Real Time Clocks

What is a Real Time Clock?
A Real Time Clock (RTC) is a computer clock which is usually in the form of an integrated circuit. They have been designed to keep track of time, in real time - hence the product name. A Real Time Clock is usually an integral part of the computer motherboard. More often than not, a RTC will also include a calendar and an alarm

How do Real Time Clocks work?
The memory on the clocks system stores system descriptions and set up values such as "Current Time Value". The information that is held in the RTC is read with a microprocessor, commonly over a serial interface which facilitate the performance of the software functions that are time dependant. They are designed to run on an ultra-low power consumption, often run on a lithium battery source or normal power. This power source allows them to continue running and generating real time when a system is down. The newer models of RTC use super-capacitors as a source of power that can be recharged and soldered to the board.
Some Real Time Clocks feature synchronisation to an external signal, such as a compensated power line frequency. It allows the device to provide an accurate result without having an on-board temperature compensation scheme.

RTC Time Values
• Year
• Month
• Date
• Hours
• Minutes
• Seconds

...
顯示內容 隱藏內容

篩選條件

正在檢視 81 - 100,共 562 項產品
Results per page
Description Price Functions Date Format Time Format User RAM Bus Type Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature
RS庫存編號 139-559
製造零件編號DS1687-5+
BrandMaxim
HK$110.76
單位
Alarm, Battery Backup, Calendar Binary, DW:DM:M:Y Binary, HH:MM:SS 242B Multiplexed Through Hole EDIP 24 34.04 x 18.8 x 9.4mm 34.04mm 18.8mm 9.4mm 5.5 V +70 °C
全新
RS庫存編號 189-7510
製造零件編號DS1307Z+
BrandMaxim
HK$22.593
毎管:100 個
單位
Alarm, Battery Backup, Calendar, Power Fail DW:DM:M:Y HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS庫存編號 729-3221
製造零件編號RV-3049-C2-TB-008
HK$86.86
單位
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 8B Serial-SPI Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +125 °C
全新
RS庫存編號 190-4730
製造零件編號DS1315-5+
BrandMaxim
HK$123.978
毎管:25 個
單位
- - - - - Through Hole PDIP 16 19.43 x 7.87 x 4.45mm 19.43mm 7.87mm 4.45mm 5.5 V +70 °C
全新
RS庫存編號 191-3286
製造零件編號DS1339AU+
BrandMaxim
HK$27.824
毎管:50 個
單位
Real Time Clock - SS:MM:HH - Serial-I2C Surface Mount μSOP 8 3.1 x 0.65 x 0.95mm 3.1mm 0.65mm 0.95mm 5.5 V +85 °C
RS庫存編號 540-4766
製造零件編號DS1305+
BrandMaxim
HK$52.91
單位
Alarm, Calendar DW:DM:M:Y HH:MM:SS 96B Serial-SPI Through Hole PDIP 16 19.43 x 7.87 x 4.45mm 19.43mm 7.87mm 4.45mm 5.5 V +70 °C
RS庫存編號 880-5349
製造零件編號M41T94MQ6F
HK$25.684
/個 (每包:5個)
單位
Alarm, Battery Backup, Interrupt, NVRAM, Real Time Clock, Watchdog Timer Binary, D:D:M:Y:C Binary, HH:MM:SS 44B Serial-SPI Surface Mount SOIC 16 10 x 4 x 1.6mm 10mm 4mm 1.6mm 5.5 V +85 °C
RS庫存編號 923-5832
製造零件編號DS1374C-33#
BrandMaxim
HK$40.47
毎管:46 個
單位
Battery Backup, Calendar, NV RAM Binary SS 3B Serial-I2C Surface Mount SOIC 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +85 °C
RS庫存編號 803-2229
製造零件編號MCP795W21-I/ST
BrandMicrochip
HK$15.09
/個 (每包:5個)
單位
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount SOIC 14 8.65 x 3.9 x 1.25mm 8.65mm 3.9mm 1.25mm 3.6 V +85 °C
RS庫存編號 624-8416
製造零件編號M41T60Q6F
HK$12.572
/個 (每包:5個)
單位
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 8B Serial-I2C Surface Mount QFN 16 3 x 3 x 0.88mm 3mm 3mm 0.88mm 4.4 V +85 °C
全新
RS庫存編號 190-4750
製造零件編號DS3231SN#T&R
BrandMaxim
HK$45.675
個 (在毎卷:1000)
單位
Real Time Clock DM:M:DW:Y SS:MM:HH 236B Serial-I2C Surface Mount SO 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 5.5 V +85 °C
RS庫存編號 829-0399
製造零件編號M41T11M6F
HK$24.308
/個 (每包:5個)
單位
Calendar D:D:M:Y:C HH:MM:SS 56B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS庫存編號 729-3230
製造零件編號RV-8564-C2-TA-010
HK$46.94
單位
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
全新
RS庫存編號 189-8362
製造零件編號DS3232S#
BrandMaxim
HK$79.54
單位
Battery Backup, Calendar, NV RAM DD:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +70 °C
全新
RS庫存編號 189-8509
製造零件編號DS1338U-33+
BrandMaxim
HK$33.70
/個 (每包:5個)
單位
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 56B Serial-I2C Surface Mount μSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
全新
RS庫存編號 189-7200
製造零件編號DS1302S+T&R
BrandMaxim
HK$14.667
個 (在毎卷:2000)
單位
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5.46 x 5.41 x 2.03mm 5.46mm 5.41mm 2.03mm 5.5 V +70 °C
全新
RS庫存編號 189-8655
製造零件編號DS1305E+
BrandMaxim
HK$50.815
/個 (每包:2個)
單位
Alarm, Calendar DW:DM:M:Y HH:MM:SS 96B Serial-SPI Surface Mount TSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 5.5 V +70 °C
RS庫存編號 667-6224
製造零件編號Q42724231000711
BrandEPSON
HK$59.98
單位
Calendar DW:DM:M:Y HH:MM:SS - Parallel Surface Mount SOP 24 16.3 x 7.9 x 2.8mm 16.3mm 7.9mm 2.8mm 5.5 V +85 °C
RS庫存編號 165-2031
製造零件編號MCP79522-I/MS
BrandMicrochip
HK$9.348
毎管:100 個
單位
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS庫存編號 919-6337
製造零件編號M48T18-100PC1
HK$138.27
毎管:12 個
單位
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 8192B Parallel Through Hole PCDIP 28 39.88 x 18.34 x 8.89mm 39.88mm 18.34mm 8.89mm 5.5 V +70 °C