1/18December 2001
M27C800
8 Mbit (1Mb x8 or 512Kb x16) UV EPROM and OTP EPROM
a73 5V ± 10% SUPPLY VOLTAGE in READ
OPERATION
a73 ACCESS TIME: 50ns
a73 BYTE-WIDE or WORD-WIDE
CONFIGURABLE
a73 8 Mbit MASK ROM REPLACEMENT
a73 LOW POWER CONSUMPTION
– Active Current 70mA at 8MHz
– Stand-by Current 50µA
a73 PROGRAMMING VOLTAGE: 12.5V ± 0.25V
a73 PROGRAMMING TIME: 50µs/word
a73 ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: B2h
DESCRIPTION
The M27C800 is an 8 Mbit EPROM offered in the
two ranges UV (ultra violet erase) and OTP (one
time programmable). It is ideally suited for micro-
processorsystems requiringlargedataor program
storage. It is organised as either 1 Mwords of 8 bit
or 512 Kwords of 16 bit. The pin-out is compatible
with the most common 8 Mbit Mask ROM.
The FDIP42W (window ceramic frit-seal package)
has a transparent lid which allows the user to ex-
pose the chip to ultraviolet light to erase the bitpat-
tern.
Anew pattern can then be written rapidlyto the de-
vice by following the programming procedure.
For applications where the content is programmed
only one time and erasure is not required, the
M27C800 is offered in PDIP42, PLCC44 and
SO44 packages.
1
42
1
42
44
1
FDIP42W (F) PDIP42 (B)
SO44 (M)PLCC44 (K)
Figure 1. Logic Diagram
AI01593
19
A0-A18
BYTEV
PP
Q0-Q14
V
CC
M27C800
G
E
V
SS
15
Q15A–1