Jun 16, 2012 #1 E ergman Newbie level 5 Joined Jun 16, 2012 Messages 9 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,341 Hey guys..can anyone explain me the following sentence(in context of port0 of uC8051) : "As an output port,each pin of port 0 can sink eight TTL inputs." thnx..
Hey guys..can anyone explain me the following sentence(in context of port0 of uC8051) : "As an output port,each pin of port 0 can sink eight TTL inputs." thnx..
Jun 16, 2012 #2 W wp100 Advanced Member level 6 Joined May 15, 2009 Messages 3,051 Helped 884 Reputation 1,783 Reaction score 733 Trophy points 113 Location Prime Meridian Activity points 0 Hi, The TTL range of chips like the 7400 +5v series need a small current to drive their inputs, about 1.6ma if I remember correctly. A port pin 0 of the 8051 can source enough current to drive 8 input gates of the TTL chips. See the data sheet for exact specificaion of current handling or a tutorial like this http://www.kpsec.freeuk.com/components/ic.htm
Hi, The TTL range of chips like the 7400 +5v series need a small current to drive their inputs, about 1.6ma if I remember correctly. A port pin 0 of the 8051 can source enough current to drive 8 input gates of the TTL chips. See the data sheet for exact specificaion of current handling or a tutorial like this http://www.kpsec.freeuk.com/components/ic.htm
Jun 17, 2012 #3 E ergman Newbie level 5 Joined Jun 16, 2012 Messages 9 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,341 thanx wp100