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

...
顯示內容 隱藏內容

篩選條件

正在檢視 361 - 380,共 460 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 667-6234
製造零件編號Q41454351000200
BrandEPSON
HK$25.40
單位
Calendar DW:DM:M:Y HH:MM:SS - Serial Surface Mount SOP 14 10.1 x 5 x 3.15mm 10.1mm 5mm 3.15mm 5.5 V +85 °C
RS庫存編號 803-2226
製造零件編號MCP79522-I/MS
BrandMicrochip
HK$10.95
/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 880-5342
製造零件編號M41T62LC6F
HK$32.35
/個 (每包:5個)
單位
Alarm, Calendar, Real Time Clock, Square Wave Output, Watchdog Timer Binary, D:D:M:Y:C Binary, HH:MM:SS 16B Serial Surface Mount CLCC 8 3.3 x 1.6 x 0.8mm 3.3mm 1.6mm 0.8mm 4.4 V +85 °C
RS庫存編號 190-5162
製造零件編號DS1372U+
HK$26.09
/個 (每包:5個)
單位
Alarm, Binary Counter, Real Time Clock - - - Serial-I2C, Serial-SPI 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 169-8293
製造零件編號ISL12026IBZ
BrandIntersil
HK$24.30
毎管:98 個
單位
Alarm, Battery Backup, Calendar, Switch Over DW:DM:M:Y HH:MM:SS 512B 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 191-3690
製造零件編號DS1337U+T&R
HK$24.69
/個 (每包:5個)
單位
Real Time Clock D:D:M:Y 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 190-5169
製造零件編號DS1682S+T&R
HK$43.32
單位
Alarm - - - - Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS庫存編號 774-7403
製造零件編號MCP7940M-I/P
BrandMicrochip
HK$5.55
個 (以毎袋:10)
單位
Alarm, Calendar DW:DM:M:Y HH:MM:SS 64B Serial-I2C Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 10.16mm 7.11mm 4.95mm 5.5 V +85 °C
RS庫存編號 190-5149
製造零件編號DS1670E+
HK$80.11
單位
Real Time Clock, SRAM DM:M:DW:Y SS:MM:HH - Multiplexed Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 3.63 V +70 °C
RS庫存編號 921-5396
製造零件編號CDP68HC68T1M2Z
HK$123.09
單位
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Surface Mount SOIC W 16 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm 2.35mm 6 V +85 °C
RS庫存編號 921-5964
製造零件編號ISL12022MIBZ
HK$55.79
/個 (每包:2個)
單位
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 889-5121
製造零件編號MCP79410-I/SN
BrandMicrochip
HK$6.76
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
RS庫存編號 189-7198
製造零件編號DS1302N+
HK$29.18
毎管:50 個
單位
Trickle Charger DM:M:DW:Y SS:MM:HH 31B Serial-3 Wire 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 540-4772
製造零件編號DS1307Z+
HK$31.99
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 912-6943
製造零件編號MCP7940M-I/SN
BrandMicrochip
HK$4.38
毎管:100 個
單位
Calendar, NV 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
RS庫存編號 817-3654
製造零件編號MCP79410T-I/MS
BrandMicrochip
HK$7.06
個 (在毎卷:2500)
單位
Alarm, Battery Backup, Calendar, Clock DW:D: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 177-0307
製造零件編號MCP79412-I/MS
BrandMicrochip
HK$8.449
毎管:100 個
單位
- D:M:Y, DW 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 171-1656
製造零件編號RV-3049-C3-TB-QA-OPT.A
HK$67.924
Each (On a Tape of 100)
單位
Alarm, Battery Backup, Calendar, Clock D:W:M:Y HH:MM:SS 8B Serial-4 Wire, Serial-SPI Surface Mount SON 10 3.7 x 2.5 x 0.9mm 3.7mm 2.5mm 0.9mm 5.5 V +85 °C
RS庫存編號 171-1646
製造零件編號RV-4162-C7-TA-020
HK$34.08
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 177-0905
製造零件編號MCP795W10-I/SL
BrandMicrochip
HK$13.21
/個 (每包:5個)
單位
- D:M:Y, DW HH:MM:SS - Serial-SPI Surface Mount SOIC 14 8.65 x 3.9 x 1.5mm 8.65mm 3.9mm 1.5mm 3.6 V +85 °C