FT4232HQ-REEL FTDI, FT4232HQ-REEL Datasheet - Page 18

• Manufacturer Part Number: FT4232HQ-REEL
• Description: USB Interface IC USB HS to Quad UART/ SPI/JTAG/I2C LQFN-64
• Manufacturer: FTDI
• Type: USB to High Speed UART/JTAG/SPI/I2Cr

Specifications of FT4232HQ-REEL

• Operating Supply Voltage: 1.8 V, 3.3 V
• Package / Case: QFN-64
• Description/function: USB High Speed to Dual UART/FIFO IC LQFP-64
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Supply Current: 70 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.10
Clearance No.: FTDI#78
4.3.2 RS422 Configuration
Figure 4.2 illustrates how the FT4232H can be configured as a dual RS422 interface. The FT4232H can
have all 4 channels connected as RS422, but only channel A and channel C are shown for clarity.
Figure 4.2 Dual RS422 Configuration
In this case both channel A and channel C are configured as UART operating at TTL levels and a level
converter device (full duplex RS485 transceiver) is used to convert the TTL level signals from the
FT4232H to RS422 levels. The PWREN# signal is used to power down the level shifters such that they
operate in a low quiescent current when the USB interface is in suspend mode.
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