Microchip Technology EPROM 1

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Part RoHS Manufacturer Memory IC Type Temperature Grade No. of Terminals Package Code Package Shape Package Body Material Surface Mount No. of Functions Technology Screening Level Nominal Negative Supply Voltage Terminal Form Parallel or Serial Operating Mode Maximum Supply Current No. of Words Input/Output Type Nominal Supply Voltage / Vsup (V) Power Supplies (V) Memory Width Package Style (Meter) Package Equivalence Code Alternate Memory Width Sub-Category Terminal Pitch Maximum Operating Temperature Output Characteristics Organization No. of Words Code Minimum Operating Temperature Terminal Finish Terminal Position JESD-30 Code Moisture Sensitivity Level (MSL) Maximum Supply Voltage (Vsup) Maximum Seated Height Width Qualification Memory Density Minimum Supply Voltage (Vsup) Additional Features JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Maximum Standby Current Length Maximum Access Time Programming Voltage (V)

27C256-10I/P

Microchip Technology

EPROM

INDUSTRIAL

28

DIP

RECTANGULAR

PLASTIC/EPOXY

NO

1

CMOS

THROUGH-HOLE

PARALLEL

ASYNCHRONOUS

25 mA

32768 words

COMMON

5

5

8

IN-LINE

DIP28,.6

OTP ROMs

2.54 mm

85 Cel

3-STATE

32KX8

32K

-40 Cel

TIN LEAD

DUAL

R-PDIP-T28

5.5 V

4.83 mm

15.24 mm

Not Qualified

262144 bit

4.5 V

DATA RETENTION >200 YEARS

e0

.0001 Amp

36.32 mm

100 ns

5

EPROM

EPROM, or Erasable Programmable Read-Only Memory, is a type of non-volatile computer memory that can be programmed and erased multiple times. EPROM was commonly used in computer systems and electronic devices in the 1970s and 1980s, but has largely been replaced by more advanced memory technologies.

EPROM works by storing data in a grid of memory cells that can be individually programmed and erased using ultraviolet light. Each memory cell consists of a transistor and a floating gate. To program the memory cell, a high voltage is applied to the transistor, which charges the floating gate. To erase the memory cell, ultraviolet light is applied to the chip, which removes the charge from the floating gate. The programming and erasing process can be repeated multiple times, making EPROM a reprogrammable memory technology.

EPROM has several advantages over other types of computer memory, such as ROM and RAM. EPROM can be reprogrammed multiple times, which makes it a versatile and flexible memory technology. EPROM is also non-volatile, which means that it can store data even when the power is turned off. This makes it ideal for storing critical data, such as system settings and firmware.