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参数资料
| 型号： | AY0438IS |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 32-Segment CMOS LCD Driver |
| 中文描述： | 32段LCD驱动器的CMOS |
| 文件页数： | 3/11页 |
| 文件大小： | 148K |
| 代理商： | AY0438IS |
1995 Microchip Technology Inc.
DS70010I-page 3
AY0438
1.3
LCD
φ
LCD
necting a capacitor between LCD
which will enable the on-chip oscillator required to gen-
erate the backplane output voltage. Figure 5 shows the
relationship between capacitance value and output fre-
quency. Leaving the LCD
φ
recommended. When driven by an external clock, the
backplane output is in phase with the input clock. When
cascading two AY0438 devices (Figure 6 and
Figure 7), the backplane output can be generated
using a capacitor to GND on the first AY0438. This
backplane output can then be connected to the LCD
input of the second AY0438. The backplane output of
the second device is then used to drive the backplane
of the LCD module.
φ
can be driven by an external signal or by con-
φ
and ground (GND),
input unconnected is not
φ
FIGURE 5: OSCILLATOR FREQUENCY
GRAPH (TYPICAL @ 25
°
C)
140
120
100
80
60
40
0
20
40
60
80
100
120
CL (pF)
B
FIGURE 6: CASCADING TWO AY0438 DEVICES
FIGURE 7: CASCADE TIMING DIAGRAM
32 Latches
Clock
Load
Data
out
1 to 32
Outputs
32 Segment Drivers
LCD AC
Generator
32-bit Static Shift Register
32 Latches
Data
out
Backplane
output
32 Segment Drivers
LCD AC
Generator
32-bit Static Shift Register
Data
in
Data
in
Clock
Load
Clock
Load
Backplane
output
LCD
Φ
LCD
Φ
33 to 64
Outputs
START
CLOCK
Data in
Data out
Load
1/f
t
DS
t
DH
t
PD
64
1
t
PW
63
SEG 64
SEG 2
SEG 1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AY0438-I-S | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32-Segment CMOS LCD Driver |
| AY0438L | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32-Segment CMOS LCD Driver |
| AY0438-L | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32-Segment CMOS LCD Driver |
| AY0438P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32-Segment CMOS LCD Driver |
| AY0438-P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32-Segment CMOS LCD Driver |
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