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M27V256-100B1TR fiches techniques PDF

STMicroelectronics - 256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM

Numéro de référence M27V256-100B1TR
Description 256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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M27V256-100B1TR fiche technique
M27V256
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM
s LOW VOLTAGE READ OPERATION:
3V to 3.6V
s FAST ACCESS TIME: 90ns
s LOW POWER CONSUMPTION:
– Active Current 10mA at 5MHz
– Standby Current 10µA
s PROGRAMMING VOLTAGE: 12.75V ± 0.25V
s PROGRAMMING TIME: 100µs/byte (typical)
s ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 8Dh
DESCRIPTION
The M27V256 is a low voltage 256 Kbit EPROM
offered in the two ranges UV (ultra violet erase)
and OTP (one time programmable). It is ideally
suited for microprocessor systems and is orga-
nized as 32,768 by 8 bits.
The M27V256 operates in the read mode with a
supply voltage as low as 3V. The decrease in op-
erating power allows either a reduction of the size
of the battery or an increase in the time between
battery recharges.
The FDIP28W (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 to the
device by following the programming procedure.
28
1
FDIP28W (F)
28
1
PDIP28 (B)
PLCC32 (K)
TSOP28 (N)
8 x 13.4mm
Figure 1. Logic Diagram
VCC VPP
15
A0-A14
8
Q0-Q7
Table 1. Signal Names
A0-A14
Address Inputs
Q0-Q7
Data Outputs
E Chip Enable
G Output Enable
VPP Program Supply
VCC Supply Voltage
VSS Ground
E M27V256
G
VSS
AI01908
May 1998
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