参数资料
| 型号： | ISL12022MIBZ-T7A |
| 厂商： | Intersil |
| 文件页数： | 2/31页 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDAR TEMP SNSR 20SOIC |
| 应用说明： | Addressing Power Issues in Real Time Clock Appls |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 250 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，夏令时，闰年，SRAM |
| 存储容量： | 128B |
| 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： | 2.7 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 带卷 (TR) |
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ISL12022M
10
FN6668.9
June 20, 2012
General Description
The ISL12022M device is a low power real time clock (RTC) with
embedded temperature sensor and crystal. It contains crystal
frequency compensation circuitry over the operating temperature
range good to ±5ppm accuracy. It also contains a clock/calendar
with Daylight Savings Time (DST) adjustment, power fail and low
battery monitors, brownout indicator, 1 periodic or polled alarm,
intelligent battery backup switching and 128 Bytes of battery-
backed user SRAM.
The oscillator uses an internal 32.768kHz crystal. The real time
clock tracks time with separate registers for hours, minutes and
seconds. The device has calendar registers for date, month, year
and day of the week. The calendar is accurate through 2099,
with automatic leap year correction. In addition, the ISL12022M
can be programmed for automatic Daylight Saving Time (DST)
adjustment by entering local DST information.
The ISL12022M’s alarm can be set to any clock/calendar value
for a match. For example, every minute, every Tuesday or at 5:23
AM on March 21. The alarm status is available by checking the
Status Register, or the device can be configured to provide a
hardware interrupt via the IRQ/FOUT pin. There is a repeat mode for
the alarm allowing a periodic interrupt every minute, every hour,
every day, etc.
The device also offers a backup power input pin. This VBAT pin
allows the device to be backed up by battery or supercapacitor
with automatic switchover from VDD to VBAT. The ISL12022M
device is specified for VDD = 2.7V to 5.5V and the clock/calendar
portion of the device remains fully operational in battery backup
mode down to 1.8V (Standby Mode). The VBAT level is monitored
and reported against preselected levels. The first report is
registered when the VBAT level falls below 85% of nominal level;
the second level is set for 75%. Battery levels are stored in
PWR_VBAT registers.
The ISL12022M offers a “Brownout” alarm once the VDD falls
below a pre-selected trip level. This allows system Micro to save
vital information to memory before complete power loss. There are
six VDD levels that could be selected for initiation of the Brownout
alarm.
FIGURE 10. IDD vs TEMPERATURE, 3 DIFFERENT FOUT
FIGURE 11. IBAT WITH TSE = 1, BTSE = 1 vs TEMPERATURE
FIGURE 12. IDD WITH TSE = 1 vs TEMPERATURE
FIGURE 13. OSCILLATOR CHANGE vs TEMPERATURE AT
DIFFERENT AGING SETTINGS (IATR) (BETA SET FOR
1ppm STEPS)
Typical Performance Curves Temperature is +25°C unless otherwise specified. (Continued)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-20
0
204060
80
TEMPERATURE (°C)
SUPPL
Y
CURR
E
N
T
(A)
FOUT = 32kHz
FOUT = 64Hz
FOUT = 1Hz
20
30
40
50
60
70
80
90
100
110
-40
-20
0
20
406080
TEMPERATURE (°C)
I BA
T
(
A
)
VDD = 1.8V
VBAT = 5.5V
VDD = 3.0V
40
50
60
70
80
90
100
110
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
I DD
(
A
)
VDD = 2.7V
VBAT = 5.5V
VDD = 3.3V
-80
-60
-40
-20
0
20
40
60
80
-40
-20
0
2040
6080
TEMPERATURE (°C)
FREQUENCY
CHANGE
(ppm
)
62.5ppm
32ppm
-31ppm
-61.5ppm
0ppm
相关PDF资料 |
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相关代理商/技术参数 |
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| ISL12022MIBZ-TR5421 | 功能描述:实时时钟 REAL TIME CLK W/MFK IMPROVED ESD AIR 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 |
| ISL12022MR5421 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated 5ppm |
| ISL12022M-R5421 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Accuracy RTC Modules, Feature-Rich RTCs |
| ISL12023 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Daylight Saving |
| ISL12023IVZ | 功能描述:实时时钟 REAL TIME CLK/CLNDR W/TEMP COM 14 L 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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