參數(shù)資料
| 型號： | ISL12022MIBZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 1/31頁 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDAR TEMP SNSR 20SOIC |
| 應用說明： | Addressing Power Issues in Real Time Clock Appls |
| 產品培訓模塊： | Solutions for Industrial Control Applications |
| 標準包裝： | 760 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，夏令時，閏年，SRAM |
| 存儲容量： | 128B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 電壓 - 電源，電池： | 1.8 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC W |
| 包裝： | 管件 |
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1
Low Power RTC with Battery Backed SRAM, Integrated
±5ppm Temperature Compensation and Auto Daylight
Saving
ISL12022M
The ISL12022M device is a low power real time clock (RTC) with
an embedded temperature sensor and crystal. Device functions
include oscillator compensation, clock/calendar, power fail and
low battery monitors, brownout indicator, one-time, periodic or
polled alarms, intelligent battery backup switching, Battery
Reseal function and 128 bytes of battery-backed user SRAM.
Backup battery current draw is less than 1.6A over the
temperature range. The device is offered in a 20 Ld SOIC module
that contains the RTC and an embedded 32.768kHz quartz
crystal. The calibrated oscillator provides less than ±5ppm drift
over the full -40°C to +85°C temperature range.
The RTC tracks time with separate registers for hours, minutes,
and seconds. The calendar registers track date, month, year and
day of the week and are accurate through 2099, with automatic
leap year correction.
Daylight Savings time adjustment is done automatically, using
parameters entered by the user. Power fail and battery monitors
offer user-selectable trip levels. The time stamp function records
the time and date of switchover from VDD to VBAT power, and
also from VBAT to VDD power.
See AN1549 “Addressing Power Issues in Real Time Clock
Applications”
Features
Embedded 32.768kHz Quartz Crystal in the Package
20 Ld SOIC Package (for DFN version, refer to the ISL12020M)
Calendar
On-chip Oscillator Temperature Compensation
10-bit Digital Temperature Sensor Output
15 Selectable Frequency Outputs
Interrupt for Alarm or 15 Selectable Frequency Outputs
Automatic Backup to Battery or Supercapacitor
VDD and Battery Status Monitors
Battery Reseal Function to Extend Battery Shelf Life
Power Status Brownout Monitor
Time Stamp for Battery Switchover
128 Bytes Battery-Backed User SRAM
1.6A Max Battery Current
I2C-Bus
RoHS Compliant
Applications
Utility Meters
POS Equipment
Printers and Copiers
Digital Cameras
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FIGURE 2. OSCILLATOR ERROR vs TEMPERATURE
NC
1
NC
2
NC
3
NC
4
NC
5
GND
6
VBAT
7
GND
8
NC
9
NC
10
SDA
11
SCL
12
IRQ/ 13
VDD 14
ISL12022M
GND 15
NC
16
NC
17
NC
18
NC 19
NC 20
3.3V
R1
10k
R2
10k
R3
10k
C1
0.1F
BAT54
SDA
SCL MCU
GND
INTERFACE
VDD
BATTERY
3.0V
C2
0.1F
SCHOTTKY DIODE
IRQ/FOUT
FOUT
-5
-4
-3
-2
-1
0
1
2
3
4
5
-40
-20
0
20406080
TEMPERATURE (°C)
F
OU
T
FREQUENCY
ERROR
(pp
m
)
VDD = 2.7V
VBAT = 5.5V
VDD = 3.3V
June 20, 2012
FN6668.9
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas Inc. 2008-2012. All Rights Reserved
Intersil (and design) and Battery Reseal are trademarks owned by Intersil Corporation or one of its subsidiaries. I2C Bus is a trademark
owned by NXP Semiconductors Netherlands, B.V. All other trademarks mentioned are the property of their respective owners.
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