- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9378 > ISL12028IBZ-T (Intersil)IC RTC EEPROM LP 14-SOIC PDF資料下載
參數(shù)資料
| 型號： | ISL12028IBZ-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 29/29頁 |
| 文件大小： | 0K |
| 描述： | IC RTC EEPROM LP 14-SOIC |
| 產(chǎn)品培訓模塊： | Solutions for Industrial Control Applications |
| 標準包裝： | 1 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，監(jiān)控器，監(jiān)視計時器 |
| 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： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 14-SOICN |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | ISL12028IBZ-TCT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁當前第29頁
9
FN8233.9
November 30, 2010
Description
The ISL12028 device is a Real Time Clock with clock/calendar,
two polled alarms with integrated 512x8-bit EEPROM, oscillator
compensation, CPU Supervisor (Power-On-Reset, Low
Voltage Sensing and Watchdog Timer) and battery backup
switch.
The oscillator uses an external, low-cost 32.768kHz crystal.
All compensation and trim components are integrated on the
chip. This eliminates several external discrete components
and a trim capacitor, saving board area and component cost.
The Real-Time Clock keeps track of time with separate
registers for Hours, Minutes and Seconds. The Calendar has
separate registers for Date, Month, Year and Day-of-week.
The calendar is correct through 2099, with automatic leap
year correction.
The Dual Alarms can be set to any Clock/Calendar value for a
match. For instance, every minute, every Tuesday, or 5:23 AM
on March 21. The alarms can be polled in the Status Register
or can provide a hardware interrupt (IRQ/FOUT pin). There is a
repeat mode for the alarms allowing a periodic interrupt.
The IRQ/FOUT pin may be software selected to provide a
frequency output of 1Hz, 4096Hz, or 32,768Hz or inactive.
The ISL12028 device integrates CPU Supervisory functions
(POR, WDT) and Battery Switch. There is Power-On-Reset
(RESET) output with 250ms delay from power on when the
VDD supply crosses the VRESET threshold for the device. It
will also assert RESET when VDD goes below the specified
VRESET threshold for the device. The VRESET threshold is
selectable via VTS2/VTS1/VTS0 registers to five (5)
pre-selected levels. There is Watchdog Timer (WDT) with 3
selectable time-out periods (0.25s, 0.75s and 1.75s) and
disabled setting. The Watchdog Timer activates the RESET
pin when it expires. Normally, the I2C Interface is disabled
when the RESET output is active, but this can be changed
by using a register bit to enable I2C operation in battery
backup mode.
The device offers a backup power input pin. This VBAT pin
allows the device to be backed up by battery or SuperCap.
The entire ISL12028 device is fully operational from 2.7 to
5.5V and the clock/calendar portion of the ISL12028 device
remains fully operational down to 1.8V (Standby Mode).
The ISL12028 device provides 4k bits of EEPROM with 8
modes of BlockLock control. The Block Lock allows a
safe, secure memory for critical user and configuration data,
while allowing a large user storage area.
Pin Descriptions
Serial Clock (SCL)
The SCL input is used to clock all data into and out of the
device. The input buffer on this pin is always active (not
gated). The pull-up resistor on this pin must use the same
voltage source as VDD.
Serial Data (SDA)
SDA is a bidirectional pin used to transfer data into and out
of the device. It has an open drain output and may be wire
ORed with other open drain or open collector outputs. The
input buffer is always active (not gated).
This open drain output requires the use of a pull-up resistor.
The pull-up resistor on this pin must use the same voltage
source as VDD. The output circuitry controls the fall time of
the output signal with the use of a slope controlled
pull-down. The circuit is designed for 400kHz I2C interface
speed.
VBAT
This input provides a backup supply voltage to the device.
VBAT supplies power to the device in the event the VDD
supply fails. This pin can be connected to a battery, a
SuperCap or tied to ground if not used.
Note that the device is not guaranteed to operate with
VBAT < 1.8V. If the battery voltage is expected to drop lower
than this minimum, correct operation of the device,
(especially after a VDD power-down cycle) is not
guaranteed.
IRQ/FOUT (Interrupt Output/Frequency Output)
This dual function pin can be used as an interrupt or
frequency output pin. The IRQ/FOUT mode is selected via
the frequency out control bits of the control/status register. It
has a CMOS push-pull output and can be used to clock
other devices and maintain low power dissipation.
Interrupt Mode. The pin provides an interrupt signal
output. This signal notifies a host processor that an alarm
has occurred and requests action.
Frequency Output Mode. The pin outputs a clock signal,
which is related to the crystal frequency. The frequency
output is user selectable and enabled via the I2C.
RESET
The RESET signal output can be used to notify a host
processor that the Watchdog timer has expired or the VDD
voltage supply has dipped below the VRESET threshold. It is
an open drain, active LOW output. Recommended value for
the pull-up resistor is 5k
Ω. If unused, it can be tied to ground.
In battery mode, the Watchdog timer function is disabled.
The RESET signal output is asserted LOW when the VDD
voltage supply has dipped below the VRESET threshold but
the RESET signal output will not return HIGH until the device
is back to VDD mode (out of Batttery Backup mode) even if
the VDD voltage is above VRESET threshold.
X1, X2
The X1 and X2 pins are the input and output, respectively, of
an inverting amplifier. An external 32.768kHz quartz crystal is
ISL12028, ISL12028A
相關PDF資料 |
PDF描述 |
|---|---|
| VI-2NP-MW | CONVERTER MOD DC/DC 13.8V 100W |
| AD5112BCPZ5-500R7 | IC DGTL POT 64POS 5K 8LFCSP |
| ISL12029IB27Z-T | IC RTC EEPROM LP 2.63V 14-SOIC |
| VI-2NN-MX-B1 | CONVERTER MOD DC/DC 18.5V 75W |
| VI-2NN-MW | CONVERTER MOD DC/DC 18.5V 100W |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL12028IV27AZ | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 92VSET 14 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12028IV27AZ-T | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 92VSET 14 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12028IV27Z | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 7VSET 14 L RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12028IV27Z-T | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 7VSET 14 L RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12028IV30AZ | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 3 09VSET 14 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。