M27C4001
4 Mbit (512Kb x 8) UV EPROM and OTP EPROM
s
5V ± 10% SUPPLY VOLTAGE in READ
OPERATION
ACCESS TIME: 35ns
LOW POWER CONSUMPTION:
– Active Current 30mA at 5MHz
– Standby Current 100µA
1
32
s
s
32
1
s
s
s
PROGRAMMING VOLTAGE: 12.75V ± 0.25V
PROGRAMMING TIME: 100µs/word
ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 41h
FDIP32W (F)
PDIP32 (B)
LCCC32W (L)
DESCRIPTION
The M27C4001 is a 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 programs and
is organised as 524,288 by 8 bits.
The FDIP32W (window ceramic frit-seal package)
and LCCC32W (leadless chip carrier package)
have 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.
For applications where the content is programmed
only one time and erasure is not required, the
M27C4001 is offered in PDIP32, PLCC32 and
TSOP32 (8 x 20 mm) packages.
PLCC32 (C)
TSOP32 (N)
8 x 20 mm
Figure 1. Logic Diagram
VCC
VPP
19
A0-A18
8
Q0-Q7
E
G
M27C4001
VSS
AI00721B
November 2000
1/17
STMICROELECTRONICS [ STMICROELECTRONICS ]
