MAX6953

19-2312; Rev 1; 6/02 2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 ✕ 7 Matrix LED Display Driver General Description The MAX6953 is a compact cathode-row display driver that interfaces microprocessors to 5 ✕ 7 dot-matrix LED displays through an I2C™-compatible serial interface. The MAX6953 drives up to four digits (140 LEDs). Included on-chip are an ASCII 104-character font, multiplex scan circuitry, column and row drivers, and static RAM that stores each digit, as well as font data for 24 user-definable characters. The segment current for the LEDs is set by an internal digit-by-digit digital brightness control. The device includes a low-power shutdown mode, segment blinking (synchronized across multiple drivers, if desired), and a test mode that forces all LEDs on. The LED drivers are slew-rate limited to reduce EMI. For an SPI™-compatible version, refer to the MAX6952 data sheet. An EV kit is available for the MAX6952. o 2.7V to 5.5V Operation o Drives 4 Monocolor or 2 Bicolor Cathode-Row 5 ✕ 7 Matrix Displays o Built-In ASCII 104-Character Font o 24 User-Definable Characters Available o Automatic Blinking Control for Each Segment o 70µA Low-Power Shutdown (Data Retained) o 16-Step Digital Brightness Control o Display Blanked on Power-Up o Slew-Rate-Limited Segment Drivers for Lower EMI o 36-Pin SSOP and 40-Pin DIP Packages o Extended Temperature Range as Standard Features o 400kbps 2-Wire Interface Compatible with I2C MAX6953 Applications Message Boards Medical Equipment ...