M27V401 Datasheet, PDF (1/15 Pages) STMicroelectronics – 4 Mbit 512Kb x8 Low Voltage UV EPROM and OTP EPROM

M27V401
4 Mbit (512Kb x8) Low Voltage UV EPROM and OTP EPROM
s LOW VOLTAGE READ OPERATION:
3V to 3.6V
s FAST ACCESS TIME: 120ns
s LOW POWER CONSUMPTION:
– Active Current 15mA at 5MHz
– Standby Current 20µA
s PROGRAMMING VOLTAGE: 12.75V ± 0.25V
s PROGRAMMING TIME: 100µs/byte (typical)
s ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 41h
DESCRIPTION
The M27V401 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 524,288 by 8
bits.
The M27V401 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 FDIP32W (window ceramic frit-seal package)
has a transparent lid 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.
Table 1. Signal Names
A0-A18
Address Inputs
Q0-Q7
Data Outputs
E
Chip Enable
G
Output Enable
V_PP
Program Supply
V_CC
Supply Voltage
V_SS
Ground
32
1
FDIP32W (F)
32
1
PDIP32 (B)
PLCC32 (K)
TSOP32 (N)
8 x 20 mm
Figure 1. Logic Diagram
VCC VPP
19
A0-A18
8
Q0-Q7
E
M27V401
G
VSS
AI00695B
May 1998
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