HT27C020 Datasheet, PDF (1/11 Pages) Holtek Semiconductor Inc – OTP CMOS 256Kx 8-Bit EPROM

HT27C020
OTP CMOS 256K×8-Bit EPROM
Features
• _{Operating voltage: +5.0V}
• _{Programming voltage}
– _{VPP=12.5V±0.2V}
– _{VCC=6.0V±0.2V}
• _{High-reliability CMOS technology}
• _{Latch-up immunity to 100mA from -1.0V to}
VCC+1.0V
• _{CMOS and TTL compatible I/O}
• _{Low power consumption}
– _{Active: 30mA max.}
– _{Standby: 1µA typ.}
• _{256K×8-bit organization}
General Description
The HT27C020 chip family is a low-power,
2048K (2,097,152) bit, +5V electrically one-time
programmable (OTP) read-only memories
(EPROM). Organized into 256K words with 8
bits per word, it features a fast single address
location programming, typically at 75µs per
byte. Any byte can be accessed in less than
Block Diagram
• _{Fast read access time: -70ns, -90ns}
and -120ns
• _{Fast programming algorithm}
• _{Programming time 75µs typ.}
• _{Two line controls (OE and CE)}
• _{Standard product identification code}
• _{Package type}
– _{32-pin DIP/SOP}
– _{32-pin PLCC}
• _{Commercial temperature range}
(0°C to +70°C)
70ns/90ns/120ns with respect to Spec. This
eliminates the need for WAIT states in high-
performance microprocessor systems. The
HT27C020 has separate Output Enable (OE)
and Chip Enable (CE) controls which eliminate
bus contention issues.
1
10th May ’99