40 Digital Counters 8

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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	Technology	No. of Bits	Load or Preset Input	Nominal Supply Voltage / Vsup (V)	Power Supplies (V)	Load Capacitance (CL)	Package Style (Meter)	Package Equivalence Code	Operation Mode	Propagation Delay (tpd)	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)	Additional Features	JESD-609 Code	Length	Family
MAX74C947N	Analog Devices	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS	16	YES				IN-LINE		ASYNCHRONOUS			2.54 mm	85 Cel	BIDIRECTIONAL	NEGATIVE EDGE	-40 Cel	TIN LEAD	DUAL	2 MHz	R-PDIP-T40		6 V	5.08 mm	15.24 mm	Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT	e0	52.075 mm	CMOS
MAX74C945N	Analog Devices	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS	16	YES				IN-LINE		ASYNCHRONOUS			2.54 mm	85 Cel	BIDIRECTIONAL	NEGATIVE EDGE	-40 Cel	TIN LEAD	DUAL	2 MHz	R-PDIP-T40		6 V	5.08 mm	15.24 mm	Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT	e0	52.075 mm	CMOS
MM74C945C/D	Maxim Integrated	DISPLAY DRIVER COUNTER	COMMERCIAL	NO LEAD	40	DIE	RECTANGULAR	UNSPECIFIED	YES	1	CMOS	16	YES				UNCASED CHIP		ASYNCHRONOUS				70 Cel	BIDIRECTIONAL	NEGATIVE EDGE	0 Cel	TIN LEAD	UPPER	2 MHz	R-XUUC-N40		6 V			Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT	e0		CMOS
MM74C945N	Maxim Integrated	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS	16	YES	5	5	50 pF	IN-LINE	DIP40,.6	ASYNCHRONOUS	800 ns	Counters	2.54 mm	85 Cel	BIDIRECTIONAL	NEGATIVE EDGE	-40 Cel	TIN LEAD	DUAL	2 MHz	R-PDIP-T40	3	6 V	5.08 mm	15.24 mm	Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT; 7 SEGMENT DISPLAY DRIVERS	e0	52.075 mm	CMOS
MM74C947C/D	Maxim Integrated	DISPLAY DRIVER COUNTER	COMMERCIAL	NO LEAD	40	DIE	RECTANGULAR	UNSPECIFIED	YES	1	CMOS	16	YES				UNCASED CHIP		ASYNCHRONOUS				70 Cel	BIDIRECTIONAL	NEGATIVE EDGE	0 Cel	TIN LEAD	UPPER	2 MHz	R-XUUC-N40		6 V			Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT	e0		CMOS
MM74C947N	Maxim Integrated	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	PLASTIC/EPOXY	NO	1	CMOS	16	YES	5	5	50 pF	IN-LINE	DIP40,.6	ASYNCHRONOUS	800 ns	Counters	2.54 mm	85 Cel	BIDIRECTIONAL	NEGATIVE EDGE	-40 Cel	TIN LEAD	DUAL	2 MHz	R-PDIP-T40		6 V	5.08 mm	15.24 mm	Not Qualified	3 V	4 DIGIT COUNTER WITH OUTPUT LATCHES; SCHMITT TRIGGER ON CLOCK INPUT; 7 SEGMENT DISPLAY DRIVERS	e0	52.075 mm	CMOS
MM74C947J	Maxim Integrated	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO		CMOS		YES	5	5		IN-LINE	DIP40,.6			Counters	2.54 mm	85 Cel			-40 Cel	Tin/Lead (Sn/Pb)	DUAL		R-XDIP-T40								e0
MM74C945J	Maxim Integrated	DISPLAY DRIVER COUNTER	INDUSTRIAL	THROUGH-HOLE	40	DIP	RECTANGULAR	CERAMIC	NO		CMOS		YES	5	5		IN-LINE	DIP40,.6			Counters	2.54 mm	85 Cel			-40 Cel	Tin/Lead (Sn/Pb)	DUAL		R-XDIP-T40								e0

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.