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DS-11802D4-823Y PDF预览

DS-11802D4-823Y

更新时间: 2024-09-13 23:48:39
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描述
Converter

DS-11802D4-823Y 数据手册

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DS1200  
Serial RAM Chip  
www.maxim-ic.com  
FEATURES  
PIN ASSIGNMENT  
C 1024 Bits of Read/Write Memory  
C Low Data Retention Current for Battery  
Backup Applications  
C Four Million Bits/Second Data Rate  
C Single-Byte or Multiple-Byte Data Transfer  
Capability  
C No Restrictions on the Number of Write  
Cycles  
16-Pin SO (300mil)  
C Low-Power CMOS Circuitry  
See Mech. Drawings Section  
APPLICATIONS  
C Software Authorization  
C Computer Identification  
C System Access Control  
C Secure Personnel Areas  
C Calibration  
PIN DESCRIPTION  
VCC  
- +5V  
RST  
- Reset  
C Automatic System Setup  
C Traveling Work Record  
DQ  
- Data Input/Output  
- Clock  
CLK  
GND  
VBAT  
NC  
- Ground  
- Battery (+)  
- No Connection  
DESCRIPTION  
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, RST , and DQ.  
Nonvolatility can be achieved by connecting a battery of 2V to 4V at the battery input VBAT. A load of  
0.5ꢀꢁꢂshould be used to size the external battery for the required data retention time. If nonvolatility is  
not required the VBAT pin should be grounded.  
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