DS1200
ObsoleteSerial RAM Chip
Overview
- 1024 Bits of Read/Write Memory
- Low Data Retention Current for Battery Backup Applications
- Four Million Bits/Second Data Rate
- Single-Byte or Multiple-Byte Data Transfer Capability
- No Restrictions on the Number of Write Cycles
- Low-Power CMOS Circuitry
The DS1200 serial RAM chip is a miniature read/write memory that can randomly access individual 8-bit strings (bytes) or sequentially access the entire 1024-bit contents (burst). Interface cost to a microprocessor is minimized by on-chip circuitry, which permits data transfers with only three signals: CLK, active-low RST, and DQ.
Nonvolatility can be achieved by connecting a battery of 2V to 4V at the battery input VBAT. A load of 0.5µA should be used to size the external battery for the required data retention time. If nonvolatility is not required the VBAT pin should be grounded.
Applications
- Automatic System Setup
- Calibrators
- Computer Identification
- Secure Personnel Areas
- Software Authorization
- Systems Access Control
- Traveling Work Record
Documentation
Data Sheet 1
This is the most up-to-date revision of the Data Sheet.