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參數(shù)資料
| 型號： | ICM7218 |
| 廠商： | Intersil Corporation |
| 英文描述： | 8-Digit LED Microprocessor-Compatible Multiplexed Display Decoder Driver(8位數(shù)字LED顯示驅(qū)動(dòng)器) |
| 中文描述： | 8位、復(fù)用輸出、LED解碼驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 252K |
| 代理商： | ICM7218 |
5
FN3159.2
February 15, 2007
Detailed Description
DECODE Operation
For the lCM7218A/B products, there are 3 input data formats
possible; either direct segment and decimal point information (8
bits per digit) or two Binary formats plus decimal point
information (Hexadecimal/Code B formats with 5 bits per digit).
The 7-segment decoder on chip is disabled when direct
segment information is to be written. In this format, the
inputs directly control the outputs as follows:
Here, "Ones" represent "on" segments for all inputs except
the Decimal Point. For the Decimal Point "zero" represents
an "on" segment.
HEXAdecimal/CODE B Decoding
For all products, a choice of either HEXA or Code B decoding
may be made. HEXA decoding provides 7-segment numeric
plus six alpha characters while Code B provides a negative
sign (-), a blank (for leading zero blanking), certain useful
alpha characters and all numeric formats.
The four bit binary code is set up on inputs lD3-lD0, and
decimal point data is set up on ID7.
SHUTDOWN
SHUTDOWN performs several functions: it puts the device
into a very low dissipation mode (typically 10
μ
A at V
DD
= 5V),
turns off both the digit and segment drivers, and stops the
multiplex scan oscillator (this is the only way the scan
oscillator can be disabled). However, it is still possible to input
data to the memory during shutdown - only the display output
sections of the device are disabled in this mode.
Powerdown
In the Shutdown Mode, the supply voltage may be reduced to
2V without data in memory being lost. However, data should
not be written into memory if the supply voltage is less than 4V.
Output Drive
The common anode output drive is approximately 200mA per
digit at a 12% duty cycle. With segment peak drive current of
40mA typically, this results in 5mA average drive. The common
cathode drive capability is approximately one-half that of the
common anode drive. If high impedance LED displays are
used, the drive current will be correspondingly less.
FIGURE 2. MULTIPLEX TIMING (COMMON CATHODE VERSION)
Input Data:
ID7
lD6
ID5 lD4
lD3
lD2
lD1 ID0
Output Segments:
D.P.
a
b
c
e
g
f
d
FIGURE 3. SEGMENT ASSIGNMENTS
DECIMAL 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
15
HEXA
CODE
0 1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
CODE B
0 1 2 3 4 5 6 7 8 9
-
E
H
L
P
(BLANK)
ICM7218
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICM72188IPI | 制造商:Maxim Integrated Products 功能描述: |
| ICM7218A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| ICM7218AI/D | 功能描述:LED顯示驅(qū)動(dòng)器 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 |
| ICM7218AIJI | 功能描述:LED顯示驅(qū)動(dòng)器 DISPLAY 8 DIG LED DRIVER 28CDIP IND 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 |
| ICM7218AIJI+ | 功能描述:LED顯示驅(qū)動(dòng)器 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 |
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