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4 Threads found on Open Collector Protection
The insulation qualities of open collector transistors are defined by leakage when off and the breakdown voltage Vce(max) and are rated for voltage much higher than Vcc. Whereas CMOS drivers in MCU's are only rated to not exceed the supply rail when in tri-state mode so Sch. diode. protection must be included. open Drain (...)
I am designing a MCU controlled open-collector digital output (MCU control the base of transistor as a switch, output low). The output is assumed max. 26Vdc, 85mA. As transistor has max. reverse Vce of about 5V, I would like to add a reverse polarity protection for the output. In the other words, my device has no problem even the user (...)
hello, Do you think the below implementation of a NAND latch is OK? .....or will the circuit blow up if the "forbiddden" condition ever occurs? NAND latch giving latching overvoltage shutdown protection ...the open collector comparator "MCP65R" comparator feeds into the latch, and the comparator trip
Hello In some pull up configurations (open collector/drain), if you connect more than one of these configurations to the same supply, you connect capacitor between collector/drain (signal line) and GND (aka Wired AND/OR). This is mainly for signal integrity and higher noise immunity. lets say it is easy and cheap way of (...)