Information

Memory Products
17
EERAM is SRAM with EEPROM backup in a single, low-cost, low-power chip, creating a solution that is more reliable than a
battery-backed SRAM at a lower cost than FRAM.
Key Features
• Serial interface: I
2
C Bus, 1 MHz
• Unlimited E/W cycles on SRAM block
•
Zero write time
•
External auto save trigger
• Data backed up in EEPROM automatically at power down
or Vdd fail
• Data recalled from EEPROM automatically at power-up
• Auto save time < 40 ns (needs external cap)
•
Connect a (~20 μF) capacitor to pin 1
• Low power
•
1 mA/3 mA max. read/write
•
<1 μA standby current
• 8-pin packages (SOIC, PDIP, TSSOP)
• Auto-EEPROM backed—most reliable (no battery needed)
• Single chip to replace RAM, EEPROM and FRAM in
application
• Automotive Grade 1 with PPAP support
Typical Applications
• Metering
• Printers
• Applications needing unlimited writes/endurance
• Applications needing zero wait states
EERAM
4K/16K I
2
C EERAM Products
Product Density Vcc Range Max. Clock Frequency Temperature Ranges Packages
47l04
4 Kbits 2.7–3.6V 1 MHz
−40 to +85°C
−40 to +125°C
PDIP, SOIC, TSSOP
47C04
4 Kbits 4.5–5.5V 1 MHz
−40 to +85°C
−40 to +125°C
PDIP, SOIC, TSSOP
47l16
16 Kbits 2.7–3.6V 1 MHz
−40 to +85°C
−40 to +125°C
PDIP, SOIC, TSSOP
47C16
16 Kbits 4.5–5.5V 1 MHz
−40 to +85°C
−40 to +125°C
PDIP, SOIC, TSSOP
Supply
Monitor
Save Recall
Control
SRAM
Shadow
EEPROM
Data backed in
EEPROM automatically
External
Save Trigger
External
Cap
I
2
C™
Bus
Recall
Save
Unlimited
E/W Cycles
Zero Write Time
SRAM
MCU/
ASIC
I
2
C
Recall
Save
EEPROM
EERAM