component
MAX7221CWG+T
Public Made by Adomby adom
Analog Devices Inc Maxim Integrated Digital Tube Drivers, SOIC-24-300mil. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMAX7221CWG+T
Analog Devices Inc Maxim Integrated · Digital Tube Drivers · SOIC-24-300mil
MAX7221CWG+T from Analog Devices Inc Maxim Integrated, in a SOIC-24-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | DIN | input | Serial-Data Input; data loaded into 16-bit shift register on CLK rising edge with 25ns setup time. |
| 2 | DIG 0 | output | Digit 0 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 3 | DIG 1 | output | Digit 1 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 4 | GND | power_in | Ground connection; both GND pins (4 and 9) must be connected to system ground. |
| 5 | DIG 2 | output | Digit 2 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 6 | DIG 3 | output | Digit 3 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 7 | DIG 4 | output | Digit 4 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 8 | DIG 5 | output | Digit 5 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 9 | GND | power_in | Ground connection; both GND pins (4 and 9) must be connected to system ground. |
| 10 | DIG 6 | output | Digit 6 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 11 | DIG 7 | output | Digit 7 drive line sinking 320mA max current from common cathode; high-impedance when off. |
| 12 | CS | input | Chip-Select Input (MAX7221 only); serial data loads into shift register while CS low, latches on CS rising edge. |
| 13 | CLK | input | Serial-Clock Input; 10MHz max rate; data shifts in on rising edge, out on falling edge; active only while CS low. |
| 14 | SEG A | output | Segment A drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 15 | SEG B | output | Segment B drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 16 | SEG C | output | Segment C drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 17 | SEG D | output | Segment D drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 18 | ISET | passive | Segment current reference; connect to V+ through RSET resistor (min 9.53kΩ) to set peak segment current at approximately 100× ISET. |
| 19 | V+ | power_in | Positive supply voltage; 4.0V to 5.5V operating range with 5V nominal; max 500µA logic and scan current. |
| 20 | SEG E | output | Segment E drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 21 | SEG F | output | Segment F drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 22 | SEG G | output | Segment G drive line sourcing 40mA max current to seven-segment display; high-impedance when off. |
| 23 | SEG DP | output | Decimal Point drive line sourcing 40mA max current to display; high-impedance when off. |
| 24 | DOUT | output | Serial-Data Output; data from DIN valid after 16.5 clock cycles with 25ns propagation delay; used for daisy-chaining. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | SOIC-24-300mil |
| Category | LED Drivers |
| Pins | 24 |
CAD (KiCad official)
- Symbol:
MAX7221CWG+T - Footprint:
Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm - 3D model: SOIC-24-300mil (KiCad packages3D, STEP)
- 3D model files:
max7221cwg-t-etched.step/max7221cwg-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max7221cwg-t.step/max7221cwg-t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices Inc Maxim Integrated datasheet (17 pp, sha256
f312632f10a27121, retrieved 2026-09-29, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).