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CAT28C256NI-12T 데이터시트(PDF) 1 Page - Catalyst Semiconductor |
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CAT28C256NI-12T 데이터시트(HTML) 1 Page - Catalyst Semiconductor |
1 / 10 page 1 CAT28C256 32K-Bit Parallel E2PROM FEATURES s Fast Read Access Times: 120/150ns s Low Power CMOS Dissipation: –Active: 25 mA Max. –Standby: 150 µA Max. s Simple Write Operation: –On-Chip Address and Data Latches –Self-Timed Write Cycle with Auto-Clear s Fast Write Cycle Time: –5ms Max s CMOS and TTL Compatible I/O s Hardware and Software Write Protection s Automatic Page Write Operation: –1 to 64 Bytes in 5ms –Page Load Timer s End of Write Detection: –Toggle Bit –DATA Polling s 100,000 Program/Erase Cycles s 100 Year Data Retention s Commerical, Industrial and Automotive Temperature Ranges DESCRIPTION The CAT28C256 is a fast, low power, 5V-only CMOS parallel E2PROM 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 5096 FHD F02 © 1998 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 E2PROM ARRAY 64 BYTE PAGE REGISTER VCC DATA POLLING AND TOGGLE BIT Doc. No. 25020-0A 2/98 |
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