THROUGH-HOLE Timers & Real-Time Clocks 573

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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	Maximum Output Clock Frequency	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	Total Dose (V)	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
DS17485-5+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	5.08 mm		15.24 mm		8	.032 MHz	30	260	31.75 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	NO	e3
DS17485-5	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	5.08 mm		15.24 mm		8	.032 MHz			31.75 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	YES	e0
BQ4287MT-SB2	Texas Instruments	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, MUXED BUS	5.5 V					5	MICROELECTRONIC ASSEMBLY	DIP24,.6	Y	4.5 V	70 Cel	0 Cel		DUAL					8		NOT SPECIFIED	NOT SPECIFIED			1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-XDMA-T24		Not Qualified	NO
M48T18-150PC1	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		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
DS17287-5	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e0
DS17287-5+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	YES	e3
UPD71054C-10	Renesas Electronics	TIMER, PROGRAMMABLE	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16			IN-LINE			4.5 V	85 Cel	-40 Cel	TIN LEAD	DUAL	5.72 mm		15.24 mm		8	10 MHz					3	CMOS			5 V			2.54 mm	R-PDIP-T24				e0
DS17487-5	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e0
DS17487-5+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	NO	e3
M48T35AV-10PC1	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	3.6 V					3.3	IN-LINE	DIP28,.6	N	3 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.65 mm		15.24 mm		8	.032 MHz			39.625 mm		0	CMOS		SECONDS	3.3 V	Timer or RTC		2.54 mm	R-PDIP-T28		Not Qualified	NO	e3
DS1687-3	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	3.7 V					3	IN-LINE	DIP24,.6	Y	2.7 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	3 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e0
DS1687-3+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	3.7 V					3	IN-LINE	DIP24,.6	Y	2.7 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	9.398 mm		15.24 mm		8	.032 MHz			33.782 mm		1	CMOS		SECONDS	3 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	YES	e3
PCF8583PN	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	8	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	I2C	6 V	8					IN-LINE			2.5 V	85 Cel	-40 Cel		DUAL	4.2 mm	256	7.62 mm			.1 MHz	40	250	9.5 mm		0	CMOS	.2 mA		5 V			2.54 mm	R-PDIP-T8		Not Qualified
CDP68HC68T1EZ	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE/SPI	6 V	8					IN-LINE	DIP16,.3	Y	3 V	85 Cel	-40 Cel	MATTE TIN	DUAL	5.33 mm	32	7.62 mm		0	4 MHz			19.17 mm		0	CMOS		SECONDS	3.3 V			2.54 mm	R-PDIP-T16			YES	e3
MC14541BCPG	Onsemi	TIMER, PROGRAMMABLE	MILITARY	THROUGH-HOLE	14	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		18 V						IN-LINE			3 V	125 Cel	-55 Cel	Tin (Sn)	DUAL	4.69 mm		7.62 mm		0	3 MHz	40	260	18.86 mm		1	CMOS			5 V			2.54 mm	R-PDIP-T14		Not Qualified		e3
DS1315-5	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, FIXED PROTOCOL	5.5 V					5	IN-LINE	DIP16,.3	N	4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	4.572 mm		7.62 mm		0	.032 MHz			19.175 mm		0	CMOS		1/100 SECOND	5 V	Timer or RTC		2.54 mm	R-PDIP-T16	1	Not Qualified	YES	e0
DS1315-5+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, FIXED PROTOCOL	5.5 V					5	IN-LINE	DIP16,.3	N	4.5 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		1/100 SECOND	5 V	Timer or RTC		2.54 mm	R-PDIP-T16	1	Not Qualified	YES	e3
IP82C54Z	Renesas Electronics	TIMER, PROGRAMMABLE	INDUSTRIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16			IN-LINE			4.5 V	85 Cel	-40 Cel	MATTE TIN	DUAL	6.35 mm		15.24 mm		8	8 MHz			31 mm		3	CMOS			5 V			2.54 mm	R-PDIP-T24		Not Qualified		e3
M48T86PC1	STMicroelectronics	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V	8			.008192 MHz	5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.65 mm	114	15.24 mm		8	.032 MHz			34.545 mm		1	MOS	15 mA	SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e3
PCF8583P/F5,112	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	8	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	I2C	6 V	8				3/5	IN-LINE	DIP8,.3	Y	2.5 V	85 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	4.2 mm	256	7.62 mm			.1 MHz	40	250	9.5 mm		0	CMOS	.2 mA	1/100 SECOND	5 V	Timer or RTC		2.54 mm	R-PDIP-T8		Not Qualified	YES	e4
DS1744W-120IND	Maxim Integrated	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	UNSPECIFIED	NO	PARALLEL, DIRECT ADDRESS	3.63 V					3.3	MICROELECTRONIC ASSEMBLY	DIP32,.6	N	2.97 V	85 Cel	-40 Cel	TIN LEAD	DUAL	10.42 mm		15.24 mm		8	.032 MHz			38.865 mm		0	CMOS		SECONDS	3.3 V	Timer or RTC		2.54 mm	R-XDMA-T28		Not Qualified	NO	e0
DS1744W-120IND+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	3.63 V					3.3	IN-LINE	DIP32,.6	N	2.97 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	10.668 mm		15.24 mm		8	.032 MHz			38.227 mm		0	CMOS		SECONDS	3.3 V	Timer or RTC		2.54 mm	R-PDIP-T28		Not Qualified	NO	e3
PCF8583P	NXP Semiconductors	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	8	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	I2C	6 V	8				3/5	IN-LINE	DIP8,.3	Y	2.5 V	85 Cel	-40 Cel		DUAL	4.2 mm	248	7.62 mm	TIMEKEEPING CURRENT = 10UA; AUTO WORD INCREMENTING	0	1 MHz	40	250	9.5 mm		0	CMOS	.2 mA	1/100 SECOND	5 V	Timer or RTC		2.54 mm	R-PDIP-T8		Not Qualified	YES
DS1685-5	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6		4.5 V	70 Cel	0 Cel	TIN LEAD	DUAL	5.08 mm		15.24 mm		8	.032 MHz			31.75 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	YES	e0
DS1685-5+	Analog Devices	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V					5	IN-LINE	DIP24,.6	Y	4.5 V	70 Cel	0 Cel	Matte Tin (Sn) - annealed	DUAL	5.08 mm		15.24 mm		8	.032 MHz	30	260	31.75 mm		1	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24	1	Not Qualified	YES	e3
M48T35-70PC1	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	Timers or RTCs		2.54 mm	R-PDIP-T28		Not Qualified	NO	e3
MM58167BN	Texas Instruments	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V						IN-LINE			4.5 V	70 Cel	0 Cel		DUAL	5.334 mm		15.24 mm		8	.032 MHz			31.915 mm			CMOS			5 V			2.54 mm	R-PDIP-T24
DS1747-70IND+	Analog Devices	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	32	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.5 V					5	IN-LINE	DIP32,.6	N	4.5 V	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	DUAL	10.922 mm		15.24 mm		8	.032 MHz			43.053 mm		0	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T32		Not Qualified	NO	e3
MC14541BCP	Onsemi	TIMER, PROGRAMMABLE	MILITARY	THROUGH-HOLE	14	DIP	RECTANGULAR	PLASTIC/EPOXY	NO		18 V						IN-LINE			3 V	125 Cel	-55 Cel	Tin/Lead (Sn80Pb20)	DUAL	4.69 mm		7.62 mm			3 MHz	30	235	18.86 mm		1	CMOS			5 V			2.54 mm	R-PDIP-T14		Not Qualified		e0
MSM6242BRS	Lapis Semiconductor	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	18	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS/MUXED BUS	6 V					5	IN-LINE	DIP18,.3	N	4 V	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	5.08 mm		7.62 mm	TIMEKEEPING CURRENT = 10UA; MIN PROGRAMMABLE DELAY = 0.01562S; 30 SEC ADJUSTMENT	4	.032 MHz			22.6 mm		0	CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T18		Not Qualified	YES	e0
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
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
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
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
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
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
DS1642-150	Maxim Integrated		COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL						5	IN-LINE	DIP24,.6	N		70 Cel	0 Cel	Tin/Lead (Sn/Pb)	DUAL												CMOS		SECONDS	5 V	Timer or RTC		2.54 mm	R-PDIP-T24		Not Qualified	NO	e0
DS1693	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS/MUXED BUS	4 V			16		3/5	IN-LINE	DIP28,.6	Y	2.7 V	70 Cel	0 Cel	TIN LEAD	DUAL	9.398 mm		15.24 mm	CAN ALSO OPERATE WITH 5V SUPPLY	8	.032 MHz			38.862 mm		1	CMOS		SECONDS	3 V	Timer or RTC		2.54 mm	R-PDIP-T28	1	Not Qualified	NO	e0
DS1693+	Maxim Integrated	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS/MUXED BUS	4 V			16			IN-LINE			2.7 V	70 Cel	0 Cel	MATTE TIN	DUAL	9.398 mm		15.24 mm	CAN ALSO OPERATE WITH 5V SUPPLY	8	.032 MHz			38.862 mm		1	CMOS			3 V			2.54 mm	R-PDIP-T28		Not Qualified		e3
DS1746-70+	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	N	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	Timers or RTCs		2.54 mm	R-PDIP-T32	1	Not Qualified	NO	e3
HS1-82C54RH-8	Renesas Electronics	TIMER, PROGRAMMABLE	MILITARY	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	PARALLEL, DIRECT ADDRESS	5.5 V		MIL-PRF-38535 Class Q	16			IN-LINE			4.5 V	125 Cel	-55 Cel	GOLD	DUAL	5.72 mm		15.24 mm		8					100k Rad(Si)	3	CMOS			5 V			2.54 mm	R-CDIP-T24		Not Qualified		e4
MC68B40P	Motorola	TIMER, PROGRAMMABLE	COMMERCIAL	THROUGH-HOLE	28	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, DIRECT ADDRESS	5.25 V			16			IN-LINE	DIP28,.6	Y	4.75 V	70 Cel	0 Cel	TIN LEAD	DUAL	5.08 mm		15.24 mm		8	2 MHz			36.83 mm		3				5 V		6800	2.54 mm	R-PDIP-T28		Not Qualified		e0
CDP68HC68T1E	Renesas Electronics	TIMER, REAL TIME CLOCK	INDUSTRIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	SERIAL, 3-WIRE	6 V	8			.002048 MHz	3.3/5	IN-LINE	DIP16,.3	Y	3 V	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL		32				2.1 MHz					1	CMOS	1.2 mA	SECONDS	5 V	Timer or RTC	CDP6805D2	2.54 mm	R-PDIP-T16		Not Qualified	YES	e0
D8254	Intel	TIMER, PROGRAMMABLE	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	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	170 mA		5 V				R-GDIP-T24		Not Qualified		e0
D8254-2	Rochester Electronics	TIMER, PROGRAMMABLE	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	PARALLEL, DIRECT ADDRESS	5.5 V			16			IN-LINE			4.5 V	70 Cel	0 Cel		DUAL				6 PROGRAMMABLE MODES	8		NOT SPECIFIED	NOT SPECIFIED			3	NMOS			5 V				R-GDIP-T24		Not Qualified
MC146818P	NXP Semiconductors	TIMER, REAL TIME CLOCK	COMMERCIAL	THROUGH-HOLE	24	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	PARALLEL, MUXED BUS	5.5 V	8			.032768 MHz		IN-LINE			3 V	70 Cel	0 Cel	TIN LEAD	DUAL	5.08 mm	50	15.24 mm		8	4.2 MHz			31.75 mm		1	CMOS	3 mA		5 V		8085; 8048; 8049; MC3870; MC6805; MC146805; S2000; 8021	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.