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M28256-90WMS6T Datasheet(PDF) 1 Page - STMicroelectronics |
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M28256-90WMS6T Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 21 page M28256 256 Kbit (32Kb x8) Parallel EEPROM with Software Data Protection PRELIMINARY DATA January 1999 1/21 This is preliminary information on a new product now in developmentor undergoing evaluation . Detail s are subject to change without notice. AI01885 15 A0-A14 W DQ0-DQ7 VCC M28256 G E VSS 8 Figure 1. Logic Diagram 28 1 PDIP28 (BS) PLCC32 (KA) A0-A14 Address Input DQ0-DQ7 Data Input / Output W Write Enable E Chip Enable G Output Enable VCC Supply Voltage VSS Ground Table 1. Signal Names FAST ACCESS TIME: – 90ns at 5V – 120ns at 3V SINGLE SUPPLY VOLTAGE: –5V ± 10% for M28256 – 2.7V to 3.6V for M28256-xxW LOW POWER CONSUMPTION FAST WRITE CYCLE: – 64 Bytes Page Write Operation – Byte or Page Write Cycle ENHANCED END of WRITE DETECTION: – Data Polling – Toggle Bit STATUS REGISTER HIGH RELIABILITY DOUBLE POLYSILICON, CMOS TECHNOLOGY: – Endurance >100,000 Erase/Write Cycles – Data Retention >10 Years JEDEC APPROVED BYTEWIDE PIN OUT ADDRESS and DATA LATCHED ON-CHIP SOFTWARE DATA PROTECTION DESCRIPTION The M28256 and M28256-Ware 32K x8 low power Parallel EEPROM fabricatedwith STMicroelectron- ics proprietary double polysilicon CMOS technol- ogy. TSOP28 (NS) 8 x13.4mm 28 1 SO28 (MS) 300 mils |
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