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参数资料
| 型号： | DS1216E |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, DIP28 |
| 封装： | 0.600 INCH, SOCKET, DIP-28 |
| 文件页数： | 10/14页 |
| 文件大小： | 441K |
| 代理商： | DS1216E |
DS1216 SmartWatch RAM/SmartWatch ROM
5 of 14
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 7ns for the 5V and 12ns for the
3.3V version.
FRESHNESS SEAL
Each DS1216 is shipped from Dallas Semiconductor 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.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1225Y-200 | 8K X 8 NON-VOLATILE SRAM MODULE, 200 ns, PDIP28 |
| DS1230AB-120 | 32K X 8 NON-VOLATILE SRAM MODULE, 120 ns, DMA28 |
| DS1230AB-150 | 32K X 8 NON-VOLATILE SRAM MODULE, 150 ns, DMA28 |
| DS1230AB-100 | 32K X 8 NON-VOLATILE SRAM MODULE, 100 ns, DMA28 |
| DS1230ABP-70 | 32K X 8 NON-VOLATILE SRAM MODULE, 70 ns, DMA34 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| DS1216H | 功能描述:存储器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
| DS1216MP000 | 制造商:Thomas & Betts 功能描述:100A,PLG,2P3W,MG,216,208V |
| DS1216MR000 | 制造商:Thomas & Betts 功能描述:100A,NLT,2P3W,MG,216,208V |
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