The devices include a 150♚ 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.įor applications requiring 3V operation or segment blinking, refer to the MAX6951 data sheet.ĪDI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. The MAX7219/MAX7221 also allow the user to select code-B decoding or no-decode for each digit. Individual digits may be addressed and updated without rewriting the entire display. The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has slew-rate-limited segment drivers to reduce EMI.Ī convenient 4-wire serial interface connects to all common µPs.
Only one external resistor is required to set the segment current for all 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. 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.
