OBSOLETE PRODUCT POSSIBLE SUBSTITUTE PRODUCT ICM7244B DATASHEET ICM7244 FN6675 Rev.1.00 8-Character, Microprocessor Compatible, LED Display Decoder Driver Jan 22, 2009 The ICM7244 is an 8-character, alphanumeric display driver Features and controller which provides all the circuitry required to 6-Segment Fonts with Decimal Point interface a microprocessor or digital system to a 16-segment display with internal pull-up resistors. It is primarily intended Has Internal Pull-Up Resistors of 617 Typ. for use in microprocessor systems, where it minimizes Mask Programmable for Other Font-Sets Up to 64 hardware and software overhead. Incorporated on-chip are a Characters 64-character ASClI decoder, 8x6 memory, high power Microprocessor Compatible character and segment drivers, and the multiplex scan circuitry. Directly Drives LED Common Cathode Displays 6-bit ASCll data to be displayed is written into the memory Cascadable Without Additional Hardware directly from the microprocessor data bus. Data location Standby Feature Turns Display Off Puts Chip in Low depends upon the selection of either Sequential Power Mode (MODE = 1) or Random access mode (MODE = 0). In the Sequential Entry or Random Entry of Data Into Display Sequential Access mode the first entry is stored in the lowest location and displayed in the left-most character Single +5V Operation position. Each subsequent entry is automatically stored in Character and Segment Drivers, All MUX Scan Circuitry, the next higher location and displayed to the immediate 8x6 Static Memory and 64-Character ASCll Font right of the previous entry. A DISPlay FULL signal is Generator Included On-Chip provided after 8 entries this signal can be used for cascading devices together. A CLR pin is provided to clear Pb-Free (RoHS Compliant) 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. Ordering Information PART NUMBER TEMP. RANGE PACKAGE (Note) PART MARKING (C) (Pb-Free) PKG. DWG. ICM7244AIM44Z ICM7244 AIM44Z -25C to +85C 44 Ld MQFP Q44.10x10 ICM7244AIM44ZT ICM7244 AIM44Z -25C to +85C 44 Ld MQFP (Tape and Reel) Q44.10x10 *Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is 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. FN6675 Rev.1.00 Page 1 of 14 Jan 22, 2009ICM7244 Pinout ICM7244 (16-SEGMENT CHARACTER) (44 LD MQFP) TOP VIEW 44 43 42 41 40 39 38 37 36 35 34 SEG d1 1 SEG d2 33 SEG a1 2 DP 32 3 SEG h SEG a2 31 SEG j D0 4 30 MODE D1 5 29 D2 6 A0/SEN 28 D3 7 27 A1/CLR D4 8 26 A2/DISP FULL D5 9 25 OSC/OFF 10 24 CS CHAR1 11 23 NC NC 12 13 14 15 16 17 18 19 20 21 22 FN6675 Rev.1.00 Page 2 of 14 Jan 22, 2009 NC SEG c WR SEG k CHAR8 SEG g1 CHAR7 SEG e CHAR6 SEG m CHAR5 V DD V SEG l SS CHAR4 SEG g2 CHAR3 SEG b CHAR2 SEG i NC SEG f