256-Kbit SPI Serial EERAM
256-Kbit SPI Serial EERAM
48L256
Serial SRAM Features
• Unlimited Reads/Unlimited Writes: - Standard serial SRAM proto...
Description
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. ...
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