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	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
SN54ALS568J	Texas Instruments	DECADE 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
SN74ALS561AJ	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	UP	3-STATE		0 Cel		DUAL		R-XDIP-T20				Not Qualified
SN54HC590AFKR	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		8	YES		5		150 pF	CHIP CARRIER		ASYNCHRONOUS	447 ns			1.27 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		QUAD	24 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V		RCO OUTPUT; REGISTERED OUTPUTS				8.89 mm	HC/UH
SN74HC696N	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
SN54LS591FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		TTL			NO					CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS			Counters	1.27 mm	125 Cel	UP	3-STATE		-55 Cel		QUAD		S-XQCC-N20				Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74HC160FH	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	UP			-40 Cel		QUAD		S-XQCC-N20				Not Qualified
SN54HC590AFK-00	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		8	YES		5		50 pF	CHIP CARRIER		ASYNCHRONOUS	42 ns			1.27 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		QUAD	13 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V		TCO OUTPUT; REGISTERED OUTPUTS				8.89 mm	HC/UH
SN74HC692N1	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
SN54HC190FK	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1	14000000 Hz	CMOS			YES			2/6	50 pF	CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS		5.2 Amp	Counters	1.27 mm	125 Cel	BIDIRECTIONAL			-55 Cel		QUAD		S-XQCC-N20				Not Qualified
SN54ALS160AFH-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	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
SN74ALS569NP3	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
SN54HC693FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			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
SN74ALS568J	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	BIDIRECTIONAL	3-STATE		0 Cel		DUAL		R-XDIP-T20				Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74HC192FN3	Texas Instruments	DECADE 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
SN74LS698FN3	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	BIDIRECTIONAL	3-STATE		0 Cel		QUAD		S-PQCC-J20									NOT SPECIFIED	NOT SPECIFIED
SN54LS593FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		8	YES		5		45 pF	CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS	39 ns		Counters	1.27 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		QUAD	35 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	80 mA	TCO OUTPUT; REGISTERED INPUTS; MULTIPLEXED I/O		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74LV163AFK	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						8.89 mm	LV/LV-A/LVX/H
SN54F569FK-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	3-STATE	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; CLOCKED CARRY OUTPUT				8.89 mm	F/FAST
SN54AS163FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	65000000 Hz	TTL		4	YES		5	5	50 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	14 ns	20 Amp	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
SN54AS163FKR	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	14 ns			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				8.89 mm	AS
SN74F568D	Texas Instruments	DECADE COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			YES		5	5		SMALL OUTLINE	SOP20,.4	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel		DUAL		R-PDSO-G20				Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN54S168FK	Texas Instruments	DECADE 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
SN74LS161AFN3	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	UP			0 Cel		QUAD		S-PQCC-J20
SN74HC191FN3	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
SN54ALS560AFH	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	UP	3-STATE		-55 Cel		QUAD		S-XQCC-N20				Not Qualified
SN54HC4020FKR	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS		4	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		OUTPUTS FROM 12 STAGES AVAILABLE				8.89 mm	HC/UH
SN74ALS561JP4	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	UP	3-STATE		0 Cel		DUAL		R-XDIP-T20
5962-89946012X	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS	MIL-STD-883	4	YES		4.5			CHIP CARRIER		SYNCHRONOUS	325 ns				125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD		S-CQCC-N20	6 V			Not Qualified	2 V							HC/UH
SN54F161AFK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	75000000 Hz	TTL		4	YES		5	5	50 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	11.5 ns	20 Amp	Counters	1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	75 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	55 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	F/FAST
SN74LS190FN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5	5	15 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS	36 ns		Counters	1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	0 Cel		QUAD	20 MHz	S-PQCC-J20	5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	35 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
SN74LS699J4	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
SN74LS693N3	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	UP	3-STATE		0 Cel		DUAL		R-PDIP-T20									NOT SPECIFIED	NOT SPECIFIED
SN74ALS569ADWP3	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			YES		5	5		SMALL OUTLINE	SOP20,.4	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel		DUAL		R-PDSO-G20									NOT SPECIFIED	NOT SPECIFIED
SN74AS160FN-00	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5		50 pF	CHIP CARRIER		SYNCHRONOUS	6 ns			1.27 mm	70 Cel	UP		POSITIVE EDGE	0 Cel		QUAD		S-PQCC-J20	5.5 V	4.57 mm	8.9662 mm	Not Qualified	4.5 V		TCO OUTPUT				8.9662 mm	AS
SN74ALS193FN-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	BIDIRECTIONAL		POSITIVE EDGE	0 Cel		QUAD	30 MHz	S-PQCC-J20	5.5 V	4.57 mm	8.9662 mm	Not Qualified	4.5 V	22 mA	TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK				8.9662 mm	ALS
SN74ALS568AN-10	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL		4	YES		5		50 pF	IN-LINE		SYNCHRONOUS	16 ns			2.54 mm	70 Cel	BIDIRECTIONAL	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	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT				24.325 mm	ALS
SN74F568D3	Texas Instruments	DECADE COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			YES		5	5		SMALL OUTLINE	SOP20,.4	SYNCHRONOUS			Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE		0 Cel		DUAL		R-PDSO-G20									NOT SPECIFIED	NOT SPECIFIED
SN74S168FN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5	5	15 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS	15 ns		Counters	1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	0 Cel		QUAD	40 MHz	S-PQCC-J20	5.25 V	4.57 mm	8.9662 mm	Not Qualified	4.75 V	160 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	S
SN54HC590FK	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	3-STATE		-55 Cel		QUAD		S-XQCC-N20				Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN54HC699J	Texas Instruments	BINARY COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC	NO	1		CMOS			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
SN54HC4061FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	19000000 Hz	CMOS		14	NO		5		50 pF	CHIP CARRIER	LCC20,.35SQ	ASYNCHRONOUS	735 ns	5.2 Amp	Counters	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				NOT SPECIFIED	NOT SPECIFIED	8.89 mm	HC/UH
SN74HC191FN	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
SN54LS690J	Texas Instruments	DECADE COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, METAL-SEALED COFIRED	NO	1		TTL		4	YES		5		45 pF	IN-LINE	DIP20,.3	SYNCHRONOUS	25 ns		Counters	2.54 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		DUAL		R-CDIP-T20	5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS		NOT SPECIFIED	NOT SPECIFIED	24.195 mm	LS
SN54HC193FKR	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	375 ns			1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	16 MHz	S-CQCC-N20	6 V	2.03 mm	8.89 mm	Not Qualified	2 V		SEPARATE UP/DOWN CLOCK				8.89 mm	HC/UH
SN74AS163FN-00	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5		50 pF	CHIP CARRIER		SYNCHRONOUS	6 ns			1.27 mm	70 Cel	UP		POSITIVE EDGE	0 Cel		QUAD		S-PQCC-J20	5.5 V	4.57 mm	8.9662 mm	Not Qualified	4.5 V		TCO OUTPUT				8.9662 mm	AS
SN74LS590FN	Texas Instruments	BINARY COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		8	NO		5	5	45 pF	CHIP CARRIER	LDCC20,.4SQ	ASYNCHRONOUS	33 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	65 mA	TCO OUTPUT; REGISTERED OUTPUTS		NOT SPECIFIED	NOT SPECIFIED	8.9662 mm	LS
5962-86840012A	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	20000000 Hz	TTL	MIL-STD-883	4		TUBE	5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	26 ns	8 Amp	Counter	1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel	TIN LEAD	QUAD	20 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Qualified	4.5 V	22 mA	TCO OUTPUT	e0			8.89 mm	ALS
SN54AS169FK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	65000000 Hz	TTL		4	YES		5	5	50 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	14 ns	20 Amp	Counters	1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	65 MHz	S-CQCC-N20	5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	63 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	AS

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.