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Details, datasheet, quote on part number:ICM7243AIJL
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Datasheet text preview:
ICM7243
August 1997
8-Character, MicroprocessorCompatible, 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 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
Ordering Information
PART NUMBER ICM7243AIJL ICM7243AIPL ICM7243BIJL ICM7243BlPL TEMP. RANGE (oC) -25oC to 85 -25oC to 85 -25oC 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 © Intersil Corporation 1999
File Number
3162.1
9-21
ICM7243 Pinouts
ICM7243A (16-SEGMENT CHARACTER) (PDIP, CERDIP) TOP VIEW
VDD SEG m SEG e SEG g1 SEG k SEG c SEG d1 SEG a1 SEG a2 D0 D1 D2 D3 D4 D5 CS WR CHAR 8 CHAR 7 CHAR 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 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
ICM7243B (14-SEGMENT CHARACTER) (PDIP, CERDIP) TOP VIEW
VDD SEG e SEG g1 SEG k SEG c SEG d SEG a D0 D1 D2 D3 D4 D5 CS CS CS WR CHAR 8 CHAR 7 CHAR 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 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
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ICM7243 Functional Block Diagram
Q DATA INPUT D0 - D5 DATA D LATCHES CL 8x6 6 DATA D0 MEMORY CLR ADR CL D1 17 64 x 17 ROM
(NOTE 1)
(NOTE 1)
SEGMENT DRIVERS
SEGMENT OUTPUTS SEG x
WR (NOTE 1) CS CS CS
ONE SHOT
8
CL MODE D
8
8 CHARAC ER CHARACTTER DRIVERS
CHAR N CHARACTER OUTPUTS
SEL A0/SEN
3 CL D ADDRESS LATCHES
SEL
A1/CLR
MUX
CL D Q CONTROL LATCH
EN QUCL TIAL SE EN SEQUENTIAL ADDRESS 3 COUNTER CLR OVERFLOW 3
ADDRESS MULITPLEXER MULAINDEXER T PL DECODER
A2/DISP FULL
OSC/OFF
OSCILLATOR MULTIPLEX OSCILLATOR
CHARACTER MULTIPLEX COUNTER
INTER-CHARACTER BLANKING
NOTE: 1. ICM7243A has only one CS and no CS. ICM7243B has 15 Segments.
9-23
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