Description

The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs.The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scan-limit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.

Features:
1.Digital and Analog Brightness Control
2.10MHz Serial Interface
3.Individual LED Segment Control
4.Decode/No-Decode Digit Selection
5.150µA Low-Power Shutdown
6.Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221)
7.SPI, QSPI, MICROWIRE Serial Interface (MAX7221)
8.24-Pin DIP and SO Packages