PDF HT27C020 Data sheet ( Hoja de datos )

Número de pieza	HT27C020
Descripción	OTP CMOS 256Kx 8-Bit EPROM
Fabricantes	Holtek Semiconductor Inc
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No Preview Available ! 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 1 page HT27C020 Programming operation Symbol Parameter tAS tOES tDS tAH tDH tDFP tVPS tPW tVCS tCES tOE tPRT Address Setup Time OE Setup Time Data Setup Time Address Hold Time Data Hold Time Output Enable to Output Float Delay VPP Setup Time PGM Program Pulse Width VCC Setup Time CE Setup Time Data Valid from OE VPP Pulse Rise Time During Programming Test Conditions VCC Conditions 6V — 6V — 6V — 6V — 6V — 6V — 6V — 6V — 6V — 6V — 6V — 6V — Ta=+25°C±5°C Min. Typ. Max. Unit 2 — — µs 2 — — µs 2 — — µs 0 — — µs 2 — — µs 0 — 130 ns 2 — — µs 30 75 105 µs 2 — — µs 2 — — ns — — 150 µs 2 — — µs Test waveforms and measurements For -70, -90, -120 devices: tR, tF< 20ns (10% to 90%) Output test load Note: CL=100pF including jig capacitance, except for the -45 devices, where CL=30pF. 5 10th May ’99 5 Page HT27C020 Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Microelectronics Enterprises Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright © 1999 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 11 10th May ’99 11 Page

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