Bob Watson

Logic Level Translation - 68HC11F1

Discussion created by Bob Watson on Sep 23, 2008
Latest reply on Sep 25, 2008 by Bob Watson
Logic Level Translation Question Regarding the 68HC11F1

The HC11’s minimum high voltage level input voltage is VDD * 0.7 = 3.5V. Most SRAM’s and UART’s guarantee no less than 2.4 volts output as a logic high, but in some cases are still compatible as their outputs are above 3.5 volts anyway.

Does anyone have any thoughts, suggestions, or experience using a chip such as a 74HCT245, or the like, between the HC11 and the data bus as a level translator? I was thinking about using the  R/W line for control.


Added p/n to subject.

Message Edited by NLFSJ on 2008-09-24 01:34 PM