HT27C020 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT27C020 Datasheet PDF : 11 Pages
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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
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