MAX7219/MAX7221 Display Drivers
Compact display drivers for interfacing microprocessors to LED displays
- Voltage (with respect to GND): V+ -0.3V to 6V
- DIN, CLK, LOAD, CS: -0.3V to 6V
- All Other Pins: -0.3V to (V+ + 0.3V)
- Current DIG 0–DIG 7 Sink Current: 500mA
- SEG A–G, DP Source Current: 100mA
- Operating Temperature Ranges: 0°C to +70°C
- Package Type: 24-Pin DIP and SO Packages
Features:
- 10MHz Serial Interface
- Individual LED Segment Control
- Decode/No-Decode Digit Selection
- 150µA Low-Power Shutdown
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 MAX7219 also allow the user to select codeB decoding or no-decode for each digit. The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scanlimit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.
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Images are for illustration only; actual product may vary.
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