HX7219CDWRG

HX7219 is an integrated serial input/output common-cathode display driver that interfaces microprocessors with 8-digit 7-segment numeric LED displays, bar graph displays, or 64 individual LEDs. It includes an on-chip Type-B BCD encoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM for storing each digit's data. Only a single external resistor is required to set the segment current for all LEDs. A convenient 4-wire serial interface connects to all common microprocessors. Each digit is individually addressable, eliminating the need to rewrite the entire display during updates. HX7219 also allows users to select BCD decoding or no-decode mode on a per-digit basis. The device features a low-power shutdown mode drawing less than 150μA, analog and digital brightness control, a scan-limit register that allows users to display 1–8 digits, and a display-test mode that turns on all LEDs. Available in 24-pin DIP and SOP packages.

Applications

• Bar graph display
• Instrument panel
• Industrial control
• LED matrix display

Key features

• 10MHz serial interface connection
• Independent LED segment control
• Selectable decoded/non-decoded digit mode
• 150μA low-power shutdown mode
• Digital and analog brightness control
• High-voltage interrupt display
• Common-cathode LED display driver