參數(shù)資料
型號(hào)： DS1306N
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Timer or RTC
英文描述： 0 TIMER(S), REAL TIME CLOCK, PDIP16
封裝： 0.300 INCH, DIP-16
文件頁(yè)數(shù)： 15/17頁(yè)
文件大?。?/td> 252K
代理商： DS1306N
DS1306
7 of 17
TRICKLE CHARGER RESISTOR SELECT Table 2
RS BITS
RESISTOR
TYPICAL VALUE
00
None
01
R1
2 k
10
R2
4 k
11
R3
8 k
If RS is 00, the trickle charger is disabled independently of TCS.
Diode and resistor selection is determined by the user according to the maximum current desired for
battery or super cap charging. The maximum charging current can be calculated as illustrated in the
following example. Assume that a system power supply of 5-volts is applied to VCC1 and a super cap is
connected to VCC2. Also assume that the trickle charger has been enabled with one diode and resister R1
between VCC1 and VCC2. The maximum current I MAX would therefore be calculated as follows:
IMAX
= (5.0V - diode drop)/R1
~ (5.0V - 0.7V)/2 k
~ 2.2 mA
Obviously, as the super cap charges, the voltage drop between VCC1 and VCC2 will decrease and therefore
the charge current will decrease.
POWER CONTROL
Power is provided through the VCC1, VCC2, and VBAT pins. Three different power supply configurations
are illustrated in Figure 4. Configuration 1 shows the DS1306 being backed up by a non-rechargeable
energy source such as a lithium battery. In this configuration, the system power supply is connected to
VCC1 and VCC2 is grounded. When VCC falls below VBAT the device switches into a low current battery
backup mode.
Upon power up, the device switches from VBAT to VCC when VCC is greater than
VBAT + 0.2V. The device is write protected whenever it is switched to VBAT.
Configuration 2 illustrates the DS1306 being backed up by a rechargeable energy source. In this case, the
VBAT pin is grounded, VCC1 is connected to the primary power supply, and VCC2 is connected to the
secondary supply (the rechargeable energy source). The DS1306 will operate from the larger of VCC1 or
VCC2. When VCC1 is greater than VCC2 + 0.2 volt (typical), VCC1 will power the DS1306. When VCC1 is
less than VCC2, VCC2 will power the DS1306.
The DS1306 does not write-protect itself in this
configuration.
Configuration 3 shows the DS1306 in battery operate mode where the device is powered only by a single
battery. In this case, the VCC1 and VBAT pins are grounded and the battery is connected to the VCC2 pin.
Only these three configurations are allowed. Unused supply pins must be grounded.
相關(guān)PDF資料
PDF描述
DS1306 0 TIMER(S), REAL TIME CLOCK, PDIP16
DS1306E 0 TIMER(S), REAL TIME CLOCK, PDSO20
DS1306EN 0 TIMER(S), REAL TIME CLOCK, PDSO20
DS1307Z 1 TIMER(S), REAL TIME CLOCK, PDSO8
DS1307N 1 TIMER(S), REAL TIME CLOCK, PDIP8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1306N+ 功能描述:實(shí)時(shí)時(shí)鐘 Serial Alarm RTC 3-Wire RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1306ZN 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Serial Alarm Real-Time Clock(266.05 k)
DS1307 功能描述:實(shí)時(shí)時(shí)鐘 64x8 Serial I2C RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1307_06 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:64 x 8, Serial, I2C Real-Time Clock
DS1307+ 功能描述:實(shí)時(shí)時(shí)鐘 64x8 Serial I2C RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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