28C16 DATASHEET PDF

Category. Description, 16K 2K x 8 Parallel Eeprom with Software DATA Protection. Company, ST Microelectronics, Inc. Datasheet, Download 28C16 datasheet. It is offered only with the TSOP28 package. The reader should refer to the M28C17 datasheet for more information about the Ready/Busy func- tion. OPERATION. FAST ACCESS TIME: 90ns. SINGLE 5V ± 10% SUPPLY VOLTAGE. LOW POWER CONSUMPTION. FAST WRITE CYCLE: – 64 Bytes Page Write Operation.

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A needed a write pulse longer than uS ,nSbut shorter than 1mS 1,nS.

Most new ones withwrite cycles, before data transfers get iffy. Your email is included with the abuse report. Sometimes 2 extra supplies. This situation was usually handled by either running the whole memory space for the slowest device, or for the fastest memory, and then adding ‘wait-states’ for the slower devices. Most sane people don’t spend their time building clocks with antiquated technology!

Writing was a bit different.

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Reminds me of the Old Apple ][ Disk ][ Drives. No contracts, No fees, No Kidding! D to be more accurate: It was an ‘ad-hoc’ job, using pre-existing assemblies.

Anyone familiar with these parts? Thanks anyway for your valuable time. I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built. Hello, Forgive 2c16 slightly off-topic question: It depended on manufacturer. You won’t get anywhere without a data sheet for exactly the parts you have, and even then it’s a lot of work to make a programmer that does the job correctly.

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The intent for these devices was to hold configuration info, and other field alterable data. Back in the late ‘s I had an S based programmer that did ‘s and ‘s. If you write to the same address at one write per 10mS, you’d kill that byte in about 20 minutes. Two 28c61 instead of one Big difference. Reason Report to Moderators I think this message isn’t appropriate for our Group. Once I fixed that it has been great, and the blame goes to the Korean manufacture of my particular unit rather than the design itself.

These requirements are different for different manufacturers and even different part numbers datashedt the same manufacturer. However, if you are looking to program EEPROMs, you may get good ideas from the Willem programmer, as it seems to be open-source of some variety. Again, read the data sheet carefully and make sure it’s for the exact same device and manufacturer. So, I decided to do a little experiment: When I set up my shop a few years ago when I started grad school, I got a programmer from Conitec.

28C16 Datasheet(PDF) – STMicroelectronics

Won’t touch the s I have, though A ZIF socket was inserted in one of those slots. If the user put the cable on wrong, the 74LS would turn into a 74LS mount st helens. I’ve never used the Willem Programmer, I don’t sell it, etc. The 8-bit CPUs back then all had bit address buses and, therefore, a max memory space of 64K 65, bytes. That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences.

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Otherwise, you can write single bytes to it, by pausing after each byte. It was the 70’s think polyester leisure suits. Got away without needing a pulse.

28C16 Datasheet PDF

Mine did arrive with a construction error though, a resistor was the wrong value and caused the programming voltage to be too low and writing would fail most of the time after the first few uses.

Are you sure you wish to delete this message from the message archives of neonixie-l groups. Being from the “so, use a bigger hammer” school of thought, I un- soldered the switcher and instead ran some cables from a nice Lambda 50A regulated bench supply to the programmer.

This cannot be undone. CPU and memory cards where made to accommodate this situation. Search Only Within This Topic. And does anyone suspect that by NOT giving the a precisely timed pulse, that I may have damaged it? Chuck Richards Chuck, The is an electrically-erasable version of the