參數(shù)資料
型號(hào)： S-35390A-J8T1G
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： LEAD FREE, SOP-8
文件頁(yè)數(shù)： 11/56頁(yè)
文件大?。?/td> 529K
代理商： S-35390A-J8T1G
2-WIRE REAL-TIME CLOCK
Rev.3.0_00
S-35390A
Seiko Instruments Inc.
19
Low Power Supply Voltage Detection Circuit
The S-35390A has a low power supply voltage detection circuit, so that users can monitor drops in the power supply
voltage by reading the BLD flag (B1 in the status register 1). There is a hysteresis width of approx. 0.15 V (Typ.) between
detection voltage and release voltage (refer to “
Characteristics (Typical Data)”). The low power supply voltage
detection circuit does the sampling operation only once in one sec for 15.6 ms.
If the power supply voltage decreases to the level of detection voltage (VDET) or less, “1” is set to the BLD flag so that
sampling operation stops. Once “1” is detected in the BLD flag, no sampling operation is performed even if the power
supply voltage increases to the level of release voltage or more, and “1” is held in the BLD flag. After initialization, or once
the BLD flag is read, the BLD flag is automatically set to “0” to restart the sampling operation.
If the BLD flag is “1” even after the power supply voltage is recovered, the internal circuit may be in the indefinite status. In
this case, be sure to initialize the circuit. Without initializing, Read in the next BLD flag is done after sampling, the BLD flag
gets reset to “0”. In this case, be sure to initialize although the BLD flag is in “0” because the internal circuit may be in the
indefinite status.
VDD
BLD flag
Stop
Sampling pulse
Hysteresis width
0.15 V approximately
BLD flag
reading
Detection voltage
1 s
Release voltage
15.6 ms
Figure 22
Timing of Low Power Supply Voltage Detection Circuit
Circuits Power-on and Low Power Supply Voltage Detection
Figure 23 shows the changes of the POC flag and BLD flag due to VDD fluctuation.
VDD
BLD flag
Status register 1
reading
POC flag
VSS
Low power supply
voltage detection
voltage
Low power supply
voltage detection
voltage
Figure 23
POC Flag and BLD Flag
相關(guān)PDF資料
PDF描述
S-35390A-T8T1 REAL TIME CLOCK, PDSO8
S-35392A-I8T1U 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35399A03-J8T2U 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35399A03-J8T2G 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35L32AEFSG REAL TIME CLOCK, PDSO10
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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S-35390A-T8T1 功能描述:實(shí)時(shí)時(shí)鐘 2-Wire 1.3-5.5V 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(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
S-35390A-T8T1G 功能描述:實(shí)時(shí)時(shí)鐘 2-Wire 1.3-5.5V 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(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
S-35390A-T8T1U 功能描述:IC RTC CLK/CALENDAR I2C 8TSSOP 制造商:ablic u.s.a. inc. 系列:- 零件狀態(tài):在售 類型:時(shí)鐘/日歷 特性:警報(bào)器，閏年 存儲(chǔ)容量:- 時(shí)間格式:HH：MM：SS（12/24 小時(shí)） 日期格式:YY-MM-DD-dd 接口:I2C，2 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計(jì)時(shí)（最大）:14μA ~ 30μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商器件封裝:8-TSSOP 標(biāo)準(zhǔn)包裝:1
S-35391A-I8T1U 功能描述:IC RTC CLK/CALENDAR I2C SNT-8A 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:時(shí)鐘/日歷 特性:警報(bào)器，閏年 存儲(chǔ)容量:- 時(shí)間格式:HH：MM：SS（12/24 小時(shí)） 日期格式:YY-MM-DD-dd 接口:I2C，2 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計(jì)時(shí)（最大）:14μA ~ 30μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SMD，扁平引線 供應(yīng)商器件封裝:SNT-8A 標(biāo)準(zhǔn)包裝:1
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