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MosChip MCS7820/MCS7840 2/4 port serial adapter driver

Hardware ID USB\VID_9710&PID_7840

Vendor
MosChip Semiconductor (VID 9710)
Device
MCS7820/MCS7840 2/4 port serial adapter (PID 7840)
Bus
USB
Drivers
7
Windows
Windows XPWindows VistaWindows 7Windows 8Windows 8.1Windows 10Windows 11

Recommended driver

ASIX USB2.0 to Serial Port Driver
Version 3.20.0.0, 3.18.1.0, 2.0.10.0 · Jan 24, 2018 · Windows XP–10 · 32-bit & 64-bit
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All drivers for VID_9710&PID_7840

DriverVersionDateWindowsBits
ASIX USB2.0 to Serial Port Driver 3.20.0.0, 3.18.1.0, 2.0.10.0 Jan 24, 2018 Windows XP–10 32-bit & 64-bit

HP packages for this device

Packages published by computer makers for their own models. They contain the same chip drivers, configured for those computers.

DriverVersionDateWindowsBits
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.3.0 May 13, 2026 Windows 11 64-bit
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.3.0 Apr 14, 2026 Windows 11 64-bit
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.3.819 Dec 23, 2025 Windows 11 64-bit
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.3.819 Dec 23, 2025 Windows 11 64-bit
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.2.0 May 25, 2023 Windows 10, 11 64-bit
ASIX USB 2.0 to Serial Port Driver (HP) 3.22.1.0 Mar 11, 2022 Windows 10, 11 64-bit

Is this your device?

  1. Press Win + X and open Device Manager.
  2. Right-click the device (usually under Other devices, with a yellow mark), choose Properties and open the Details tab.
  3. Select Hardware Ids in the list. If the first line starts with USB\VID_9710&PID_7840, the drivers above are for your device.

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