MAX6955 Datasheet | Maxim Integrated

Description The MAX6955 is a pact display driver that interfaces microprocessors to a mix of 7-segment, 14-segment, and 16-segment LED displays through an I2C-patible 2-wire serial interface. The MAX6955 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. Included on chip are full 14- and 16-segment ASCII 104-character fonts, a hexadecimal font for 7-segment displays, multiplex scan circuitry, anode and cathode drivers, and static RAM that stores each digit. The maximum segment current for the display digits is set using a single external resistor. Digit intensity can be independently adjusted using the 16-step internal digital brightness control. The MAX6955 includes a low-power shutdown mode, a scan-limit register that allows the user to display from 1 to 16 digits, segment blinking (synchronized across multiple drivers, if desired), and a test mode, which forces all LEDs on. The LED drivers are slew-rate limited to reduce EMI. For an SPI-patible version, refer to the MAX6954 data sheet. An evaluation kit (EV kit) for the MAX6955 is available. Applications Set-Top Boxes Panel Meters White Goods Bar Graph Displays Audio/Video Equipment Ordering Information PART TEMP RANGE PIN-PACKAGE MAX6955AAX+ -40°C to +125°C 36 SSOP MAX6955ATL+ -40°C to +125°C 40 TQFN-EP- - EP = Exposed pad. +Denotes a lead(Pb)-free/Ro HS-pliant package. Pin Configurations and Typical Operating Circuits appear at end of data sheet. Benefits and Features - Simplifies Driving 5 x 7 Matrix LED Displays - Drives mon-Cathode Monocolor and Bicolor LED Displays - Drives Up to 16 Digits 7-Segment, 8 Digits 14-Segment, 8 Digits 16-Segment, 128 Discrete LEDs, or a...