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M87C257-60XF6TR Datasheet(PDF) 5 Page - STMicroelectronics

Part # M87C257-60XF6TR
Description  Address Latched 256 Kbit (32Kb x8) UV EPROM and OTP EPROM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M87C257-60XF6TR Datasheet(HTML) 5 Page - STMicroelectronics

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M87C257
Description
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1
Description
The M87C257 is a 256 Kbit EPROM offered in the two ranges UV (ultra violet erase) and
OTP (one time programmable). It incorporates latches for all address inputs to minimize chip
count, reduce cost, and simplify the design of multiplexed bus systems and is organized as
32,768 by 8 bits.
The FDIP28W (window ceramic frit-seal package) has a transparent lid which 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 programming procedure.
For applications where the content is programmed only one time and erasure is not
required, the M87C257 is offered in PLCC32 package.
In order to meet environmental requirements, ST offers the M87C257 in ECOPACK®
packages.
ECOPACK packages are Lead-free. The category of second Level Interconnect is marked
on the package and on the inner box label, in compliance with JEDEC Standard JESD97.
The maximum ratings related to soldering conditions are also marked on the inner box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 1.
Logic diagram
AI00928B
15
A0-A14
ASVPP
Q0-Q7
VCC
M87C257
G
E
VSS
8


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