M27W402 Datasheet, PDF (1/15 Pages) STMicroelectronics – 4 Mbit 256Kb x16 Low Voltage UV EPROM and OTP EPROM

M27W402
4 Mbit (256Kb x16) Low Voltage UV EPROM and OTP EPROM
s 2.7V to 3.6V SUPPLY VOLTAGE in READ
OPERATION
s ACCESS TIME:
– 80ns at V_CC = 3.0V to 3.6V
– 100ns at V_CC = 2.7V to 3.6V
s PIN COMPATIBLE with M27C4002
s LOW POWER CONSUMPTION:
– 15µA max Standby Current
– 15mA max Active Current at 5MHz
s PROGRAMMING TIME 100µs/word
s HIGH RELIABILITY CMOS TECHNOLOGY
– 2,000V ESD Protection
– 200mA Latchup Protection Immunity
s ELECTRONIC SIGNATURE
– Manufacturer Code: 0020h
– Device Code: 0044h
40
1
FDIP40W (F)
40
1
PDIP40 (B)
PLCC44 (K)
TSOP40 (N)
10 x 20 mm
Figure 1. Logic Diagram
DESCRIPTION
The M27W402 is a low voltage 4 Mbit EPROM of-
fered in the two range UV (Ultra Violet Erase) and
OTP (one time programmable). It is ideally suited
for microprocessor systems requiring large data or
program storage and is organised as 262,144 by
16 bits.
The M27W402 operates in the read mode with a
supply voltage as low as 2.7V at –40 to 85°C tem-
perature range. The decrease in operating power
allows either a reduction of the size of the battery
or an increase in the time between battery re-
charges.
The FDIP40W (window ceramic frit-seal package)
has a transparent lids which allow 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
M27W402 is offered in PDIP40, PLCC44 and
TSOP40 (10 x 20 mm) packages.
VCC VPP
18
A0-A17
16
Q0-Q15
E
M27W402
G
VSS
AI01863
March 2000
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