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

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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
RS庫存編號 920-8991
製造零件編號M48T58Y-70PC1
HK$132.13
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
RS庫存編號 686-5030
製造零件編號M48T58Y-70PC1
HK$143.73
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
RS庫存編號 809-1420
製造零件編號M41T81M6F
HK$19.792
/個 (每包:5個)
單位
Alarm Binary HH:MM:SS:hh 20B Serial Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C
RS庫存編號 145-9302
製造零件編號M41T0M6F
HK$8.28
個 (在毎卷:2500)
單位
Real Time Clock DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, 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 103-1580
製造零件編號M41T56M6F
HK$11.338
個 (在毎卷:2500)
單位
Calendar, Chip Deselect, Switch Over 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 920-9120
製造零件編號M41T00M6F
HK$11.344
個 (在毎卷:2500)
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 877-2772
製造零件編號M41T0M6F
HK$13.96
/個 (每包:5個)
單位
Real Time Clock DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, 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 880-5345
製造零件編號M41T94MH6F
HK$40.427
/個 (每包:6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 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 165-5486
製造零件編號M41T83SQA6F
HK$14.344
個 (在毎卷:1000)
單位
Real Time Clock DW:DM:M:Y HH:MM:SS:hh 32B Serial-2 Wire, Serial-I2C Surface Mount QFN 16 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5.5 V +85 °C
RS庫存編號 829-0355
製造零件編號M41T81SM6F
HK$19.06
/個 (每包:5個)
單位
Calendar D:D:M:Y:C HH:MM:SS:HSS 20B 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 714-0855
製造零件編號M41T00SM6F
HK$20.26
單位
- DW:DM:M:Y HH:MM:SS 8B Serial-2 Wire, Serial-I2C Surface Mount SOIC 8 5 x 4 x 1.25mm 5mm 4mm 1.25mm 5.5 V +85 °C
RS庫存編號 624-8466
製造零件編號M48T35Y-70PC1
HK$198.85
單位
Battery Backup, Calendar, Chip Deselect, Switch Over, Write Protection DW:DM:M:Y HH:MM:SS 32768B Parallel Through Hole PCDIP 28 39.88 x 18.34 x 8.89mm 39.88mm 18.34mm 8.89mm 5.5 V +70 °C
RS庫存編號 920-9124
製造零件編號M41T11M6F
HK$15.855
個 (在毎卷:2500)
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 714-7298
製造零件編號M48T18-100PC1
HK$150.46
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
RS庫存編號 828-9977
製造零件編號M48T12-70PC1
HK$118.74
單位
Timekeeper SRAM D:M:Y HH:MM:SS 16kbit - Through Hole PCDIP 24 34.8 x 18.34 x 8.89mm 34.8mm 18.34mm 8.89mm 5.5 V +70 °C
RS庫存編號 877-2784
製造零件編號M41T93RMY6F
HK$29.474
/個 (每包:5個)
單位
Real Time Clock DW:DM:M:Y HH:MM:SS:hh 32B Serial-4 Wire, Serial-I2C Surface Mount SOX 18 11.66 x 7.67 x 2.39mm 11.66mm 7.67mm 2.39mm 5.5 V +85 °C
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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
RS庫存編號 165-8028
製造零件編號M41ST87WMX6TR
HK$49.448
個 (在毎卷:1000)
單位
Calendar, Clock DD:MM:YY HH:MM:SS 128B Serial-I2C Surface Mount SOX 28 18.01 x 7.67 x 2.38mm 18.01mm 7.67mm 2.38mm 3.6 V +85 °C
RS庫存編號 920-9004
製造零件編號M48T58-70PC1
HK$140.16
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
RS庫存編號 920-9010
製造零件編號M41T60Q6F
HK$6.804
個 (在毎卷:3000)
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