MAX6955AAX

Product Summary

The max6955aax is a compact display driver that interfaces microprocessor to a mix of 7-segment, 14-segment, and 16-segment LED displays through an I2C-compatible 2-wire serial interface. The max6955aax 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. The key-switch reader automatically scans and debounces a matrix of up to 32 switches. It is ideal for: (1)Set-Top Boxes Automotive; (2)Panel Meters Bar Graph Displays; (3)White Goods Audio/Video Equipment.

Parametrics

max6955aax absolute maximum ratings: (1)Voltage (with Respect to GND)V+: -0.3V to +6V; (2)SCL, SDA, AD0, AD1: -0.3V to +6V; (3)All Other Pins: -0.3V to (V+ + 0.3V); (4)Current O0–O7 Sink Current: 935mA; (5)Junction Temperature: +150°C; (6)Storage Temperature Range: -65°C to +150°C; (7)Lead Temperature (soldering, 10s): +300°C.

Features

max6955aax features: (1)400kbps 2-Wire Interface Compatible with I2C; (2)2.7V to 5.5V Operation; (3)Drives Up to 16 Digits 7-Segment, 8 Digits 14-Segment, 8 Digits 16-Segment, 128 Discrete LEDs, or a Combination of Digit Types; (4)Drives Common-Cathode Monocolor and Bicolor LED Displays; (5)Built-In ASCII 104-Character Font for 14-Segment and 16-Segment Digits and Hexadecimal Font for 7-Segment Digits; (6)Automatic Blinking Control for Each Segment; (7)10μA (typ)Low-Power Shutdown (Data Retained); (8)16-Step Digit-by-Digit Digital Brightness Control; (9)Display Blanked on Power-Up; (10)Slew-Rate-Limited Segment Drivers for Lower EMI; (11)Five GPIO Port Pins Can Be Configured as KeySwitch Reader to Scan and Debounce Up to 32 Switches with n-Key Rollover; (12)IRQ Output when a Key Input is Debounced; (13)36-Pin SSOP and 40-Pin DIP Packages; (14)Automotive Temperature Range Standard.

Diagrams