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M27C400-100B6TR Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte M27C400-100B6TR
Spiegazioni elettronici  4 Mbit (512Kb x8 or 256Kb x16) UV EPROM and OTP EPROM
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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May 1999
M27C400
4 Mbit (512Kb x8 or 256Kb x16) UV EPROM and OTP EPROM
s
5V ± 10% SUPPLY VOLTAGE in READ
OPERATION
s
ACCESS TIME: 55ns
s
BYTE-WIDE or WORD-WIDE
CONFIGURABLE
s
4 Mbit MASK ROM REPLACEMENT
s
LOW POWER CONSUMPTION
– Active Current 70mA at 8MHz
– Stand-by Current 100µA
s
PROGRAMMING VOLTAGE: 12.5V ± 0.25V
s
PROGRAMMING TIME: 100µs/word
s
ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: B8h
DESCRIPTION
The M27C400 is an 4 Mbit EPROM offered in the
two ranges UV (ultra violet erase) and OTP (one
time programmable). It is ideally suited for micro-
processor systems requiring large data or program
storage. It is organised as either 512 Kwords of 8
bit or 256 Kwords of 16 bit. The pin-out is compat-
ible with the most common 8 Mbit Mask ROM.
The FDIP40W (window ceramic frit-seal package)
has a transparent lid which allows the user to ex-
pose the chip to ultraviolet light to erase the bit pat-
tern.
A new pattern can then be written rapidly to the de-
vice by following the programming procedure.
For applications where the content is programmed
only one time and erasure is not required, the
M27C400 is offered in PDIP40 package.
1
40
1
40
FDIP40W (F)
PDIP40 (B)
Figure 1. Logic Diagram
AI01634
18
A0-A17
BYTEVPP
Q0-Q14
VCC
M27C400
G
E
VSS
15
Q15A–1


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