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TC14433COG 데이터시트(PDF) 9 Page - TelCom Semiconductor, Inc |
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TC14433COG 데이터시트(HTML) 9 Page - TelCom Semiconductor, Inc |
9 / 10 page 3-135 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 3-1/2 DIGIT A/D CONVERTERS TC14433 TC14433A Figure 14. 3-1/2 Digit Voltmeter with Low Component Count Using Common Cathode Displays X CLK1 CLK0 OR Q Q VSS VDD VEE TC14433 INPUT V X 300k RESISTOR NETWORK OR INDIVIDUAL RESISTOR* R +5V MINUS CONTROL +5V R COMMON CATHODE LED DISPLAY 75492 OR 1413* DIGIT DRIVERS V (MINUS) EE** ALTERNATE OVERRANGE CIRCUIT WITH SEPARATED LED +5V OR 1/6 1/7 1413 75492 RR OR B1 A B C D LT VSS VDD a b c d e f g I4511B R /C CC0 C0 For V = 2000V V : 1.999V full scale For V = 200 mV V : 199.9 mV full scale (change 470k to R = 27k and decimal point position) *To increase segment current capability add two 75491 ICs between 14511B and Resistor Network. The use of the 1413 as digit driver increases digit current capability over the 75492. Peak digit current for an eight displayed is 7 times the segment current. **V can range between –2.8 and –11V. 470k 0.1 µF 0.1µF DS DS DS DS AG V V DU R EOC REF V REF REF 11 1 1 2 0 1 Q2 43 2 1 M RDP 1 LE +5V 100k Ω TC04 27k Ω |
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