ICM7218 Intersil Corporation, ICM7218 Datasheet - Page 4

• Manufacturer Part Number: ICM7218
• Description: 8-Digit LED Microprocessor-Compatible Multiplexed Display Decoder Driver
• Manufacturer: Intersil Corporation

Pin Descriptions
NOTES:
Electrical Specifications
Digital Address Hold Time
Data Input Impedance
ICM7218A AND ICM7218B
WRITE
MODE
ID4 (SHUTDOWN)
ID5 (DECODE)
ID6 (HEXA/CODE B)
ID7 (DATA COMING)
ID0-ID7
ICM7218C AND ICM7218D
WRITE
HEXA/CODE B/ SHUTDOWN
DA0 - DA2
ID0 - ID3
ID7 (INPUT D.P.)
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
4. ID0-ID3 = Don’t Care when writing control 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
6. Common Anode segment drivers and Common Cathode Digit Drivers have 20kΩ pullup resistors.
when Pin 9 is open-circuited. These resistors consume power and result in a quiescent supply current (I
and B devices do not have these biasing resistors and thus are not subject to this condition.
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).
(i.e., segments are positive true, decimal point is negative true).
PARAMETER
INPUT
MODE High
MODE Low 11, 12, 13, 14, 5, 6, 10, 7
4
V
DD
= 5V, V
14, 13, 11, 12
TERMINAL
9 (Note 3)
SYMBOL
SS
10, 6, 5
t
Z
AH
10
8
9
6
5
7
8
7
= 0V, T
IN
A
= +25°C, Display Diode Drop = 1.7V (Continued)
7218C, 7218D
5-10pF Gate Capacitance
ICM7218
LOGIC LEVEL
TEST CONDITIONS
Floating
High
High
High
High
High
High
High
High
Low
Low
Low
Low
Low
Low
Low
Low
Input Not Loaded
Input Loaded
Load Control Bits on Write Pulse
Load Input Data on Write Pulse
Normal Operation
Shutdown (Oscillator, Decoder and Display Disabled)
No Decode
Decode
Hexadecimal Decoding
Code B Decoding
Data Coming
No Data Coming
Display Data Inputs (Notes 4, 5)
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
MIN
}
Q
0
-
) of typically 50μΑ. The ICM7218A,
Control Word
FUNCTION
10
TYP
-
10
MAX
-
-
February 15, 2007
UNITS
FN3159.2
ns
Ω
DD
/2