INDUSTRIAL Timers & Real-Time Clocks 1,864

Reset All

Part	Manufacturer	Peripheral IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	Information Access Method	Maximum Supply Voltage	On Chip Data RAM Width	No. of Bits	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Interrupt Capability	Minimum Supply Voltage	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	Maximum Seated Height	RAM Words	Width	External Data Bus Width	Maximum Clock Frequency	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	No. of Timers	Technology	Maximum Supply Current	Minimum Time	Nominal Supply Voltage	Sub-Category	Bus Compatibility	Terminal Pitch	JESD-30 Code	Moisture Sensitivity Level (MSL)	Qualification	Volatile	JESD-609 Code
X1228V14IZ-2.7A	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm		.032 MHz			5 mm	1	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	YES	e3
ISL12028IVZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm	0	.032 MHz	30	260	5 mm		CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	YES	e3
X1228S14I	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP14,.25	Y	2.7 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.7272 mm		3.9116 mm		.032 MHz			8.6614 mm	1	CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G14	1	Not Qualified	YES	e0
ISL12082IB8Z-T7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0		30	260	4.9 mm		CMOS			3.3 V			1.27 mm	R-PDSO-G8	1			e3
1338BC-31SRI	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8		3.3	SMALL OUTLINE	SOP16,.4	N	2.45 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm	56	7.5 mm	0	.032768 MHz	30	260	10.3 mm		CMOS	.325 mA	SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G16	1	Not Qualified	NO	e3
1338-18DCGI	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			SMALL OUTLINE	SOP8,.25	N	1.4 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm	56	3.9 mm	0	.032768 MHz	30	260	4.9 mm	1	CMOS	.015 mA	SECONDS	1.8 V			1.27 mm	R-PDSO-G8	1		NO	e3
X1227V8I	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.25	Y	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.2 mm		3 mm		.032 MHz			4.4 mm	1	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G8	1	Not Qualified	NO	e0
1338BC-31SRI8	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8		3.3	SMALL OUTLINE	SOP16,.4	N	2.45 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm	56	7.5 mm	0	.032768 MHz	30	260	10.3 mm		CMOS	.325 mA	SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G16	1	Not Qualified	NO	e3
X1227S8I-2.7A	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP8,.25	Y	2.7 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.7272 mm		3.9116 mm		.032 MHz			4.9022 mm	1	CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
ISL12029IB27AZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0	.032 MHz	30	260	8.65 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G14	2	Not Qualified	NO	e3
ISL12029IB30AZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0	.032 MHz	30	260	8.65 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G14	2	Not Qualified	NO	e3
ISL12029IV30AZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm	0	.032 MHz	30	260	5 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	NO	e3
ISL12059IBZ-T	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	3.6 V			2/3.3	SMALL OUTLINE	SOP8,.25	N	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0	.032 MHz	30	260	4.9 mm		CMOS		SECONDS	3 V	Timer or RTC		1.27 mm	R-PDSO-G8	2	Not Qualified	NO	e3
ISL12026AIBZ-T7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0		30	260	4.9 mm		CMOS			3.3 V			1.27 mm	R-PDSO-G8	1			e3
1338-31DVGI	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	N	2.45 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.1 mm	56	3 mm	0	.032768 MHz	30	260	3 mm	1	CMOS	.025 mA	SECONDS	3.3 V			.65 mm	S-PDSO-G8	3		NO	e3
X1228V14I-4.5A	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.2 mm		4.4 mm		.032 MHz			5 mm	1	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G14		Not Qualified	YES	e0
ISL12082IB8Z-T13	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0		30	260	4.9 mm		CMOS			3.3 V			1.27 mm	R-PDSO-G8	1			e3
ISL12026IVZ-T7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		3 mm	0		30	260	4.4 mm		CMOS			3.3 V			.65 mm	R-PDSO-G8	1			e3
1338B-31DVGI8	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V	8		3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	N	2.45 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.1 mm	56	3 mm	0	.032768 MHz	30	260	3 mm		CMOS	.325 mA	SECONDS	3.3 V	Timer or RTC		.65 mm	S-PDSO-G8	3	Not Qualified	NO	e3
ISL12029IBAZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0	.032 MHz	30	260	8.65 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G14	2	Not Qualified	NO	e3
ISL1208IB8-TK	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			2.7 V	85 Cel	-40 Cel		DUAL	1.7272 mm		3.9116 mm			NOT SPECIFIED	NOT SPECIFIED	4.9022 mm		CMOS			3 V			1.27 mm	R-PDSO-G8
X1227S8I	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP8,.25	Y	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.7272 mm		3.9116 mm		.032 MHz			4.9022 mm	1	CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
ISL12024IRTCZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	8	HVSON	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SOLCC8,.12,25	Y	2.7 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	.8 mm		3 mm		.032 MHz	30	260	3 mm		CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	S-PDSO-N8	1	Not Qualified	NO	e3
X1227V8IZ-4.5A	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.25	Y	4.5 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		3 mm		.032 MHz			4.4 mm	1	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G8	1	Not Qualified	NO	e3
1338AC-31SRGI8	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			SMALL OUTLINE	SOP16,.4	N	2.45 V	85 Cel	-40 Cel	TIN	DUAL	2.64 mm	56	7.5 mm	0	.032768 MHz		260	10.21 mm	1	CMOS	.025 mA	SECONDS	3.3 V			1.27 mm	R-PDSO-G16	3		NO	e3
ISL12026IVZ-T13	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		3 mm	0		30	260	4.4 mm		CMOS			3.3 V			.65 mm	R-PDSO-G8	1			e3
ISL12024IRTCZ-T	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	8	HVSON	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SOLCC8,.12,25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	.8 mm		3 mm		.032 MHz	30	260	3 mm		CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	S-PDSO-N8	1	Not Qualified	NO	e3
ISL12057IBZ-T7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	3.6 V				SMALL OUTLINE			1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0		30	260	4.9 mm		CMOS			3 V			1.27 mm	R-PDSO-G8	2			e3
X1227S8I-2.7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP8,.25	Y	2.7 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.7272 mm		3.9116 mm		.032 MHz			4.9022 mm	1	CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
1338B-31DCGI	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8		3.3	SMALL OUTLINE	SOP8,.25	N	2.45 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.75 mm	56	3.9 mm	0	.032768 MHz	30	260	4.9 mm		CMOS	.325 mA	SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
ISL12029AIV27Z	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm	0	.032 MHz	30	260	5 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	NO	e3
X1228V14IZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm		.032 MHz			5 mm	1	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	YES	e3
IS82C54	Renesas Electronics	TIMER, PROGRAMMABLE	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	5.5 V		16		CHIP CARRIER			4.5 V	85 Cel	-40 Cel	TIN LEAD	QUAD	4.57 mm		11.505 mm	8	8 MHz		220	11.505 mm	3	CMOS			5 V			1.27 mm	S-PQCC-J28	3	Not Qualified		e0
ISL12028AIV27Z-T	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm		4.4 mm	0	.032 MHz	30	260	5 mm		CMOS		SECONDS	3.3 V	Timer or RTC		.65 mm	R-PDSO-G14	1	Not Qualified	YES	e3
ISL12026IBZ-T13	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm	0		30	260	4.9 mm		CMOS			3.3 V			1.27 mm	R-PDSO-G8	1			e3
X1228S14IZ-2.7	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			3/5	SMALL OUTLINE	SOP14,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.7272 mm		3.9116 mm		.032 MHz			8.6614 mm	1	CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G14	3	Not Qualified	YES	e3
KS82C54-8IP	Samsung	TIMER, PROGRAMMABLE	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	6 V		16		IN-LINE			4 V	85 Cel	-40 Cel	TIN LEAD	DUAL	5.08 mm		15.24 mm	8				31.75 mm	3	CMOS	20 mA		5 V		8080; 8085; 8086; 8088; 80286; 80386; 68000	2.54 mm	R-PDIP-T24		Not Qualified		e0
KS82C54-8IL	Samsung	TIMER, PROGRAMMABLE	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	6 V		16		CHIP CARRIER			4 V	85 Cel	-40 Cel	TIN LEAD	QUAD	4.572 mm		11.4808 mm	8				11.4808 mm	3	CMOS	20 mA		5 V		8080; 8085; 8086; 8088; 80286; 80386; 68000	1.27 mm	S-PQCC-J28		Not Qualified		e0
KS82C54-10IL	Samsung	TIMER, PROGRAMMABLE	INDUSTRIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	6 V		16		CHIP CARRIER			4 V	85 Cel	-40 Cel	TIN LEAD	QUAD	4.572 mm		11.4808 mm	8				11.4808 mm	3	CMOS	20 mA		5 V		8080; 8085; 8086; 8088; 80286; 80386; 68000	1.27 mm	S-PQCC-J28		Not Qualified		e0
KS82C54-10IP	Samsung	TIMER, PROGRAMMABLE	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	6 V		16		IN-LINE			4 V	85 Cel	-40 Cel	TIN LEAD	DUAL	5.08 mm		15.24 mm	8				31.75 mm	3	CMOS	20 mA		5 V		8080; 8085; 8086; 8088; 80286; 80386; 68000	2.54 mm	R-PDIP-T24		Not Qualified		e0

Timers & Real-Time Clocks

Timers and real-time clocks (RTCs) are electronic devices that are used to measure and track time intervals in electronic systems. They are crucial components in many applications, such as control systems, automation systems, and consumer electronics.

A timer is an electronic device that is used to measure the duration of time intervals. Timers can be either digital or analog and can be used to measure time intervals ranging from microseconds to hours or even days. They can be used for a variety of applications, such as controlling the duration of a signal or triggering an event after a specified time interval.

A real-time clock (RTC) is a clock that keeps track of the current time and date. Unlike a timer, an RTC is capable of keeping track of time even when the system is powered off. RTCs are commonly used in consumer electronics such as watches, clocks, and digital cameras, as well as in control systems, data loggers, and other applications that require accurate timekeeping.