COMMERCIAL Digital Counters 54

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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	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	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
SN74AS867DWE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	24	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1		TTL	8	YES	TUBE	5		50 pF	SMALL OUTLINE	SOP24,.4	SYNCHRONOUS	15 ns		Counters	1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	NICKEL PALLADIUM GOLD	DUAL	50 MHz	R-PDSO-G24	1	5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	195 mA	TCO OUTPUT	e4	30	260	15.4 mm	AS
SN74LS163ANE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	25000000 Hz	TTL	4		TUBE	5	5	15 pF	IN-LINE	DIP16,.3	SYNCHRONOUS	27 ns	8 Amp	Counter	2.54 mm	70 Cel	UP		POSITIVE EDGE	NICKEL PALLADIUM GOLD	DUAL	25 MHz	R-PDIP-T16		5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	32 mA	TCO OUTPUT	e4			19.305 mm	LS
SN74LS191DE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	20000000 Hz	TTL	4		TUBE	5	5	15 pF	SMALL OUTLINE	SOP16,.25	SYNCHRONOUS	36 ns	16 Amp	Counters	1.27 mm	70 Cel	BIDIRECTIONAL		POSITIVE EDGE	NICKEL PALLADIUM GOLD	DUAL	20 MHz	R-PDSO-G16	1	5.25 V	1.75 mm	3.9 mm	Not Qualified	4.75 V	35 mA	TCO OUTPUT	e4	30	260	9.9 mm	LS
SN74LS293NE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	14	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	2	32000000 Hz	TTL	3	NO	TUBE	5	5	15 pF	IN-LINE	DIP14,.3	ASYNCHRONOUS	51 ns	16 Amp	Counters	2.54 mm	70 Cel	UP		NEGATIVE EDGE	NICKEL PALLADIUM GOLD	DUAL	16 MHz	R-PDIP-T14	1	5.25 V	5.08 mm	6.35 mm	Not Qualified	4.75 V	39 mA	DIVIDE BY 2 AND DIVIDE BY 8 FUNCTIONS	e4			19.3 mm	LS
SN74LS590NE4	Texas Instruments	BINARY COUNTER	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	20000000 Hz	TTL	8	NO	TUBE	5	5	45 pF	IN-LINE	DIP16,.3	ASYNCHRONOUS	33 ns	24 Amp	Counters	2.54 mm	70 Cel	UP	3-STATE	POSITIVE EDGE	NICKEL PALLADIUM GOLD	DUAL	35 MHz	R-PDIP-T16		5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	65 mA	TCO OUTPUT; REGISTERED OUTPUTS	e4			19.305 mm	LS
SN74LS390NE4	Texas Instruments	DECADE COUNTER	COMMERCIAL	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	2	25000000 Hz	TTL	3		TUBE	5	5	15 pF	IN-LINE	DIP16,.3	ASYNCHRONOUS	60 ns	8 Amp	Counters	2.54 mm	70 Cel	UP		NEGATIVE EDGE	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	25 MHz	R-PDIP-T16	1	5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	26 mA	DIVIDE BY 2 AND DIVIDE BY 5 FUNCTIONS	e4	NOT SPECIFIED	260	19.305 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.