TIMER, REAL TIME CLOCK Timers & Real-Time Clocks 2,400+

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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	Screening Level	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	Additional Features	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
RX-8581NB:B3	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				2/5	SMALL OUTLINE	SOLCC22,.2,20	Y	1.8 V	85 Cel	-40 Cel		DUAL	1.4 mm		4.8 mm	LG-MAX		.032 MHz			6.3 mm		CMOS		SECONDS	2.7 V	Timer or RTC		.5 mm	R-PDSO-N22		Not Qualified	YES
RX-8581NBB-3	Epson Toyocom	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V					SMALL OUTLINE			1.8 V	85 Cel	-40 Cel	TIN/TIN SILVER	DUAL	1.4 mm		4.8 mm				NOT SPECIFIED	NOT SPECIFIED			CMOS			3 V			.5 mm	R-PDSO-N22		Not Qualified		e3/e2
DS1338Z-18	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	1.89 V				1.8	SMALL OUTLINE	SOP8,.25	N	1.71 V	85 Cel	-40 Cel	Tin/Lead (Sn85Pb15)	DUAL	1.75 mm		3.9 mm			.032 MHz			4.9 mm	1	CMOS		SECONDS	1.8 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
DS1338Z-18+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				1.8	SMALL OUTLINE	SOP8,.25	N	1.71 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.75 mm		3.9 mm		0	.032 MHz	30	260	4.9 mm	1	CMOS		SECONDS	1.8 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
PCF8563TS	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V				2/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	Y	1.8 V	85 Cel	-40 Cel		DUAL	1.1 mm		3 mm			.032 MHz		260	3 mm	1	CMOS		SECONDS	2 V	Timer or RTC		.65 mm	S-PDSO-G8		Not Qualified	YES
ISL12022MAIBZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C; SERIAL	5.5 V					SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	2.65 mm		7.5 mm	CASE NO : 64026634	0		30	260	12.8 mm	0	CMOS			3 V			1.27 mm	R-PDSO-G20	1			e3
M48T35Y-70PC1	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V	8			5	IN-LINE	DIP28,.6	N	4.75 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.65 mm	32760	15.24 mm		8	.032 MHz			39.625 mm	0	CMOS	50 mA	SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T28		Not Qualified	NO	e3
MCP79400-I/ST	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8	TS 16949		2/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.25	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm	64	3 mm		0	.032 MHz			4.4 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timer or RTC		.65 mm	R-PDSO-G8	1	Not Qualified	NO	e3
DS1302SN-16/T&R	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				3/5	SMALL OUTLINE	SOP16,.4	N	2 V	85 Cel	-40 Cel	TIN LEAD	DUAL	2.67 mm		7.495 mm	BURST MODE RAM DATA TRANSFER; TIMEKEEPING CURRENT = 0.3UA		.032 MHz			10.285 mm	0	CMOS		SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G16	1	Not Qualified	NO	e0
PCF8583TD-T	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	6 V	8			3/5	SMALL OUTLINE	SOP8,.4	Y	2.5 V	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	2.65 mm	256	7.5 mm			.032 MHz		260	7.55 mm	0	CMOS	.2 mA	1/100 SECOND	5 V	Timer or RTC		1.27 mm	R-PDSO-G8		Not Qualified	YES	e4
MCP79521-I/MS	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	10	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL(SPI)	3.6 V	8	TS 16949			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP10,.19,20	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.1 mm	64	3 mm	ALSO OPEARTES AT 1.8V MIN SUPPLY AT 3MHZ CLOCK FREQ	0	.032 MHz	40	260	3 mm	1	CMOS	5 mA	1/100 SECOND	3 V			.5 mm	S-PDSO-G10	2		NO	e3
M41T01M6F	STMicroelectronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V					SMALL OUTLINE			2 V	85 Cel	-40 Cel		DUAL	1.75 mm		3.9 mm		0		NOT SPECIFIED	NOT SPECIFIED	4.9 mm		CMOS						1.27 mm	R-PDSO-G8
RX8130CE:B0	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	10	VSON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V					SMALL OUTLINE, VERY THIN PROFILE		Y	1.25 V	85 Cel	-40 Cel	GOLD	DUAL	1 mm		2.5 mm				30	260	3.2 mm		CMOS	.0005 mA	SECONDS	3 V				R-PDSO-N10			NO	e4
X1226S8I	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
AB1815-T3	Abracon	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	16	HVQCCN	SQUARE	UNSPECIFIED	YES	I2C; SERIAL, 4-WIRE/3-WIRE	3.6 V				1.8/3.3	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC16,.12SQ,20	Y	1.5 V	85 Cel	-40 Cel		QUAD	.9 mm		3 mm			.032 MHz			3 mm	1	CMOS		SECONDS	1.8 V	Timer or RTC		.5 mm	S-XQCC-N16	1	Not Qualified	NO
DS1391U-33	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	10	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP10,.19,20	Y	2.97 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.1 mm		3 mm			.032 MHz			3 mm	1	CMOS		1/100 SECOND	3.3 V	Timers or RTCs		.5 mm	S-PDSO-G10	1	Not Qualified	YES	e0
DS1391U-33+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	10	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP10,.19,20	Y	2.97 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.1 mm		3 mm			.032 MHz	30	260	3 mm	1	CMOS		1/100 SECOND	3.3 V	Timers or RTCs		.5 mm	S-PDSO-G10	1	Not Qualified	NO	e3
DS1392U-33	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	10	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP10,.19,20	Y	2.97 V	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	1.1 mm		3 mm			.032 MHz	20	240	3 mm	1	CMOS		1/100 SECOND	3.3 V	Timer or RTC		.5 mm	S-PDSO-G10	1	Not Qualified	YES	e0
DS1392U-33+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	10	TSSOP	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP10,.19,20	Y	2.97 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.1 mm		3 mm			.032 MHz	30	260	3 mm	1	CMOS		1/100 SECOND	3.3 V	Timers or RTCs		.5 mm	S-PDSO-G10	1	Not Qualified	NO	e3
DS12CR887-33	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	3.63 V				3.3	IN-LINE	DIP24,.6	Y	2.97 V	85 Cel	-40 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	NO	e0
DS12CR887-33+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	3.63 V				3.3	IN-LINE	DIP24,.6	Y	2.97 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e3
DS1672S-33/T&R	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	3.63 V				3.3	SMALL OUTLINE	SOP8,.25	N	2.97 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.75 mm		3.9 mm			.032 MHz			4.9 mm	0	CMOS		SECONDS	3.3 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
DS1672S-33+T&R	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	3.63 V				3.3	SMALL OUTLINE	SOP8,.25	N	2.97 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.75 mm		3.9 mm			.032 MHz	30	260	4.9 mm	0	CMOS		SECONDS	3.3 V	Timers or RTCs		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
ISL12026IBZ-T7A	Renesas Electronics	TIMER, REAL TIME CLOCK																				MATTE TIN								30	260											1			e3
M41T94MQ6F	STMicroelectronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				3/5	SMALL OUTLINE	SOP16,.25	Y	2.7 V	85 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	1.75 mm		3.9 mm	WATCHDOG TIMER		.032 MHz	30	260	9.9 mm	1	CMOS		1/100 SECOND	3 V	Timer or RTC		1.27 mm	R-PDSO-G16	1	Not Qualified	YES	e4
MCP79411T-I/MS	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V	8	TS 16949		2/5	SMALL OUTLINE	SOP8,.19	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.1 mm	64	3 mm	ALSO OPERATES AT 100KHZ WITH 1.8 V NOMINAL	0	.032 MHz	40	260	3 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timers or RTCs		.65 mm	S-PDSO-G8	1	Not Qualified	NO	e3
MCP79412-I/MS	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V	8	TS 16949		2/5	SMALL OUTLINE	SOP8,.19	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.1 mm	64	3 mm	ALSO OPERATES AT 100KHZ WITH 1.8 V NOMINAL	0	.032 MHz	40	260	3 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timers or RTCs		.65 mm	S-PDSO-G8	1	Not Qualified	NO	e3
MCP79412T-I/SN	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8	TS 16949		2/5	SMALL OUTLINE	SOP8,.23	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm	64	3.9 mm	ALSO OPERATES AT 100KHZ WITH 1.8 V NOMINAL	0	.032 MHz	30	260	4.9 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timers or RTCs		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
FT3001UMX	Onsemi	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD		VQCCN	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 2-WIRE/I2C	5 V					CHIP CARRIER, VERY THIN PROFILE			1.8 V	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	QUAD	.55 mm		1.4 mm				30	260	1.8 mm		CMOS			3 V			.4 mm	R-XQCC-N	1			e4
PCF2123BS/1,118	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	16	HVQCCN	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V			8	1.1/5.5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC16,.12SQ,20	Y	1.1 V	85 Cel	-40 Cel	MATTE TIN	QUAD	1 mm		3 mm			.032 MHz			3 mm	1	CMOS		SECONDS	2 V	Timer or RTC		.5 mm	S-PQCC-N16	1	Not Qualified	YES	e3
MCP7940NT-E/MSVAO	Microchip Technology	TIMER, REAL TIME CLOCK		GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V	8	AEC-Q100			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	Y	1.8 V	125 Cel	-40 Cel		DUAL	1.1 mm	64	3 mm		0	.032768 MHz			3 mm	1	CMOS		SECONDS	2.5 V			.65 mm	S-PDSO-G8			NO
RV-4162-C7-32.768KHZ-10PPM-TA-QC	Micro Crystal Ag	TIMER, REAL TIME CLOCK																				GOLD								40	260														e4
RV-8803-C7TAQA	Micro Crystal Ag	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	8	VSON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V		AEC-Q200			SMALL OUTLINE, VERY THIN PROFILE	SOLCC8,.06,35	Y	1.5 V	85 Cel	-40 Cel	GOLD OVER NICKEL	DUAL	.8 mm		1.5 mm	IT ALSO OPERATES AT 2 TO 5.5 POWER SUPPLY VOLTAGE	0		40	260	3.2 mm	1	CMOS	.06 mA		3 V		I2C	.9 mm	R-PDSO-N8	1		YES	e4
DS1344D-33+T&R	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	14	HVSON	SQUARE	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V					SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE			3 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	.8 mm		3 mm				30	260	3 mm	1	CMOS			3.3 V			.4 mm	S-PDSO-N14	1			e3
ISL12022MIBZ-TR5421	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				3/5	SMALL OUTLINE	SOP20,.4	Y	2.7 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm		7.5 mm			.032 MHz	30	260	12.8 mm		CMOS		SECONDS	3 V	Timer or RTC		1.27 mm	R-PDSO-G20	1	Not Qualified	NO	e3
M48T35Y-70MH1E	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	5.5 V				5	SMALL OUTLINE	SOP28,.5	N	4.5 V	70 Cel	0 Cel	TIN	DUAL	3.05 mm		8.56 mm		8	.032 MHz			18.1 mm	0	CMOS		SECONDS	5 V	Timers or RTCs		1.27 mm	R-PDSO-G28	3	Not Qualified	NO	e3
DS1556-70IND	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	PIN/PEG	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP32,.6	Y	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	10.922 mm		15.24 mm		8	.032 MHz			43.053 mm		CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDMA-P32		Not Qualified	NO	e0
DS1556-70IND+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	PIN/PEG	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP32,.6	Y	4.5 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	10.922 mm		15.24 mm		8	.032 MHz			43.053 mm		CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDMA-P32		Not Qualified	NO	e3
MCP79510T-I/MN	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	10	HVSON	SQUARE	PLASTIC/EPOXY	YES	SERIAL(SPI)	3.6 V	8	TS 16949			SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SOLCC10,.12,20	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	.8 mm	64	3 mm	ALSO OPEARTES AT 1.8V MIN SUPPLY AT 3MHZ CLOCK FREQ	0	.032 MHz			3 mm	1	CMOS	5 mA	1/100 SECOND	3 V			.5 mm	S-PDSO-N10			NO	e3
RV-4162-C7	Micro Crystal Ag	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	8	SON	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	YES	I2C	4.4 V					SMALL OUTLINE			1 V	85 Cel	-40 Cel	GOLD	DUAL	.8 mm		1.5 mm	ALSO REQUIRED 1.3V-4.4V SUPPLY FOR I2C BUS ACTIVE			20	260	3.2 mm		CMOS						.9 mm	R-CDSO-N8				e4
RX8900CE:UA	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	10	VSON	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	YES	I2C	5.5 V					SMALL OUTLINE, VERY THIN PROFILE			2.5 V	85 Cel	-40 Cel	GOLD	DUAL	1 mm		2.5 mm				30	260	3.2 mm		CMOS			3 V				R-CDSO-N10				e4
ISL12022MIBZ-T	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C; SERIAL	5.5 V					SMALL OUTLINE			2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	2.65 mm		7.5 mm	ALSO OPERATES WITH 5 V NOMINAL	0		30	260	12.8 mm		CMOS			3 V			1.27 mm	R-PDSO-G20	1			e3
DS1305	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE	5.5 V				3/5	IN-LINE	DIP16,.3	Y	2 V	70 Cel	0 Cel	TIN LEAD	DUAL	4.572 mm		7.62 mm		0	.032 MHz			19.175 mm	0	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T16	1	Not Qualified	YES	e0
DS1305+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE	5.5 V				3/5	IN-LINE	DIP16,.3	Y	2 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	4.572 mm		7.62 mm		0	.032 MHz	30	260	19.175 mm	0	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T16	1	Not Qualified	YES	e3
M41T81SM6T	STMicroelectronics	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	1.75 mm		3.9 mm			.032 MHz			4.9 mm	1	CMOS						1.27 mm	R-PDSO-G8		Not Qualified
RV-4162-C7-32.768KHZ-20PPM-TA-QA	Micro Crystal Ag	TIMER, REAL TIME CLOCK																				GOLD								40	260														e4
RX-8581NB:B0	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				2/5	SMALL OUTLINE	SOLCC22,.2,20	Y	1.8 V	85 Cel	-40 Cel		DUAL	1.4 mm		4.8 mm	LG-MAX		.032 MHz			6.3 mm		CMOS		SECONDS	2.7 V	Timer or RTC		.5 mm	R-PDSO-N22		Not Qualified	YES
RX-8581NBB-0	Epson Toyocom	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V					SMALL OUTLINE			1.8 V	85 Cel	-40 Cel	TIN/TIN SILVER	DUAL	1.4 mm		4.8 mm				NOT SPECIFIED	NOT SPECIFIED			CMOS			3 V			.5 mm	R-PDSO-N22		Not Qualified		e3/e2

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.