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Behavioural mixed-signal modelFT232RLft232rl

FT232RL USB-UART (virtual USB host)

Functional USB-UART model: virtual PC input is sent on TXD at 9600 baud, 8N1; CTSn pauses between bytes. USB enumeration and D+/D− packets are abstracted. VCCIO = 3.3 V, VCC = USB 5 V. No keyboard/command parser in the chip.

Datasheet ftdichip.com ↗Open the editor
TXDDTRnRTSnVCCIORXDRInGNDNC8DSRnDCDnCTSnCBUS4CBUS2CBUS3USBDPUSBDM3V3OUTGND18RESETnVCCGND21CBUS1CBUS0NC24AGNDTESTOSCIOSCOFT232RL
Schematic symbol

Key data

Category
Interfaces
Simulation model
Behavioural mixed-signal model
Manufacturer part number
FT232RL
Reference prefix
U
Pins
28
Land pattern
SSOP-28_5.3x10.2mm_P0.65mm

Simulation model

A behavioural model implements the interface of the chip (registers, protocol, timing) at its pins. The pins are connected to the analog circuit like CMOS pins.

Model
ft232rl
Supply pins
4 / 7

Pins 28

PinNameUse
1TXDOutput pinUART TXD: to the RX of the microcontroller
2DTRnPassive pinDTR: 100 nF to the MCU reset for auto-reset (Arduino)
3RTSnPassive pinRTS: flow control or reset
4VCCIOSupply pinI/O voltage: 3.3 V or 5 V, sets the UART levels
5RXDPassive pinUART RXD: from the TX of the microcontroller
6RInPassive pinRing indicator input
7GNDGround pinGround
8NC8Passive pinNot connected: leave open
9DSRnPassive pinDSR input
10DCDnPassive pinDCD input
11CTSnPassive pinCTS: flow control input
12CBUS4Passive pinCBUS4: configurable output (e.g. sleep)
13CBUS2Passive pinCBUS2: configurable output
14CBUS3Passive pinCBUS3: configurable output (e.g. power enable)
15USBDPPassive pinUSB D+
16USBDMPassive pinUSB D−
173V3OUTPassive pin3.3 V regulator output: 100 nF to GND (max. 50 mA)
18GND18Ground pinGround
19RESETnPassive pinReset, active low: leave open or tie to VCC
20VCCSupply pinSupply 5 V from USB VBUS: 100 nF + 4.7 µF
21GND21Ground pinGround
22CBUS1Passive pinCBUS1: configurable output (default RX LED)
23CBUS0Passive pinCBUS0: configurable output (default TX LED)
24NC24Passive pinNot connected: leave open
25AGNDGround pinGround
26TESTPassive pinTEST: tie to GND
27OSCIPassive pinOscillator in: leave open (internal oscillator)
28OSCOPassive pinOscillator out: leave open

PCB

Verified land patternSSOP-28_5.3x10.2mm_P0.65mm

FT232RL SSOP-28 (pin numbers per FTDI DS_FT232R / KiCad Interface_USB:FT232RL)