MAX6955ATL+

The MAX6955ATL+ is a 2-wire interfaced, 2.7V to 5.5V LED display driver with I/O expander and key scan in 40 pin TQFN package. This compact display driver interfaces microprocessors to a mix of 7-segment, 14-segment and 16-segment LED displays through an I2C compatible 2-wire serial interface. The IC drives up to 16 digits 7-segment, 8 digits 14-segment, 8 digits 16-segment, or 128 discrete LEDs while functioning from a supply voltage as low as 2.7V. The driver includes five I/O expander or general-purpose I/O (GPIO) lines, some or all of which can be configured as a key-switch reader which automatically scans and debounces a matrix of up to 32 switches. It is used in set-top boxes, panel meters, white goods and bar graph displays.

• Simplifies driving 5 x 7 matrix LED displays, drives common cathode monocolour, bicolour LED display
• Standard 2-wire interface supports a variety of microprocessor architectures
• 400Kbps 2-wire I2C compatible interface
• Operating temperature range from -40°C to 125°C
• Integrated flexibility supports different application requirements, display blanked on power-up
• Built-in ASCII 104-character font for 14-segment & 16-segment digits
• Slew-rate-limited segment drivers for lower EMI, hexadecimal font for 7-segment digits
• 10µA (typ) low-power shutdown (data retained), IRQ output when a key input is debounced
• 16-step digit-by-digit digital brightness control, automatic blinking control for each segment
• Automotive temperature range standard covers usage in harsh environments

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