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Details, datasheet, quote on part number:ICM7228DMJI883B
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Datasheet text preview:
ICM7228
August 1997
8-Digit, MicroprocessorCompatible, LED Display Decoder Driver
Description
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 circuitr y, 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 and ICM7228D display RAM in parallel random access format. The ICM7228A and ICM7228C drive common anode displays. The ICM7228B and ICM7228D drive 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
· 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 ICM7228AIPI ICM7228BIPI ICM7228CIPI ICM7228DIPI ICM7228AIJI ICM7228BIJI ICM7228CIJI ICM7228DIJI ICM7228AIBI ICM7228BIBI ICM7228CIBI ICM7228DIBI ICM7228AMJI883B ICM7228BMJI883B ICM7228CMJI883B ICM7228DMJI883B DATA ENTRY PROTOCOL Sequential Sequential Random Random Sequential Sequential Random Random Sequential Sequential Random Random Sequential Sequential Random Random DISPLAY TYPE Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode Common Anode Common Cathode TEMP. RANGE (oC) -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 -55 to 125 -55 to 125 -55 to 125 -55 to 125 PACKAGE 28 Ld PDIP 28 Ld PDIP 28 Ld PDIP 28 Ld PDIP 28 Ld CERDIP 28 Ld CERDIP 28 Ld CERDIP 28 Ld CERDIP 28 Ld SOIC 28 Ld SOlC 28 Ld SOlC 28 Ld SOlC 28 Ld CERDIP 28 Ld CERDIP 28 Ld CERDIP 28 Ld CERDIP PKG. NO. E28.6 E28.6 E28.6 E28.6 F28.6 F28.6 F28.6 F28.6 M28.3 M28.3 M28.3 M28.3 F28.6 F28.6 F28.6 F28.6
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
File Number
3160.1
9-17
ICM7228 Pinouts
ICM7228A (CERDIP, PDIP, SOIC) COMMON ANODE TOP VIEW
SEG c 1 SEG e 2 SEG b 3 DP 4 ID6 (HEXA/CODE B) 5 ID5 (DECODE) 6 ID7 (DATA COMING) 7 28 VSS 27 SEG a 26 SEG g 25 SEG d 24 SEG f 23 DIGIT 3 22 DIGIT 6 21 DIGIT 7 20 DIGIT 4 19 VDD 18 DIGIT 8 17 DIGIT 5 16 DIGIT 2 15 DIGIT 1
ICM7228B (CERDIP, PDIP, SOIC) COMMON CATHODE TOP VIEW
DIGIT 4 1 DIGIT 6 2 DIGIT 3 3 DIGIT 1 4 ID6 (HEXA/CODE B) 5 ID5 (DECODE) 6 ID7 (DATA COMING) 7 28 VSS 27 DIGIT 7 26 DIGIT 5 25 DIGIT 2 24 DIGIT 8 23 SEG g 22 SEG f 21 SEG e 20 SEG c 19 VDD 18 SEG d 17 SEG b 16 SEG a 15 DP
WRITE 8 MODE 9 ID4 (SHUTDOWN) 10 ID1 11 ID0 12 ID2 13 ID3 14
WRITE 8 MODE 9 ID4 (SHUTDOWN) 10 ID1 11 ID0 12 ID2 13 ID3 14
ICM7228C (CERDIP, PDIP, SOIC) COMMON ANODE TOP VIEW
SEG c 1 SEG e 2 SEG b 3 DP 4 DA0 (DIGIT ADDRESS 0) 5 DA1 (DIGIT ADDRESS 1) 6 ID7 (INPUT DP) 7 WRITE 8 HEXA/CODE B/SHUTDOWN 9 28 VSS 27 SEG a 26 SEG g 25 SEG d 24 SEG f 23 DIGIT 3 22 DIGIT 6 21 DIGIT 7 20 DIGIT 4 19 VDD 18 DIGIT 8 17 DIGIT 5 16 DIGIT 2 15 DIGIT 1
ICM7228D (CERDIP, PDIP, SOIC) COMMON CATHODE TOP VIEW
DIGIT 4 1 DIGIT 6 2 DIGIT 3 3 DIGIT 1 4 DA0 (DIGIT ADDRESS 0) 5 DA1 (DIGIT ADDRESS 1) 6 ID7 (INPUT DP) 7 WRITE 8 HEXA/CODE B/SHUTDOWN 9 28 VSS 27 DIGIT 7 26 DIGIT 5 25 DIGIT 2 24 DIGIT 8 23 SEG g 22 SEG f 21 SEG e 20 SEG c 19 VDD 18 SEG d 17 SEG b 16 SEG a 15 DP
DA2 (DIGIT ADDRESS 2) 10 ID1 11 ID0 12 ID2 13 ID3 14
DA2 (DIGIT ADDRESS 2) 10 ID1 11 ID0 12 ID2 13 ID3 14
9-18
ICM7228 Functional Block Diagram
ICM7228A, ICM7228B
ID0 - ID7 INPUT DATA 8 DECODE HEXA/CODE B CONTROL LOGIC 1 SHUTDOWN 8 ID4 - ID7 CONTROL INPUTS MODE 1 4
ICM7228C, ICM7228D
HEXADECIMAL/ CODE B/ SHUTDOWN 1 DA0 - DA2 ID0 - ID3 DIGIT ID7 DATA INPUT WRITE ADDRESS 3 5 1
WRITE 1
THREE LEVEL INPUT LOGIC
1
SHUTDOWN
1
1 1 7 4
8-BYTE STATIC RAM
8 8
WRITE ADDRESS COUNTER 1 1
8 8-BYTE STATIC RAM
WRITE ADDRESS COUNTER
8
8
READ ADDRESS, DIGIT MULTIPLEXER 3
4
8
READ ADDRESS MULTIPLEXER 5
HEXADECIMAL/ CODE B DECODER 7
7 MULTIPLEX OSCILLATOR HEXADECIMAL/ CODE B DECODER
1
1
MULTIPLEX OSCILLATOR
DECODE NO-DECODE 8 7 DECIMAL POINT 8 SEGMENT DRIVERS 1 INTERDIGIT BLANKING 8 DIGIT DRIVERS 7 DECIMAL POINT 8 SEGMENT DRIVERS 8 DIGIT DRIVERS 8 1 INTERDIGIT BLANKING
9-19
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