HT27LC020
CMOS 256K´8-Bit OTP EPROM
Features
·
Operating voltage: +3.3V
·
Programming voltage
-
V
PP
=12.5V±0.2V
-
V
CC
=6.0V±0.2V
·
256K´8-bit 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 ranges (0°C to +70°C)
·
32-pin DIP/SOP/TSOP/PLCC package
·
High-reliability CMOS technology
·
Latch-up immunity to 100mA from -1.0V to
V
CC
+1.0V
·
CMOS and TTL compatible I/O
·
Low power consumption
-
Active: 15mA max.
-
Standby: 1mA typ.
General Description
The HT27LC020 chip family is a low-power, 2048K
(2,097,152) bit, +3.3V electrically one-time programma-
ble (OTP) read-only memories (EPROM). Organized
into 256K 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 HT27LC020 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
C E
O E
P G M
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
G N D
V P P
C E & O E &
P G M & 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. 1.50
1
December 8, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
