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부품번호 | OM4085 기능 |
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기능 | Universal LCD driver for low multiplex rates | ||
제조업체 | NXP Semiconductors | ||
로고 | |||
전체 30 페이지수
INTEGRATED CIRCUITS
DATA SHEET
OM4085
Universal LCD driver for low
multiplex rates
Product specification
Supersedes data of 1996 Nov 14
File under Integrated Circuits, IC12
1997 Feb 25
Philips Semiconductors
Universal LCD driver for low multiplex
rates
Product specification
OM4085
PINNING
SYMBOL PIN
DESCRIPTION
SDA
1 I2C-bus data input/output
SCL
2 I2C-bus clock input/output
SYNC
3 cascade synchronization
input/output
CLK 4 external clock input/output
VDD
OSC
5 positive supply voltage
6 oscillator input
A0 7
A1 8 I2C-bus subaddress inputs
A2 9
SA0 10 I2C-bus slave address bit 0 input
VSS
VLCD
BP0
11 logic ground
12 LCD supply voltage
13
BP2 14
LCD backplane outputs
BP1 15
BP3 16
S0 to S23 17 to 40 LCD segment outputs
handbook, halfpage
SDA 1
40 S23
SCL 2
39 S22
SYNC 3
38 S21
CLK 4
37 S20
VDD 5
OSC 6
36 S19
35 S18
A0 7
34 S17
A1 8
33 S16
A2 9
32 S15
SA0 10
31 S14
VSS 11
VLCD 12
BP0 13
OM4085
30 S13
29 S12
28 S11
BP2 14
27 S10
BP1 15
26 S9
BP3 16
25 S8
S0 17
24 S7
S1 18
23 S6
S2 19
22 S5
S3 20
21 S4
MGD865
Fig.2 Pin configuration.
1997 Feb 25
4
4페이지 Philips Semiconductors
Universal LCD driver for low multiplex
rates
Product specification
OM4085
LCD drive mode waveforms
The static LCD drive mode is used when a single backplane is provided in the LCD. Backplane and segment drive
waveforms for this mode are shown in Fig.4.
When two backplanes are provided in the LCD the 1 : 2 multiplex drive mode applies. The OM4085 allows use of
1⁄2 or 1⁄3 bias in this mode as shown in Figs 5 and 6.
The backplane and segment drive waveforms for the 1 : 3 multiplex drive mode (three LCD backplanes) and for the 1 : 4
multiplex drive mode (four LCD backplanes) are shown in Figs 7 and 8 respectively.
handbook, full pagewidth
BP0
Sn
Sn + 1
VDD
VLCD
VDD
VLCD
VDD
VLCD
Vop
Tframe
LCD segments
state 1
(on)
state 2
(off)
(a) waveforms at driver
state 1
0
−Vop
Vop
state 2
0
At any instant (t):
Vstate 1(t) = VSn(t) − VBP0(t)
Von(rms) = Vop
Vstate 2(t) = VSn + 1(t) − VBP0(t)
Voff(rms) = 0 V
−Vop
(b) resultant waveforms
at LCD segment
MGG392
1997 Feb 25
Fig.4 Static drive mode waveforms: Vop = VDD − VLCD.
7
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부품번호 | 상세설명 및 기능 | 제조사 |
OM4085 | Universal LCD driver for low multiplex rates | NXP Semiconductors |
OM4085T | Universal LCD driver for low multiplex rates | NXP Semiconductors |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |