TDSEMIC MAX7219EWG-TD

MAX7219/MAX7221 are compact, serial input/output, common-cathode display drivers that interface microprocessors with up to 8-digit 7-segment numeric LED displays, bar-graph displays, or 64 individual LEDs. On-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM to store each digit. A single external resistor sets the segment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and Microwire™ interfaces and features slew-rate-limited segment drivers to reduce EMI. The convenient 4-wire serial interface connects to all common microprocessors. 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 mode 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.

• 10MHz serial interface
• Individual LED segment control
• Decode/no-decode digit selection
• 150μA low-power shutdown (data retention)
• Digital and analog brightness control
• Display blanking on power-up
• Drives common-cathode LED displays
• Slew-rate-limited segment drivers for reduced EMI (MAX7221)
• SPI, QSPI, MICROWIRE serial interface (MAX7221)

• Bar graph displays
• Industrial controllers
• Panel meters
• LED matrix displays