Jul 29, 2021 #1 O omljiunhbgvfuty Newbie Joined Jul 29, 2021 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 9 I have a EPROM Chip Hitachi HN27C101AG-12 - 32PIN - 128KB, I only have EPROM chip Hitachi HN27C4001G-12 - 32PIN - 512KB in stock are they compatible ?? Thank you in advance.
I have a EPROM Chip Hitachi HN27C101AG-12 - 32PIN - 128KB, I only have EPROM chip Hitachi HN27C4001G-12 - 32PIN - 512KB in stock are they compatible ?? Thank you in advance.
Jul 29, 2021 #2 ZASto Advanced Member level 3 Joined Jan 9, 2008 Messages 822 Helped 158 Reputation 321 Reaction score 152 Trophy points 1,323 Location Messy Corner, 44°47'31.56"N, 20°28'9.16"E Activity points 5,803 For readinc their contents, they are compatible. Upvote 1 Downvote
Jul 29, 2021 #3 KlausST Advanced Member level 7 Joined Apr 17, 2014 Messages 25,194 Helped 4,870 Reputation 9,761 Reaction score 5,548 Trophy points 1,393 Activity points 168,628 Hi, @OP: did you read the datasheets? and what does "compatible" mean? * drop in replacement? * timing, voltage levels, supply current...? From my point of view: No, it´s no drop in replacement. (PIN 30, 31) Klaus Upvote 1 Downvote
Hi, @OP: did you read the datasheets? and what does "compatible" mean? * drop in replacement? * timing, voltage levels, supply current...? From my point of view: No, it´s no drop in replacement. (PIN 30, 31) Klaus
Jul 29, 2021 #4 ZASto Advanced Member level 3 Joined Jan 9, 2008 Messages 822 Helped 158 Reputation 321 Reaction score 152 Trophy points 1,323 Location Messy Corner, 44°47'31.56"N, 20°28'9.16"E Activity points 5,803 Easy fixable for OP. Pull pins 30 and 31 to VCC (31 should already be pulled high during normal operation) and make 4 copies of original EPROM contents, concatenated, and program the 4001. Upvote 0 Downvote
Easy fixable for OP. Pull pins 30 and 31 to VCC (31 should already be pulled high during normal operation) and make 4 copies of original EPROM contents, concatenated, and program the 4001.