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
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
全新
RS庫存編號 190-5241
製造零件編號DS3231SN#T&R
HK$85.82
單位
Real Time Clock DM:M:DW:Y SS:MM:HH 236B Serial-I2C Surface Mount SO 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 146-0221
製造零件編號MCP79521-I/MS
BrandMicrochip
HK$10.948
毎管:100 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 169-8145
製造零件編號Q418564C2000511
BrandEPSON
HK$26.983
個 (在毎卷:250)
單位
Alarm, Calendar, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount VSOJ 12 - 3.6mm 2.4mm - 5.5 V +85 °C
全新
RS庫存編號 190-4753
製造零件編號DS3234S#T&R
HK$40.874
個 (在毎卷:1000)
單位
SRAM - SS:MM:HH 256B - Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +70 °C
RS庫存編號 171-0195
製造零件編號AB0805-T3
BrandAbracon
HK$6.811
個 (在毎卷:3000)
單位
- - - - - Surface Mount 16-VFQFN - - - - - - 85 °C
RS庫存編號 188-9366
製造零件編號M41ST85WMX6TR
HK$119.25
單位
Alarm, Battery Backup, Calendar, Watchdog Timer Binary, D:D:M:Y:C - 64bit - Surface Mount SOX 28 18.01 x 7.67 x 2.39mm 18.01mm 7.67mm 2.39mm 3.6 V +85 °C
RS庫存編號 727-5743
製造零件編號PCA8565TS/1,118
BrandNXP
HK$13.505
/個 (每包:2個)
單位
Alarm, Calendar, Interrupt, Timer DW:DM:M:Y HH:MM:SS - Serial-I2C Surface Mount TSSOP 8 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +125 °C
RS庫存編號 761-9771
製造零件編號DS1302Z+T&R
HK$27.29
單位
Battery Backup, Calendar, NV RAM YY:MM:DD HH:MM:SS 31B Serial-3 Wire Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
RS庫存編號 177-0305
製造零件編號MCP7940N-E/SN
BrandMicrochip
HK$6.639
毎管:100 個
單位
- - HH:MM:SS - Serial-I2C Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 4.9mm 3.9mm 1.5mm 5.5 V +125 °C
RS庫存編號 810-3933
製造零件編號MCP7940N-I/P
BrandMicrochip
HK$6.90
/個 (每包:10個)
單位
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 732-7585
製造零件編號DS3232S#
HK$69.60
單位
Battery Backup, Calendar, NV RAM DD:M:Y HH:MM:SS - Serial-I2C Surface Mount SOIC 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm 5.5 V +70 °C
RS庫存編號 169-8315
製造零件編號DS1302Z+
HK$22.638
毎管:100 個
單位
Calendar, NV RAM, Trickle Charger DW:DM:M:Y HH:MM:SS 31B Serial Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +70 °C
全新
RS庫存編號 192-1620
製造零件編號DS1511W+
HK$185.03
單位
Alarm, Watchdog Timer YY:MM:DD HH:MM:SS 256B Parallel Through Hole EDIP 28 37.34 x 14.61 x 4.45mm 37.34mm 14.61mm 4.45mm 5.5 V +70 °C
RS庫存編號 496-874
製造零件編號CDP68HC68T1EZ
BrandIntersil
HK$100.63
單位
Alarm, Battery Backup, Calendar, Watchdog Timer DW:DM:M:Y HH:MM:SS 32B Serial-SPI Through Hole PDIP 16 19.68 x 7.11 x 4.95mm 19.68mm 7.11mm 4.95mm 6 V +85 °C
全新
RS庫存編號 190-5750
製造零件編號DS1338U-33+T&R
HK$32.324
/個 (每包:5個)
單位
- DM:M:DW: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
全新
RS庫存編號 189-8434
製造零件編號DS1371U+
HK$27.134
/個 (每包:5個)
單位
Calendar, NV RAM Binary Binary 3B 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
全新
RS庫存編號 192-1236
製造零件編號DS1511W+
HK$168.296
毎管:12 個
單位
Alarm, Watchdog Timer YY:MM:DD HH:MM:SS 256B Parallel Through Hole EDIP 28 37.34 x 14.61 x 4.45mm 37.34mm 14.61mm 4.45mm 5.5 V +70 °C
RS庫存編號 797-9483
製造零件編號DS1556-70+
HK$325.81
單位
Alarm, NV SRAM, Watchdog Timer, Y2K YY:MM:DD HH:MM:SS - 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 190-5143
製造零件編號DS1340Z-33+T&R
HK$32.324
/個 (每包:5個)
單位
- - SS:MM:HH - Serial-I2C Surface Mount SO 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C