Holtek Semiconductor HT27C040
The HT27C040 chip family is a low-power, 4096K (4,194,304) bits, +5V electrically one-time programmable (OTP) read-only memories (EPROM). This eliminates the need for WAIT states in high-performance microprocessor systems. The HT27C040 has separate Output Enable (OE) and Chip Enable (CE) controls which eliminate bus contention issues.| Part No. | HT27C040 |
|---|---|
| Datasheet | HT27C040 Download |
| Manufacturer |  Holtek Semiconductor |
| Description | CMOS 512K x 8-Bit OTP EPROM |
| Buy | Stock & Price |
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
● 512K´8-bits organization
● Fast read access time: 70ns
● Fast programming algorithm
● Programming time 75ms typ.
● Two line controls (OE and CE)
● Standard product identification code
● Commercial temperature range (0°C to +70°C)
● 32-pin DIP/SOP/PLCC package VCC+1.0V
● CMOS and TTL compatible I/O
● Low power consumption - Active: 30mA max. - Standby: 1mA typ.
GENERAL DESCRIPTION
Organized into 512K 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 70ns with respect to Spec. Block Diagram R o w A d d re s s C o lu m n A d d re s s X -D e c o d e r C e ll A r r a y V C C Y -D e c o d e r Y - G a tin g V S S V P P C E O E C E & O E & T E S T C o n tr o l L o g ic S A C K T & O u tp u t B u ffe r D Q 0 ~ D Q 7 Rev. 1.00 1...
