参数资料
| 型号： | ISL12029IVZ |
| 厂商： | Intersil |
| 文件页数： | 6/29页 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDAR EEPROM 14-TSSOP |
| 标准包装： | 960 |
| 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： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 管件 |
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14
FN6206.10
December 16, 2010
The effective on-chip series load capacitance, CLOAD,
ranges from 4.5pF to 20.25pF with a mid-scale value of
12.5pF (default). CLOAD is changed via two digitally
controlled capacitors, CX1 and CX2, connected from the X1
The effective series load capacitance is the combination of
For example, CLOAD(ATR = 00000) = 12.5pF,
CLOAD(ATR = 100000) = 4.5pF, and CLOAD(ATR = 011111) =
20.25pF. The entire range for the series combination of load
capacitance goes from 4.5pF to 20.25pF in 0.25pF steps. Note
that these are typical values.
DTR Register - DTR2, DTR1, DTR0: Digital
Trimming Register
The digital trimming Bits DTR2, DTR1 and DTR0 adjust the
number of counts per second and average the ppm error to
achieve better accuracy.
DTR2 is a sign bit. DTR2 = 0 means frequency
compensation is > 0. DTR2 = 1 means frequency
compensation is < 0.
DTR1 and DTR0 are scale bits. DTR1 gives 10ppm
adjustment and DTR0 gives 20ppm adjustment.
A range from -30ppm to +30ppm can be represented by
using the three DTR bits.
PWR Register: SBIB, BSW, VTS2, VTS1, VTS0
SBIB: Serial Bus Interface (Enable)
The serial bus can be disabled in battery backup mode by
setting this bit to “1”. This will minimize power drain on the
battery. The Serial Interface can be enabled in battery
backup mode by setting this bit to “0”. (default is “0”). See
BSW: Power Control Bit
The Power Control bit, BSW, determines the conditions for
switching between VDD and Back Up Battery. There are two
options.
Option 1 Standard Mode: Set “BSW = 0” (default for
ISL12029A)
Option 2 Legacy/Default Mode: Set “BSW = 1” (default for
ISL12029)
See “Power Control Operation” on page 16 for more details.
LVR Operation” on page 25 for important details.
VTS2, VTS1, VTS0: VRESET Select Bits
The ISL12029 is shipped with a default VDD threshold
(VRESET) per the ordering information table. This register is
a non-volatile with no protection, therefore any writes to this
location can change the default value from that marked on
the package. If not changed with a non-volatile write, this
value will not change over normal operating and storage
conditions. However, ISL12029 has four (4) additional
selectable levels to fit the customers application. Levels are:
4.64V(default), 4.38V, 3.09V, 2.92V and 2.63V. The VRESET
selection is via 3 bits (VTS2, VTS1 and VTS0) (see Table 6).
Care should be taken when changing the VRESET select bits.
If the VRESET voltage selected is higher than VDD, then the
device will go into RESET and unless VDD is increased, the
device will no longer be able to communicate using the I2C
bus.
TABLE 5. DIGITAL TRIMMING REGISTERS
DTR REGISTER
ESTIMATED FREQUENCY
PPM
DTR2
DTR1
DTR0
00
0
FIGURE 12. DIAGRAM OF ATR
CX1
X1
X2
CRYSTAL
OSCILLATOR
CX2
C
X
16 b5
8b4
4 b3
2b2
1 b1
0.5b0
9
+
+
+
+
+
+
()pF
=
(EQ. 1)
C
LOAD
1
C
X1
-----------
1
C
X2
-----------
+
-----------------------------------
=
C
LOAD
16 b5
8 b4
4 b3
2 b2
1 b1
0.5 b0
9
+
+
+
+
+
+
2
-----------------------------------------------------------------------------------------------------------------------------
pF
=
(EQ. 2)
01
0
+10
00
1
+20
01
1
+30
10
0
11
0
-10
10
1
-20
11
1
-30
TABLE 5. DIGITAL TRIMMING REGISTERS (Continued)
DTR REGISTER
ESTIMATED FREQUENCY
PPM
DTR2
DTR1
DTR0
ISL12029, ISL12029A
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| ISL12029IVZ-T | 功能描述:实时时钟 REAL TIME CLKRTC W/ EPROM IN 14LD T 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 |
| ISL12030 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with 50/60 Cycle AC Input, Alarms and Daylight Savings Correction |
| ISL12030IBZ | 功能描述:实时时钟 REAL TIME CLK W/ EEPROM 8LD 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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