS line, the common mode voltage is near 250 mV and MAX9180 fail-safe circuit does not work. Please describe how to use DS90LV032A receiver mutually with receivers with other fail-safe circuits because DS90LV032A fail-safe circuit details is hidden.
