HT27LC020 Datasheet, PDF (1/15 Pages) Holtek Semiconductor Inc – OTP CMOS 256Kx 8-Bit EPROM

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
· 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.
· 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
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
Block Diagram
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.
R ow
A d d re s s
C o lu m n
A d d re s s
CE
OE
PG M
X -D e c o d e r
Y -D e c o d e r
CE & OE &
PG M & TEST
C o n tr o l L o g ic
C e ll A r r a y
Y - G a tin g
SA CKT
&
O u tp u t B u ffe r
VCC
GND
VPP
D Q 0~D Q 7
Rev. 1.50
1
December 8, 2003