MAX7219CNG+ PDIP24   MAX7219CWG+ SOP24

Datasheet: [ pdf ]

The MAX7219 is compact, serial input/output common-cathode display driver. It can drive 7-segment 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 a dual-port 8x8 SRAM memory to store each digit. Only one external resistor is required to set the segment current for all LEDs. Each digit can be code-B decoded (0,1,...,9, –, E, H, L, P, blank) or no-decoded. The MAX7219 also allow the user to control display brightness with an external resistor or digitally by the intensity register. 3-Wire Serial Interface is used to connect to all common uPs. Several MAX7219 can be casdaded to drive more than 8-digits.

Features:

- bus frequency: 10MHz

- display scan rate (8 digits scanned): 800Hz

- segment drive source current: -40mA (R_SET = 9.53kΩ)

- supply current:

normal operart (all segments on): 330mA

shutdown mode (display off): 150µA

- operating temperature: 0÷70°C

- supply voltage: 4.0÷5.5V

- package options: PDIP24, SOP24

Block Diagram:

Control Registers:

Shutdown normal operation / shutwodn mode selection

Mode code-B decoding / no-decoding selection

Intensity intensity control

Scan-Limit hown many digits are displayed (multiplexing)

Display-Test normal mode / display test selection

Application Circuit:

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