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PL2303GR USB to RS485 Bridge Controller

PL2303GR USB to RS485 Bridge Controller

  • Full Compliant with USB Specification v2.0 (Full-Speed)
  • On-chip USB 1.1 transceiver and 5V to 3.3V regulator
  • On-chip 96MHz Clock Generator
  • Built-in RS485 Transceiver
      – Follow EIA/TIA-485 standards
      – Full UART RS485 interface pins (A, B)
      – Flexible baud rate support up to 10Mbps
      – Software flow control
  • Supports OTPROM (One-Time Programmable ROM) for USB device descriptors. OTPROM can be programmed directly through USB port.
  • Each IC has unique ID(for Serial Number)
  • 1024-byte bi-directional data buffers (768-byte receive/256-byte transmit).
  • Package: SSOP28
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Description

The PL2303GR is a low cost and high performance USB-to-RS485 Bridge Controller with built-in RS485 transceiver. The PL2303GR provides a convenient solution for connecting an RS-485 half-duplex asynchronous serial device to any Universal Serial Bus (USB) capable host. The PL2303GR highly compatible drivers could simulate the traditional COM port on most operating systems allowing the existing applications based on COM port to easily migrate and be made USB ready.

The PL2303GR integrates a high baud rate RS-485 transceiver that meets the EIA/TIA-485 communications interface specifications. The RS-485 transceiver build in TVS protection for bus terminals of ±15kv contact discharge and ±18kv air-gap discharge. It provides the bipolar output to the transmitters, and makes the transmitters to deliver the RS-485 output voltage levels. Under normal operation, PL2303GR operates at very low power consumption with guaranteed data rate up to 10Mbps.

Windows Driver Installer Setup Program ( Win7 / Win8.1 / Win10 / Win11)

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Installer version & Build date: 4.9.0.0 (2026-03-06)
Win11(64-bit) WDF WHQL Driver
– PL2303G: v5.2.11.0 (01/22/2026)
– PL2303HXD:v3.9.7.0 (12/30/2025)
(For PL2303 HXD, SA, RA GC, GS, GT, GL, GE , GD, GR versions)
– Windows 11 Certified WHQL Driver ( 21H1, 22H2, 23H2, 24H2, 25H2 versions)
– Auto-download driver via Windows Update (Windows 11)
Windows 7/8.1/10 (32&64-bit) WDF WHQL Driver
– PL2303G: v5.1.11.0 (01/21/2026)
– PL2303HXD: v3.8.43.0 (05/29/2024)
(For PL2303 HXD, SA, RA, GC, GS, GT, GL, GE , GD, GR versions)
– Windows 10 Certified WHQL Driver (TH1 1507, TH2 1511, RS1 1607, RS2 1703, RS3 1709, RS4 1803,RS5 1809,19H1 1903, 19H2 1909, 20H1 VB, 21H1, 22 H1versions)
– Windows 7, 8.1 Certified WHQL Driver
– Compatible with Windows Server 2008, 2008R2, 2012, 2012R2, 2016, 2019 , 2022
– Auto-download driver via Windows Update (Windows 7, 8.1, 10)
– Installer Language Support: English (default),
– For Prolific USB VID_067B&PID_2303, PID_2304, PID_23A3, PID_23B3, PID_23C3,PID_23D3,PID_23E3,PID_23F3,PID_2323.
– Includes Certification Report, User Manual, Driver Release Notes, CheckChipVersion Tool
– Installer supports silent install (add “/s” parameter when running program)

MAC OS Driver

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Mac OS X Universal Binary Driver v2.2.5 (PKG file format)
For Mac OS Sequoia (version 15)
For Mac OS Sonoma (version 14)
For Mac OS Ventura (version 13)
For Mac OS Monterey (version 12.4)
For Mac OS Big Sur (version 11) – see NOTE#1 below
For Mac OS Catalina (version 10.15) .
For Mac OS Mojave (version 10.14)
For Mac OS High Sierra (version 10.13)
For Mac OS X Sierra (version 10.12)
For Mac OS X El Capitan (version 10.11)
For Mac OS X Yosemite (version 10.10)
For Mac OS X Mavericks (version 10.9)
For PL2303 H/HX/HXD/EA/RA/SA/TA/TB chip versions
For Prolific USB VID_067B&PID_2303 Only
For PL2303GC, GS, GT, GL, GE , GD, GR chip versions
Includes Driver Installation Manual
NOTE#1: Mac OS High Sierra 10.13 introduces a new feature that requires user approval before loading new third-party kernel extensions. Go to System Preferences – Security & Privacy and click Allow.
https://developer.apple.com/library/content/technotes/tn2459/_index.html
NOTE#2: User can download PL2303 driver on Mac APP store. https://apps.apple.com/tw/app/pl2303-serial/id1624835354?l=en&mt=12

Linux Driver

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File Name Release Date Version File Size
PL2303G_Linux_Driver_v1.0.7.zip 2023/10/02 v1.0.7 485.39KB
Linux Kernel 5.5 and above already includes built-in drivers for PL2303G Chip.
If you's Linux kernel is v2.6.15 ~v5.4, Please update the PL2303G Linux driver via PL2303G_Linux_Driver_v1.0.7.zip

Android Driver

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PL2303G Android USB Host API SDK v1.0.0.10
Requirements:
———————
– USB Device with PL2303GC, PL2303GS, PL2303GT, PL2303GL, PL2303GE, PL2303GR, PL2303GD, PL2303GT-2AB controller chip
– Android-Powered Device (Tablet/Phones) with USB Host Mode Support
– Android 3.2 and above OS versions
SDK Package includes following:
———————————————————–
1. PL2303 Sample Test Android App Software
– Single port (PL2303GSimpleTest.apk)
– GPIO A Control (PL2303G_GPIO_A_Test.apk)
– GPIO B Control (PL2303G_GPIO_B_Test.apk)
– Multi-port (PL2303G_MultiSimpleTest.apk)
2. PL2303G Android Demo Apps User’s Manual
3. PL2303G Android Sample App Source Code
4. PL2303G Android Java Driver Library
5. PL2303G Android App Development Reference Documents
User can download PL2303G app on Google Play.
https://play.google.com/store/apps/dev?id=5801101758672272902

PL2303GR Data Sheet

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PL2303GR Data Sheet

Windows DCHU+DFx+Modem Standy Driver INF Setup ( Win10 / Win11)

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Windows 11 ( 64-bit ) WDF WHQL Driver: v5.2.10.2 (11/06/2025)
Windows 10 ( 32 / 64 bit ) WDF WHQL Driver: v5.1.10.2 (11/03/2025)
(For PL2303 GC, GS, GT, GL, GE , GD, GR versions)
– Windows 11 Certified WHQL Driver ( 25H2 versions)
– Windows 11 Certified WHQL Driver ( 24H2 versions)
– Windows 11 Certified WHQL Driver ( 21H2 versions)
– Windows 10 Certified WHQL Driver ( 2004 versions)
– Windows 10 Certified WHQL Driver ( 1903 versions)
– Windows 10 Certified WHQL Driver ( 1809 versions)
– Auto-download driver via Windows Update (Windows 11)
DCHU: https://learn.microsoft.com/en-us/windows-hardware/drivers/develop/dch-example
Directed PoFx (DFx): https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/introduction-to-the-directed-power-management-framework
Modem Standy: https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby

Windows ARM64 Driver Installer Setup Program ( Win10 / Win11)

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Installer version & Build date: 6.5.0.0 (2026-02-06)
PL2303G ARM : WDF WHQL Driver: v5.3.11.0 (01/28/2026)
(For PL2303 GC, GS, GT, GL, GE , GD, GR versions)
– Driver Certified for Windows 11 25H2 ARM (version 25H2 ARM)
– Auto-download driver via Windows Update (Windows 11)
– Installer Language Support: English (default),
– For Prolific USB VID_067B&PID_23A3, PID_23B3, PID_23C3,PID_23D3,PID_23E3,PID_23F3,PID_2323.
– Includes Certification Report, User Manual, Driver Release Notes
– Installer supports silent install (add “/s” parameter when running program)

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