component
MAX7221EWG+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
markdownMAX7221EWG+T
Analog Devices Inc Maxim Integrated · Digital Tube Drivers · SOIC-24-300mil
MAX7221EWG+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 is loaded into the internal 16-bit shift register on CLK rising edge. |
| 2 | DIG 0 | tri_state | Digit 0 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 3 | DIG 1 | tri_state | Digit 1 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 4 | GND | power_in | Ground; both GND pins must be connected. |
| 5 | DIG 2 | tri_state | Digit 2 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 6 | DIG 3 | tri_state | Digit 3 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 7 | DIG 4 | tri_state | Digit 4 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 8 | DIG 5 | tri_state | Digit 5 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 9 | GND | power_in | Ground; both GND pins must be connected. |
| 10 | DIG 6 | tri_state | Digit 6 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 11 | DIG 7 | tri_state | Digit 7 drive line that sinks current from display common cathode; high-impedance when turned off on MAX7221. |
| 12 | CS | input | Chip-Select Input (MAX7221 only); serial data loaded into shift register while CS is low; last 16 bits latched on CS rising edge. |
| 13 | CLK | input | Serial-Clock Input (10MHz maximum); data shifted into register on CLK rising edge; data clocked out DOUT on CLK falling edge. |
| 14 | SEG A | tri_state | Segment A drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 15 | SEG B | tri_state | Segment B drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 16 | SEG C | tri_state | Segment C drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 17 | SEG D | tri_state | Segment D drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 18 | ISET | passive | Connect to V+ through resistor RSET to set peak segment current; segment current approximately 100 times the current in ISET. |
| 19 | V+ | power_in | Positive supply voltage; connect to +5V. |
| 20 | SEG E | tri_state | Segment E drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 21 | SEG F | tri_state | Segment F drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 22 | SEG G | tri_state | Segment G drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 23 | SEG DP | tri_state | Decimal point drive sourcing current to display; high-impedance when turned off on MAX7221. |
| 24 | DOUT | output | Serial-Data Output; data into DIN valid at DOUT 16.5 clock cycles later; used to daisy-chain devices; never high-impedance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | SOIC-24-300mil |
| Category | LED Drivers |
| Pins | 24 |
CAD (KiCad official)
- Symbol:
MAX7221EWG+T - Footprint:
Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm - 3D model: SOIC-24-300mil (KiCad packages3D, STEP)
- 3D model files:
max7221ewg-t-etched.step/max7221ewg-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max7221ewg-t.step/max7221ewg-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).