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参数资料
| 型号： | M41T56C64MY6F |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO18 |
| 封装： | 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOX-18 |
| 文件页数： | 15/19页 |
| 文件大小： | 181K |
| 代理商： | M41T56C64MY6F |
Obsolete
Product(s)
- Obsolete
Product(s)
M41T56C64
Summary description
1
Summary description
The M41T56C64 is a low power, Serial Real Time Clock with 56 bytes of NVRAM plus a
64Kb EEPROM (see Figure 3). A built-in 32,768Hz oscillator (crystal controlled) and the first
8 bytes of the RAM are used for the clock/calendar function and are configured in binary
coded decimal (BCD) format. Addresses and data are transferred serially via a two-line, bi-
directional bus. The built-in address register is incremented automatically after each WRITE
or READ data byte.
The M41T56C64 clock has a built-in power sense circuit which detects power failures and
automatically switches to the battery supply during power failures. The energy needed to
sustain the RAM and clock operations can be supplied from a small lithium coin cell.
Typical data retention time for the Serial RTC is in excess of 10 years with a 50mAh, 3V
lithium cell. The M41T56C64 is supplied in an 18-lead Plastic SOIC package.
1.1
Calibration
As the crystal is molded together with the silicon in this package, ST can program the
appropriate calibration value necessary to achieve ±5 ppm accuracy at 25°C after two SMT
reflows (see Figure 4). This calibration value will be written into address 1550h of
the EEPROM. This clock accuracy can then be guaranteed to drift no more than ±3 ppm the
first year, and ±1 ppm for each following year due to crystal aging.
Figure 1.
Logic diagram
1.
Open drain output
AI09123
VCC
M41T56
+
M24C64
(EEPROM)
VSS
SCL
E0
E1
E2
WC
SDA
FT/OUT
(1)
VBAT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M41T56M | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:512 bit 64b x8 Serial Access TIMEKEEPER SRAM |
| M41T56M6 | 功能描述:实时时钟 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41T56M6E | 功能描述:实时时钟 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41T56M6F | 功能描述:实时时钟 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41T56M6TR | 功能描述:实时时钟 Serial RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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