For LS/FS it does not matter, it will work. For HS, it depends on how you wire things up to the connectors. If you plan on also using standard cables, then it may be unstable. If the cable will be actual USB cable just terminated to a different connector, it will likely be fine. And absolutely no for anything USB3. Given that it is a keyboard, it will likely be FS. Answer from AlexTaradov on reddit.com
Amazon
amazon.com › db9-usb › s
Amazon.com: Db9 To Usb
db9 to usb adapter · db9 gender changer · Previous · 1 · 2 · 320 · Next · Visit the help section or contact us · Go back to filtering menu · Skip to main search results · Popular Shopping Ideas · Female · Adapter · Male · Cable · Eligible for Free Shipping ·
Reddit
reddit.com › r/networking › usb to female db9
r/networking on Reddit: Usb to female db9
August 25, 2023 - Just get a db9 female/female adapter and put it between the console porr and your usb serial adapter with db9m. You may need a db9 m/f null-modem adapter if the straight through connection doesn't work.
Can a DB9 connector be used as a usb connector
For LS/FS it does not matter, it will work. For HS, it depends on how you wire things up to the connectors. If you plan on also using standard cables, then it may be unstable. If the cable will be actual USB cable just terminated to a different connector, it will likely be fine. And absolutely no for anything USB3. Given that it is a keyboard, it will likely be FS. More on reddit.com
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April 21, 2025Usb to female db9
I have recently acquired an Allied Telesis gs950/24 switch. The only problem is that this is the older version (non-eco) and has a console port. The… More on reddit.com
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August 25, 2023Using a DB9 male to female cable to transfer USB signals?
would it be possible to transmit a USB 2 Low speed, sure. Full speed, maybe. High speed, highly unlikely. USB 3 Haha absolutely not, they need very tightly controlled differential impedance on the high speed pairs. More on reddit.com
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June 6, 2021Anybody have a good source for USB Mini-b to DB9 Female - For Brocade 7450?
Why not cut off the RJ45 end and make it serial? Or you could superglue the console to serial adapter to it so it doesn't come off.
More on reddit.com 6
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May 19, 2015How do I install my USB serial adapter in Windows XP? (.exe method)
Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack). To install the driver: Download the latest drivers from the StarTech.com website ( http://www.startech.com/Support ). You can find the part number and product ID on the product’s packaging. Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\ your_name \My Documents\Downloads). Once the download is complete, right-click the zip folder that you downloaded,
startech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232pro
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters
How do I confirm that Windows detects my USB device?
To confirm that Windows detects your USB device, complete the following: Press the Windows key+ R , type devmgmt.msc , and press Enter . In Device Manager , under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it. For example, a USB controller card would be under Universal Serial Bus controllers . Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.
startech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232pro
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters
How can I check if my USB device is properly detected by Mac OS?
To confirm that the Mac OS detects your USB device, complete the following: Click the Apple icon. Click About This Mac . Click More Info or System Report . Under the appropriate heading, confirm that your USB device is listed and that there isn't an error. For example, a network card would be under Ethernet Cards . You may need to refresh the System Information page after you plug in your device. To do so, press Command + R with the System Information page open. Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to
startech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232pro
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters
Videos
Amazon
amazon.com › Female-Serial-Adapter-Supports-Windows › dp › B017CZ3FZ2
Amazon.com: DTECH 6 Feet USB to RS232 DB9 Female Serial Adapter Cable Windows 11 10 8 7 Mac Linux Serial to USB 2.0 with Prolific PL2303 Chip : Electronics
Interface: USB type A male ; RS-232 Serial DB9 female connector (has male thumbscrews) It’s DB9 port (9 pin 2 row), not DB15 VGA port (15 pin 3 row ) RS232 Cable Length: 6 Feet Chip: prolific PL2303 9 pin RS232 to usb adapter converter cable supports Windows 10, 8, 7, XP, Vista, 2000, 98, MacOS8, Linux 2.4.0 USB 2.0, backward compatible Note: 1.
Best Buy
bestbuy.com › site › searchpage.jsp
usb to serial rs-232 db9 adapter cable - Best Buy
March 30, 2026 - Shop for usb to serial rs-232 db9 adapter cable at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up
Walmart
walmart.com › electronics › laptops
USB to RS232 DB9
Shop for USB to RS232 DB9 at Walmart.com. Save money. Live better
Metabee
metabee.com › home › cable assemblies › between series cable
DB9 Female to Mini USB Male RS232 Serial Data Cable 3.3ft(1m) - Renhotec
D-sub Cable DB9 Female to Mini USB Male Straight RS232 Serial Data Cable 3.3ft(1m)
Metal plated contacts and PVC outer covering
Suitable for various applications
100% conductivity test
Compliant with RoHS
Price $2.20
StarTech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232pro
1 ft USB to Serial DB9 Adapter Cable | USB Serial Adapters
1 ft USB to RS232 Serial DB9 Adapter Cable with COM Retention - TAA
1 ft USB to RS232 Serial DB9 Adapter Cable with COM Retention - TAA
Price $37.91
Reddit
reddit.com › r/askelectronics › can a db9 connector be used as a usb connector
r/AskElectronics on Reddit: Can a DB9 connector be used as a usb connector
April 21, 2025 -
For a keyboard build iam looking at different connectors I like the look of an db9 connector. Can I use this instead of a usb connector. So the protocol will be usb, cable will also be usb. I'll snip the usb type a of and replace it with a db9 and do this on the keyboard side to. Will this matter For the signal?
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Lmao why is everyone hating on this so hard. USB signals get sent over all sorts of non-standard connectors. As someone pointed out many industrial tooling use ruggedised locking connectors on the equipment that terminate with a USB A on the other. OP - yes this can “technically” work if you create a custom connector for your keyboard and recipient device. My only suggestion would be to fill all the unused pins with epoxy so the cable is somewhat keyed to your custom arrangement. Just reduces the chance it gets plugged into the wrong thing one day. But yes, this will work for a flippin keyboard. If it doesn’t - solder on a normal USB A. You had fun trying.
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For LS/FS it does not matter, it will work. For HS, it depends on how you wire things up to the connectors. If you plan on also using standard cables, then it may be unstable. If the cable will be actual USB cable just terminated to a different connector, it will likely be fine. And absolutely no for anything USB3. Given that it is a keyboard, it will likely be FS.
Staples
staples.com › computer-accessories-peripherals › cables-cable-accessories › adapters-splitters › startech 3.3' db-9 female to type a male usb dce adapter cable with ftdi, black
StarTech 3.3' DB-9 Female To Type A Male USB DCE Adapter Cable With FTDI, Black | Staples
StarTech 3.3' DB-9 Female To Type A Male USB DCE Adapter Cable With FTDI, Black
Get StarTech 3.3' DB-9 Female To Type A Male USB DCE Adapter Cable With FTDI, Black fast at Staples. Free next-day delivery when you spend $35+.
Price $40.49
US Converters
usconverters.com › serial-cable-db9-male-female
Serial Cable DB9, Male/Female, 6 ft - Straight-Through
Serial Cable DB9, Male/Female, 6 ft - Straight-Through. Usually this serial cable is used to extend an existing serial cable, since it has a male and a female port.
CSS Electronics
csselectronics.com › products › db9-db9-usb-power-adapter
DB9-DB9/USB Adapter Cable – CSS Electronics
DB9-DB9/USB Adapter Cable
Need to set up dual CAN/LIN telematics? This adapter lets your CANedge2 log 2 x CAN/LIN data - while powering a 3G/4G USB WiFi router. Buy now!
Price €30.00
Dtech
dtechelectronics.com › dtech-high-definition-usb-to-female-db9-serial-port-converter-cable-support-usb-2-0-standard-to-rs232-1-8m-cable_p327.html
High Resolution Dtech High Definition USB To Female DB9 Serial Port Converter Cable Support USB 2.0 Standard To RS232 1.8m Cable,Professional Dtech High Definition USB To Female DB9 Serial Port Converter Cable Support USB 2.0 Standard To RS232 1.8m Cable Manufacturers
Dtech High Definition USB to female DB9 serial port Converter Cable Support USB 2.0 Standard to RS232 1.8m Cable
Amazon
amazon.com › MEIRIYFA-Adapter-Converter-Cashier-Register › dp › B0CMTSTYTK
Amazon.com: MEIRIYFA USB Female to RS-232 DB9 Female Adapter Cable,USB 2.0 to Serial RS232 DB9(9-pin) Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras - 30cm : Electronics
MEIRIYFA USB 2.0 Female to RS232 Female DB9 Serial Cable connects a serial DB9 (9 PIN) device, such as a modem, to a USB port on your computer.
StarTech.com
startech.com › home › add-on cards & peripherals › serial cards & adapters › icusb232
USB to RS232 DB9 Serial Adapter Cable | USB Serial Adapters
USB to RS232 DB9 Serial Adapter Cable - M/M
USB to RS232 DB9 Serial Adapter Cable - M/M
Price $20.99
Amazon
amazon.com › OIKWAN-Adapter-Chipset-Supports-Windows › dp › B0DN6C4MH3
Amazon.com: OIKWAN 6ft USB to Serial Adapter,USB to RS232 DB9 Female Serial Cable with FT232 Chipset Supports Windows 11 10 8 7 Mac Linux : Electronics
High Quality: Gold plated USB 2.0 to RS232 Female DB9 serial cable connects with unique design enhances signal quality and reduces interference.USB port with 1Mbps data transfer rate.
eBay
ebay.com › itm › 254925803738
RS232 DB9 Female to USB 2.0 A Female Serial Cable Adapter Converter 8" Inch 25cm | eBay
RS232 DB9 Female to USB 2.0 A Female Serial Cable Adapter Converter 8" Inch 25cm
Allows you to connects a PC without serial port to a serial device as it adds a DB9 port to a laptop or desktop via USB port. 1x USB A female to DB9 female Converter Cable. Length: 25cm.
Price $3.03
Amazon
amazon.com › Female-Serial-Adapter-Chipset-Windows › dp › B0DF353578
Amazon.com: DBEIXIWEI USB to RS232 DB9 Female Serial Adapter Cable with PL2303 Chipset for Windows 11,10, 8, 7, Vista, XP : Electronics
Features: USB 2.0 to RS232 Female DB9 Serial Cable, Connect USB Port on your Computer to your RS232 DP 9Pin Devices. Simple installation, plug and play, Uses latest PL2303 Chipset.
Sayal
secure.sayal.com › store4 › prodetails.php
USB TO RS-232(SERIAL) ADAPTER 1F USB A TO DB9M - SAYAL Electronics and Hobbies
Usb To Rs-232(serial) Adapter 1f Usb A To Db9m
Usb Cable Male Type A To Db9 Rs232 Male Serial Cable Quickly Adds An Rs232 Port To Single Usb Cableeasily Connect With Most Of The Serial Modems , Digital C...
Price CA$52.95
US Converters
usconverters.com › db9-female-gender-changer
DB9 Gender Changer | db9 female connector | db9 to
This DB9 Gender Changer changes a DB9-pin male to a DB9-pin female, also called a db9 female connector or female to female serial adapter. We have many adapters which can change any DB9 to any male or female DB25 or DB9 connector.