UTMonkey Member Jun 2, 2008 #1 Hi All, I am about to embark on an SD Card project which will involve mixing 3.3 and 5v signals. A 74LCX245 has been recommended which looks perfect (Logic Converter Mini Board) except I would rather have a quad version. Not being an expert on datasheets I am having trouble matching the features of this chip with a possible 4 port "cousin". Can anyone help? Best Wishes Mark
Hi All, I am about to embark on an SD Card project which will involve mixing 3.3 and 5v signals. A 74LCX245 has been recommended which looks perfect (Logic Converter Mini Board) except I would rather have a quad version. Not being an expert on datasheets I am having trouble matching the features of this chip with a possible 4 port "cousin". Can anyone help? Best Wishes Mark
crutschow Well-Known Member Most Helpful Member Jun 2, 2008 #2 Generally, standard logic parts are not built in multiple versions since the large number of I/Os would require a big and expensive package. Standard logic is seldom found in packages larger than about 28 pins.
Generally, standard logic parts are not built in multiple versions since the large number of I/Os would require a big and expensive package. Standard logic is seldom found in packages larger than about 28 pins.
Mikebits Well-Known Member Jun 2, 2008 #3 The 74LCX16245 is the 16 bit version. 48 pin device. https://www.electro-tech-online.com/custompdfs/2008/06/74LCX16245.pdf
The 74LCX16245 is the 16 bit version. 48 pin device. https://www.electro-tech-online.com/custompdfs/2008/06/74LCX16245.pdf
UTMonkey Member Jun 3, 2008 #5 Bill, The 245 only converts one direction at a time. Click to expand... Is that a problem for an SD Card project? Mark
Bill, The 245 only converts one direction at a time. Click to expand... Is that a problem for an SD Card project? Mark