DS1221 - Brand New Maxim Integrated Memory Controllers
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Description
The DS1221 is a CMOS circuit designed for converting CMOS RAMs into nonvolatile memories. This Nonvolatile Controller x 4 Chip is capable of monitoring incoming power for an out-of-tolerance condition. It inhibits the chip enable outputs when such a condition is detected to provide write protection and switches on the battery for uninterrupted power supply to the RAMs. In addition, the chip also features an optional security code, which prevents unauthorized access to the memory space. The DS1221 boasts precise voltage detection at extremely low battery consumption through its low-leakage CMOS process. By combining the DS1221 with up to four CMOS memories and lithium batteries, nonvolatile operation can be achieved.
Specifications and Features
- Converts CMOS RAMs into nonvolatile memories
- Data is automatically protected during power loss
- 2-to-4 decoder provides for up to 4 CMOS RAMs
- Provides for redundant batteries
- Test battery condition on power-up
- Full ±10% operating range
- Optional security feature prevents unauthorized access
- 16-pin 0.3-inch DIP saves PC board space
- Optional 16-pin SOIC surface mount package
- Optional industrial temperature range of -40°C to +85°C available
Application Scenarios
The DS1221 can be used in various applications that require converting CMOS RAMs into nonvolatile memories. It can be utilized in electronic devices such as industrial computers, communication systems, and automotive electronics.
Comparison
Advantages- Provides write protection through inhibiting the chip enable outputs upon detection of an out-of-tolerance condition
- Features an optional security code that prevents unauthorized access to the memory space
- Low-leakage CMOS process offers precise voltage detection at extremely low battery consumption
- Provides for redundant batteries and tests battery condition on power-up
Disadvantages- Only supports up to 4 CMOS RAMs through its 2-to-4 decoder
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Datasheet
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Shopping guide
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- Datasheet: Download DS1221
- Chipdatas Part: CD92-DS1221
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/13 05:47 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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