參數(shù)資料
型號(hào)： S-3511AEFS-TB
元件分類： XO, clock
英文描述： REAL TIME CLOCK, PDSO8
封裝： 0.65 MM PITCH, SSOP-8
文件頁(yè)數(shù)： 14/36頁(yè)
文件大?。?/td> 404K
代理商： S-3511AEFS-TB
REAL-TIME CLOCK
Rev. 1.4_00
S-3511A
Seiko Instruments Inc.
21
6. Power voltage detecting circuit
S-3511A has an internal power voltage detecting circuit. This circuit gives sampling movement for only
15.6 ms once a second. If the power voltage decreases below the detection voltage (VDET), the BLD latch
circuit latches the “H” level, and sampling movement stops. Only when subsequent communication is of
the status read command, the output of the latch circuit is transferred to the sift register and the sampling
movement is resumed. Decrease in power voltage can be monitored by reading the POWER flag. That is
to say, once decrease in power voltage is detected, any detecting operation is not performed and "H" is
held unless you perform initialization or send the status read command.
Caution When power voltage is increased and the first read operation is performed after decrease
in power voltage occurs and the latch circuit latches "H", "1" can be read on the POWER
flag. However, if the next read operation is performed after the sampling of the detecting
circuit, the POWER flag is reset since sampling is subsequently allowed. See the timing
diagram below.
Latch circuit output
Sampling pulse
(0)
1 s
Stop
(1)
(1) (1)
(1)
(0)
VDD
POWER flag
VDET
Communication
Latch circuit
output
Sampling pulse
Carry pulse
1 s
(1)
(0)
Communication
POWER flag
[Timing of sampling pulse]
0.5 s
7.8 ms
Carry-up timing
15.6 ms
Latch timing
1 Hz
VDET
Sampling pulse
(1)
(0)
VDD
Stop
Figure 17 Timing of the power voltage detecting circuit
DISCONTINUED
PRODUCT
相關(guān)PDF資料
PDF描述
S-80820ALMP-EAH-T1 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-3511AEFS-TB01 功能描述:實(shí)時(shí)時(shí)鐘 實(shí)時(shí)時(shí)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(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-35-12 制造商:MEANWELL 制造商全稱:Mean Well Enterprises Co., Ltd. 功能描述:S-350-12 350W 12V 29A 單路輸出明緯開關(guān)電源
S35120 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 1.2KV 70A 2PIN DO-203AB - Bulk
S35140 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 1.4KV 70A 2PIN DO-203AB - Bulk
S3515 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:PC POWER SUPPLY SUPERVISORS
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