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DS_FT231X

FT231X USB TO FULL HANDSHAKE UART IC

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Table of Contents

FT231X USB TO FULL HANDSHAKE UART IC

Datasheet

Version 1.2

Document No.: FT_000565 Clearance No.: FTDI# 261

1 Typical Applications...................................................................... 2

1.1 Driver Support .................................................................................... 2

1.2 Part Numbers...................................................................................... 2

1.3 USB Compliant .................................................................................... 3

2 FT231X Block Diagram ................................................................. 4

3 Device Pin Out and Signal Description .......................................... 7

3.1 20-LD QFN Package ........................................................................... 7

3.1.1 QFN Package PinOut Description .................................................................................... 7

3.2 20-LD SSOP Package.......................................................................... 9

3.2.1 SSOP Package PinOut Description .................................................................................. 9

3.3 CBUS Signal Options ......................................................................... 10

4 Function Description................................................................... 13

4.1 Key Features..................................................................................... 13

4.2 Functional Block Descriptions ........................................................... 13

5 Devices Characteristics and Ratings ........................................... 16

5.1 Absolute Maximum Ratings............................................................... 16

5.2 ESD and Latch-up Specifications ....................................................... 16

5.3 DC Characteristics............................................................................. 17

5.4 MTP Memory Reliability Characteristics ............................................ 21

5.5 Internal Clock Characteristics ........................................................... 21

6 USB Power Configurations.......................................................... 22

6.1 USB Bus Powered Configuration ...................................................... 22

6.2 Self Powered Configuration .............................................................. 23

6.3 USB Bus Powered with Power Switching Configuration .................... 24

7 Application Examples ................................................................. 25

7.1 USB to RS232 Converter ................................................................... 25

7.2 USB to RS485 Coverter ..................................................................... 26

7.3 USB to RS422 Converter ................................................................... 27

7.4 USB Battery Charging Detection ....................................................... 28

7.5 LED Interface.................................................................................... 30

8 Internal MTP Memory Configuration ........................................... 32

8.1 Default Values .................................................................................. 32

8.2 Methods of Programming the MTP Memory....................................... 34

8.2.1 Programming the MTP memory over USB...................................................................... 34

8.3 Memory Map ..................................................................................... 34

Copyright © 2013 Future Technology Devices International Limited

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