DECADE COUNTER Digital Counters 53

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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	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
CD4522BM96E4	Texas Instruments	DECADE COUNTER	MILITARY	GULL WING	16	SOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	1500000 Hz	CMOS	4	YES	TR	5	5/15	50 pF	SMALL OUTLINE	SOP16,.25	SYNCHRONOUS	1100 ns		Counters	1.27 mm	125 Cel	DOWN	POSITIVE EDGE	-55 Cel		DUAL	4 MHz	R-PDSO-G16		18 V	1.75 mm	3.9 mm	Not Qualified	3 V		DUMMY VAL		NOT SPECIFIED	NOT SPECIFIED	9.9 mm	4000/14000/40000
CD74HC390EE4	Texas Instruments	DECADE COUNTER	MILITARY	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	2	20000000 Hz	CMOS	4		TUBE	4.5	2/6	50 pF	IN-LINE	DIP16,.3	ASYNCHRONOUS	550 ns	5.2 Amp	Counters	2.54 mm	125 Cel	UP	NEGATIVE EDGE	-55 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	24 MHz	R-PDIP-T16		6 V	5.08 mm	7.62 mm	Not Qualified	2 V	.08 mA	DIVIDE BY 2 AND DIVIDE BY 5 FUNCTIONS	e4	NOT SPECIFIED	NOT SPECIFIED	19.305 mm	HC/UH
CD4518BEE4	Texas Instruments	DECADE COUNTER	MILITARY	THROUGH-HOLE	16	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	2	1500000 Hz	CMOS	4		TUBE	5	5/15	50 pF	IN-LINE	DIP16,.3	SYNCHRONOUS	560 ns	1.5 Amp	Counters	2.54 mm	125 Cel	UP	POSITIVE EDGE	-55 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	4 MHz	R-PDIP-T16		18 V	5.08 mm	7.62 mm	Not Qualified	3 V	.03 mA	GATED CLOCK; SCHMITT TRIGGER ON CLOCK INPUT	e4	NOT SPECIFIED	NOT SPECIFIED	19.305 mm	4000/14000/40000
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	0 Cel	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
CD4522BPWE4	Texas Instruments	DECADE COUNTER	MILITARY	GULL WING	16	TSSOP	RECTANGULAR	PLASTIC/EPOXY	YES	1	1500000 Hz	CMOS	4		TUBE	5	5/15	50 pF	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	SYNCHRONOUS	1100 ns	1.5 Amp	Counters	.65 mm	125 Cel	DOWN	POSITIVE EDGE	-55 Cel	NICKEL PALLADIUM GOLD	DUAL	4 MHz	R-PDSO-G16	1	18 V	1.2 mm	4.4 mm	Not Qualified	3 V	.03 mA	DUMMY VAL	e4	30	260	5 mm	4000/14000/40000

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.