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參數(shù)資料
| 型號： | S-35190A-I8T1U |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | HALOGEN FREE AND LEAD FREE, SNT-8 |
| 文件頁數(shù)： | 13/55頁 |
| 文件大小： | 488K |
| 代理商： | S-35190A-I8T1U |
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3-WIRE REAL-TIME CLOCK
S-35190A
Rev.3.0_00
Seiko Instruments Inc.
20
Low Power Supply Voltage Detection Circuit
The S-35190A 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.
VDD
BLD flag
Stop
Sampling pulse
Hysteresis width
0.15 V approximately
BLD flag reading
Detection
voltage
Release
voltage
15.6 ms
1 s
Figure 24 Timing of Low Power Supply Voltage Detection Circuit
Circuits Power-on and Low Power Supply Voltage Detection
Figure 25
shows the changes of the POC flag and BLD flag due to VDD fluctuation.
VDD
BLD flag
Status register 1
reading
POC flag
Low power supply
voltage detection
voltage
Low power supply
voltage detection
voltage
VSS
Figure 25 POC Flag and BLD Flag
相關PDF資料 |
PDF描述 |
|---|---|
| S-35190A-T8T1 | REAL TIME CLOCK, PDSO8 |
| S-35192A-I8T1U | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| S-3530AECA | REAL TIME CLOCK, UUC8 |
| S-3531AECA-TB-01 | REAL TIME CLOCK, UUC8 |
| S-35380A-T8T1G | REAL TIME CLOCK, PDSO8 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S-35190A-J8T1G | 功能描述:實時時鐘 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| S-35190A-J8T1U | 功能描述:IC RTC CLK/CALENDAR SER 8SOP 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:時鐘/日歷 特性:警報器，閏年 存儲容量:- 時間格式:HH：MM：SS（12/24 小時） 日期格式:YY-MM-DD-dd 接口:3 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計時（最大）:8μA ~ 14μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:8-SOP-J 標準包裝:1 |
| S-35190A-T8T1 | 功能描述:實時時鐘 3-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 |
| S-35190A-T8T1G | 功能描述:實時時鐘 3-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 |
| S-35192A | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:3-WIRE REAL-TIME CLOCK |
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