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	Packing Method	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 Finish	Terminal Position	Minimum fmax	JESD-30 Code	Moisture Sensitivity Level (MSL)	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width	Qualification	Minimum Supply Voltage (Vsup)	Maximum Power Supply Current (ICC)	Additional Features	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length	Family
SN74HC193FH4	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
SN74AS162FN3	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			YES					CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel		QUAD		S-PQCC-J20
SN54LS290FK	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	2		TTL		3	YES		5	5		CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS	35 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 5 FUNCTIONS		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74LS697DW	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		4	YES	TUBE	5		45 pF	SMALL OUTLINE	SOP20,.4	SYNCHRONOUS	40 ns	24 Amp	Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel	NICKEL PALLADIUM GOLD	DUAL	20 MHz	R-PDSO-G20	1	5.25 V	2.65 mm	7.5 mm	Not Qualified	4.75 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS	e4	30	260	12.8 mm	LS
SN74LS196FN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		TTL		3	YES		5	5	15 pF	CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS	62 ns		Counters	1.27 mm	70 Cel	UP		NEGATIVE EDGE	0 Cel		QUAD	30 MHz	S-PQCC-J20		5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	27 mA	DIVIDE BY 2 AND DIVIDE BY 5 FUNCTIONS		NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
5962-01-326-6068	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL			YES		5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	125 Cel	BIDIRECTIONAL	3-STATE		-55 Cel		DUAL		R-XDIP-T20					Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74AS161FN	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	UP			0 Cel		QUAD		S-PQCC-J20					Not Qualified		53 mA
SN74LS669FN3	Texas Instruments	BINARY 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 SPECIFIED	NOT SPECIFIED
SN74ALS568N1	Texas Instruments	DECADE 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
SN54S169FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES		5	5	15 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	15 ns		Counters	1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	40 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	160 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	S
SN74LS593N	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	20000000 Hz	TTL		8		TUBE	5		45 pF	IN-LINE	DIP20,.3	ASYNCHRONOUS	39 ns	24 Amp	Counters	2.54 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	20 MHz	R-PDIP-T20		5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	80 mA	TCO OUTPUT; REGISTERED INPUTS; MULTIPLEXED I/O	e4	NOT SPECIFIED	NOT SPECIFIED	25.4 mm	LS
SN74ALS569N	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
SN54ALS561J	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		TTL			YES		5	5		IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	125 Cel	UP	3-STATE		-55 Cel		DUAL		R-XDIP-T20					Not Qualified
SN54HC163FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		4	YES		5		50 pF	CHIP CARRIER		SYNCHRONOUS	325 ns			1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	25 MHz	S-CQCC-N20		6 V	2.03 mm	8.89 mm	Not Qualified	2 V		RCO OUTPUT				8.89 mm	HC/UH
SN54ALS163BFKR	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
SN74LS696FN	Texas Instruments	DECADE 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	BIDIRECTIONAL	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
5962-86824012X	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	UNSPECIFIED	YES	1		CMOS	MIL-STD-883	4	YES		4.5			CHIP CARRIER		SYNCHRONOUS	310 ns				125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD		S-XQCC-N20		6 V			Not Qualified	2 V							HC/UH
SN74HC697FH	Texas Instruments	BINARY COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES		5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	85 Cel	BIDIRECTIONAL	3-STATE		-40 Cel		QUAD		S-XQCC-N20					Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74LS690DW	Texas Instruments	DECADE COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		4	YES		5		45 pF	SMALL OUTLINE	SOP20,.4	SYNCHRONOUS	25 ns		Counters	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		NOT SPECIFIED	NOT SPECIFIED	12.8 mm	LS
SN54HC4017FK-00	Texas Instruments	RING COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		10	YES		5		50 pF	CHIP CARRIER		SYNCHRONOUS	69 ns			1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	20 MHz	S-CQCC-N20		6 V	2.03 mm	8.89 mm	Not Qualified	2 V		JOHNSON COUNTER WITH 10 DECODED OUTPUTS; TCO OUTPUT; GATED CLOCK				8.89 mm	HC/UH
SN74LS390FN3	Texas Instruments		COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		TTL			NO		5	5		CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel		QUAD		S-PQCC-J20
SN74HC393FN	Texas Instruments	BINARY COUNTER	INDUSTRIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		CMOS			NO			2/6		CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	85 Cel	UP			-40 Cel		QUAD		S-PQCC-J20					Not Qualified
SN74ALS569ANP3	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 SPECIFIED	NOT SPECIFIED
SN54ALS163AFH-00	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	20 ns			1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	25 MHz	S-CQCC-N20		5.5 V	2.54 mm	8.89 mm	Not Qualified	4.5 V	21 mA	TCO OUTPUT				8.89 mm	ALS
SN74ALS568ANP3	Texas Instruments	DECADE 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 SPECIFIED	NOT SPECIFIED
SN74HC191FHP4	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
SN54F569J	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	1		TTL		4	YES		5	5		IN-LINE	DIP20,.3	SYNCHRONOUS		20 Amp	Counters	2.54 mm	125 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	-55 Cel		DUAL		R-GDIP-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	24.195 mm	F/FAST
SN74LS490FN3	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		TTL			NO		5	5		CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel		QUAD		S-PQCC-J20										NOT SPECIFIED	NOT SPECIFIED
SN74LS290FN3	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
SN74ALS190FN3	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
SN74LS690NP3	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL			YES					IN-LINE	DIP20,.3	SYNCHRONOUS			Counters	2.54 mm	70 Cel	UP	3-STATE		0 Cel		DUAL		R-PDIP-T20										NOT SPECIFIED	NOT SPECIFIED
SN54ALS560AJ-00	Texas Instruments	DECADE COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	1		TTL		4	YES		5		50 pF	IN-LINE		SYNCHRONOUS	21 ns			2.54 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		DUAL	18 MHz	R-GDIP-T20		5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	33 mA	TCO OUTPUT; COUNT ENABLE INPUTS				24.195 mm	ALS
SN74HC393FN3	Texas Instruments	BINARY COUNTER	INDUSTRIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	2		CMOS			NO			2/6		CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	85 Cel	UP			-40 Cel		QUAD		S-PQCC-J20
SN74LS691DW3	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			YES					SMALL OUTLINE	SOP20,.4	SYNCHRONOUS			Counters	1.27 mm	70 Cel	UP	3-STATE		0 Cel		DUAL		R-PDSO-G20										NOT SPECIFIED	NOT SPECIFIED
SN74ALS568N3	Texas Instruments	DECADE 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 SPECIFIED	NOT SPECIFIED
SN74LS593FN	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		8	YES		5		45 pF	CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS	39 ns		Counters	1.27 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel		QUAD	20 MHz	S-PQCC-J20		5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	80 mA	TCO OUTPUT; REGISTERED INPUTS; MULTIPLEXED I/O		NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
SN54LS592FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		8	YES		5		45 pF	CHIP CARRIER		ASYNCHRONOUS	30 ns			1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	35 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	60 mA	REGISTERED INPUTS				8.89 mm	LS
SN74S196FN3	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL			NO					CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel		QUAD		S-PQCC-J20
SN74F569N	Texas Instruments	BINARY 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
SN74LS693DW3	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			YES					SMALL OUTLINE	SOP20,.4	SYNCHRONOUS			Counters	1.27 mm	70 Cel	UP	3-STATE		0 Cel		DUAL		R-PDSO-G20										NOT SPECIFIED	NOT SPECIFIED
SN74HC193FN	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	BIDIRECTIONAL			-40 Cel		QUAD		S-PQCC-J20					Not Qualified
SN74HC690NP1	Texas Instruments	DECADE COUNTER	INDUSTRIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		CMOS			YES		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
SN74HC190FH	Texas Instruments	DECADE COUNTER	INDUSTRIAL	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES			2/6		CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS			Counters	1.27 mm	85 Cel	BIDIRECTIONAL			-40 Cel		QUAD		S-XQCC-N20					Not Qualified
SN74ALS560AN-10	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL		4	YES		5		50 pF	IN-LINE		SYNCHRONOUS	18 ns			2.54 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel		DUAL	20 MHz	R-PDIP-T20		5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	33 mA	TCO OUTPUT; COUNT ENABLE INPUTS				24.325 mm	ALS
SN54F568FK	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES		5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS		20 Amp	Counters	1.27 mm	125 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	-55 Cel		QUAD		S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	67 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	F/FAST
SN74HC490FN3	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
SN74ALS569ANSR	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		4	YES	TR	5	5		SMALL OUTLINE	SOP20,.3	SYNCHRONOUS	16 ns	24 Amp	Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel		DUAL	30 MHz	R-PDSO-G20		5.5 V	2 mm	5.3 mm	Not Qualified	4.5 V	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT		NOT SPECIFIED	NOT SPECIFIED	12.6 mm	ALS
SN74LS693N	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL		4	YES		5		45 pF	IN-LINE	DIP20,.3	SYNCHRONOUS	25 ns		Counters	2.54 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel		DUAL		R-PDIP-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	24.325 mm	LS

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.