Key facts
- Brand
- Maxim
- Model
- MAX7221
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-04-12
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Maxim Integrated MAX7219/MAX7221 8‑Digit LED Display Drivers Datasheet
The MAX7219 and MAX7221 are compact serial‑input, common‑cathode LED display drivers that interface microprocessors to up to eight 7‑segment digits, bar‑graph displays, or 64 individual LEDs. They include an on‑chip BCD decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM for storing display data. Only a single external resistor is required to set the segment current for all LEDs.
The devices operate from a 5 V supply, support SPI, QSPI and MICROWIRE serial interfaces, and provide features such as low‑power shutdown, analog and digital brightness control, and a test mode that forces all LEDs on. They are offered in 24‑pin DIP, SO and CERDIP packages and are rated for temperatures from –40 °C to +85 °C depending on the part variant.
Maxim MAX7221 specifications
| Interface Types | SPI, QSPI, MICROWIRE |
|---|---|
| Maximum Supply Voltage (V+) | 5.5 V |
| Display Scan Rate | 500–1300 Hz |
Source: Maxim MAX7219/MAX7221 8-Digit LED Display Driver Datasheet
All Maxim MAX7221 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
Which serial interfaces are supported by the MAX7221?
The MAX7221 is compatible with SPI, QSPI, and Microwire interfaces.
From: Maxim MAX7219/MAX7221 Serially Interfaced 8‑Digit LED Display Driver Datasheet
What is the maximum supply voltage for the MAX7219/MAX7221?
The devices operate up to 5.5 V on the V+ supply pin.
From: Maxim MAX7219/MAX7221 8-Digit LED Display Driver Datasheet
How many digits can the driver control?
Both the MAX7219 and MAX7221 can drive up to eight digits.
From: Maxim MAX7219/MAX7221 8-Digit LED Display Driver Datasheet
How many digits can the MAX7219/MAX7221 drive?
Each device can control up to eight 7‑segment digits or an equivalent number of LED segments.
From: Maxim MAX7219/MAX7221 8‑Digit LED Display Driver Datasheet
What does shutdown mode do?
In shutdown mode the scan oscillator stops, segment current sources are pulled to ground, digit drivers are pulled to V+, and the display is blanked.
From: Maxim MAX7219/MAX7221 8‑Digit LED Display Driver Datasheet