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FT232RL Datasheet(PDF) 7 Page - Future Technology Devices International Ltd. |
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FT232RL Datasheet(HTML) 7 Page - Future Technology Devices International Ltd. |
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7 / 40 page  Copyright © Future Technology Devices International Limited 7 FT232R USB UART IC Datasheet Version 2.16 Document No.: FT_000053 Clearance No.: FTDI# 38 3 Device Pin Out and Signal Description 3.1 28-LD SSOP Package Figure 3.1 SSOP Package Pin Out and Schematic Symbol 3.2 SSOP Package Pin Out Description Note: The convention used throughout this document for active low signals is the signal name followed by# Pin No. Name Type Description 15 USBDP I/O USB Data Signal Plus, incorporating internal series resistor and 1.5kΩ pull up resistor to 3.3V. 16 USBDM I/O USB Data Signal Minus, incorporating internal series resistor. Table 3.1 USB Interface Group Pin No. Name Type Description 4 VCCIO PWR +1.8V to +5.25V supply to the UART Interface and CBUS group pins (1...3, 5, 6, 9...14, 22, 23). In USB bus powered designs connect this pin to 3V3OUT pin to drive out at +3.3V levels, or connect to VCC to drive out at 5V CMOS level. This pin can also be supplied with an external +1.8V to +2.8V supply in order to drive outputs 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 used. 7, 18, 21 GND PWR Device ground supply pins 17 3V3OUT Output +3.3V output from integrated LDO regulator. This pin should be decoupled to ground using a 100nF capacitor. The main use of this pin is to provide the internal +3.3V supply to the USB transceiver cell and the internal 1.5kΩ pull up resistor on USBDP. Up to 50mA can be drawn from USBDP USBDM 3V3OUT GND RESET# VCC GND NC AGND TEST OSCI OSCO CBUS1 CBUS0 TXD RTS# RXD DTR# VCCIO RI# GND NC DSR# DCD# CTS# CBUS4 CBUS2 CBUS3 1 14 15 28 FT232RL A G N D G N D G N D G N D T E S T 25 7 18 21 26 3V3OUT VCCIO 4 17 NC RESET# NC 24 19 8 TXD RXD RTS# CTS# DTR# DSR# DCD# RI# 1 5 3 11 2 9 10 6 CBUS0 CBUS3 CBUS2 CBUS1 23 22 13 14 20 16 15 USBDP USBDM VCC OSCI 27 OSCO 28 CBUS4 12 |
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