Analog Devices
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Serial driver for eight 7-segment digits or an 8×8 matrix — handles multiplexing, brightness and blanking, and chains over three wires.
| Part number | MAX7219 |
|---|---|
| Manufacturer | Analog Devices |
| Category | Integrated Circuits › Buffers & Line Drivers |
| Package | DIP-24 |
| Pins | 24 |
MAX7219 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | DIN | input | Serial data in |
| 2 | DIG0 | output | Digit 0 cathode drive |
| 3 | DIG4 | output | Digit 4 cathode drive |
| 4 | GND | ground | Ground |
| 5 | DIG6 | output | Digit 6 cathode drive |
| 6 | SEG B | output | Segment B |
| 7 | SEG C | output | Segment C |
| 8 | SEG D | output | Segment D |
| 9 | GND | ground | Ground |
| 10 | SEG E | output | Segment E |
| 11 | DIG2 | output | Digit 2 cathode drive |
| 12 | DIG7 | output | Digit 7 cathode drive |
| 13 | SEG G | output | Segment G |
| 14 | SEG DP | output | Decimal point |
| 15 | DIG1 | output | Digit 1 cathode drive |
| 16 | DIG3 | output | Digit 3 cathode drive |
| 17 | SEG F | output | Segment F |
| 18 | SEG A | output | Segment A |
| 19 | ISET | analog | Brightness-setting resistor to VCC |
| 20 | DIG5 | output | Digit 5 cathode drive |
| 21 | CLK | input | Serial clock |
| 22 | LOAD | input | Load, latches the shifted data |
| 23 | DOUT | output | Serial data out for chaining |
| 24 | V+ | power | Supply, 4–5.5V |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-24 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.