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| 型号： | DS3231M+TRL |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/20页 |
| 文件大小： | 0K |
| 描述： | IC REAL TIME CLOCK I2C 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.3 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
| 其它名称： | 90-3231M+NTR |
±5ppm, I2C Real-Time Clock
9
Maxim Integrated
DS3231M
High-Accuracy Time Base
The temperature sensor, oscillator, and digital adjust-
ment controller logic form the highly accurate time base.
The controller reads the output of the on-board tempera-
ture sensor and adjusts the final 1Hz output to maintain
the required accuracy. The device is trimmed at the
factory to maintain a tight accuracy over the operating
temperature range. When the device is powered by VCC,
the adjustment occurs once a second. When the device
is powered by VBAT, the adjustment occurs once every
10s to conserve power. Adjusting the 1Hz time base less
often does not affect the device’s long-term timekeeping
accuracy. The device also contains an Aging Offset reg-
ister that allows a constant offset (positive or negative) to
be added to the factory-trimmed adjustment value.
Power-Supply Configurations
The DS3231M can be configured to operate on a single
power supply (using either VCC or VBAT) or in a dual-
supply configuration, which provides a backup supply
source to keep the timekeeping circuits alive during
absence of primary system power.
Figure 4 illustrates a single-supply configuration using
VCC only, with the VBAT input grounded. When VCC < VPF,
the RST output is asserted (active low). Temperature
conversions are executed once per second.
Figure 5 illustrates a single-supply configuration using
VBAT only, with the VCC input grounded. The RST output
is disabled and is held at ground through the connection
of the internal pullup resistor. Temperature conversions
are executed once every 10s.
Figure 6 illustrates a dual-supply configuration, using
the VCC supply for normal system operation and the
VBAT supply for backup power. In this configuration, the
power-selection function is provided by a temperature-
compensated voltage reference and a comparator circuit
that monitors the VCC level. When VCC is greater than
VPF, the device is powered by VCC. When VCC is less
than VPF but greater than VBAT, the device is powered
Figure 4. Single Supply (VCC Only)
Figure 5. Single Supply (VBAT Only)
Figure 6. Dual Power Supply
Table 1. Power Control
VBAT
VCC
+3.3V
VBAT
VCC
VBAT
VCC
+3.3V
CONFIGURATION
CONDITION
I/O ACTIVE
I/O INACTIVE
RST
VCC Only
(Figure 4)
VCC > VPF
ICCA
ICCS
Inactive (High)
VCC < VPF
Active (Low)
VBAT Only
(Figure 5)
EOSC = 0
IBATA
IBATT
Disabled (Low)
EOSC = 1
IBATDR
Dual Supply
(Figure 6)
VCC > VPF
ICCA
ICCS
Inactive (High)
VCC < VPF
VCC > VBAT
ICCA
VCC > VBAT
ICCS
Active (Low)
VCC < VBAT
IBATA
VCC < VBAT
IBATT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3231MZ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:5ppm, I2C Real-Time Clock Battery Backup for Continuous Timekeeping |
| DS3231MZ/V+ | 功能描述:实时时钟 TRC/TCMO MEMS 8L 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 |
| DS3231MZ/V+T | 功能描述:实时时钟 TRC/TCMO MEMS 8L 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 |
| DS3231MZ+ | 功能描述:实时时钟 5+/-ppm 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 |
| DS3231MZ+TRL | 功能描述:实时时钟 5+/-ppm 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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