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M27256-20F1 データシート(PDF) 1 Page - STMicroelectronics

部品番号 M27256-20F1
部品情報  NMOS 256K 32K x 8 UV EPROM
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M27256-20F1 データシート(HTML) 1 Page - STMicroelectronics

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NOT FOR NEW DESIGN
November 2000
This is information on a product still in production but not recommended for new designs.
M27256
NMOS 256 Kbit (32Kb x 8) UV EPROM
s
FAST ACCESS TIME: 170ns
s
EXTENDED TEMPERATURE RANGE
s
SINGLE 5V SUPPLY VOLTAGE
s
LOW STANDBY CURRENT: 40mA max
s
TTL COMPATIBLE DURING READ and
PROGRAM
s
FAST PROGRAMMING ALGORITHM
s
ELECTRONIC SIGNATURE
s
PROGRAMMING VOLTAGE: 12V
DESCRIPTION
The M27256 is a 262,144 bit UV erasable and
electrically programmable memory EPROM. It is
organized as 32.768 words by 8 bits.
The M27256 is housed in a 28 pin Window Ceram-
ic Frit-Seal Dual-in-Line package. The transparent
lid allows the user to expose the chip to ultraviolet
light to erase the bit pattern. A new pattern can
then be written to the device by following the pro-
gramming procedure.
Figure 1. Logic Diagram
AI00767B
15
A0-A14
Q0-Q7
VPP
VCC
M27256
G
E
VSS
8
1
28
FDIP28W (F)


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