MAX6954 4-Wire Interfaced, 2.7V To 5.5V LED Display Driver With I/O Expander And Key Scan

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 or which may be configured as a key-switch reader, which 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 MAX6954 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 a 2-wire interfaced version, refer to the MAX6955 data sheet. An evaluation kit (EV kit) for the MAX6955 is available.
By Maxim Integrated Products
MAX6954 's PackagesMAX6954 's pdf datasheet

MAX6954 Pinout, Pinouts
MAX6954 pinout,Pin out
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