USB Type-A ↔ Serial (DB-9)
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Compatibility check and signal path analysis
Adapter Required
These connectors are not directly compatible. An adapter or converter cable is needed.
Recommended: USB to Serial (RS-232) adapter
Signal Path
USB Type-A
Family
USB
Form Factor
Rectangular flat
Pin Count
4
Reversible
No
Serial (DB-9)
Family
Legacy Data
Form Factor
D-sub 9-pin
Pin Count
9
Reversible
No
Notes
Requires driver. Essential for network equipment, industrial machines, and scientific instruments. FTDI or Prolific chipset recommended.