Max7219 Serially Interfaced 8-Digit LED Display Driver

Description

Product Details General Description The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and Microwire™, and has slew-ratelimited segment drivers to reduce EMI. A convenient 3-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 codeB decoding or no-decode for each digit. The devices include a 150µA low power shutdown mode, analog and digital brightness control, a scanlimit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on Parametric specs for Display Drivers LCD or LED LED Display Type Common Cathode Interface Serial 3-Wire 10Mbit Digits or Char. 8-Digit Output Format 7 segment + DP Fonts Code B V SUPPLY (V) (min) 4 V SUPPLY (V) (max) 5.5 Package/Pins PDIP/24 Key Features 10MHz Serial Interface Individual LED Segment Control Decode/No-Decode Digit Selection 150µA Low-Power Shutdown (Data Retained) Digital and Analog Brightness Control Display Blanked on Power-Up Drive Common-Cathode LED Display Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221) SPI, QSPI, MICROWIRE Serial Interface (MAX7221) 24-Pin DIP and SO Packages Bar Graph Displays Industrial Controllers LED Matrix Displays Panel Meters

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