HT27C512 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – OTP CMOS 64Kx 8-Bit EPROM

HT27C512
OTP CMOS 64K×8-Bit EPROM
Features
• _{Operating voltage: +5.0V}
• _{Programming voltage}
– _{VPP=12.2V±0.2V}
– _{VCC=5.8V±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.}
General Description
The HT27C512 chip family is a low-power,
512K bit, +5V electrically one-time programma-
ble (OTP) read-only memories (EPROM). Or-
ganized into 64K words with 8 bits per word, it
features a fast single address location program-
ming, typically at 75µs per byte. Any byte can
• _{64K×8-bit organization}
• _{Fast read access time: 70ns, 90ns and 120ns}
• _{Fast programming algorithm}
• _{Programming time 75µs typ.}
• _{Two line control (OE & CE)}
• _{Standard product identification code}
• _{Package type}
– _{28-pin DIP/SOP}
– _{32-pin PLCC}
• _{Commercial temperature range}
(0°C to +70°C)
be accessed in less than 70ns/90ns with respect
to Spec. This eliminates the need for WAIT
states in high-performance microprocessor sys-
tems. The HT27C512 has separate Output En-
able (OE) and Chip Enable (CE) controls which
eliminate bus contention issues.
Block Diagram
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6th May ’99