Datasheet Microchip 48L256 — 数据表

48L256
256-Kbit SPI Serial EERAM
Serial SRAM Features
• Unlimited Reads/Unlimited Writes:
-Standard serial SRAM protocol
-Symmetrical timing for reads and writes
• SRAM Array:
-32,768 x 8 bit
• High-Speed SPI Interface:
-Up to 66 MHz
-Schmitt Trigger inputs for noise suppression
• Low-Power CMOS Technology:
-Active current: 5 mA (maximum)
-Standby current: 300 μA (at 85°C maximum)
-Hibernate current: 3 μA (at 85°C maximum) Hidden EEPROM Backup Features
• Cell-Based Nonvolatile Backup:
-Mirrors SRAM array cell-for-cell
-Transfers all data to/from SRAM cells in
parallel (all cells at same time)
• Invisible-to-User Data Transfers:
-VCC level monitored inside device
-SRAM automatically saved on power disrupt
-SRAM automatically restored on VCC return …