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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF85134 датащи(PDF) 33 Page - NXP Semiconductors |
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PCF85134 датащи(HTML) 33 Page - NXP Semiconductors |
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33 / 40 page  PCF85134_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 01 — 17 December 2009 33 of 40 NXP Semiconductors PCF85134 Universal LCD driver for low multiplex rates The contact resistance between the SYNC pins of cascaded devices must be controlled. If the resistance is too high, the device will not be able to synchronize properly. Table 19 shows the maximum contact resistance values. Fig 21. Synchronization of the cascade for various PCF85134 drive modes Table 19. SYNC contact resistance Number of devices Maximum contact resistance 2 6000 Ω 3 to 5 2200 Ω 6 to 10 1200 Ω 11 to 16 700 Ω Tfr = f fr 1 BP0 SYNC BP0 (1/2 bias) SYNC BP0 (1/3 bias) (a) static drive mode. (b) 1:2 multiplex drive mode. (c) 1:3 multiplex drive mode. (d) 1:4 multiplex drive mode. BP0 (1/3 bias) SYNC SYNC BP0 (1/3 bias) mgl755 |
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