FT231XQ-T FTDI, FT231XQ-T Datasheet - Page 30

• Manufacturer Part Number: FT231XQ-T
• Description: USB Interface IC USB to Full Serial UART IC QFN-20
• Manufacturer: FTDI

Specifications of FT231XQ-T

• Rohs: yes
• Tradename: X-Chip

Figure 7.6 USB Battery Charging Detection (3 pin)
To calculate the equivalent resistance on the LTC4053 PROG pin select a charge current, then Res =
1500V/I
For more configuration options of the LTC4053 refer to:
AN_175_Battery Charging Over USB
Note: If the FT231X is connected to a standard host port such that the device is enumerated the battery
charge detection signal is inactive as the device will not be in suspend.
7.5 LED Interface
Any of the CBUS I/O pins can be configured to drive an LED. The FT231X has 3 configuration options for
driving LEDs from the CBUS. These are TXLED#, RXLED#, and TX&RXLED#. Refer to Section 3.3 for
configuration options.
0.1uF
EEPROM Setting
VBUS
GND
X-Chip Pin
CBUS0
CBUS1
CBUS2
VBUS
GND
chg
4.7uF
CN USB
SLD
VBUS
GND
D+
GND
Function
D-
ID
BCD#
SLEEP#
0R
PWREN#
N.F.
0.1uF
1
2
3
4
5
GND
Copyright © 2013 Future Technology Devices International Limited
VBUS
GND
10nF
600R/2A
VBUS
GND
De-acticate Sleep
Force Power Enable
Battery Charger Enable
Battery Options
1
2
3
4
5
27R
27R
0.1uF
3V3OUT
VCC
GND
CHRG
FAULT
TIMER
GND
GND
DM
DP
3V3OUT
RESET#
LTC4053EDD
ACPR
SHDN
PROG
X
X
BAT
NTC
VBUS
GND
9
8
7
6
10
JUMPER-2mm
3V3OUT
GND
FT231X USB TO FULL HANDSHAKE UART IC
2K2
CBUS0
CBUS1
CBUS2
VBUS
FT231X
4K32 1%
GND
16K5 1%
18
17
10
NTC
SLEEP#
JP1
SIP-3
BCD#
NTC
PWREN#
SLEEP#
Document No.: FT_000565 Clearance No.:
4K32 1%
PWREN#
VBUS
GND
GND
0A when in sleep
0.4A when enumerated
0.1A when not enumerated and not in sleep
1A when connected to a dedicated charger port
0.1uF
1K5 - 1%
BCD#
1-2
2-3
JP1
NCT Available
3V3OUT
GND
NCT Enabled
NCT Disabled (Default)
0.1uF
VBATT
GND
1R
1uF
GND
TB3.5mm
1
+
-
NCT
Datasheet
Version 1.2
FTDI# 261
30