MAX6953EAX+

The MAX6953EAX+ is a 2-wire interfaced, 4-digit, 5 x 7 matrix LED display driver in 36 pin SSOP package. This compact cathode row display driver interfaces microprocessors to 5 x 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 drivers, row drivers and static RAM that stores each digit as well as font data for 24 user definable characters. The segment current for LEDs is set by an internal digit by digit digital brightness control. The device includes 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.

• Operating supply voltage range from 2.7V to 5.5V
• Operating temperature range from -40°C to 85°C
• 400Kbps 2-wire interface compatible with I2C
• Drives 4 monocolour or 2 bicolour cathode row 5 x 7 matrix displays
• Automatic blinking control for each segment
• 70μA low power shutdown (data retained) at TA = +25°C
• 16-step digital brightness control and display blanked on power-up
• Operating supply current of 12mA
• Master clock frequency of 4MHz (OSC internal oscillator) and 8MHz (OSC external clock)
• Dead clock protection frequency of 90KHz and segment current slew rate of 12.5mA/μs

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Power Management, Medical, Industrial

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