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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 4/11頁(yè) |
| 文件大小： | 252K |
| 代理商： | ICM7218 |
4
FN3159.2
February 15, 2007
Digital Address Hold Time
t
AH
Z
IN
7218C, 7218D
0
-
-
ns
Data Input Impedance
5-10pF Gate Capacitance
-
10
10
-
Ω
Electrical Specifications
V
DD
= 5V, V
SS
= 0V, T
A
= +25°C, Display Diode Drop = 1.7V
(Continued)
SYMBOL
TEST CONDITIONS
PARAMETER
MIN
TYP
MAX
UNITS
Pin Descriptions
INPUT
TERMINAL
LOGIC LEVEL
FUNCTION
ICM7218A AND ICM7218B
WRITE
8
High
Input Not Loaded
Low
Input Loaded
MODE
9
High
Load Control Bits on Write Pulse
Low
Load Input Data on Write Pulse
ID4 (SHUTDOWN)
MODE High
10
High
Normal Operation
Low
Shutdown (Oscillator, Decoder and Display Disabled)
ID5 (DECODE)
6
High
No Decode
Low
Decode
ID6 (HEXA/CODE B)
5
High
Hexadecimal Decoding
Low
Code B Decoding
ID7 (DATA COMING)
7
High
Data Coming
No Data Coming
Low
ID0-ID7
MODE Low
11, 12, 13, 14, 5, 6, 10, 7
Display Data Inputs (Notes 4, 5)
ICM7218C AND ICM7218D
WRITE
8
High
Input Not Loaded into Memory
Low
Input Loaded into Memory
HEXA/CODE B/ SHUTDOWN
9 (Note 3)
High
Hexadecimal Decoding
Floating
Code B Decoding
Low
Shutdown (Oscillator, Decoder and Display Disabled)
DA0 - DA2
10, 6, 5
Digit Address Inputs
ID0 - ID3
14, 13, 11, 12
Display Data Inputs
ID7 (INPUT D.P.)
7
Decimal Point Input
NOTES:
3. In the ICM7218C and D (random access versions) the HEXA/CODE B/SHUTDOWN input (Pin 9) has internal biasing resistors to hold it at V
DD
/2
when Pin 9 is open-circuited. These resistors consume power and result in a quiescent supply current (I
Q
) of typically 50
μΑ
. The ICM7218A,
and B devices do not have these biasing resistors and thus are not subject to this condition.
4. ID0-ID3 = Don’t Care when writing control data.
ID4-ID6 = Don’t Care when writing Hex/Code B data.
ID7 = Decimal Point data.
(The display blanks on ICM7218A/B versions when writing in data).
5. In the No Decode format, “Ones” represents “on” segments for all inputs except for the Decimal Point, where “Zero” represents an “on” segment
(i.e., segments are positive true, decimal point is negative true).
6. Common Anode segment drivers and Common Cathode Digit Drivers have 20k
Ω
pullup resistors.
}
Control Word
ICM7218
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