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 alarmHow 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

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RS庫存編號 189-8490
製造零件編號DS1374C-33#
HK$56.185
/個 (每包:2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 165-2099
製造零件編號MCP79510-I/MS
BrandMicrochip
HK$10.64
毎管:100 個
單位
Calendar DW:M:Y:LY HH:MM:SS:HSS 64B Serial-SPI Surface Mount MSOP 10 3 x 3 x 0.95mm 3mm 3mm 0.95mm 3.6 V +85 °C
RS庫存編號 923-7642
製造零件編號DS3232MZ+
HK$50.90
毎管:100 個
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Calendar DD:M:Y SS:MM:HH 236B Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 4.5 V +85 °C
RS庫存編號 714-7285
製造零件編號M41T11MH6F
HK$42.79
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Calendar, Chip Deselect, Switch Over DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOH 28 18.49 x 8.89 x 2.69mm 18.49mm 8.89mm 2.69mm 5.5 V +85 °C
RS庫存編號 921-5964
製造零件編號ISL12022MIBZ
HK$55.58
/個 (每包:2個)
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Alarm, Battery Backup, Calendar, Low Battery Detection DW:DM:M:Y SS:MM:HH 128B Serial-I2C Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +85 °C
RS庫存編號 169-8143
製造零件編號Q41404551000101
BrandEPSON
HK$36.501
個 (在毎卷:250)
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Calendar, Timer - - - Serial Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C
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RS庫存編號 189-7226
製造零件編號DS1339C-33#
HK$48.498
毎管:46 個
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Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - 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 165-9585
製造零件編號DS1746WP-120+
HK$238.19
毎管:40 個
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Calendar YY:MM:DD HH:MM:SS 128 x 8bit Parallel Surface Mount Power Cap 34 25.27 x 23.62 x 0.81mm 25.27mm 23.62mm 0.81mm 0.6 V, 3.6 V +70 °C
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RS庫存編號 189-8414
製造零件編號DS1306EN+
HK$55.825
/個 (每包:2個)
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Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 96B Serial-SPI Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 5.5 V +85 °C
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RS庫存編號 189-7205
製造零件編號DS1305+
HK$48.734
毎管:25 個
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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
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RS庫存編號 191-4205
製造零件編號DS1687-3+
HK$127.546
毎管:14 個
單位
- - - 242B Multiplexed Surface Mount EDIP 24 1.34 x 0.72 x 0.37mm 1.34mm 0.72mm 0.37mm 5.5 V +70 °C
RS庫存編號 803-2226
製造零件編號MCP79522-I/MS
BrandMicrochip
HK$10.732
/個 (每包:5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 798-5254
製造零件編號MCP7940N-I/MS
BrandMicrochip
HK$6.73
/個 (每包:10個)
單位
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V +85 °C
RS庫存編號 171-1648
製造零件編號RV-8523-C3-TA-020
HK$48.484
Each (On a Tape of 100)
單位
Alarm, Interrupt, Timer - - - Serial-I2C Surface Mount SON 10 - 3.7mm 3.7mm 2.5mm 5.5 V +85 °C
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RS庫存編號 191-5234
製造零件編號DS1685S-5+
HK$51.217
毎管:30 個
單位
- - - 242B Multiplexed Surface Mount SO 24 15.6 x 7.6 x 2.35mm 15.6mm 7.6mm 2.35mm 5.5 V +70 °C
RS庫存編號 171-0508
製造零件編號AB0805-T3
BrandAbracon
HK$14.592
/個 (每包:5個)
單位
- - - - - Surface Mount 16-VFQFN - - - - - - 85 °C
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RS庫存編號 190-5777
製造零件編號DS1338Z-33+T&R
HK$32.324
/個 (每包:5個)
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- DM:M:DW:Y SS:MM:HH - Serial-I2C Surface Mount μSOP 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS庫存編號 103-9565
製造零件編號DS1390U-33+
HK$26.411
毎管:50 個
單位
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS - Serial-SPI Surface Mount μSOP 10 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
RS庫存編號 889-5121
製造零件編號MCP79410-I/SN
BrandMicrochip
HK$6.669
毎管:100 個
單位
Battery Backup, Calendar, Clock, NV Timekeeping SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.25mm 4.9mm 3.9mm 1.25mm 5.5 V +85 °C
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RS庫存編號 191-4238
製造零件編號DS12885S+
HK$61.802
毎管:30 個
單位
Alarm, Calendar, Clock - HH:MM:SS 144B Multiplexed Surface Mount SOIC 24 15.6 x 7.6 x 2.35mm 15.6mm 7.6mm 2.35mm 5.5 V +70 °C