Timers & Real-Time Clocks

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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
DS1338C-33+	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V					SMALL OUTLINE			3 V	85 Cel	-40 Cel	MATTE TIN	DUAL	2.65 mm		7.5 mm			.032 MHz			10.3 mm	1	CMOS			3.3 V			1.27 mm	R-PDSO-G16	1	Not Qualified		e3
DS1338C-33#	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V					SMALL OUTLINE			3 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm		7.5 mm		0	.032 MHz	30	260	10.3 mm	1	CMOS			3.3 V			1.27 mm	R-PDSO-G16	1	Not Qualified	NO	e3
DS1340Z-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	DUAL	1.75 mm		3.9 mm			.032 MHz			4.9 mm		CMOS		SECONDS	1.8 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e0
DS1340Z-18+	Analog Devices	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	Matte Tin (Sn) - annealed	DUAL	1.75 mm		3.9 mm			.032 MHz	30	260	4.9 mm		CMOS		SECONDS	1.8 V	Timer or RTC		1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
DS1501WE+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	28	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP28,.53,22	Y	3 V	70 Cel	0 Cel	MATTE TIN	DUAL	1.2 mm		8 mm		8	.032 MHz			11.8 mm	1	CMOS		SECONDS	3.3 V	Timers or RTCs		.55 mm	R-PDSO-G28	3	Not Qualified	YES	e3
DS1501WE	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	28	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V				3.3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP28,.53,22	Y	3 V	70 Cel	0 Cel	TIN LEAD	DUAL	1.2 mm		8 mm		8	.032 MHz			11.8 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC		.55 mm	R-PDSO-G28	3	Not Qualified	YES	e0
DS1501WZN+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V				3.3	SMALL OUTLINE	SOP28,.4	Y	3 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm		7.5 mm		8	.032 MHz	30	260	17.9 mm	1	CMOS		SECONDS	3.3 V	Timers or RTCs		1.27 mm	R-PDSO-G28	1	Not Qualified	YES	e3
DS1501WZN+T&R	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V				3.3	SMALL OUTLINE	SOP28,.4	Y	3 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	2.65 mm		7.5 mm		8	.032 MHz	30	260	17.9 mm	1	CMOS		SECONDS	3.3 V	Timers or RTCs		1.27 mm	R-PDSO-G28	1	Not Qualified	YES	e3
DS1511Y	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	IN-LINE	DIP28,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm		8	.032 MHz			38.862 mm	1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T28		Not Qualified	NO	e0
DS1511Y+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	IN-LINE	DIP28,.6	Y	4.5 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	9.398 mm		15.24 mm		8	.032 MHz			38.862 mm	1	CMOS		SECONDS	5 V	Timers or RTCs		2.54 mm	R-PDIP-T28		Not Qualified	YES	e3
DS1554-70	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	PIN/PEG	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	IN-LINE	DIP32,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.27 mm		15.24 mm	IT CAN ALSO OPERATE WITH 5V	8	.032 MHz			38.675 mm	0	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-P32	1	Not Qualified	NO	e0
DS1554-70+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	IN-LINE	DIP32,.6	Y	4.5 V	70 Cel	0 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-PDIP-T32		Not Qualified	NO	e3
DS1556-70	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	PIN/PEG	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP32,.6	Y	4.5 V	70 Cel	0 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
DS1556-70+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	PIN/PEG	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP32,.6	Y	4.5 V	70 Cel	0 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
DS1643P-120	Maxim Integrated		COMMERCIAL		34			PLASTIC/EPOXY		PARALLEL					5	MICROELECTRONIC ASSEMBLY	MODULE,34LEAD,1.0	N		70 Cel	0 Cel													CMOS		SECONDS	5 V	Timer or RTC					Not Qualified	NO
DS1646P-120+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	J INVERTED	34		RECTANGULAR	UNSPECIFIED	YES	PARALLEL, DIRECT ADDRESS	5.5 V					MICROELECTRONIC ASSEMBLY			4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	2.3368 mm		23.495 mm		8	.032 MHz	30	260	25.019 mm	0	CMOS			5 V				R-XDMA-U34		Not Qualified		e3
DS1646P-120	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	NO LEAD	34		RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	5.5 V					MICROELECTRONIC ASSEMBLY			4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL					8	.032 MHz				0	CMOS			5 V				R-XDMA-N34	1	Not Qualified		e0
DS1646P+120	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	NO LEAD	34		RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	5.5 V					MICROELECTRONIC ASSEMBLY			4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL					8	.032 MHz				0	CMOS			5 V				R-XDMA-N34		Not Qualified		e3
DS1677E	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	20	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	1.1 mm		4.4 mm	3-CHANNEL, 8-BIT ADC	1	.032 MHz		245	6.5 mm	0	CMOS		SECONDS	5 V	Timer or RTC		.65 mm	R-PDSO-G20	1	Not Qualified	YES	e0
DS1677E+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	20	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V					SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	1.1 mm		4.4 mm	3-CHANNEL, 8-BIT ADC	1	.032 MHz	30	260	6.5 mm		CMOS			5 V			.65 mm	R-PDSO-G20	1	Not Qualified		e3
DS1743WP-120	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	J INVERTED	34		RECTANGULAR	UNSPECIFIED	YES	PARALLEL, DIRECT ADDRESS	3.63 V				3.3	MICROELECTRONIC ASSEMBLY	MODULE,34LEAD,1.0	N	2.97 V	70 Cel	0 Cel	TIN LEAD	DUAL				A POWERCAP MODULE CONTAINING CRYSTAL AND BATTERY REQUIRED	8	.032 MHz				0	CMOS		SECONDS	3.3 V	Timer or RTC			R-XDMA-U34	1	Not Qualified	NO	e0
DS1743WP-120+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	J INVERTED	34		RECTANGULAR	UNSPECIFIED	YES	PARALLEL, DIRECT ADDRESS	3.63 V				3.3	MICROELECTRONIC ASSEMBLY	MODULE,34LEAD,1.0	N	2.97 V	70 Cel	0 Cel	MATTE TIN	DUAL				A POWERCAP MODULE CONTAINING CRYSTAL AND BATTERY REQUIRED	8	.032 MHz				0	CMOS		SECONDS	3.3 V	Timer or RTC			R-XDMA-U34		Not Qualified	NO	e3
DS1904L-F5	Maxim Integrated	TIMER, REAL TIME CLOCK	OTHER	NO LEAD	2		ROUND	METAL	YES	SERIAL, 1-WIRE	6 V					DISK BUTTON			2.8 V	70 Cel	-40 Cel	TIN LEAD	END					0	.032 MHz				0	CMOS			3.3 V				O-MEDB-N2	1	Not Qualified		e0
DS1904L-F5+	Maxim Integrated	TIMER, REAL TIME CLOCK	OTHER	NO LEAD	2		ROUND	METAL	YES	SERIAL, 1-WIRE	6 V					DISK BUTTON			2.8 V	70 Cel	-40 Cel	MATTE TIN	END					0	.032 MHz				0	CMOS			3.3 V				O-MEDB-N2		Not Qualified		e3
DS1904L-F5#	Analog Devices	TIMER, REAL TIME CLOCK	OTHER	NO LEAD	2		ROUND	METAL	YES	SERIAL, 1-WIRE	6 V					DISK BUTTON			2.8 V	70 Cel	-40 Cel		END						.032 MHz	NOT SPECIFIED	NOT SPECIFIED		0	CMOS							O-MEDB-N2		Not Qualified
DS2417P/T&R	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	C BEND	6	LSOC	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 1-WIRE	5.5 V					SMALL OUTLINE, LOW PROFILE			2.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	1.5 mm		3.76 mm			.032 MHz			3.94 mm	0	CMOS			3 V			1.27 mm	R-PDSO-C6	1	Not Qualified		e0
DS2417P+T&R	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	C BEND	6	LSOC	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 1-WIRE	5.5 V					SMALL OUTLINE, LOW PROFILE			2.5 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.5 mm		3.76 mm			.032 MHz	30	260	3.94 mm	0	CMOS			3 V			1.27 mm	R-PDSO-C6	1	Not Qualified		e3
HD6340P	Hitachi	TIMER, PROGRAMMABLE	COMMERCIAL EXTENDED	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16		IN-LINE			4.5 V	75 Cel	-20 Cel	TIN LEAD	DUAL	5.7 mm		15.24 mm	PRESCALED /8 TIMER 3 I/P	8	1 MHz			35.6 mm	3	CMOS	5 mA		5 V		HMCS6800	2.54 mm	R-PDIP-T28		Not Qualified		e0
ISL12026AIBZ	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				30	260	4.9 mm		CMOS			3.3 V			1.27 mm	R-PDSO-G8	1			e3
M41ST85WMH6F	STMicroelectronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	3.6 V				3/3.3	SMALL OUTLINE	SOP28,.5	Y	2.7 V	85 Cel	-40 Cel	TIN	DUAL	3.05 mm		8.56 mm			.032 MHz			18.1 mm	1	CMOS		1/100 SECOND	3 V	Timer or RTC		1.27 mm	R-PDSO-G28	3	Not Qualified	NO	e3
M48T18-100PC1	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V	8				IN-LINE	DIP28,.6	N	4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.65 mm	8184	15.24 mm	10 YEARS DATA RETENTION; ACCURACY 1 MIN/MONTH @ 25 DEGREE C; WRITE PROTECT VOLTAGE = 4.5V	8	.032 MHz			39.625 mm	0	CMOS	80 mA	SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T28		Not Qualified	NO	e3
M48T37V-10MH1F	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	44	SSOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V			8	3.3	SMALL OUTLINE, SHRINK PITCH	SOP44,.5,32	Y	3 V	70 Cel	0 Cel	Matte Tin (Sn)	DUAL	3.05 mm		8.56 mm		8	.032 MHz	30	245	18.1 mm	0	CMOS		SECONDS	3.3 V	Timer or RTC		.81 mm	R-PDSO-G44	3	Not Qualified	NO	e3
MAX16998AAUA+T	Analog Devices																					Matte Tin (Sn) - annealed								30	260			CMOS								1			e3
MAX16998AAUA/V+T	Analog Devices																					Matte Tin (Sn) - annealed								30	260			CMOS								1			e3
MC14536BDW	Onsemi	TIMER, PROGRAMMABLE	MILITARY	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES		18 V					SMALL OUTLINE			3 V	125 Cel	-55 Cel	Tin/Lead (Sn85Pb15)	DUAL	2.65 mm		7.5 mm			2 MHz	30	235	10.3 mm	1	CMOS			5 V			1.27 mm	R-PDSO-G16		Not Qualified		e0
MCP7940N-E/SNVAO	Microchip Technology	TIMER, REAL TIME CLOCK	AUTOMOTIVE	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V	8	AEC-Q100; TS 16949			SMALL OUTLINE	SOP8,.23	Y	1.8 V	125 Cel	-40 Cel		DUAL	1.75 mm	64	3.9 mm		0	.032 MHz			4.9 mm	1	CMOS	.4 mA	SECONDS	2.5 V			1.27 mm	R-PDSO-G8			YES
MK48T02B15	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	5.5 V	8			5	MICROELECTRONIC ASSEMBLY	DIP24,.6	N	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL		2040		WRITE PROTECT VOLTAGE = 4.5V; ACCURACY 1 MIN/MONTH @ 25 DEGREE C; 11 YEARS DATA RETENTION @ 70 DEG C	8					0	CMOS	80 mA	SECONDS	5 V	Timer or RTC		2.54 mm	R-XDMA-T24		Not Qualified	NO	e0
P8253-5	Rochester Electronics	TIMER, PROGRAMMABLE	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16		IN-LINE			4.5 V	70 Cel	0 Cel		DUAL				PROGRAMMABLE MODES	8		NOT SPECIFIED	NOT SPECIFIED		3	NMOS			5 V				R-PDIP-T24
P82C54	Rochester Electronics	TIMER, PROGRAMMABLE	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16		IN-LINE			4.5 V	70 Cel	0 Cel		DUAL				6 PROGRAMMABLE MODES	8	8 MHz	NOT SPECIFIED	NOT SPECIFIED		3	CMOS	20 mA		5 V		10MHZ 8086/88; 10MHZ 80186/188		R-PDIP-T24
PCF8593TD-T	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	6 V				3/5	SMALL OUTLINE	SOP8,.25	Y	2.5 V	85 Cel	-40 Cel		DUAL	1.75 mm		3.9 mm			.032 MHz	NOT SPECIFIED	NOT SPECIFIED	4.9 mm	0	CMOS		1/100 SECOND	3 V	Timer or RTC		1.27 mm	R-PDSO-G8		Not Qualified	YES
PT7C4563BQ1WEX	Diodes Incorporated	TIMER, REAL TIME CLOCK	AUTOMOTIVE	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V		AEC-Q100			SMALL OUTLINE	SOP8,.25	Y	1.3 V	125 Cel	-40 Cel		DUAL	1.75 mm		3.9 mm		0	.032768 MHz			4.9 mm	1	CMOS	.035 mA	SECONDS	3 V			1.27 mm	R-PDSO-G8			NO
RTC-4543SAB	Epson Toyocom	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V					SMALL OUTLINE			2.5 V	85 Cel	-40 Cel		DUAL	3.3 mm		5 mm				NOT SPECIFIED	NOT SPECIFIED	10.1 mm		CMOS			3 V			1.27 mm	R-PDSO-G14		Not Qualified
RTC-4543SA:B	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 3-WIRE	5.5 V				3/5	SMALL OUTLINE	SOP14,.3	N	2.5 V	85 Cel	-40 Cel		DUAL	3.3 mm		5 mm			.032 MHz	NOT SPECIFIED	NOT SPECIFIED	10.1 mm		CMOS		SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G14		Not Qualified	YES
RTC-64613	Seiko Epson	TIMER, REAL TIME CLOCK	COMMERCIAL EXTENDED	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	5.5 V				5	SMALL OUTLINE	SOP24,.5	Y	4.5 V	75 Cel	-20 Cel	TIN LEAD	DUAL	2.8 mm		7.9 mm		8	.032 MHz				0	MOS	2 mA	SECONDS	5 V	Timer or RTC		1.27 mm	R-PDSO-G24		Not Qualified	YES	e0
RTC-72421B	Seiko Epson	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	18	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS/MUXED BUS	5.5 V				5	IN-LINE	DIP18,.3	N	4.5 V	70 Cel	-10 Cel		DUAL	4.2 mm		7.62 mm		4	.032 MHz	NOT SPECIFIED	NOT SPECIFIED	22.606 mm	0	CMOS	.01 mA	SECONDS	5 V	Timer or RTC	8048; 8051; 8085	2.54 mm	R-PDIP-T18		Not Qualified	YES
RTC72421B	Fox Electronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	18	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL	5.5 V				5	IN-LINE	DIP18,.3	N	4.5 V	70 Cel	-10 Cel	TIN LEAD	DUAL			7.62 mm						23.1 mm		CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T18		Not Qualified	YES	e0
S-35390A-I8T1U	Ablic	TIMER, REAL TIME CLOCK	INDUSTRIAL	FLAT	8	VSOF	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V					SMALL OUTLINE, VERY THIN PROFILE			1.3 V	85 Cel	-40 Cel	TIN	DUAL	.5 mm		1.97 mm			.032 MHz			2.23 mm	1	CMOS			3 V			.5 mm	R-PDSO-F8		Not Qualified		e3
TS3006ITD833	Silicon Labs	TIMER, PROGRAMMABLE	INDUSTRIAL	NO LEAD	8	HVSON	SQUARE	PLASTIC/EPOXY	YES		5.25 V					SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE			1.55 V	85 Cel	-40 Cel		DUAL	.8 mm		3 mm		0	.3 MHz			3 mm	0	CMOS			3 V			.65 mm	S-PDSO-N8

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.