FT231XS-x datasheet(5/44 Pages) ETC2

Part #	FT231XS-x

Description	Future Technology Devices International Ltd FT231X

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FT231X USB TO FULL HANDSHAKE UART IC

Datasheet

Version 1.2

Document No.: FT_000565 Clearance No.:

FTDI# 261

Table of Contents

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

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