HT27LC512 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – OTP CMOS 64Kx 8-Bit EPROM

HT27LC512
OTP CMOS 64K×8-Bit EPROM
Features
• _{64K×8-bit organization}
• _{Single +3.3V power supply}
• _{Programming voltage}
– _{VPP=12.2V±0.2V}
– _{VCC=5.8V±0.2V}
• _{Low power consumption}
– _{Active: 15mA max.}
– _{Standby: 1µA typ.}
• _{Fast read access time: 120ns}
• _{CMOS and TTL compatible I/O}
• _{Commercial and industrial temperature range}
• _{Fast programming algorithm}
• _{Read access time: –120ns}
• _{Programming time 75µs typ.}
• _{High-reliability CMOS technology}
• _{Latch-up immunity to 100mA from -1.0V to}
VCC+1.0V
• _{Two line control (OE & CE)}
• _{Standard product identification code}
• _{Package type}
– _{28-pin DIP/SOP}
– _{32-pin PLCC}
• _{Commercial temperature ranges}
(0°C to +70°C)
General Description
The HT27LC512 chip family is a low-power,
512K bit, +3.3V electrically one-time pro-
grammable (OTP) read-only memories
(EPROM). Organized into 64K 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 120ns
with respect to Spec. This eliminates the need for
WAIT states in high-performance microprocessor
systems. The HT27LC512 has separate Output Enable
(OE) and Chip Enable (CE) controls which
eliminate bus contention issues.
Block Diagram
1
6th May ’99