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ICM7243

8-Character, Microprocessor-

Compatible, LED Display Decoder Driver

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 first entry is stored in the

lowest location and displayed in the “left-most” character

position. Each subsequent entry is automatically stored in

the next higher location and displayed to the immediate

“right” of the previous entry. A DISPlay FULL signal is

provided after 8 entries; this signal can be used for

cascading devices together. A CLeaR pin is provided to

clear the memory 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

• 14-Segment and 16-Segment Fonts with Decimal Point

• Mask Programmable for Other Font-Sets Up to 64

Characters

• Microprocessor Compatible

• Directly Drives LED Common Cathode Displays

• Cascadable Without Additional Hardware

• Standby Feature Turns Display Off; Puts Chip in Low

Power Mode

• Sequential Entry or Random Entry of Data Into Display

• Single +5V Operation

• Character and Segment Drivers, All MUX Scan Circuitry, 8

x 6 Static Memory and 64-Character ASCll Font Generator

Included On-Chip

• Pb-Free Plus Anneal Available (RoHS Compliant)

Ordering Information

PART NUMBER

PART MARKING

TEMP. RANGE (°C)

PACKAGE

PKG. DWG. #

ICM7243BlPL

ICM7243BlPL

-25°C to 85°C

40 Ld PDIP

E40.6

ICM7243BlPLZ (See Note)

ICM7243BlPLZ

-25°C to 85°C

40 Ld PDIP (Pb-free)

E40.6

ICM7243AIM44Z (See Note)

ICM7243AIM44Z

-25°C to 85°C

44 Ld MQFP (Pb-free)

Q44.10x10

ICM7243AIM44ZT (See Note)

ICM7243AIM44Z

-25°C to 85°C

44 Ld MQFP (Tape and Reel)

(Pb-free)

Q44.10x10

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Data Sheet

FN3162.3

October 28, 2005

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2003, 2005. All Rights Reserved

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