参数资料
型号: ISL12027IVZ-T
厂商: Intersil
文件页数: 18/28页
文件大小: 0K
描述: IC RTC/CALENDAR EEPROM 8-TSSOP
产品培训模块: Solutions for Industrial Control Applications
标准包装: 2,500
类型: 时钟/日历
特点: 警报器,闰年,监控器,监视计时器
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: 8-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 8-TSSOP
包装: 带卷 (TR)
25
FN8232.8
August 12, 2010
.
TABLE 10. I2C, LV RESET, AND BATTERY BACKUP OPERATION SUMMARY
(Shaded Row is same as X12028 operation)
MODE
SBIB
BIT
BSW
BIT
VBAT
SWITCHOVER
VOLTAGE
I2C ACTIVE IN
BATTERY
BACKUP?
EE PROM WRITE/
READ IN BATTERY
BACKUP?
FREQ/IRQ
ACTIVE?
NOTES
A
0
Standard Mode,
VTRIP =2.2V
typ
Default for
ISL12027A
NO
N/A
Operation of I2C bus down to VDD =VRESET,
then below that no communications. Battery
switchover at VTRIP.
B
(X12028
mode)
0
1
Legacy Mode,
VDD < VBAT
Default for
ISL12027
YES, only if
VBAT > VRESET
YES
Yes
Operation of I2C bus into battery backup
mode, but only for
VBAT > VDD > VRESET.
Bus must have pull-ups to VBAT. No
non-volatile writes with VBAT > VDD
C
1
0
Standard Mode,
VTRIP =2.2V
typ
NO
YES
Operation of I2C bus down to VDD = VRESET,
then below that no communications. Battery
switchover at VTRIP.
D
1
Legacy Mode,
VDD < VBAT
NO
YES
Operation of I2C busdown to VRESET or
VBAT, whichever is higher.
VRESET (2.63V)
RESET
VTRIP
VDD
tPURST
(2.2V)
IBAT
(BATTERY BACKUP MODE)
(VDD POWER, VBAT NOT CONNECTED)
FIGURE 29. EXAMPLE RESET OPERATION IN MODE A OR C
VBAT (3.0V)
I2C Bus Active
VRESET (2.63V)
RESET
VTRIP
VDD
tPURST
(2.2V)
IBAT
(BATTERY BACKUP MODE)
FIGURE 30. RESET OPERATION IN MODE D
VBAT (3.0V)
I2C BUS ACTIVE
ISL12027, ISL12027A
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