MAX7221 Datasheet | Maxim Integrated

Description The MAX7219/MAX7221 are pact, serial input/ output mon-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 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is patible with SPI™, QSPI™, and MICROWIRE™, and has slew-rate-limited segment drivers to reduce EMI. A convenient 4-wire serial interface connects to all mon 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 - Bar-Graph Displays - Industrial Controllers - Panel Meters - LED Matrix Displays Pin Configuration 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 mon-Cathode LED Display - Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221) - SPI, QSPI, MICROWIRE Serial Interface (MAX7221) - 24-Pin DIP and SO Packages Ordering Information PART MAX7219CNG MAX7219CWG MAX7219C/D MAX7219ENG MAX7219EWG MAX7219ERG TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 24 Narrow Plastic DIP 24 Wide SO Dice- 24 Narrow Plastic DIP 24 Wide SO 24 Narrow CERDIP Ordering Information continued at end of data sheet. - Dice are specified at TA = +25°C. Typical...