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	Terminal Pitch	JESD-30 Code	Moisture Sensitivity Level (MSL)	Qualification	Volatile	JESD-609 Code
P8254-2	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	TIN LEAD	DUAL				6 PROGRAMMABLE MODES	8					3	NMOS			5 V			R-PDIP-T24		Not Qualified		e0
PCF8563P	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	8	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	I2C	5.5 V				2/5	IN-LINE	DIP8,.3	Y	1.8 V	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	4.2 mm		7.62 mm			.032 MHz			9.5 mm	1	CMOS		SECONDS	2 V	Timer or RTC	2.54 mm	R-PDIP-T8		Not Qualified	YES	e4
PCF8583T/5,112	NXP Semiconductors
PCF8583T/5,118	NXP Semiconductors
PCF8593T	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	6 V	8			3/5	SMALL OUTLINE	SOP8,.25	Y	2.5 V	85 Cel	-40 Cel		DUAL	1.75 mm	8	3.9 mm			.1 MHz	40	260	4.9 mm	0	CMOS	.2 mA	1/100 SECOND	5 V	Timer or RTC	1.27 mm	R-PDSO-G8		Not Qualified	YES
PCF8593T/1	NXP Semiconductors
RTC-62421B:ROHS	Seiko Epson	TIMER, REAL TIME CLOCK
RV-3129-C3-32.768KHZ-OPTION-A-TB-QA	Micro Crystal Ag	TIMER, REAL TIME CLOCK																				Gold (Au) - with Nickel (Ni) barrier								40	260										1			e4
RX-8571LC:B3:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	J BEND	12	SOJ	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				1.8/5	SMALL OUTLINE	TSSOJ12,.11,20	Y	1.6 V	85 Cel	-40 Cel	TIN	DUAL	1.2 mm		2.4 mm				30	260	3.6 mm		CMOS		SECONDS	3 V	Timer or RTC	.5 mm	R-PDSO-J12		Not Qualified	YES	e3
RX-8571LC:B:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	J BEND	12	SOJ	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				1.8/5	SMALL OUTLINE	TSSOJ12,.11,20	Y	1.6 V	85 Cel	-40 Cel	TIN	DUAL	1.2 mm		2.4 mm				30	260	3.6 mm		CMOS		SECONDS	3 V	Timer or RTC	.5 mm	R-PDSO-J12		Not Qualified	YES	e3
RX8010SJ:B0:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK																				TIN								30	260													e3
RX8111CE:B0	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	10	VQCCN	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	YES	I2C	5.5 V	8				CHIP CARRIER, VERY THIN PROFILE	LCC10,.1X.12,27	Y	1.25 V	85 Cel	-40 Cel		QUAD	1 mm	64	2.5 mm		0	.032768 MHz			3.2 mm	1	CMOS		1/1024 SECOND	3 V		.7 mm	R-CQCC-N10			YES
RX8804CE:XB3	Seiko Epson	TIMER, REAL TIME CLOCK
AB-RTCMC-32.768KHZ-AIGZ-S7	Abracon	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	8	SON	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	YES	I2C	4.4 V				1/4.4	SMALL OUTLINE	SOLCC8,.06,35	N	1 V	85 Cel	-40 Cel	GOLD OVER NICKEL	DUAL	.8 mm		1.5 mm			.032 MHz	10	260	3.2 mm	1	CMOS		1/100 SECOND	2 V	Timer or RTC	.9 mm	R-CDSO-N8	1	Not Qualified	NO	e4
BQ3285S-SB2	Texas Instruments	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, MUXED BUS	7 V				5	SMALL OUTLINE	SOP24,.4	Y	-.3 V	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	2.65 mm		7.5 mm		8	.032 MHz	30	260	15.4 mm	1	CMOS	15 mA	SECONDS	5 V	Timer or RTC	1.27 mm	R-PDSO-G24	1	Not Qualified	NO	e4
BQ3285S-SB2G4	Texas Instruments	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, MUXED BUS	5.5 V				5	SMALL OUTLINE	SOP24,.4	Y	4.5 V	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	2.65 mm		7.5 mm		8	.032 MHz	30	260	15.4 mm	1	CMOS		SECONDS	5 V	Timer or RTC	1.27 mm	R-PDSO-G24	1	Not Qualified	NO	e4
BQ4802LYDWR	Texas Instruments	TIMER, REAL TIME CLOCK	COMMERCIAL	GULL WING	28	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	3.6 V				3/3.3	SMALL OUTLINE	SOP28,.4	Y	2.7 V	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	2.65 mm		7.5 mm		8	.032 MHz	30	260	17.9 mm	1	CMOS	9 mA	SECONDS	3 V	Timer or RTC	1.27 mm	R-PDSO-G28	1	Not Qualified	NO	e4
DS1305N	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE	5.5 V				3/5	IN-LINE	DIP16,.3	Y	2 V	85 Cel	-40 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
DS1305N+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE	5.5 V				3/5	IN-LINE	DIP16,.3	Y	2 V	85 Cel	-40 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
DS1339BU+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V				1.8/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	Y	1.71 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.1 mm		3 mm			.032 MHz	30	260	3 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC	.65 mm	S-PDSO-G8	1	Not Qualified	NO	e3
DS1339BU+T	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	8	TSSOP	SQUARE	PLASTIC/EPOXY	YES	I2C	5.5 V				1.8/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP8,.19	Y	1.71 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	1.1 mm		3 mm				30	260	3 mm	1	CMOS		SECONDS	3.3 V	Timer or RTC	.65 mm	S-PDSO-G8	1	Not Qualified	NO	e3
DS1643P-70	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	J INVERTED	34	QCCJ	RECTANGULAR	UNSPECIFIED	YES	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	MODULE,34LEAD,1.0	N	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	2.3368 mm		23.495 mm		8	.032 MHz			25.019 mm	0	CMOS		SECONDS	5 V	Timer or RTC	1.27 mm	R-XDMA-U34	1	Not Qualified	NO	e0
DS1643P-70+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	J INVERTED	34		RECTANGULAR	UNSPECIFIED	YES	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	MODULE,34LEAD,1.0	N	4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL					8	.032 MHz				0	CMOS		SECONDS	5 V	Timer or RTC		R-XDMA-U34	1	Not Qualified	NO	e3
DS1744WP+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					8	.032 MHz				0	CMOS		SECONDS	3.3 V	Timer or RTC		R-XDMA-U34		Not Qualified	NO	e3
DS1744WP-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		Not Qualified	NO	e0
DS1744WP-120+	Analog Devices	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 (Sn) - annealed	DUAL	2.3368 mm		23.495 mm		8	.032 MHz			25.019 mm	0	CMOS		SECONDS	3.3 V	Timer or RTC	1.27 mm	R-XDMA-U34		Not Qualified	NO	e3
ISL12027IB27AZ	Renesas Electronics	TIMER, REAL TIME CLOCK		GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V					SMALL OUTLINE	SOP8,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm			.32768 MHz			4.9 mm		CMOS	3.5 mA	SECONDS	3.3 V		1.27 mm	R-PDSO-G8	1		NO	e3
ISL12027IBZ-T	Renesas Electronics	TIMER, REAL TIME CLOCK		GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V					SMALL OUTLINE	SOP8,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm			.32768 MHz			4.9 mm		CMOS	3.5 mA	SECONDS	3.3 V		1.27 mm	R-PDSO-G8	1		NO	e3
MCP79401T-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		0	.032 MHz	30	260	4.9 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timer or RTC	1.27 mm	R-PDSO-G8	1	Not Qualified	NO	e3
MCP79411T-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	ALSO OPERATES AT 100KHZ WITH 1.8 V NOMINAL	0	.032 MHz	40	260	4.4 mm	1	CMOS	3 mA	SECONDS	2.5 V	Timers or RTCs	.65 mm	R-PDSO-G8	1	Not Qualified	NO	e3
MCP795W22-I/ST	Microchip Technology	TIMER, REAL TIME CLOCK	INDUSTRIAL	GULL WING	14	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(SPI)	5.5 V	8	TS 16949	8	2/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP14,.25	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.2 mm	64	4.4 mm	ALSO OPEARTES AT 1.8 V MINIMUM SUPPLY AT 3 MHZ	0	.032 MHz			5 mm	1	CMOS	5 mA	1/100 SECOND	3 V	Timer or RTC	.65 mm	R-PDSO-G14		Not Qualified	NO	e3
MM58274CN-12	National Semiconductor	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	IN-LINE	DIP16,.3	N	4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	5.08 mm		7.62 mm	PRESCALED XTAL OSCILLATOR OUTPUT FOR RTC	4				21.755 mm	0	CMOS	1 mA	1/10 SECOND	5 V	Timer or RTC	2.54 mm	R-PDIP-T16		Not Qualified	YES	e0
PCF2123U/12AA/1,00	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	4.2 V				1.1/5.5	UNCASED CHIP	WAFER	Y	1.8 V	85 Cel	-40 Cel	MATTE TIN	UPPER						.032 MHz				1	CMOS		SECONDS	2 V	Timers or RTCs		R-XUUC-N12	1	Not Qualified	YES	e3
RA-8565SA:B0:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	AUTOMOTIVE	GULL WING	14	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V		AEC-Q200		2/5	SMALL OUTLINE	SOP14,.3	Y	1.8 V	125 Cel	-40 Cel	TIN	DUAL	3.3 mm		5 mm			.032 MHz	30	260	10.1 mm		CMOS		SECONDS	3 V	Timers or RTCs	1.27 mm	R-PDSO-G14		Not Qualified	YES	e3
RX-4045NB:AA3	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 4-WIRE/SPI	5.5 V					SMALL OUTLINE			1.7 V	85 Cel	-40 Cel		DUAL	1.4 mm		4.8 mm	LG-MAX			NOT SPECIFIED	NOT SPECIFIED	6.3 mm		CMOS			3 V		.5 mm	R-PDSO-N22
RX-4045NB:AA3:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	22	SON	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 4-WIRE/SPI	5.5 V					SMALL OUTLINE			1.7 V	85 Cel	-40 Cel		DUAL	1.4 mm		4.8 mm	LG-MAX				260	6.3 mm		CMOS			3 V		.5 mm	R-PDSO-N22
RX8901CE:XSA06	Seiko Epson	TIMER, REAL TIME CLOCK
RX8901CE:XSB06	Seiko Epson	TIMER, REAL TIME CLOCK
UA556PC	Fairchild Semiconductor																					TIN LEAD												CMOS							2A			e0
DS1244Y-70-IND	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	3.6 V				5	MICROELECTRONIC ASSEMBLY	DIP28,.6	N	3 V	85 Cel	-40 Cel	TIN LEAD	DUAL				ALSO OPERATES AT 5V SUPPLY	8					0	CMOS		1/100 SECOND	3.3 V	Timer or RTC	2.54 mm	R-XDMA-T28		Not Qualified	NO	e0
DS1341U+T&R	Analog Devices	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	Matte Tin (Sn) - annealed	DUAL	1.1 mm		3 mm		0	.032 MHz	30	260	3 mm	1	CMOS		SECONDS	3 V	Timer or RTC	.65 mm	S-PDSO-G8	1	Not Qualified	YES	e3
M41T00CAPPC1	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	I2C	5.5 V				3/5	IN-LINE	DIP24,.6	N	2.7 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.65 mm		15.24 mm						34.545 mm		CMOS		SECONDS		Timer or RTC	2.54 mm	R-PDIP-T24	1	Not Qualified	NO	e3
DS1286+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	PIN/PEG	28	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP28,.6	Y	4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	10.28 mm		15.24 mm	ACCURACY 2 MIN/MONTH @ 25 DEGREE C; 1024 HZ FIXED O/P	8	.032 MHz			38.865 mm	1	CMOS		1/100 SECOND	5 V	Timer or RTC	2.54 mm	R-XDMA-P28		Not Qualified	NO	e3
DS1286	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	PIN/PEG	28	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	5.5 V				5	MICROELECTRONIC ASSEMBLY	DIP28,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	10.28 mm		15.24 mm	ACCURACY 2 MIN/MONTH @ 25 DEGREE C; 1024 HZ FIXED O/P	8	.032 MHz			38.865 mm	1	CMOS		1/100 SECOND	5 V	Timer or RTC	2.54 mm	R-XDMA-P28		Not Qualified	NO	e0
ISL12027IB30AZ-T	Renesas Electronics	TIMER, REAL TIME CLOCK		GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V					SMALL OUTLINE	SOP8,.25	Y	2.7 V	85 Cel	-40 Cel	MATTE TIN	DUAL	1.75 mm		3.9 mm			.32768 MHz			4.9 mm		CMOS	3.5 mA	SECONDS	3.3 V		1.27 mm	R-PDSO-G8	1		NO	e3
M48T59Y-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	Y	4.5 V	70 Cel	0 Cel		DUAL	9.65 mm	8176	15.24 mm		8	.032 MHz	NOT SPECIFIED	245	39.625 mm	0	CMOS	50 mA	SECONDS	5 V	Timer or RTC	2.54 mm	R-PDIP-T28		Not Qualified	NO	e0
CS82C54-12	Renesas Electronics	TIMER, PROGRAMMABLE	COMMERCIAL	J BEND	28	QCCJ	SQUARE	PLASTIC/EPOXY	YES	PARALLEL, DIRECT ADDRESS	5.5 V			16		CHIP CARRIER			4.5 V	70 Cel	0 Cel	TIN LEAD	QUAD	4.57 mm		11.505 mm		8	12 MHz			11.505 mm	3	CMOS			5 V		1.27 mm	S-PQCC-J28	1	Not Qualified		e0
DS1629S	Maxim Integrated	TIMER, REAL TIME CLOCK	MILITARY	GULL WING	8	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 2-WIRE/I2C	5.5 V					SMALL OUTLINE			2.2 V	125 Cel	-55 Cel	TIN LEAD	DUAL	1.75 mm		3.9 mm			.032 MHz		245	4.9 mm	0	CMOS			2.7 V		1.27 mm	R-PDSO-G8	1	Not Qualified		e0

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.