FT4232HQ - REEL FTDI, Future Technology Devices International Ltd, FT4232HQ - REEL Datasheet - Page 29

• Manufacturer Part Number: FT4232HQ - REEL
• Description: IC USB UART/MPSSE QUAD HS 64-QFN
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: USBmadeEZ-FIFOr

Specifications of FT4232HQ - REEL

• Features: USB to UART and/or SPI, I2C, JTAG
• Number Of Channels: 4, QUART
• Fifo's: 2048 Byte
• Protocol: RS-232, RS-422, RS-485
• Voltage - Supply: 3 V ~ 3.6 V
• With Auto Flow Control: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 64-QFN
• For Use With: 768-1031 - MOD USB HS FT4232H EVAL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1027-2; FT4232HQ - REEL

6
The following sections illustrate possible USB power configurations for the FT4232H.
All USB power configurations illustrated apply to both package options for the FT4232H device
6.1 USB Bus Powered Configuration
Bus Powered Application example 1: Bus powered configuration
Figure 6.1 Bus Powered Configuration Example 1
Figure 6.1 illustrates the FT4232H in a typical USB bus powered design configuration. A USB bus powered
device gets its power from the USB bus. In this application, the FT4232H requires that the VBUS (USB
+5V) is regulated down to +3.3V (using an LDO) to supply the VCCIO, VPLL, VPHY and VREGIN.
VREGIN is the +3.3V input to the on chip +1.8V regulator. The output of the on chip LDO regulator
(+1.8V) drives the FT4232H core supply (VCORE). This requires a minimum of a 3.3uF filter capacitor.
VBUS
FT4232H Configurations
GND
D+
D-
1
6
3
2
5
1
2
3
4
0?
CS
D
ORG
GND
SCL
GND
93C46
GND
100nF
VCC
DU
10K
Copyright © 2010 Future Technology Devices International Limited
Q
8
4
7
+3.3V
GND
10K
Vin
+3.3V
+3.3V
LDO +3.3V
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
GND
+3.3V
GND
10K
Vout
2.2K
+3.3V
GND
GND
100nF
12K
+3.3V
GND
EECLK
EEDATA
1
+1.8V
27pF
12MHz
1K
GND
3
4.7uF
GND
GND
27pF
GND
3.3uF
4.7uF
50
49
14
63
62
61
13
7
8
6
2
3
GND
VREGOUT
100nF 100nF
VREGIN
RESET#
DM
DP
REF
EECS
EECLK
OSCI
OSCO
TEST
EEDATA
GND
+1.8V +1.8V +1.8V +3.3V +3.3V +3.3V +3.3V
GND
100nF
+1.8V
Document No.: FT_000060
GND
100nF 100nF
Clearance No.: FTDI#78
GND
Datasheet Version 2.10
GND
SUSPEND#
+3.3V
PWREN#
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
CDBUS0
CDBUS1
CDBUS2
CDBUS3
CDBUS4
CDBUS5
CDBUS6
CDBUS7
DDBUS0
DDBUS1
DDBUS2
DDBUS3
DDBUS4
DDBUS5
DDBUS6
DDBUS7
GND
100nF 100nF 100nF 100nF
GND
16
17
18
19
21
22
23
24
26
27
28
29
30
32
33
34
38
39
40
41
43
44
45
46
48
52
53
54
55
57
58
59
60
36
GND
GND
29