توضیحات
ايسي حافظه ي EPROM 2 مگابيتي قابليت پاک شدن توسط اشعه ي ماوراي بنفش با تغذيه ي عملياتي 5 ولت.که هر بايت در عرض 70 نانو ثانيه قابل دسترسي مباشد.
EPROM در واقع مخفف Erasable Programmable Read Only Memory مي باشد. EPROM يک نوع حافظه دائمي است که بر خلاف PROM که نسخه قبلي آن مي باشد امکان برنامه ريزي مجدد را دارد. و از آنجا که نور خورشيد داراي اشعه فرابنفش مي باشد معمولا حافظه EPROM را با پلاستيک يا کريستال مي پوشانند
تا به طور تصادفي در معرض نور خورشيد قرار نگيرد و اطلاعات آن پاک نشود.
Description
The Am27C020 is a 2 Mbit, ultraviolet erasable programmable read-only memory. It is organized as 256K
words by 8 bits per word, operates from a single +5 V
supply, has a static standby mode, and features fast single address location programming. Products are available in windowed ceramic DIP packages, as well as
plastic one-time programmable (OTP) including TSOP,
PLCC, and PDIP.
Typically, any byte can be accessed in less than 70 ns,
allowing operation with high-performance microprocessors without any WAIT states.
DISTINCTIVE CHARACTERISTICS"
* Fast access time
— 70 ns
* Low power consumption
— 100 µA maximum CMOS standby current
* JEDEC-approved pinout
— Plug in upgrade of 1 Mbit EPROM
— Easy upgrade from 28-pin JEDEC EPROMs
* Single +5 V power supply
* ±10% power supply tolerance standard on
most speeds
* 100% Flashrite programming
— Typical programming time of 32 seconds
* Latch-up protected to 100 mA from –1 V to
VCC + 1 V
High noise immunity
* Compact 32-pin DIP, PDIP, TSOP, and PLCC
packages
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