COMMERCIAL EXTENDED Digital Counters 103

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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	No. of Bits	Load or Preset Input	Nominal Supply Voltage / Vsup (V)	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Operation Mode	Propagation Delay (tpd)	Maximum I (ol)	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Count Direction	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	Length	Family
HD74LS193RP	Renesas Electronics	BINARY COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	47 ns			1.27 mm	75 Cel	BIDIRECTIONAL	POSITIVE EDGE	-20 Cel		DUAL	25 MHz	R-PDSO-G16			1.75 mm	3.95 mm	Not Qualified			TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK		9.9 mm	LS
HD74LS163AP	Renesas Electronics	BINARY COUNTER	COMMERCIAL EXTENDED	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	25000000 Hz	TTL	4	YES	5	5	IN-LINE	DIP16,.3	SYNCHRONOUS	27 ns	8 Amp	Counters	2.54 mm	75 Cel	UP	POSITIVE EDGE	-20 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	25 MHz	R-PDIP-T16		5.25 V	5.06 mm	7.62 mm	Not Qualified	4.75 V	32 mA		e4	19.2 mm	LS
HD74LS668FP	Renesas Electronics	DECADE COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	27 ns			1.27 mm	75 Cel	BIDIRECTIONAL	POSITIVE EDGE	-20 Cel		DUAL	25 MHz	R-PDSO-G16			2.2 mm	5.5 mm	Not Qualified					10.06 mm	LS
HD74LS668FP-EL	Renesas Electronics	DECADE COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	27 ns			1.27 mm	75 Cel	BIDIRECTIONAL	POSITIVE EDGE	-20 Cel		DUAL	25 MHz	R-PDSO-G16			2.2 mm	5.5 mm	Not Qualified					10.06 mm	LS
HD74LS668RP-EL	Renesas Electronics	DECADE COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	27 ns			1.27 mm	75 Cel	BIDIRECTIONAL	POSITIVE EDGE	-20 Cel		DUAL	25 MHz	R-PDSO-G16			1.75 mm	3.95 mm	Not Qualified					9.9 mm	LS
HD74LS190FP-E	Renesas Electronics	DECADE COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	36 ns			1.27 mm	75 Cel	BIDIRECTIONAL	POSITIVE EDGE	-20 Cel	TIN BISMUTH	DUAL	20 MHz	R-PDSO-G16	1		2.2 mm	5.5 mm	Not Qualified				e6	10.06 mm	LS
HD74LS162AFP-E	Renesas Electronics	DECADE COUNTER	COMMERCIAL EXTENDED	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	4	YES	5		SMALL OUTLINE		SYNCHRONOUS	27 ns			1.27 mm	75 Cel	UP	POSITIVE EDGE	-20 Cel	TIN BISMUTH	DUAL	25 MHz	R-PDSO-G16	1		2.2 mm	5.5 mm	Not Qualified				e6	10.06 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.