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74HCT4543 Scheda tecnica(PDF) 4 Page - NXP Semiconductors |
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74HCT4543 Scheda tecnica(HTML) 4 Page - NXP Semiconductors |
4 / 11 page December 1990 4 Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver for LCDs 74HC/HCT4543 Fig.4 Functional diagram. Fig.5 Segment designation. APPLICATIONS • Driving LCD displays • Driving fluorescent displays • Driving incandescent displays • Driving gas discharge displays FUNCTION TABLE Notes 1. For liquid crystal displays, apply a square-wave to PH. 2. Depends upon the BCD-code previously applied when LD = HIGH. H = HIGH voltage level L = LOW voltage level X = don’t care INPUTS OUTPUTS DISPLAY LD BI PH(1) D3 D2 D1 D0 Qa Qb Qc Qd Qe Qf Qg X H L X X X X L L L L L L L blank H H H H L L L L L L L L L L L L L L L L L L H H L H L H H L H H H H H H H H L H H L H H H L H L H L L L L L H H 0 1 2 3 H H H H L L L L L L L L L L L L H H H H L L H H L H L H L H H H H L L H H H H H L H H L L L H L H H H L H H H L 4 5 6 7 H H H H L L L L L L L L H H H H L L L L L L H H L H L H H H L L H H L L H H L L H H L L H L L L H H L L H H L L 8 9 blank blank H H H H L L L L L L L L H H H H H H H H L L H H L H L H L L L L L L L L L L L L L L L L L L L L L L L L L L L L blank blank blank blank LL L X X X X (1) (1) as above H as above inverse of above as above |
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