1/17November 2000
M27C4001
4 Mbit (512Kb x 8) UV EPROM and OTP EPROM
■ 5V ± 10% SUPPLY VO LTAGE in READ
OPERATION
■ ACCESS TIME: 35ns
■ LOW POWER CONSUMPTION:
– Active Current 30mA at 5MHz
– Standby Current 100µA
■ PROGRAMMING VOLTAGE: 12.75V ± 0.25V
■ PROGRA MMING TI ME: 100µs/word
■ ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code : 41h
DESCRIPTION
The M 27C4001 is a 4 Mbit EP R OM offe red i n t he
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 allo w the user to ex-
pose the chip to ultr aviolet 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 .
FDIP32W (F)
LCCC32W (L)
PLCC32 (C)
TSOP32 (N)
8 x 20 mm
1
32
32
1
PDIP32 (B)
Figure 1. Logic Diagram
AI00721B
19
A0-A18 Q0-Q7
V
PP
V
CC
M27C4001
V
SS
8
G
E
