General Description
●The MAX6954 is a compact display driver that interfaces microprocessors to a mix of 7-segment, 14-segment, and 16-segment LED displays through an SPI™- or QSPI™-compatible 4-wire serial interface. The serial interface may be cascaded through multiple devices. The MAX6954 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 GPIO) lines, some or all of which may be configured as a key switch reader, which automatically scans and debounces a matrix of up to 32 switches.
●Features
●♦ High-Speed 26MHz SPI/QSPI/MICROWIRE™-Compatible Serial Interface
●♦ 2.7V to 5.5V Operation
●♦ Drives Up to 16 Digits 7-Segment, 8 Digits 14-Segment, 8 Digits 16-Segment, 128 Discrete LEDs, or a Combination of Digit Types
●♦ Drives Common-Cathode Monocolor and Bicolor LED Displays
●♦ Built-In ASCII 104-Character Font for 14-Segment and 16-Segment Digits and Hexadecimal Font for 7-Segment Digits
●♦ Automatic Blinking Control for each Segment
●♦ 10µA (typ) Low-Power Shutdown (Data Retained)
●♦ 16-Step Digit-by-Digit Digital Brightness Control
●♦ Display Blanked on Power-Up
●♦ Slew-Rate Limited Segment Drivers for Lower EMI
●♦ Five GPIO Port Pins Can Be Configured as Key Switch Reader to Scan and Debounce Up to 32 Switches with n-Key Rollover
●♦ IRQ Output when a Key Input Is Debounced
●♦ 36-Pin SSOP and 40-Pin DIP and TQFN Packages
●♦ Automotive Temperature Range Standard
●Applications
● Set-Top Boxes
● Automotive
● Panel Meters
● Bar Graph Displays
● White Goods
● Audio/Video Equipment
