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參數(shù)資料
| 型號(hào)： | M5481 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LED DISPLAY DRIVER |
| 中文描述： | LED顯示驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大小： | 76K |
| 代理商： | M5481 |
M5481
4/8
Figure 2. Input Data Format
At the low state of the clock a RESET signal is
generated which clears all the shift registers for
the next set of data. The shift registers are static
master slave configurations. There is no clear for
the master portion of the first shift register, thus al-
lowing continuous operation.
There must be a complete set of 36 clocks or the
shift registers will not clear.
When power is first applied to the chip an internal
power ON reset signal is generated which resets
all registers and all latches. The START bit and the
first clock reset the chip to its normal operation.
Figure 3
shows the timing relationships between
Data, Clock and DATA ENABLE.
A maximum clock frequency of 0.5MHz is as-
sumed.
Figure 4
shows the Output Data Format for the
M5481. Because it uses only 14 of the possible 35
outputs, 21 of the bits are “Don’t Cares”.
For applications where a lesser number of outputs
are used it is possible to either increase the cur-
rent per output or operate the part at higher than
1V Vout.
The following equation can be used for calcula-
tions.
Tj=[(Vout)(I
LED
)(No. of segments)+
V
DD
x7mA]
x(80°C/W)+Tamb
where:
Tj=junction temperature (150°Cmax)
Vout= voltage at the LED driver outputs
ILED= LED current
80°C/W=thermal coefficient of the package
Tamb=ambiant temperature
Figure 3.
Figure 4. Serial Bus/Outputs Correspondance
36
BIT 34
BIT 35
CLOCK
DATA
LOAD
(INTERNAL)
RESET
(INTERNAL)
START
BIT 1
1
CLOCK
DATA
300ns (min.)
100ns (min.)
DATA ENABLE
5450
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
START
5481
X
X
X
X
13
X
X
X
X
X
12
11
10
9
X
X
X
START
5450
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
START
5481
X
8
7
6
5
X
X
X
X
4
3
2
1
X
X
X
X
START
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M5481_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LED DISPLAY DRIVER |
| M5481B7 | 功能描述:LED顯示驅(qū)動(dòng)器 LED Display RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| M5482 | 制造商:Motorola Inc 功能描述:M5482 |
| M5482_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LED DISPLAY DRIVER |
| M548262-60TK | 制造商:OK International 功能描述: |
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