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Intersil Electronic Components Datasheet

ICM7243 Datasheet

LED Display Decoder Driver

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ICM7243 pdf
ICM7243
August 1997
8-Character, Microprocessor-
Compatible, LED Display Decoder Driver
Features
Description
• 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
Ordering Information
PART NUMBER
ICM7243AIJL
ICM7243AIPL
ICM7243BIJL
TEMP.
RANGE (oC)
PACKAGE
-25oC to 85 40 Ld CERPDIP
-25oC to 85 40 Ld PDIP
-25oC to 85 40 Ld CERPDIP
PKG.
NO.
F40.6
E40.6
F40.6
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 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.
ICM7243BlPL
-25 to 85 40 Ld PDIP
E40.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
9-21
File Number 3162.1



Intersil Electronic Components Datasheet

ICM7243 Datasheet

LED Display Decoder Driver

No Preview Available !

ICM7243 pdf
ICM7243
Pinouts
ICM7243A (16-SEGMENT CHARACTER)
(PDIP, CERDIP)
TOP VIEW
ICM7243B (14-SEGMENT CHARACTER)
(PDIP, CERDIP)
TOP VIEW
VDD 1
SEG m 2
SEG e 3
SEG g1 4
SEG k 5
SEG c 6
SEG d1 7
SEG a1 8
SEG a2 9
D0 10
D1 11
D2 12
D3 13
D4 14
D5 15
CS 16
WR 17
CHAR 8 18
CHAR 7 19
CHAR 6 20
40 SEG l
39 SEG g2
38 SEG b
37 SEG i
36 SEG f
35 SEG d2
34 DP
33 SEG h
32 SEG j
31 MODE
30 A0/SEN
29 A1/CLR
28 A2/DISP FULL
27 OSC/OFF
26 CHAR 1
25 CHAR 2
24 CHAR 3
23 CHAR 4
22 VSS
21 CHAR 5
VDD 1
SEG e 2
SEG g1 3
SEG k 4
SEG c 5
SEG d 6
SEG a 7
D0 8
D1 9
D2 10
D3 11
D4 12
D5 13
CS 14
CS 15
CS 16
WR 17
CHAR 8 18
CHAR 7 19
CHAR 6 20
40 SEG m
39 SEG l
38 SEG g2
37 SEG b
36 SEG i
35 SEG f
34 DP
33 SEG h
32 SEG j
31 MODE
30 A0/SEN
29 A1/CLR
28 A2/DISP FULL
27 OSC/OFF
26 CHAR 1
25 CHAR 2
24 CHAR 3
23 CHAR 4
22 VSS
21 CHAR 5
9-22



Intersil Electronic Components Datasheet

ICM7243 Datasheet

LED Display Decoder Driver

No Preview Available !

ICM7243 pdf
Functional Block Diagram
ICM7243
DATA INPUT
D0 - D5
Q
D
DATA
LATCHES
CL
D1 8 x 6
DATA
MEMORY
D0
CLR
CL ADR
6
17
64 x 17 (NOTE 1)
ROM
(NOTE 1)
SEGMENT
DRIVERS
SEGMENT
OUTPUTS
SEG x
WR
(NOTE 1) CS
CS
CS
ONE
SHOT
8
MODE
CL
D
A0/SEN
SEL
CL
D ADDRESS
LATCHES
8 8 CHAR N
CCHHAARRAACCTTEERR
DRIVERS
CHARACTER
OUTPUTS
3
SEL
A1/CLR
A2/DISP FULL
MUX
D CL Q
CONTROL
LATCH
OSC/OFF
OMSUCLITLILPALTEOXR
OSCILLATOR
ESNEQUCELNTIAL
SEQUENTIAL
ADDRESS 3
COUNTER
CLR
OVERFLOW
ADDRESS
MULITPLEXER
MULATINPDLEXER
DECODER
CHARACTER
MULTIPLEX
COUNTER
3
INTER-CHARACTER BLANKING
NOTE:
1. ICM7243A has only one CS and no CS.
ICM7243B has 15 Segments.
9-23




Part Number ICM7243
Description LED Display Decoder Driver
Maker Intersil Corporation
Total Page 12 Pages
PDF Download
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