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 361 - 380,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
全新
RS庫存編號 189-8359
製造零件編號DS1672S-33+
BrandMaxim
HK$29.162
/個 (每包:5個)
單位
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
全新
RS庫存編號 191-3664
製造零件編號DS1307ZN+T&R
BrandMaxim
HK$34.448
/個 (每包:5個)
單位
- DM:M:DW:Y SS:MM:HH - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 4.5 V +85 °C
RS庫存編號 165-9385
製造零件編號DS1746W-120+
BrandMaxim
HK$249.442
毎管:11 個
單位
Calendar YY:MM:DD HH:MM:SS 128 x 8bit Parallel Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 44.2mm 18.8mm 10.92mm 0.6 V, 3.6 V +70 °C
RS庫存編號 797-9423
製造零件編號DS12C887A+
BrandMaxim
HK$84.10
單位
Alarm, Calendar YY:MM:DD HH:MM:SS 128B Multiplexed Through Hole EDIP 24 38.1 x 18.29 x 10.67mm 38.1mm 18.29mm 10.67mm 5.5 V +85 °C
RS庫存編號 904-7519
製造零件編號X1B000301000212
BrandEPSON
HK$31.73
單位
Clock - SS:MM - Serial-I2C Surface Mount - 10 3.2 x 2.5 x 1mm 3.2mm 2.5mm 1mm 5.5 V +85 °C
全新
RS庫存編號 192-1482
製造零件編號DS12R885S-33+
BrandMaxim
HK$42.365
/個 (每包:2個)
單位
Alarm, Leap Year, NV SRAM, Square Wave Output, Trickle Charger YY:MM:DD HH:MM:SS 114B Multiplexed Surface Mount SOIC 24 15.6 x 7.6 x 2.35mm 15.6mm 7.6mm 2.35mm 5.5 V +85 °C
RS庫存編號 165-9585
製造零件編號DS1746WP-120+
BrandMaxim
HK$238.19
毎管:40 個
單位
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
全新
RS庫存編號 191-3690
製造零件編號DS1337U+T&R
BrandMaxim
HK$27.978
/個 (每包:5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 690-2848
製造零件編號RV-3049-C2-STD-025
HK$55.97
單位
Alarm, Calendar, Timer 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 +85 °C
全新
RS庫存編號 189-7228
製造零件編號DS1339U-33+T&R
BrandMaxim
HK$15.969
個 (在毎卷:3000)
單位
Battery Backup, Calendar YY:MM:DD HH:MM:SS - 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
RS庫存編號 797-9593
製造零件編號DS1746-70+
BrandMaxim
HK$369.09
單位
Calendar YY:MM:DD HH:MM:SS 128 x 8bit Parallel Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 44.2mm 18.8mm 10.92mm 0.8 V, 5.3 V +70 °C
全新
RS庫存編號 189-7213
製造零件編號DS1307N+
BrandMaxim
HK$26.614
毎管:50 個
單位
Clock DM:M:DW:Y SS:MM:HH 56B Serial-I2C Through Hole PDIP 8 9.91 x 7.87 x 4.45mm 9.91mm 7.87mm 4.45mm 5.5 V +85 °C
RS庫存編號 146-0283
製造零件編號MCP79411-I/MS
BrandMicrochip
HK$8.636
毎管:100 個
單位
Calendar DW:DM:M:Y HH:MM:SS 64B Serial-2 Wire, 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 171-1646
製造零件編號RV-4162-C7-TA-020
HK$34.024
Each (On a Tape of 100)
單位
Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount SMD 8 3.2 x 1.5 x 0.8mm 3.2mm 1.5mm 0.8mm 4.4 V +85 °C
RS庫存編號 171-1640
製造零件編號RV-3049-C2-TB-008
HK$98.67
Each (On a Tape of 100)
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 189-7241
製造零件編號DS1672S-33+
BrandMaxim
HK$19.754
毎管:100 個
單位
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - 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 732-7327
製造零件編號DS1305EN+
BrandMaxim
HK$52.31
單位
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
RS庫存編號 177-0307
製造零件編號MCP79412-I/MS
BrandMicrochip
HK$8.449
毎管:100 個
單位
- - HH:MM:SS - 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 171-1641
製造零件編號RV-3029-C2-TB-030
HK$49.335
Each (On a Tape of 100)
單位
Battery Backup, Calendar, NV RAM DW:DM:M:Y HH:MM:SS 8B Serial-I2C Surface Mount SON 10 5 x 3.2 x 1.2mm 5mm 3.2mm 1.2mm 5.5 V +85 °C
RS庫存編號 642-3106
製造零件編號CDP68HC68T1MZ
HK$71.26
單位
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 6 V +85 °C