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
SN74ALS560J	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					Not Qualified
SN54LS593FH	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
SN74ALS569AFN	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	3-STATE		0 Cel		QUAD		S-PQCC-J20					Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74LS160AFN3	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	UP			0 Cel		QUAD		S-PQCC-J20
SN74ALS560N1	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	UP	3-STATE		0 Cel		DUAL		R-PDIP-T20					Not Qualified
SN74LS691FN3	Texas Instruments	BINARY 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	3-STATE		0 Cel		QUAD		S-PQCC-J20										NOT SPECIFIED	NOT SPECIFIED
SN54ALS561AFH-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	21 ns			1.27 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		QUAD	25 MHz	S-CQCC-N20		5.5 V	2.54 mm	8.89 mm	Not Qualified	4.5 V	33 mA	TCO OUTPUT; COUNT ENABLE INPUTS				8.89 mm	ALS
SN54HC690FH	Texas Instruments	DECADE 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
SN54HC490FK-00	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	2		CMOS		4	YES		5		50 pF	CHIP CARRIER		ASYNCHRONOUS	71 ns			1.27 mm	125 Cel	UP		NEGATIVE EDGE	-55 Cel		QUAD	21 MHz	S-CQCC-N20		6 V	2.03 mm	8.89 mm	Not Qualified	2 V						8.89 mm	HC/UH
SN74LS593NE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	20	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1		TTL		8	YES	TUBE	5		45 pF	IN-LINE	DIP20,.3	ASYNCHRONOUS	39 ns		Counters	2.54 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel	NICKEL PALLADIUM GOLD	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			25.4 mm	LS
SN54ALS560AFH-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	21 ns			1.27 mm	125 Cel	UP	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	33 mA	TCO OUTPUT; COUNT ENABLE INPUTS				8.89 mm	ALS
SN74ALS568ADW	Texas Instruments	DECADE COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		4	YES		5	5	50 pF	SMALL OUTLINE	SOP20,.4	SYNCHRONOUS	16 ns		Counters	1.27 mm	70 Cel	BIDIRECTIONAL	3-STATE	POSITIVE EDGE	0 Cel		DUAL	20 MHz	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT		NOT SPECIFIED	NOT SPECIFIED	12.8 mm	ALS
5962-01-376-0016	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 Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74HC699N1	Texas Instruments	BINARY 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
SN74HC691NP3	Texas Instruments	BINARY 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 SPECIFIED	NOT SPECIFIED
SN74LS693N1	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 Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74HC697NP3	Texas Instruments	BINARY 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 SPECIFIED	NOT SPECIFIED
5962-87724012A	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		CMOS	MIL-STD-883	4	YES		5	2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	375 ns		Counter	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		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	HC/UH
SN74LS593DWRG4	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL		8	YES	TR	5			SMALL OUTLINE	SOP20,.4	ASYNCHRONOUS	39 ns		Counters	1.27 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	0 Cel	NICKEL PALLADIUM GOLD	DUAL	35 MHz	R-PDSO-G20	1	5.25 V	2.65 mm	7.5 mm	Not Qualified	4.75 V		REGISTERED INPUTS	e4	30	260	12.8 mm	LS
SN54LS169BFK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1	20000000 Hz	TTL		4	YES		5	5	45 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	25 ns	12 Amp	Counters	1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	20 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	45 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74ALS191FN3	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
SN54ALS168AFH	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			-55 Cel		QUAD		S-XQCC-N20					Not Qualified
SN54ALS568AJ	Texas Instruments	DECADE COUNTER	MILITARY	THROUGH-HOLE	20	DIP	RECTANGULAR	CERAMIC, GLASS-SEALED	NO	1		TTL		4	YES		5	5	50 pF	IN-LINE	DIP20,.3	SYNCHRONOUS	19 ns		Counters	2.54 mm	125 Cel	BIDIRECTIONAL	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	32 mA	TCO OUTPUT; CLOCKED CARRY OUTPUT		NOT SPECIFIED	NOT SPECIFIED	24.195 mm	ALS
SN74HC4022FNP3	Texas Instruments	DIVIDE BY 8 COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1	25000000 Hz	CMOS			NO		5	5	50 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS			Counters	1.27 mm	70 Cel	UP			0 Cel		QUAD		S-PQCC-J20										NOT SPECIFIED	NOT SPECIFIED
5962-86876012A	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	UNSPECIFIED	YES	1		TTL	MIL-STD-883	4	YES		5			CHIP CARRIER		SYNCHRONOUS	38 ns				125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	15 MHz	S-XQCC-N20		5.5 V			Not Qualified	4.5 V							LS
SN74LS593DW3	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	20	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL			NO					SMALL OUTLINE	SOP20,.4	ASYNCHRONOUS			Counters	1.27 mm	70 Cel	UP	3-STATE		0 Cel		DUAL		R-PDSO-G20										NOT SPECIFIED	NOT SPECIFIED
SN54LS163AFK	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	27 ns		Counters	1.27 mm	125 Cel	UP		POSITIVE EDGE	-55 Cel		QUAD	25 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	32 mA	TCO OUTPUT		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN74ALS568JP4	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 SPECIFIED	NOT SPECIFIED
SN74LS696J4	Texas Instruments	DECADE 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
SN74ALS190FN-00	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5		50 pF	CHIP CARRIER		SYNCHRONOUS	18 ns			1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	0 Cel		QUAD	25 MHz	S-PQCC-J20		5.5 V	4.57 mm	8.9662 mm	Not Qualified	4.5 V	22 mA	TCO OUTPUT				8.9662 mm	ALS
SN74ALS569AJP4	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 SPECIFIED	NOT SPECIFIED
SN54LS691J	Texas Instruments	BINARY 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
SN54LS690FK	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES		5		45 pF	CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS	25 ns		Counters	1.27 mm	125 Cel	UP	3-STATE	POSITIVE EDGE	-55 Cel		QUAD		S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	70 mA	REGISTER/COUNTER OUTPUT SELECT; TCO OUTPUT; REGISTERED OUTPUTS		NOT SPECIFIED	NOT SPECIFIED	8.89 mm	LS
SN54HC592FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			NO		5	5		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	125 Cel	UP	3-STATE		-55 Cel		QUAD		S-XQCC-N20					Not Qualified					NOT SPECIFIED	NOT SPECIFIED
SN74LS692N	Texas Instruments	DECADE 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
SN74LS293FN3	Texas Instruments	BINARY 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
SN74S162FN	Texas Instruments	DECADE COUNTER	COMMERCIAL	J BEND	20	QCCJ	SQUARE	PLASTIC/EPOXY	YES	1		TTL		4	YES		5		15 pF	CHIP CARRIER	LDCC20,.4SQ	SYNCHRONOUS	15 ns		Counters	1.27 mm	70 Cel	UP		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
SN74ALS568N	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
SN54HC191FH	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			YES			2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	125 Cel	BIDIRECTIONAL			-55 Cel		QUAD		S-XQCC-N20					Not Qualified
SN74LS691DW	Texas Instruments	BINARY 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
SN54ALS193AFK	Texas Instruments	BINARY COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC, METAL-SEALED COFIRED	YES	1		TTL		4	YES		5			CHIP CARRIER		SYNCHRONOUS	27 ns			1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	25 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V		TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK				8.89 mm	ALS
SN74ALS568ADW3	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
SN74LS697FN3	Texas Instruments	BINARY 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
SN74S169FN	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	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
SN54HC691J	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
SN74LS693J4	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	UP	3-STATE		0 Cel		DUAL		R-XDIP-T20										NOT SPECIFIED	NOT SPECIFIED
SN54HC4017FH	Texas Instruments	DECADE COUNTER	MILITARY	NO LEAD	20	QCCN	SQUARE	CERAMIC	YES	1		CMOS			NO			2/6		CHIP CARRIER	LCC20,.35SQ	SYNCHRONOUS			Counters	1.27 mm	125 Cel	UP			-55 Cel		QUAD		S-XQCC-N20					Not Qualified
SN54LS191FK	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	36 ns		Counters	1.27 mm	125 Cel	BIDIRECTIONAL		POSITIVE EDGE	-55 Cel		QUAD	20 MHz	S-CQCC-N20		5.5 V	2.03 mm	8.89 mm	Not Qualified	4.5 V	35 mA	TCO OUTPUT				8.89 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.