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M27W256-80K6TR Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części M27W256-80K6TR
Szczegółowy opis  256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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March 2000
M27W256
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM
s
2.7V to 3.6V SUPPLY VOLTAGE in READ
OPERATION
s
ACCESS TIME:
–70ns at VCC = 3.0V to 3.6V
–80ns at VCC = 2.7V to 3.6V
s
PIN COMPATIBLE with M27C256B
s
LOW POWER CONSUMPTION:
–15
µA max Standby Current
– 15mA max Active Current at 5MHz
s
PROGRAMMING TIME 100
µs/byte
s
HIGH RELIABILITY CMOS TECHNOLOGY
– 2,000V ESD Protection
– 200mA Latchup Protection Immunity
s
ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 3Dh
DESCRIPTION
The M27W256 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 M27W256 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.
For applications where the content is programmed
only one time and erasure is not required, the
M27W256 is offered in PDIP28, PLCC32 and
TSOP28 (8 x 13.4 mm) packages.
Figure 1. Logic Diagram
AI03629
15
A0-A14
Q0-Q7
VPP
VCC
M27W256
G
E
VSS
8
1
28
28
1
FDIP28W (F)
PDIP28 (B)
PLCC32 (K)
TSOP28 (N)
8 x 13.4mm


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