Product | Integrated Circuit | MAX7219
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MAX7219 -Serially Interfaced 8-Digit LED Display Driver

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 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI、QSPI and MICROWIRE and has slew-rate-limited segment drivers to reduce EMI.

A convenient 4-wire serial interface connects to all common µPs. Individual digits may be addressed and updated without rewriting the entire display. The MAX7219/MAX7221 also allow the user to select code-B decoding or no-decode for each digit.

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.

Product Photos24-DIP
Standard Package15
CategoryIntegrated Circuits (ICs)
FamilyDisplay Drivers
Package / Case24-DIP (300 mil)
Digits or Characters8 Digits
Configuration7 Segment + DP
Display TypeLED
Interface4-Wire Serial
Current - Supply330mA
Voltage - Supply4 V ~ 5.5 V
Operating Temperature0°C ~ 70°C

 Key Features :

     10MHz Serial Interface

      Individual LED Segment Control

      Decode/No-Decode Digit Selection

      150µA Low-Power Shutdown (Data Retained)

      Digital and Analog Brightness Control

      Display Blanked on Power-Up

      Drive Common-Cathode LED Display

      Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221)

      SPI, QSPI, MICROWIRE Serial Interface (MAX7221)

     24-Pin DIP and SO Packages
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