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MAX7219CNG Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX7219CNG Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page General Description The MAX7219/MAX7221 are compact, serial input/out- put common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED dis- plays of up to 8 digits, bar-graph displays, or 64 indi- vidual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the seg- ment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has slew- rate-limited segment drivers to reduce EMI. A convenient 4-wire serial interface connects to all common µPs. Individual digits may be addressed and updated without rewriting the entire display. The MAX7219/MAX7221 also allow the user to select code- B decoding or no-decode for each digit. The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scan- limit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on. For applications requiring 3V operation or segment blinking, refer to the MAX6951 data sheet. Applications Features o 10MHz Serial Interface o Individual LED Segment Control o Decode/No-Decode Digit Selection o 150µA Low-Power Shutdown (Data Retained) o Digital and Analog Brightness Control o Display Blanked on Power-Up o Drive Common-Cathode LED Display o Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221) o SPI, QSPI, MICROWIRE Serial Interface (MAX7221) o 24-Pin DIP and SO Packages Serially Interfaced, 8-Digit LED Display Drivers ________________________________________________________________ Maxim Integrated Products 1 ( ) MAX7221 ONLY 8-DIGIT µP DISPLAY DIG 0–DIG 7 MOSI I/O SCK 18 1 12 13 9 4 DIN µP ISET 9.53k 8 DIGITS 8 SEGMENTS +5V 19 SEG A–G, SEG DP CLK LOAD (CS) GND V+ GND MAX7219 MAX7221 Typical Application Circuit Pin Configuration 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 DOUT SEG D SEG DP SEG E GND DIG 4 DIG 0 DIN TOP VIEW SEG C V+ ISET SEG G DIG 7 DIG 3 DIG 2 DIG 6 16 15 14 13 9 10 11 12 SEG B SEG F SEG A CLK ( ) MAX7221 ONLY LOAD (CS) DIG 1 DIG 5 GND DIP/SO MAX7219 MAX7221 19-4452; Rev 4; 7/03 PART MAX7219CNG MAX7219CWG MAX7219C/D 0°C to +70°C 0°C to +70°C 0°C to +70°C TEMP RANGE PIN-PACKAGE 24 Narrow Plastic DIP 24 Wide SO Dice* Ordering Information Ordering Information continued at end of data sheet. *Dice are specified at TA = +25°C. MAX7219ENG MAX7219EWG MAX7219ERG -40°C to +85°C -40°C to +85°C -40°C to +85°C 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP SPI and QSPI are trademarks of Motorola Inc. MICROWIRE is a trademark of National Semiconductor Corp. Bar-Graph Displays Industrial Controllers Panel Meters LED Matrix Displays For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. |
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