HT27LC040
CMOS 512K´8-Bit OTP EPROM
Features
·
Operating voltage: +3.3V
·
Programming voltage
-
V
PP
=12.5V±0.2V
-
V
CC
=6.0V±0.2V
·
High-reliability CMOS technology
·
Latch-up immunity to 100mA from
-1.0V
to
·
512K´8-bits organization
·
Fast read access time: 90ns
·
Fast programming algorithm
·
Programming time 75ms typ.
·
Two line controls (OE and CE)
·
Standard product identification code
·
Commercial temperature range (0°C to +70°C)
·
32-pin DIP/SOP/TSOP/PLCC package
V
CC
+1.0V
·
CMOS and TTL compatible I/O
·
Low power consumption
-
Active: 15mA max.
-
Standby: 1mA typ.
General Description
The HT27LC040 chip family is a low-power, 4096K
(4,194,304) bits, +3.3V electrically one-time program-
mable (OTP) read-only memories (EPROM). Organized
into 512K words with 8 bits per word, it features a fast
single address location programming, typically at 75ms
per byte. Any byte can be accessed in less than 90ns
with respect to Spec. This eliminates the need for WAIT
states in high-performance microprocessor systems.
The HT27LC040 has separate Output Enable (OE) and
Chip Enable (CE) controls which eliminate bus conten-
tion issues.
Block Diagram
R o w
A d d re s s
C o lu m n
A d d re s s
X -D e c o d e r
C e ll A r r a y
V C C
Y -D e c o d e r
Y - G a tin g
V S S
V P P
C E
O E
C E & O E &
T E S T
C o n tr o l L o g ic
S A C K T
&
O u tp u t B u ffe r
D Q 0 ~ D Q 7
Rev. 1.30
1
December 8, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
