Datasheet FT232R (FTDI) - 10

Document No.: FT_000053 FT232R USB UART IC Datasheet Version 2.11 Clearance No.: FTDI# 38 3.3 QFN-32 Package
32 25 1 24
1 30 FT I VCCIO TXD 19 VCC D 2 RXD YYXX-A 15 USBDM 32 RTS# 14 USBDP XXXXXXX 8 5 CTS# NC
8
FT232RQ
17
12 NC FT232RQ 31 DTR# 13 NC
9 16
6 25 DSR# NC 29 7
T O D R
NC
E O S T T T
DCD#
N S S C N X R S C T C O C I D # #
18 3
25 26 27 28 29 30 31 32
RESET# RI# 23 NC 22 CBUS0
AGND
27
24 1 VCCIO
OSCI
NC 23 2 RXD
28 21 OSCO CBUS1
CBUS0 22 3 RI#
16 3V3OUT
CBUS1
10
21 4 GND
A T CBUS2
GND 20 5 NC
G G G G E 11
VCC 19 6 DSR#
N N N N S CBUS3 D D D D T
RESET# 18 7 DCD#
9 CBUS4
GND 17 8 CTS#
24 4 17 20 26
16 15 14 13 12 11 10 9 3 U U N N C C C V S S C C B B B 3 B B O U U U D D S S S U M P 3 2 4 T
Figure 3.2 QFN-32 Package Pin Out and schematic symbol 3.4 QFN-32 Package Signal Description Pin No. Name Type Description
14 USBDP I/O USB Data Signal Plus, incorporating internal series resistor and 1.5kΩ pull up resistor to +3.3V. 15 USBDM I/O USB Data Signal Minus, incorporating internal series resistor.
Table 3.5 USB Interface Group Pin No. Name Type Description
+1.8V to +5.25V supply for the UART Interface and CBUS group pins (2, 3, 6,7,8,9,10 11, 21, 22, 30,31,32). In USB bus powered designs connect this pin to 3V3OUT to drive out at +3.3V levels, or connect to VCC to drive out at +5V CMOS 1 VCCIO PWR level. This pin can also be supplied with an external +1.8V to +2.8V supply in order to drive out at lower levels. It should be noted that in this case this supply should originate from the same source as the supply to VCC. This means that in bus powered designs a regulator which is supplied by the +5V on the USB bus should be Copyright © 2010 Future Technology Devices International Limited 10 Document Outline 1 Typical Applications 1.1 Driver Support 1.2 Part Numbers Note: Packing codes for xxxx is: 1.1 1.1 1.3 USB Compliant 2 FT232R Block Diagram 3 Device Pin Out and Signal Description 3.1 28-LD SSOP Package 3.2 SSOP Package Pin Out Description 3.3 QFN-32 Package 3.4 QFN-32 Package Signal Description 3.5 CBUS Signal Options 4 Function Description 4.1 Key Features 4.2 Functional Block Descriptions 5 Devices Characteristics and Ratings 5.1 Absolute Maximum Ratings 5.2 DC Characteristics 5.3 EEPROM Reliability Characteristics 5.4 Internal Clock Characteristics 5.5 Thermal Characteristics 6 USB Power Configurations 6.1 USB Bus Powered Configuration 1.1 1.1 6.2 Self Powered Configuration 6.3 USB Bus Powered with Power Switching Configuration 6.4 USB Bus Powered with Selectable External Logic Supply 7 Application Examples 7.1 USB to RS232 Converter 7.2 USB to RS485 Coverter 1.1 1.1 1.1 7.3 USB to RS422 Converter 7.4 USB to MCU UART Interface 1.1 1.1 1.1 7.5 LED Interface 7.6 Using the External Oscillator 8 Internal EEPROM Configuration 9 Package Parameters 9.1 SSOP-28 Package Dimensions 9.2 QFN-32 Package Dimensions 9.3 QFN-32 Package Typical Pad Layout 1.1 9.4 QFN-32 Package Typical Solder Paste Diagram 9.5 Solder Reflow Profile 10 Alternative Parts 11 Contact Information Appendix A – References Appendix B - List of Figures and Tables Appendix C - Revision History