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PCF8576D 数据表(PDF) 13 Page - NXP Semiconductors |
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PCF8576D 数据表(HTML) 13 Page - NXP Semiconductors |
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13 / 52 page  PCF8576D_9 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 09 — 25 August 2009 13 of 52 NXP Semiconductors PCF8576D Universal LCD driver for low multiplex rates (1) Vstate1(t) = VSn(t) − VBP0(t). (2) Von(RMS) = 0.745VLCD. (3) Vstate2(t) = VSn+1(t) − VBP1(t). (4) Voff(RMS) = 0.333VLCD. Fig 8. Waveforms for the 1:2 multiplex drive mode with 1 ⁄3 bias mgl747 state 1 BP0 (a) Waveforms at driver. (b) Resultant waveforms at LCD segment. LCD segments state 2 BP1 state 1 state 2 VSS VLCD 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 0 V VLCD 2VLCD / 3 −2VLCD / 3 VLCD / 3 −VLCD / 3 −VLCD −VLCD 0 V VLCD 2VLCD / 3 −2VLCD / 3 VLCD / 3 −VLCD / 3 S n S n+1 Tfr VSS VLCD 2VLCD / 3 VLCD / 3 |
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