Published:2011/3/31 1:40:00 Author:Ecco | Keyword: digital circuit , shift register
7491A, 74L91, 74LS91, 74HC91 8 shift register
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Published:2011/3/31 1:27:00 Author:Ecco | Keyword: digital circuit, decade computer
7490A, 74L90, 74LS90, 74C90 decade computer
Binary frequency and fifth frequency; Door re-zero input and re-set 9 input (used as the complement of applications for BCD9); To utilize the maximum count length of the counter, the input B and output QA could be connected, after input count pulse adds to input A, the out is like the description shown in the menu: output QD connects to input A, and adds the input count to output QA. It will produce input B of frequency square-wave, and get symmetrical frequency count.
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Published:2011/4/1 3:23:00 Author:Ecco | Keyword: digital circuit, BCD seven segment , decoder, driver
Effective high level; Collector circuit output; Turning off input; Having the function of light intensity modulation; The maximumoutput voltage of 74LS49 is 5.5V, absorbing current is 8mA.
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Published:2011/3/31 0:54:00 Author:Ecco | Keyword: digital circuit , quad 2 input , exclusive-or gate
74 series digital circuit of 74LS86 74F86 quad 2 input exclusive-or gate
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Published:2011/4/1 3:18:00 Author:Ecco | Keyword: digital circuit, BCD , seven segment, decoder, driver
7448A, 74LS48, 74C48BCD seven segment decoder/driver
Effective high output; There's an boost resistor inside the circuit, so there's no need to use external resistor; Pilot light input; Leading edge and back porch zero lights turning off control; Having the function of light intensity modulation; The maximum output voltage is 5.5V; Absorbing current: 6448 is 6.4mA, 74LS48 is 6mA. The pin is 7446A.
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Published:2011/3/31 21:36:00 Author:Ecco | Keyword: digital circuit, 4 pull, amplitude comparator
74 series digital circuit of 7485 74LS85 4 pull amplitude comparator
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Published:2011/3/31 21:33:00 Author:Ecco | Keyword: digital circuit, synchronous 4, binary full adder
7483A, 74LS83A, 74HC83, 74C83synchronous 4 binary full adder(carry lookahead)
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Published:2011/3/31 22:43:00 Author:Ecco | Keyword: digital circuit, door input, full adder
7480 door input full adder
1.A=AC+A*+A1·A2, B=BC+B+B1·B22.When A* is used as input, A1 and A2 should be low, when B* is used as input, B1 and B2 should be low.3. When A1 and A2 or B1 and B2 are used as input, A* or B* should be used as completing line and logic.
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Published:2011/3/31 22:36:00 Author:Ecco | Keyword: double J - K , negative edge , trigger, public clear terminal, public clock terminal, preset
74LS78A 74HC78 double J - K negative edge trigger( with preset public clear and public clock terminal)
Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)
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Published:2011/4/1 1:00:00 Author:Ecco | Keyword: digital circuit , 4-bit, bistable, D-type latch
7475, 74L75, 74LS75, 7HC754-bit bistable D-type latch
The Q's level from Qo to G, which is from high level to low level: G=allowable terminal. (View)
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Published:2011/4/1 0:43:00 Author:Ecco | Keyword: digital circuit, input J - K , master-slave flip-flop
7472, 74H72,74L72 input J - K master-slave flip-flop(with preset and remove terminal)
Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)
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Published:2011/4/1 1:50:00 Author:Ecco | Keyword: digital circuit, input J - K, positive edge, trigger
7470 input J - K positive edge trigger (with set and remove terminal)
Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)
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Published:2011/4/1 1:20:00 Author:Ecco | Keyword: digital circuit, dual decade , counter
The counter 1 is in binary and quinary system, the counter 2 is a kind of decade counter. The primary is counting with 50MHz. (View)
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Published:2011/4/1 2:40:00 Author:Ecco | Keyword: digital circuit , 3 input, expander
74H61 3 input expander
X=ABC(when connecting to the Xinput terminal of 74H52) (View)
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Published:2011/3/31 3:20:00 Author:Ecco | Keyword: applied circuit, monolithic, precision function generator
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Published:2011/3/31 3:19:00 Author:Ecco | Keyword: applied circuit, monolithic , precision function generator
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Published:2011/3/31 3:18:00 Author:Ecco | Keyword: applied circuit , monolithic, precision function generator
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Published:2011/3/22 3:48:00 Author:may | Keyword: Lower Power Consumption, Differential Input-Differential Output
Lower Power Consumption Differential Input-Differential Output Circuit is shown in the following picture:
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Published:2011/3/22 3:48:00 Author:may | Keyword: MP3 Player, Power Filter
MP3 Player Power Filter Circuit is shown in the following picture:
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Published:2011/3/30 1:48:00 Author:Ecco | Keyword: digital circuit, double J - K negative edge , trigger
74 series digital circuit of 74H103 double J - K negative edge trigger(with remove terminal)
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