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CH348Q on a board, in 3D

CH348Q

WCH (Nanjing Qinheng Microelectronics)

3.3V 360uA 55mA 6Mbps 8 USB 2.0 USB to UART LQFP-48(7x7) USB Converters ROHS

Extended
DatasheetJLCPCBLCSCwch/CH348Q
Category
USB Converters
Package
LQFP-48(7x7)
Pins
48

Overview

The CH348Q is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a LQFP-48(7x7) package with 48 pins. 3.3V 360uA 55mA 6Mbps 8 USB 2.0 USB to UART LQFP-48(7x7) USB Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH348Q, from EasyEDA) and its footprint (Package_QFP:LQFP-48_7x7mm_P0.5mm, from KiCad's library), ready for a KiCad board. 981 are in stock at JLCPCB (part C2979161). 3 open-source boards in 3 repositories on GitHub use it.

Symbol

NC1CFG2NC3NC4XI5XO6RESET7GND8VCC9CTS1/GPIO210RTS1/GPIO311TXD112RXD113ACT14TNOW1/GPI0915TXD616RXD617TXD318RXD319GND20TXD221RXD222GND23VCC24CTS3/GPIO625CTS2/GPIO426RTS2/GPIO527RTS3/GPIO728TNOW2/GPIO1029TXD030RXD031CTS0/GPIO032RTS0/GPIO133TNOW0/GPIO834GND35VCC36TXD737RXD738TNOW3/GPIO1139TXD440RXD441UD-42UD+43TEST44TXD545RXD546GND47VCC48
EasyEDA_Cloud:CH348QFrom EasyEDA

Footprint

Package_QFP:LQFP-48_7x7mm_P0.5mmFrom KiCad's library

Parameters

8
Applications Function
USB to UART
Current - Supply
55mA
Data Rate
6Mbps
Features
FIFO buffer；Programmable baud rate；Built-in clock generator；Hardware flow control support；Power-on reset
Number of Channels
8
Quiescent Supply Current
360uA
USB Protocol
USB 2.0
Voltage - Supply
3.3V

Order codes

1

Pinout

48
The pins of the CH348Q
PinNameType
1NCUnspecified
2CFGUnspecified
3NCUnspecified
4NCUnspecified
5XIUnspecified
6XOUnspecified
7RESETUnspecified
8GNDUnspecified
9VCCUnspecified
10CTS1/GPIO2Unspecified
11RTS1/GPIO3Unspecified
12TXD1Unspecified
13RXD1Unspecified
14ACTUnspecified
15TNOW1/GPI09Unspecified
16TXD6Unspecified
17RXD6Unspecified
18TXD3Unspecified
19RXD3Unspecified
20GNDUnspecified
21TXD2Unspecified
22RXD2Unspecified
23GNDUnspecified
24VCCUnspecified
25CTS3/GPIO6Unspecified
26CTS2/GPIO4Unspecified
27RTS2/GPIO5Unspecified
28RTS3/GPIO7Unspecified
29TNOW2/GPIO10Unspecified
30TXD0Unspecified
31RXD0Unspecified
32CTS0/GPIO0Unspecified
33RTS0/GPIO1Unspecified
34TNOW0/GPIO8Unspecified
35GNDUnspecified
36VCCUnspecified
37TXD7Unspecified
38RXD7Unspecified
39TNOW3/GPIO11Unspecified
40TXD4Unspecified
41RXD4Unspecified
42UD-Unspecified
43UD+Unspecified
44TESTUnspecified
45TXD5Unspecified
46RXD5Unspecified
47GNDUnspecified
48VCCUnspecified

Open-source boards using it

All 3
  • 2 layers110 × 82.5 mmOctoserial, the printed circuit board in 3D

    Octoserial

    superna9999/octoserial

    USB High-Speed to 8x RS-232 TTL level with the CH348Q IC.

    39 parts5Apache-2.0
  • 2 layers80 × 70 mmUSB TO 8 UART, the printed circuit board in 3D

    USB TO 8 UART

    LuizFernandoOliveira/Conversor-USB-para-8-UARTs

    This work is licensed under a [Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License][cc-by-nc-nd].

    93 parts
  • 2 layers100 × 100 mmUSB TO RS232 RS485, the printed circuit board in 3D

    USB TO RS232 RS485

    LuizFernandoOliveira/Conversor-USB-para-RS232-e-RS485

    This work is licensed under a [Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License][cc-by-nc-nd].

    124 parts

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A picture
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A picture that opens the part, for a README
[![CH348Q](https://pcbkit.io/embed/parts/wch/CH348Q.jpg?size=s)](https://pcbkit.io/parts/wch/CH348Q)

Questions

Is there a KiCad symbol and footprint for the CH348Q?

Yes. The symbol is EasyEDA_Cloud:CH348Q and the footprint Package_QFP:LQFP-48_7x7mm_P0.5mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH348Q?

LQFP-48(7x7), with 48 pins. Its footprint is drawn on this page.

Where is the CH348Q datasheet?

WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.

Where can I order the CH348Q?

JLCPCB lists it as part C2979161, with 981 in stock; the sellers' links on this page open their listings.

What can replace the CH348Q?

Parts like it in the library: the XR21V1414IM48TR-F by MaxLinear, the FT232HL-REEL by FTDI, the FE2.1 by TERMINUS and the FE1.1 by TERMINUS. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the CH348Q?

3 boards in 3 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8