48L256

256-Kbit SPI Serial EERAM 48L256 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 100,000 Backups Minimum (at 85°C) 100 Years Retention (at 55°C) Other Features of the 48L256 Operating Voltage Range: 2.7V-3.6V Temperature Ranges: - Industrial (I): -40°C to +85°C ESD Protection: >2,000V Packages 8-Lead SOIC Package Types (not to scale) 8-Lead SOIC (Top View) CS SO VCAP VSS 1 2 3 4 8 VCC 7 HOLD 6 SCK 5 SI Pin Function Table Name Function CS Chip Select Input SO Serial Data Output VCAP VSS SI SCK HOLD External Capacitor Ground Serial Data Input Serial Clock Input Hold Input VCC Supply Voltage  2019 Microchip Technology Inc. Preliminary DS20006237B-page 1 General Description The Microchip Technology Inc. 48L256 serial EERAM has an SRAM memory core with hidden EEPROM backup. ...