Holtek 27C512 free download

File name 27c512.pdf

HT27C512 CMOS 64Kґ8-Bit OTP 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 · 64Kґ8-bit organization · Fast read access time: 70ns · Fast programming algorithm · Programming time 75ms typ. · Two line control (OE & CE) · Standard product identification code · Commercial temperature range (0°C to +70°C) · 28-pin DIP/SOP, 32-pin PLCC package VCC+1.0V · CMOS and TTL compatible I/O · Low power consumption - Active: 30mA max. - Standby: 1mA typ. General Description The HT27C512 chip family is a low-power, 512K bit, +5V electrically one-time programmable (OTP) read-only memories (EPROM). Organized into 64K 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. This eliminates the need for WAIT states in high-performance microprocessor systems. The HT27C512 has separate Output Enable (OE) and Chip Enable (CE) controls which eliminate bus contention issues. Block Diagram R o w A d d re s s C o lu m n A d d re s s C E O E /V P P 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 C E & O E & P G M & 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. 1.40 1 December 8, 2003 HT27C512 Pin Assignment A 1 5 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 A 1 2 A 7 A 6 A 5 A 4 A 3 A 2 A 1 A 0 D Q 0 D Q 1 D Q 2 V S S 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 V C C A 1 4 A 1 3 A 8 A 9 A 1 1 O E /V P P A 1 0 C E D Q 7 D Q 6 D Q 5 D Q 4 D Q 3 A 6 A 5 A 4 A 3 A 2 A 1 A 0 N C D Q 0 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 8 7 6 5 N C N C V C C A 1 3 A 1 4 V C C A 1 2 N C N C A 1 5 N A 1 A 1 A C 5 2 7 3 0 3 1 3 2 3 0 3 1 3 2 4 3 2 1 4 N C V S S D Q 2 D Q 1 3 2 1 2 9 2 8 2 7 A 8 A 9 A 1 1 N C O E /V P P A 1 0 C E D Q 7 D Q 6 A 7 A 6 A 5 A 4 A 3 A 2 A 1 A 0 D Q 0 9 8 7 6 5 2 9 2 8 2 7 A 1 4 A 1 3 A 8 A 9 A 1 1 O E /V P P A 1 0 C E D Q 7 H T 2 7 C 5 1 2 3 2 P L C C -A 2 6 2 5 2 4 2 3 2 2 2 1 1 0 1 1 1 2 1 3 1 4 H T 2 7 C 5 1 2 3 2 P L C C -B 2 6 2 5 2 4 2 3 2 2 2 1 1 5 1 6 1 7 1 8 1 9 D Q 5 2 0 D Q 6 D Q 4 D Q 3 V S S D Q 2 D Q 1 D Q 5 D Q 4 D Q 3 H T 2 7 C 5 1 2 2 8 D IP -A /S O P -A Pin Description Pin Name A0~A15 DQ0~DQ7 CE OE/VPP NC VCC VSS I/O/P I I/O I I/P ѕ ѕ ѕ Address inputs Data inputs/outputs Chip enable Output enable/program voltage supply No connection Positive power supply Negative power supply, ground Description Absolute Maximum Ratings Operation Temperature Commercial ...0°C to +70°C Storage Temperature...-65°C to 125 °C Applied VCC Voltage with Respect to VSS ...