4

FN3159.3

September 15, 2015

Digital Address Hold Time

7218C, 7218D

0

-

-

ns

Data Input Impedance

5-10pF Gate Capacitance

-

-



Electrical Specifications

PARAMETER

SYMBOL

TEST CONDITIONS

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:

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

 pullup resistors.

ICM7218