M27C4002
4 Mbit (256Kb x16) UV EPROM and OTP EPROM
5V
±
10% SUPPLY VOLTAGE in READ
OPERATION
FAST ACCESS TIME: 45ns
LOW POWER CONSUMPTION:
– Active Current 70mA at 10MHz
– Standby Current 100µA
PROGRAMMING VOLTAGE: 12.75V
±
0.25V
PROGRAMMING TIME: 100µs/byte (typical)
ELECTRONIC SIGNATURE
– Manufacturer Code: 0020h
– Device Code: 0044h
40
40
1
1
FDIP40W (F)
PDIP40 (B)
JLCC44W (J)
DESCRIPTION
The M27C4002 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 262,144 words of 16 bits.
The FDIP40W (window ceramic frit-seal package)
and the JLCC44W (J-lead chip carrier packages)
have transparent lids which allow the user to ex-
pose the chip to ultraviolet light to erase the bit
pattern. 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
M27C4002 is offered in PDIP40, PLCC44 and
TSOP40 (10 x 20 mm) packages.
PLCC44 (C)
TSOP40 (N)
10 x 20 mm
Figure 1. Logic Diagram
VCC
VPP
18
A0-A17
16
Q0-Q15
Table 1. Signal Names
A0-A17
Q0-Q15
E
G
V
PP
V
CC
V
SS
September 1998
Address Inputs
Data Outputs
Chip Enable
Output Enable
Program Supply
Supply Voltage
Ground
E
G
M27C4002
VSS
AI00727B
1/16
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