®
ICM7228
Data Sheet
December 6, 2005
FN3160.8
8-Digit, Microprocessor-Compatible, LED
Display Decoder Driver
The Intersil ICM7228 display driver interfaces
microprocessors to an 8-digit, 7-segment, numeric LED
display. Included on chip are two types of 7-segment
decoder, multiplex scan circuitry, LED display segment
drivers, LED display digit drivers and an 8-byte static
memory as display RAM.
Data can be written to the ICM7228A and ICM7228B’s display
RAM in sequential 8-digit update or in single-digit update
format. Data is written to the ICM7228C display RAM in parallel
random access format. The ICM7228A and ICM7228C drive
common anode displays. The ICM7228B drives common
cathode displays. All versions can display the RAM data as
either Hexadecimal or Code B format. The ICM7228A and
ICM7228B incorporate a No Decode mode allowing each bit of
each digit's RAM word to drive individual display segments
resulting in independent control of all display segments. As a
result, bargraph and other irregular display segments and
formats can be driven directly by this chip.
The Intersil ICM7228 is an alternative to both the Maxim
ICM7218 and the Intersil ICM7218 display drivers. Notice that
the ICM7228A/B has an additional single digit access mode.
This could make the Intersil ICM7218A/B software incompatible
with ICM7228A/B operation.
Features
•
Pb-Free Plus Anneal Available (RoHS Compliant)
• Improved 2nd Source to Maxim ICM7218
• Fast Write Access Time of 200ns
• Multiple Microprocessor Compatible Versions
• Hexadecimal, Code B and No Decode Modes
• Individual Segment Control with “No Decode” Feature
• Digit and Segment Drivers On-Chip
• Non-Overlapping Digits Drive
• Common Anode and Common Cathode LED Versions
• Low Power CMOS Architecture
• Single 5V Supply
Applications
• Instrumentation
• Test Equipment
• Hand Held Instruments
• Bargraph Displays
• Numeric and Non-Numeric Panel Displays
• High and Low Temperature Environments where LCD
Display Integrity is Compromised
Ordering Information
PART NUMBER
ICM7228AIBI
ICM7228AIBIZ (Note)
ICM7228AIPI
ICM7228AIPIZ (Note)
ICM7228BIBI
ICM7228BIBIZ (Note)
ICM7228BIPI
ICM7228BIPIZ (Note)
ICM7228CIBI
PART MARKING
ICM7228AIBI
7228AIBIZ
ICM7228AIPI
ICM7228AIPI
ICM7228BIBI
ICM7228BIBIZ
ICM7228BIPI
ICM7228BIPIZ
ICM7228CIBI
DATA ENTRY
PROTOCOL
Sequential
Sequential
Sequential
Sequential
Sequential
Sequential
Sequential
Sequential
Random
Random
Random
Random
DISPLAY TYPE
Common Anode
Common Anode
Common Anode
Common Anode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Anode
Common Anode
Common Anode
Common Anode
TEMP. RANGE
(
o
C)
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
PACKAGE
28 Ld SOIC
28 Ld SOIC (Pb-free)
28 Ld PDIP
28 Ld PDIP* (Pb-free)
28 Ld SOlC
28 Ld SOlC (Pb-free)
28 Ld PDIP
28 Ld PDIP (Pb-free)
28 Ld SOlC
28 Ld SOlC (Pb-free)
28 Ld PDIP
28 Ld PDIP (Pb-free)
PKG. DWG. #
M28.3
M28.3
E28.6
E28.6
M28.3
M28.3
E28.6
E28.6
M28.3
M28.3
E28.6
E28.6
ICM7228CIBIZ (Note) ICM7228CIBIZ
ICM7228CIPI
ICM7228CIPI
ICM7228CIPIZ (Note) ICM7228CIPI
*Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or
1-888-468-3774
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