12 Timers & Real-Time Clocks 33

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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	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
RX-8564LC:B3:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	J BEND	12	SOJ	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V				SMALL OUTLINE			1.8 V	85 Cel	-40 Cel	TIN	DUAL	1.2 mm		2.4 mm					260	3.6 mm		CMOS			3 V		.5 mm	R-PDSO-J12				e3
FTL75939UCX	Onsemi	TIMER, PROGRAMMABLE	INDUSTRIAL	BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES		5.5 V				GRID ARRAY, VERY THIN PROFILE, FINE PITCH			1.2 V	85 Cel	-40 Cel	TIN SILVER COPPER	BOTTOM	.625 mm		1.31 mm				30	260	1.615 mm		CMOS			1.8 V		.4 mm	R-PBGA-B12	1			e1
RX-8035LC:B3:PURESN	Seiko Epson		INDUSTRIAL	J BEND	12	TSOJ	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL, 2 WIRE/I2C				2.5/5	SMALL OUTLINE, THIN PROFILE	TSSOJ12,.11,20	Y		85 Cel	-40 Cel	TIN	DUAL							30	260					SECONDS		Timer or RTC	.5 mm	R-PDSO-J12		Not Qualified	NO	e3
PCF85263AUKZ	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,10	Y	.9 V	85 Cel	-40 Cel		BOTTOM	.24 mm	1	.935 mm		0	.032768 MHz		260	1.185 mm	1	CMOS	.000885 mA	SECONDS	3.3 V		.25 mm	R-PBGA-B12	1		NO
PCF8523U/12AA/1,00	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	I2C	5.5 V			1.2/5.5	UNCASED CHIP	DIE OR CHIP	Y	1.2 V	85 Cel	-40 Cel		UPPER						.032 MHz	NOT SPECIFIED	NOT SPECIFIED		1	CMOS		SECONDS	3 V	Timer or RTC		R-XUUC-N12		Not Qualified	YES
RX-8571LC:B	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-8564LC:B0:PURESN	Seiko Epson	TIMER, REAL TIME CLOCK	INDUSTRIAL	J BEND	12	SOJ	RECTANGULAR	PLASTIC/EPOXY	YES	I2C	5.5 V			2/5	SMALL OUTLINE	TSSOJ12,.11,20	Y	1.8 V	85 Cel	-40 Cel	TIN	DUAL	1.2 mm		2.4 mm					260	3.6 mm		CMOS		SECONDS	3 V	Timers or RTCs	.5 mm	R-PDSO-J12		Not Qualified	YES	e3
RX-8571LC:B0: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: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
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
MAX31334ETC+	Analog Devices	TIMER, REAL TIME CLOCK		NO LEAD	12	HVSON	SQUARE	UNSPECIFIED	YES	SERIAL(I2C)	5.5 V	8			SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SOLCC8,.12,20	Y	1.1 V	85 Cel	-40 Cel		DUAL	.8 mm	32	3 mm		0	.032768 MHz			3 mm	1	CMOS		SECONDS	3 V		.5 mm	S-XDSO-N12			YES
MAX31334EWC+T	Analog Devices	TIMER, REAL TIME CLOCK		BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,20	Y	1.1 V	85 Cel	-40 Cel		BOTTOM	.69 mm	32	1.468 mm		0	.032768 MHz			1.968 mm	1	CMOS		SECONDS	3 V		.5 mm	R-PBGA-B12			YES
MAX31334EWC+	Analog Devices	TIMER, REAL TIME CLOCK		BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,20	Y	1.1 V	85 Cel	-40 Cel		BOTTOM	.69 mm	32	1.468 mm		0	.032768 MHz			1.968 mm	1	CMOS		SECONDS	3 V		.5 mm	R-PBGA-B12			YES
MAX31334ETC+T	Analog Devices	TIMER, REAL TIME CLOCK		NO LEAD	12	HVSON	SQUARE	UNSPECIFIED	YES	SERIAL(I2C)	5.5 V	8			SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SOLCC8,.12,20	Y	1.1 V	85 Cel	-40 Cel		DUAL	.8 mm	32	3 mm		0	.032768 MHz			3 mm	1	CMOS		SECONDS	3 V		.5 mm	S-XDSO-N12			YES
MAX31331EWC+	Analog Devices	TIMER, REAL TIME CLOCK		BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V				GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,16	Y	1.1 V	85 Cel	-40 Cel		BOTTOM	.69 mm		1.228 mm			.032768 MHz		260	1.628 mm	1	CMOS		SECONDS	3 V		.4 mm	R-PBGA-B12			YES
MAX31331EWC+T	Analog Devices	TIMER, REAL TIME CLOCK		BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V				GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,16	Y	1.1 V	85 Cel	-40 Cel		BOTTOM	.69 mm		1.228 mm			.032768 MHz		260	1.628 mm	1	CMOS		SECONDS	3 V		.4 mm	R-PBGA-B12			YES
935293887005	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	I2C	5.5 V				UNCASED CHIP			1.2 V	85 Cel	-40 Cel		UPPER						.032 MHz				1	CMOS			3 V			R-XUUC-N12
PCF8523U/12AA/1	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	UNSPECIFIED	UNSPECIFIED	YES	I2C	5.5 V				UNCASED CHIP			1.2 V	85 Cel	-40 Cel		UPPER										1	CMOS			3 V			X-XUUC-N12		Not Qualified
PCF2123U/12HA	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	BUTT	12	VBCC	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V				CHIP CARRIER, VERY THIN PROFILE			1.1 V	85 Cel	-40 Cel		BOTTOM	.17 mm		1.449 mm						1.492 mm	1	CMOS			1.8 V			R-XBCC-B12
PCF2123U/5GA/1,015	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	Timer or RTC		R-XUUC-N12	1	Not Qualified	YES	e3
PCF2123U/10AA	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V				UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER	.2 mm		1.449 mm	SEATED HGT-NOM					1.492 mm	1	CMOS			1.8 V			R-XUUC-N12
PCF2123U	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V				UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER			1.449 mm			.032 MHz			1.492 mm	1	CMOS			1.6 V			R-XUUC-N12		Not Qualified
PCF85263AUK	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	BALL	12	VFBGA	RECTANGULAR	PLASTIC/EPOXY	YES	SERIAL(I2C)	5.5 V	8			GRID ARRAY, VERY THIN PROFILE, FINE PITCH	BGA12,3X4,10	Y	.9 V	85 Cel	-40 Cel		BOTTOM	.24 mm	1	.935 mm		0	.032768 MHz			1.185 mm	1	CMOS	.000885 mA	SECONDS	3.3 V		.25 mm	R-PBGA-B12			NO
PCF2123U/12HA/1	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V		8		UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER					0	.032 MHz				1	CMOS			2 V			R-XUUC-N12		Not Qualified
PCF2123U/10AA/1	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V		8		UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER					0	.032 MHz				1	CMOS			2 V			R-XUUC-N12		Not Qualified
PCF2123U/10AA/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	Timer or RTC		R-XUUC-N12	1	Not Qualified	YES	e3
PCF2123U/12HA/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
PCF2123U/5GA	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V				UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER	.2 mm		1.449 mm	SEATED HGT-NOM					1.492 mm	1	CMOS			1.8 V			R-XUUC-N12
PCF8523U	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	I2C	5.5 V				UNCASED CHIP			1.2 V	85 Cel	-40 Cel		UPPER										1	CMOS			3 V			R-XUUC-N12
PCF2123U/12AA	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	BUTT	12	VBCC	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V				CHIP CARRIER, VERY THIN PROFILE			1.1 V	85 Cel	-40 Cel		BOTTOM	.22 mm		1.449 mm						1.492 mm	1	CMOS			1.8 V			R-XBCC-B12
PCF2123U/12AA/1	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V		8		UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER					0	.032 MHz				1	CMOS			2 V			R-XUUC-N12		Not Qualified
PCF2123U/5GA/1	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	NO LEAD	12	DIE	RECTANGULAR	UNSPECIFIED	YES	SERIAL, 3-WIRE	5.5 V		8		UNCASED CHIP			1.1 V	85 Cel	-40 Cel		UPPER					0	.032 MHz				1	CMOS			2 V			R-XUUC-N12

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.