FT232RN datasheet(9/40 Pages) FTDI

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FT232RN USB UART IC Datasheet

Version 1.0

Document No.: FT_001521 Clearance No.: FTDI#571

3.3 QFN-32 Package

Figure 3.2 QFN-32 Package Pin Out and schematic symbol

3.4 QFN-32 Package Signal Description

Pin No.

Name

Type

Description

USBDP

I/O

USB Data Signal Plus, incorporating internal series resistor and 1.5kΩ pull

up resistor to +3.3V.

USBDM

I/O

USB Data Signal Minus, incorporating internal series resistor.

Table 3.5 USB Interface Group

Pin No.

Name

Type

Description

VCCIO

PWR

+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 level. This pin can also be supplied with an external +1.8V

to +2.8V supply 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 used.

4, 17,

GND

PWR

Device ground supply pins.

3V3OUT

Output

+3.3V output from integrated LDO regulator. This pin should be decoupled

to ground using a 100nF capacitor. The purpose of this output 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 this pin

to power external logic if required. This pin can also be used to supply the

VCCIO pin.

VCC

PWR

+3.3V to +5.25V supply to the device core. .

AGND

PWR

Device analogue ground supply for internal clock multiplier.

Table 3.6 Power and Ground Group

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