FT121T-R FTDI, FT121T-R Datasheet - Page 32

• Manufacturer Part Number: FT121T-R
• Description: USB Interface IC USB CONTROLLER W/SPI SLAVE IC
• Manufacturer: FTDI

Specifications of FT121T-R

• Rohs: yes
• Product: USB 2.0
• Interface Type: SPI, USB
• Operating Supply Voltage: 4 V to 5.5 V
• Operating Supply Current: 3.9 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-16
• Minimum Operating Temperature: - 40 C

7
Figure 7-1 shows a reference application circuit for a USB bus-powered application. Figure 7-1 shows a
reference application circuit for a USB self-powered application.
Figure 7-1 FT121 bus powered application
Figure 7-2 FT121 self powered application
Application Information
SHIELD
SHIELD
5
5
1
2
3
4
1
2
3
4
Copyright © 2012 Future Technology Devices International Limited
470k
10nF
1M
Ferrite
Bead
100nF
FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC
100nF
47pF
47pF
1M
+
VCC
VCC3V3
+
VCC
VCC
47pF
4.7uF
47pF
1M
4.7uF
VCC3V3
VCC3V3
27R
27R
27R
27R
100nF
100nF
VCC
RESET_n
VCCIO
VBUS_S
VCC
VBUS_S
VOUT3V3
RESET_n
VCCIO
DM
DP
VCC
VOUT3V3
DM
DP
FT121
FT121
SUSPEND
SUSPEND
INT_n
SCLK
MISO
MOSI
SS_n
INT_n
SCLK
MISO
MOSI
SS_n
Document No.: FT_000648
10k
10k
Clearance No.: FTDI#
10k
10k
VCC3V3
Datasheet Version 1.0
VCC
100nF
100nF
GPIO
GPIO
SS#
SCLK
GPIO
GPIO
MISO
MOSI
SS#
SCLK
VCC
MISO
MOSI
VCC
MCU
MCU
312
32