20 Digital Counters 1,712

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Part	Manufacturer	Logic IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	No. of Functions	Maximum Frequency At Nominal Supply	Technology	Screening Level	No. of Bits	Load or Preset Input	Nominal Supply Voltage / Vsup (V)	Power Supplies (V)	Load Capacitance (CL)	Package Style (Meter)	Package Equivalence Code	Operation Mode	Propagation Delay (tpd)	Maximum I (ol)	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Count Direction	Output Characteristics	Trigger Type	Minimum Operating Temperature	Terminal Position	Minimum fmax	JESD-30 Code	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width	Qualification	Minimum Supply Voltage (Vsup)	Maximum Power Supply Current (ICC)	Additional Features	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	Family
SN74HC696NP3	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		CMOS			NO	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel	DUAL		R-PDIP-T20								NOT SPECIFIED	NOT SPECIFIED
SN54ALS161BFKR	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES	5		50 pF	CHIP CARRIER		SYNCHRONOUS	25 ns			1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel	QUAD	22 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	21 mA	TCO OUTPUT			8.89 mm	ALS
SN74ALS569ANP1	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL			YES	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel	DUAL		R-PDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74HC698N	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		CMOS			NO	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel	DUAL		R-PDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74LS699J	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	1		TTL		4	YES	5		45 pF	IN-LINE	DIP20,.3	SYNCHRONOUS	25 ns		Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel	DUAL		R-GDIP-T20	5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS	NOT SPECIFIED	NOT SPECIFIED	24.195 mm	LS
SN54ALS569AJ-00	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	1		TTL		4	YES	5		50 pF	IN-LINE		SYNCHRONOUS	18 ns			2.54 mm	125 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	-55 Cel	DUAL	25 MHz	R-GDIP-T20	5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT			24.195 mm	ALS
SN74LS593NP1	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL			NO				IN-LINE	DIP20,.3	ASYNCHRONOUS			Counters	2.54 mm	70 Cel	UP	3-STATE		0 Cel	DUAL		R-PDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74HC163FN3	Texas Instruments	BINARY COUNTER	INDUSTRIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		CMOS			YES		2/6		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	85 Cel	UP			-40 Cel	QUAD		S-PQCC-J20								NOT SPECIFIED	NOT SPECIFIED
SN74HC692J	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		CMOS			YES	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel	DUAL		R-XDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74HC191FH4	Texas Instruments	BINARY COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES		2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	85 Cel	BIDIRECTIONAL			-40 Cel	QUAD		S-XQCC-N20
SN54HC4020FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			NO		2/6		CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS			Counters	1.27 mm	125 Cel	UP			-55 Cel	QUAD		S-XQCC-N20				Not Qualified
SN74ALS560AJP4	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL			YES	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	UP	3-STATE		0 Cel	DUAL		R-XDIP-T20
SN74HC161FHP4	Texas Instruments	BINARY COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES		2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	85 Cel	UP			-40 Cel	QUAD		S-XQCC-N20								NOT SPECIFIED	NOT SPECIFIED
SN54HC393FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	2		CMOS			NO		2/6		CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS			Counters	1.27 mm	125 Cel	UP			-55 Cel	QUAD		S-XQCC-N20				Not Qualified
SN74AS169AFN	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	75000000 Hz	TTL			YES	5	5		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS		20 Amp	Counters	1.27 mm	70 Cel	BIDIRECTIONAL			0 Cel	QUAD		S-PQCC-J20				Not Qualified		63 mA
SN54F169FK-00	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES	5			CHIP CARRIER		SYNCHRONOUS	11.5 ns			1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel	QUAD	115 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V		TCO OUTPUT			8.89 mm	F/FAST
SN54HC4060FKR	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	HQCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		14	YES	5		50 pF	CHIP CARRIER, HEAT SINK/SLUG		ASYNCHRONOUS	735 ns			1.27 mm	125 Cel	UP		NEGATIVE EDGE	-55 Cel	QUAD	22 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V		OUTPUTS FROM 10 STAGES AVAILABLE; BUILT-IN OSCILLATOR			8.89 mm	HC/UH
SN74F568N	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	90000000 Hz	TTL		4	YES	5	5	50 pF	IN-LINE	DIP20,.3	SYNCHRONOUS	13 ns	24 Amp	Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel	DUAL	90 MHz	R-PDIP-T20	5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	67 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT	NOT SPECIFIED	NOT SPECIFIED	24.325 mm	F/FAST
SN74HC192FH4	Texas Instruments	DECADE COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES		2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	85 Cel	BIDIRECTIONAL			-40 Cel	QUAD		S-XQCC-N20
SN54AS161FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1	65000000 Hz	TTL			YES	5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS		20 Amp	Counters	1.27 mm	125 Cel	UP			-55 Cel	QUAD		S-XQCC-N20				Not Qualified		53 mA
SN74LS69FN3	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		TTL			NO				CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel	QUAD		S-PQCC-J20								NOT SPECIFIED	NOT SPECIFIED
SN74HC696NP1	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		CMOS			NO	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel	DUAL		R-PDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74HC490FN	Texas Instruments	DECADE COUNTER	INDUSTRIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		CMOS			NO				CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	85 Cel	UP			-40 Cel	QUAD		S-PQCC-J20				Not Qualified
SN74HC698J	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		CMOS			NO	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel	DUAL		R-XDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN54ALS568AFH	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		TTL			YES	5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	125 Cel	BIDIRECTIONAL	3-STATE		-55 Cel	QUAD		S-XQCC-N20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74LS193FN	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES	5	5	15 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS	47 ns		Counters	1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	0 Cel	QUAD	25 MHz	S-PQCC-J20	5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	34 mA	TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK	NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
SN74ALS168BFN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			YES	5	5		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL			0 Cel	QUAD		S-PQCC-J20				Not Qualified
SN54ALS568AFH-00	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES	5		50 pF	CHIP CARRIER		SYNCHRONOUS	18 ns			1.27 mm	125 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	-55 Cel	QUAD	18 MHz	S-CQCC-N20	5.5 V	2.54 mm	8.89 mm	Not Qualified	4.5 V	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT			8.89 mm	ALS
SN54LS293FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	2		TTL		3	NO	5	5		CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS	51 ns		Counters	1.27 mm	125 Cel	UP		NEGATIVE EDGE	-55 Cel	QUAD	16 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	15 mA	DIVIDE BY 2 AND DIVIDE BY 8 FUNCTIONS	NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74ALS163AFN-00	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES	5		50 pF	CHIP CARRIER		SYNCHRONOUS	17 ns			1.27 mm	70 Cel	UP		POSITIVE EDGE	0 Cel	QUAD	30 MHz	S-PQCC-J20	5.5 V	4.57 mm	8.9662 mm	Not Qualified	4.5 V	21 mA	TCO OUTPUT			8.9662 mm	ALS
SN74F569DW	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	90000000 Hz	TTL		4	YES	5	5	50 pF	SMALL OUTLINE	SOP20,.4	SYNCHRONOUS	13 ns	24 Amp	Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel	DUAL	90 MHz	R-PDSO-G20	5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	67 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT	NOT SPECIFIED	NOT SPECIFIED	12.8 mm	F/FAST
SN74ALS561N3	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL			YES	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	UP	3-STATE		0 Cel	DUAL		R-PDIP-T20
SN74ALS568AFN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			YES	5	5		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel	QUAD		S-PQCC-J20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74LS196FN3	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			NO	5	5		CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel	QUAD		S-PQCC-J20
SN74LS691FN	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES	5		45 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS	25 ns		Counters	1.27 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel	QUAD		S-PQCC-J20	5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS	NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
SN54HC4040FKR	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		12	YES	5		50 pF	CHIP CARRIER		ASYNCHRONOUS	225 ns			1.27 mm	125 Cel	UP		NEGATIVE EDGE	-55 Cel	QUAD	22 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V					8.89 mm	HC/UH
SN74LV161AFK	Texas Instruments	BINARY COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		4	YES				CHIP CARRIER		SYNCHRONOUS				1.27 mm	85 Cel	UP		POSITIVE EDGE	-40 Cel	QUAD		S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	2 V		TCO OUTPUT			8.89 mm	LV/LV-A/LVX/H
SN54HC4040FK-00	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		12	YES	5		50 pF	CHIP CARRIER		ASYNCHRONOUS	45 ns			1.27 mm	125 Cel	UP		NEGATIVE EDGE	-55 Cel	QUAD	19 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V					8.89 mm	HC/UH
SN74LS697JP4	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL			YES				IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel	DUAL		R-XDIP-T20								NOT SPECIFIED	NOT SPECIFIED
SN74LS697NP3	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL			YES				IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel	DUAL		R-PDIP-T20								NOT SPECIFIED	NOT SPECIFIED
SN74ALS569AJ	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL			YES	5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel	DUAL		R-XDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN54AS160FK	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES	5		50 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	14 ns		Counters	1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel	QUAD	65 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	53 mA	TCO OUTPUT	NOT SPECIFIED	NOT SPECIFIED	8.89 mm	AS
5962-01-352-0777	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL	38535Q/M;38534H;883B		YES				IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	125 Cel	UP	3-STATE		-55 Cel	DUAL		R-XDIP-T20				Not Qualified				NOT SPECIFIED	NOT SPECIFIED
SN74LS690DWR	Texas Instruments	DECADE COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		4	YES	5		45 pF	SMALL OUTLINE		SYNCHRONOUS	25 ns			1.27 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel	DUAL		R-PDSO-G20	5.25 V	2.65 mm	7.5 mm	Not Qualified	4.75 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS			12.8 mm	LS
SN54ALS169FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		TTL			YES	5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	125 Cel	BIDIRECTIONAL			-55 Cel	QUAD		S-XQCC-N20				Not Qualified
SN74ALS168AFN3	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			YES	5	5		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL			0 Cel	QUAD		S-PQCC-J20
SN54LS591FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		8	NO	5		45 pF	CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS	42 ns		Counters	1.27 mm	125 Cel	UP	OPEN-COLLECTOR	POSITIVE EDGE	-55 Cel	QUAD	35 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	65 mA	TCO OUTPUT; COUNT ENABLE INPUT	NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74ALS163AFN3	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	30000000 Hz	TTL			YES	5	5		CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel	QUAD		S-PQCC-J20

Digital Counters

Digital counters are electronic circuits that can be used to count and keep track of the number of events or occurrences in a digital system. They are commonly used in digital systems to generate timing signals, to control sequencing, and to implement digital control functions.

Digital counters can be designed using various technologies, including transistor-transistor logic (TTL), complementary metal-oxide-semiconductor (CMOS), and field-programmable gate arrays (FPGAs). They can also be designed using various types of flip-flops, such as D flip-flops, JK flip-flops, and T flip-flops.

Digital counters can be classified into two main types: synchronous counters and asynchronous counters. Synchronous counters use a common clock signal to synchronize the operation of all the flip-flops in the counter. Asynchronous counters, on the other hand, do not use a common clock signal and rely on the propagation delay of the flip-flops to sequence their operation.

Digital counters can also be classified based on their counting sequence. They can count up, down, or both up and down, depending on the application. Up counters increment the count each time an input pulse is received, while down counters decrement the count each time an input pulse is received. Up-down counters can count both up and down, depending on the direction of the input signal.

Digital counters can be used in various applications, including frequency division, time delay generation, event counting, and sequence control. They can be used to generate timing signals for clocking digital circuits, to control the sequencing of operations in a digital system, and to implement digital control functions, such as shift registers and sequence generators.