FT232RN datasheet(7/40 Pages) FTDI

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FT232RN USB UART IC Datasheet

Version 1.0

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

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

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 3.1 USB Interface Group

Pin No.

Name

Type

Description

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 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,

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 main usage 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 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 3.2 Power and Ground Group

FT232RN Datasheet(PDF) 7 Page - Future Technology Devices International Ltd.

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