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ST52T440FMPY Datasheet(PDF) 78 Page - STMicroelectronics |
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ST52T440FMPY Datasheet(HTML) 78 Page - STMicroelectronics |
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78 / 94 page  ST52T400/T440/E440/T441 78/94 11.7 Memory Characteristics Subject to general operating conditions for VDD,fosc and TA, unless otherwise specified. Notes: 1. Minimum VDD supply voltage without losing data stored into RAM (in HALT mode or under RESET) or into hardware registers (only in HALT mode). Guaranteed by construction, not tested in production. 2. Data is provided only as a guideline. Table 11.9 RAM and Registers Symbol Parameter Conditions Min. Typ. Max Unit VRM Data retention mode1) HALT mode (or RESET) 1.6 V Table 11.10 EPROM Program Memory Symbol Parameter Conditions Min. Typ. Max Unit WERASE UV lamp Lamp wavelength 2537 A 15 Watt, sec/cm2) tERASE Erase time2) UV lamp is placed 1 inch from the device window without any interposed filters 10 20 min. tRET Data Retention TA =+55 °C 20 years |
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