参数资料
型号: ICM7218AIJIR5254
厂商: Intersil
文件页数: 4/11页
文件大小: 0K
描述: IC DRIVER DECODER 8DIG 28-CERDIP
标准包装: 143
显示器类型: LED
配置: 7 段显示
数字或字符: 8 位数字
电流 - 电源: 2.5mA
电源电压: 4 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 28-CDIP(0.600",15.24mm)
供应商设备封装: 28-CDIP 熔接密封,带窗口
包装: 管件
ICM7218
Electrical Specifications
V DD = 5V, V SS = 0V, T A = +25°C, Display Diode Drop = 1.7V (Continued)
PARAMETER
Digital Address Hold Time
Data Input Impedance
SYMBOL
t AH
Z IN
TEST CONDITIONS
7218C, 7218D
5-10pF Gate Capacitance
MIN
0
-
TYP
-
10 10
MAX
-
-
UNITS
ns
Ω
Pin Descriptions
INPUT
TERMINAL
LOGIC LEVEL
FUNCTION
ICM7218A AND ICM7218B
WRITE
MODE
8
9
High
Low
High
Low
Input Not Loaded
Input Loaded
Load Control Bits on Write Pulse
Load Input Data on Write Pulse
ID4 (SHUTDOWN)
MODE High
10
High
Normal Operation
Low
Shutdown (Oscillator, Decoder and Display Disabled)
ID5 (DECODE)
ID6 (HEXA/CODE B)
6
5
High
Low
High
Low
No Decode
Decode
Hexadecimal Decoding
Code B Decoding
ID7 (DATA COMING)
7
High
Low
Data Coming
No Data Coming
} Control Word
ID0-ID7
MODE Low
11, 12, 13, 14, 5, 6, 10, 7
Display Data Inputs (Notes 4, 5)
ICM7218C AND ICM7218D
WRITE
HEXA/CODE B/ SHUTDOWN
DA0 - DA2
ID0 - ID3
ID7 (INPUT D.P.)
8
9 (Note 3)
10, 6, 5
14, 13, 11, 12
7
High
Low
High
Floating
Low
Input Not Loaded into Memory
Input Loaded into Memory
Hexadecimal Decoding
Code B Decoding
Shutdown (Oscillator, Decoder and Display Disabled)
Digit Address Inputs
Display Data Inputs
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.
4
FN3159.2
February 15, 2007
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