PCF8578HT View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
PCF8578HT Datasheet PDF : 46 Pages
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NXP Semiconductors
PCF8578
LCD row/column driver for dot matrix graphic displays
Tfr
VDD
V2
ROW 1 V3
R1 (t) V4
V5
VLCD
ROW 2
R2 (t)
VDD
V2
V3
V4
V5
VLCD
COL 1
C1 (t)
VDD
V2
V3
V4
V5
VLCD
COL 2
C2 (t)
VDD
V2
V3
V4
V5
VLCD
Voper
Vstate 1(t)
0.2 Voper
0V
0.2 Voper
Voper
Vstate 2(t)
Voper
0.6 Voper
0.2 Voper
0V
0.2 Voper
0.6 Voper
Voper
Fig 9.
Vstate1(t) = C1(t) − R1(t).
V-----o---n--(--R---M-----S--) = --1--- + ----------1---6-----–----1--------= 0.316
Voper
16 16( 16 + 1)
Vstate2(t) = C2(t) − R2(t).
V-----o---f-f---(-R----M----S---) =
Voper
-----1-2--6-(--(-----1--1-6--6--–--+---1--1-)--)---2- = 0.254
LCD drive mode waveform for 1:16 multiplex rate
state 1 (OFF)
state 2 (ON)
dot matrix
1:16 multiplex rate
msa836
PCF8578_6
Product data sheet
Rev. 06 — 5 May 2009
© NXP B.V. 2009. All rights reserved.
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