- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97862 > DS1672-3 (DALLAS SEMICONDUCTOR) 0 TIMER(S), REAL TIME CLOCK, PDIP8 PDF資料下載
參數(shù)資料
| 型號： | DS1672-3 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大小： | 104K |
| 代理商： | DS1672-3 |
DS1672
3 of 13
OSCILLATOR CONTROL
The EOSC bit (bit 7 of the control register) controls the oscillator when in back-up mode. This bit when
set to logic 0 will start the oscillator. When this bit is set to a logic 1, the oscillator is stopped and the
DS1672 is placed into a low-power standby mode with a current drain of less than 200 nanoamps when in
back-up mode. When the DS1672 is powered by VCC, the oscillator is always on regardless of the status
of the EOSC bit; however, the counter is incremented only when EOSC is a logic 0.
CRYSTAL SELECTION
A standard 32.768 kHz quartz crystal should be directly connected to the X1 and X2 oscillator pins. The
crystal selected for use should have a specified load capacitance (CL) of 6 pF. For more information on
crystal selection and crystal layout considerations, please consult Application Note 58, “Crystal
Considerations with Dallas Real Time Clocks.”
MICROPROCESSOR MONITOR
A temperature-compensated comparator circuit monitors the level of VCC. When VCC falls to the power-
fail trip point, the RST signal (open drain) is pulled active. When VCC returns to nominal levels, the RST
signal is kept in the active state for 250 ms (typically) to allow the power supply and microprocessor to
stabilize. Note, however, that if the EOSC bit is set to a logic 1 (to disable the oscillator during write
protection), the reset signal will be kept in an active state for 250 ms plus the start-up time of the
oscillator.
TRICKLE CHARGER
The trickle charger is controlled by the trickle charge register. The simplified schematic of Figure 3
shows the basic components of the trickle charger. The trickle charge select (TCS) bit (bits 4-7) controls
the selection of the trickle charger. In order to prevent accidental enabling, only a pattern on 1010 will
enable the trickle charger. All other patterns will disable the trickle charger. The DS1672 powers up
with the trickle charger disabled. The diode select (DS) bits (bits 2-3) select whether or not a diode is
connected between VCC and VBACKUP. If DS is 01, no diode is selected or if DS is 10, a diode is selected.
The RS bits (bits 0-1) select whether a resistor is connected between VCC and VBACKUP and what the value
of the resistor is. The resistor selected by the resistor select (RS) bits and the diode selected by the diode
select (DS) bits are as follows:
TCS
DS
RS
Function
X
XXX
0
XXDisabled
X
XXX
1
XXDisabled
X
XXX
XX0
0
Disabled
1
010
0101
No diode, 100
resistor
1
010
1001
One diode, 100
resistor
1
010
0110
No diode, 2 k
resistor
1
010
1010
One diode, 2 k
resistor
1
010
0111
No diode, 4 k
resistor
1
010
1011
One diode, 4 k
resistor
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1672U-2 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672U-33 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672S-2 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672U-3 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672S-3 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1672-3+ | 功能描述:實時時鐘 I2C 32-Bit Binary Counter RTC 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS167233 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C 32-Bit Binary Counter RTC |
| DS1672-33 | 功能描述:實時時鐘 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1672-33+ | 功能描述:實時時鐘 I2C 32-Bit Binary Counter RTC 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1672S-2 | 功能描述:IC TIMEKEEPER 2V 32-BIT 8-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。