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参数资料
| 型号： | DS1216B |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC SMARTWATCH RAM 16K/64K 28DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 13 |
| 控制器类型： | Smartwatch RAM |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 28-DIP（0.600"，15.24mm）插口 |
| 供应商设备封装： | 28-DIP 插口 |
| 包装： | 管件 |
DS1216 SmartWatch RAM/SmartWatch ROM
5 of 15
Figure 1. SmartWatch Comparison Register Definition
NONVOLATILE CONTROLLER OPERATION
The DS1216 SmartWatch performs circuit functions required to make a CMOS RAM nonvolatile. First, a
switch is provided to direct power from the battery or VCC supply, depending on which voltage is greater.
This switch has a voltage drop of less than 0.2V. The second function that the SmartWatch provides is
power-fail detection, which occurs at VTP. The DS1216 constantly monitors the VCC supply. When VCC
goes out of tolerance, a comparator outputs a power-fail signal to the chip-enable logic. The third function
accomplishes write protection by holding the chip-enable signal to the memory within 0.2V of VCC or
battery. During nominal power-supply conditions, the memory chip-enable signal will track the chip-
enable signal sent to the socket with a maximum propagation delay of 6ns.
FRESHNESS SEAL
Each DS1216 is shipped from Maxim with its lithium energy source disconnected, ensuring full energy
capacity. When VCC is first applied at a level greater than the lithium energy source is enabled for battery-
backup operation.
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
BYTE 0
BYTE 1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
BYTE 6
BYTE 7
C5
3A
A3
5C
C5
3A
A3
5C
HEX
VALUE
7
0
NOTE: THE PATTERN RECOGNITION IN HEX IS C5, 3A, 5C, C5, 3A, A3, 5C. THE ODDS OF THIS PATTERN
ACCIDENTALLY DUPLICATING AND CAUSING INADVERTENT ENTRY TO THE SMARTWATCH ARE LESS
THAN 1 IN 1019. THIS PATTERN IS SENT TO THE SMARTWATCH LSB TO MSB.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1216C | 功能描述:存储器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
| DS1216D | 功能描述:存储器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
| DS1216E | 功能描述:存储器控制器 SmartWatch ROM RoHS:否 制造商:Maxim Integrated |
| DS1216F | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| DS1216F-3 | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
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