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CAT28C256PI-15T 데이터시트(PDF) 1 Page - Catalyst Semiconductor |
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CAT28C256PI-15T 데이터시트(HTML) 1 Page - Catalyst Semiconductor |
1 / 12 page 1 CAT28C256 256K-Bit Parallel EEPROM FEATURES ■ Fast read access times: 120/150ns ■ Low power CMOS dissipation: –Active: 25 mA max –Standby: 150 µA max ■ Simple write operation: –On-chip address and data latches –Self-timed write cycle with auto-clear ■ Fast write cycle time: –5ms max ■ CMOS and TTL compatible I/O ■ Hardware and software write protection ■ Automatic page write operation: –1 to 64 bytes in 5ms –Page load timer ■ End of write detection: –Toggle bit – DATA DATA DATA DATA DATA polling ■ 100,000 program/erase cycles ■ 100 year data retention ■ Commerical, industrial and automotive temperature ranges DESCRIPTION The CAT28C256 is a fast, low power, 5V-only CMOS parallel EEPROM organized as 32K x 8-bits. It requires a simple interface for in-system programming. On-chip address and data latches, self-timed write cycle with auto- clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bits signal the start and end of the self- timed write cycle. Additionally, the CAT28C256 features hardware and software write protection. The CAT28C256 is manufactured using Catalyst’s ad- vanced CMOS floating gate technology. It is designed to endure 100,000 program/erase cycles and has a data retention of 100 years. The device is available in JEDEC approved 28-pin DIP, 28-pin TSOP or 32-pin PLCC packages. BLOCK DIAGRAM © 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice ADDR. BUFFER & LATCHES ADDR. BUFFER & LATCHES INADVERTENT WRITE PROTECTION CONTROL LOGIC TIMER ROW DECODER COLUMN DECODER HIGH VOLTAGE GENERATOR A6–A14 CE OE WE A0–A5 I/O0–I/O7 I/O BUFFERS 32,768 x 8 EEPROM ARRAY 64 BYTE PAGE REGISTER VCC DATA POLLING AND TOGGLE BIT Doc. No. 1004, Rev. D ALO GEN FR TM LEAD FREE |
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