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PCF8578H Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer PCF8578H
Beschreibung LCD row/column driver for dot matrix graphic displays
Hersteller NXP Semiconductors
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Gesamt 30 Seiten
PCF8578H Datasheet, Funktion
INTEGRATED CIRCUITS
DATA SHEET
PCF8578
LCD row/column driver for dot
matrix graphic displays
Product specification
Supersedes data of 1997 Mar 28
File under Integrated Circuits, IC12
1998 Sep 08






PCF8578H Datasheet, Funktion
Philips Semiconductors
LCD row/column driver for dot matrix
graphic displays
Product specification
PCF8578
1998 Sep 08
SDA 1
56 R0
SCL 2
55 R1
SYNC 3
54 R2
CLK 4
53 R3
VSS 5
52 R4
TEST 6
51 R5
SA0 7
50 R6
OSC 8
49 R7
V DD 9
V 2 10
V 3 11
48 R8/C8
47 R9/C9
46 R10/C10
V 4 12
V 5 13
45 R11/C11
44 R12/C12
V LCD 14
n.c. 15
PCF8578
43 R13/C13
42 R14/C14
n.c. 16
41 R15/C15
C39 17
40 R16/C16
C38 18
39 R17/C17
C37 19
38 R18/C18
C36 20
37 R19/C19
C35 21
36 R20/C20
C34 22
35 R21/C21
C33 23
34 R22/C22
C32 24
33 R23/C23
R31/C31 25
32 R24/C24
R30/C30 26
31 R25/C25
R29/C29 27
30 R26/C26
R28/C28 28
29 R27/C27
MSA839
Fig.2 Pin configuration (VSO56).
6

6 Page









PCF8578H pdf, datenblatt
Philips Semiconductors
LCD row/column driver for dot matrix
graphic displays
Product specification
PCF8578
1998 Sep 08
ROW 1
R1 (t)
VDD
V2
V3
V4
V5
V LCD
ROW 2
R2 (t)
VDD
V2
V3
V4
V5
V LCD
COL 1
C1 (t)
VDD
V2
V3
V4
V5
V LCD
COL 2
C2 (t)
VDD
V2
V3
V4
V5
V LCD
V op
V state 1 (t)
0.261 Vop
0V
0.261 Vop
T frame
V op
V state 2 (t)
V op
0.478 Vop
0.261 Vop
0V
0.261 Vop
0.478 Vop
V op
Vstate 1 (t) = C1(t) R1(t):
Von(rms) =
Vop
1
8
8
(
8
8
1
1)
=
0.430
Vstate 2 (t) = C2(t) R2(t):
Voff(rms) =
Vop
2(
8
(
8
8
1)
1) 2
=
0.297
state 1 (OFF)
state 2 (ON)
dot matrix
1:8 multiplex rate
MSA840
general relationship (n = multiplex rate)
Von(rms) =
Vop
1 n1
n n ( n 1)
Voff(rms)
Vop
=
2( n 1)
n ( n 1)2
Fig.7 LCD drive mode waveforms for 1 : 8 multiplex rate.
12

12 Page





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