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ICM7243AIJL Datasheet

  • ICM7243AIJL

  • 8-Character, Microprocessor- Compatible, LED Display Decoder...

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  • INTERSIL   INTERSIL

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ICM7243
August 1997
8-Character, Microprocessor-
Compatible, LED Display Decoder Driver
Description
The ICM7243 is an 8-character, alphanumeric display driver
and controller which provides all the circuitry required to
interface a microprocessor or digital system to a 14-segment
or 16-segment display. It is primarily intended for use in
microprocessor systems, where it minimizes hardware and
software overhead. Incorporated on-chip are a 64-character
ASClI decoder, 8 x 6 memory, high power character and
segment drivers, and the multiplex scan circuitry.
6-bit ASCll data to be displayed is written into the memory
directly from the microprocessor data bus. Data location
depends upon the selection of either
Sequential
(MODE = 1) or
Random
access mode (MODE = 0). In the
Sequential Access
mode the 鏗乺st entry is stored in the
lowest location and displayed in the 鈥渓eft-most鈥?character
position. Each subsequent entry is automatically stored in
the next higher location and displayed to the immediate
鈥渞ight鈥?of the previous entry. A DISPlay FULL signal is pro-
vided after 8 entries; this signal can be used for cascading
devices together. A CLeaR pin is provided to clear the mem-
ory and reset the location counter. The
Random Access
mode allows the processor to select the memory address
and display digit for each input word.
The character multiplex scan runs whenever data is not
being entered. It scans the memory and CHARacter drivers,
and ensures that the decoding from memory to display is
done in the proper sequence. Intercharacter blanking is
provided to avoid display ghosting.
Features
鈥?14-Segment and 16-Segment Fonts with Decimal Point
鈥?Mask Programmable for Other Font-Sets Up to 64
Characters
鈥?Microprocessor Compatible
鈥?Directly Drives LED Common Cathode Displays
鈥?Cascadable Without Additional Hardware
鈥?Standby Feature Turns Display Off; Puts Chip in Low
Power Mode
鈥?Sequential Entry or Random Entry of Data Into
Display
鈥?Single +5V Operation
鈥?Character and Segment Drivers, All MUX Scan
Circuitry, 8 x 6 Static Memory and 64-Character ASCll
Font Generator Included On-Chip
Ordering Information
PART NUMBER
ICM7243AIJL
ICM7243AIPL
ICM7243BIJL
ICM7243BlPL
TEMP.
RANGE (
o
C)
-25
o
C to 85
-25
o
C to 85
-25
o
C to 85
-25 to 85
PACKAGE
40 Ld CERPDIP
40 Ld PDIP
40 Ld CERPDIP
40 Ld PDIP
PKG.
NO.
F40.6
E40.6
F40.6
E40.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
漏
Intersil Corporation 1999
File Number
3162.1
9-21

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