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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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
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RS庫存編號 191-3234
製造零件編號DS1337U+T&R
HK$11.942
個 (在毎卷:3000)
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
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RS庫存編號 190-4729
製造零件編號DS1305E+T&R
HK$23.392
個 (在毎卷:2500)
單位
Alarm, Real Time Clock, Trickle Charger DM:M:DW:Y SS:MM:HH 96B Serial-SPI Surface Mount TSSOP 20 6.6 x 4.5 x 0.95mm 6.6mm 4.5mm 0.95mm 5.5 V +70 °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
RS庫存編號 146-1117
製造零件編號DS12C887+
HK$76.49
毎管:14 個
單位
Alarm Binary, DW:DM:M:Y Binary, HH:MM:SS 113B Multiplexed Through Hole EDIP 24 34.04 x 18.29 x 9.4mm 34.04mm 18.29mm 9.4mm 5.5 V +70 °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 169-8919
製造零件編號BU9873FJ-GTE2
BrandROHM
HK$3.293
個 (在毎卷:2500)
單位
Real Time Clock YY:MM:DD:dd HH:MM:SS - Serial-I2C Surface Mount SOP 8 5.25 x 3.9 x 1.37mm 5.25mm 3.9mm 1.37mm 5.5 V +85 °C
RS庫存編號 188-9207
製造零件編號M41T82SM6F
HK$11.06
個 (在毎卷:2500)
單位
Alarm, Battery Backup, Calendar, Watchdog Timer Binary, D:D:M:Y:C - 32bit Serial-2 Wire, Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
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RS庫存編號 192-1247
製造零件編號DS1746W-120+
HK$310.375
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 732-7374
製造零件編號DS1340U-33+
HK$31.19
單位
Battery Backup, Calendar DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount μSOP 8 3.05 x 3.05 x 0.95mm 3.05mm 3.05mm 0.95mm 5.5 V +85 °C
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RS庫存編號 190-5205
製造零件編號DS1744-70IND+
HK$343.63
單位
NV SRAM, Real Time Clock Y:M:D:D HH:MM:SS - - Through Hole EDIP 28 39.37 x 18.80 x 10.67mm 39.37mm 18.8mm 10.67mm 5 V +85 °C
RS庫存編號 761-7624
製造零件編號MCP7940MT-I/MNY
BrandMicrochip
HK$5.538
Each (On a Tape of 5)
單位
Calendar, NV SRAM DW:DM:M:Y HH:MM:SS 64B Serial-I2C Surface Mount TDFN 8 2 x 3 x 0.75mm 2mm 3mm 0.75mm 5.5 V +85 °C
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RS庫存編號 191-3235
製造零件編號DS1374U-33+T&R
HK$15.266
個 (在毎卷:3000)
單位
Binary Counter, Real Time Clock, Trickle Charger - - - Serial-I2C Surface Mount μSOP 10 3.16 x 3.12 x 0.95mm 3.16mm 3.12mm 0.95mm 5.5 V +85 °C
RS庫存編號 829-0380
製造零件編號M41T00M6F
HK$22.138
/個 (每包:5個)
單位
Calendar D:M:Y:C HH:MM:SS 8B 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 912-6943
製造零件編號MCP7940M-I/SN
BrandMicrochip
HK$4.292
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
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RS庫存編號 191-5233
製造零件編號DS1050Z-001+
HK$15.759
毎管:100 個
單位
Clock DM:M:DM:Y SS:MM:HH - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
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RS庫存編號 190-5162
製造零件編號DS1372U+
HK$28.462
/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 165-9230
製造零件編號DS1306EN+
HK$42.767
毎管:74 個
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
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RS庫存編號 192-1551
製造零件編號DS1744W-120+
HK$293.66
單位
Calendar YY:MM:DD HH:MM:SS 32 x 8B Parallel Through Hole EDIP 28 39.37 x 18.8 x 10.67mm 39.37mm 18.8mm 10.67mm 0.6 V, 3.6 V +70 °C
RS庫存編號 171-1637
製造零件編號RV-2123-C2-STD-020
HK$51.036
Each (On a Tape of 100)
單位
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-SPI 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 169-8140
製造零件編號Q41457451000200
BrandEPSON
HK$24.753
個 (在毎卷:250)
單位
Alarm, Calendar, Timer - - - Serial Surface Mount SOP 14 5 x 10.1 x 3.2mm 5mm 10.1mm 3.2mm 5.5 V +85 °C