

Overview
The FUSB340TMX is a USB Converter made by onsemi in a X2-QFN-18 package with 19 pins. -40℃~+85℃ 1.5V~5V 10Gbps 2 USB 3.1、DP 1.3 X2-QFN-18 USB Converters ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:FUSB340TMX, from EasyEDA) and its footprint (EasyEDA_Cloud:TMLP-18_L2.8-W2.0-P0.40-BL-EP, from EasyEDA), ready for a KiCad board. 6,312 are in stock at JLCPCB (part C478457). 5 open-source boards in 5 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
9- Supply, least
- 1.5 V · VDD, recommended operating min · p. 4
- Supply, most
- 5 V · VDD, recommended operating max · p. 4
- Supply, absolute maximum
- 6 V · VDD, absolute max · p. 4
- Works from
- -40 °C · Operating ambient temperature min · p. 4
- Works up to
- 85 °C · Operating ambient temperature max · p. 4
- Takes working
- 12 mA · VDD, typical quiescent current, switches enabled, VDD = 5.0 V, IOUT = 0 · p. 5
- Takes at most
- 30 mA · VDD, max quiescent current, switches enabled, VDD = 5.0 V, IOUT = 0 · p. 5
- Takes asleep
- 1 mA · VDD, max high impedance quiescent current, VDD = 5.0 V · p. 5
- Data rate, most
- 10 Gbit/s · USB 3.1 SuperSpeed Gen 2, max data rate · p. 1
What it is and has
10- Bandwidth
- 10 GHz typical · p. 1
- USB switch
- USB 3.1 SuperSpeed, 5 Gbps and 10 Gbps · p. 1
- Insertion loss
- −1.0 dB typical at 2.5 GHz · p. 1
- ESD protection
- 2 kV HBM · p. 1
- Package
- 18 Lead TMLP · p. 1
- Pb−Free
- Yes · p. 1
- Supported protocol
- PCI Express, Gen 3 · p. 1
- Supported protocol
- SATA · p. 1
- Supported protocol
- Fibre Channel · p. 1
- Supported protocol
- Display Port 1.3 · p. 1
Specifications
51| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply Voltage VDD | min -0.5 · max 6 V | 4 | |
| DC Input Voltage (S, OE) (Note 1) VCNTRL | min -0.5 V | 4 | |
| DC Switch I/O Voltage (Notes 1, 2) VSW | min -0.3 · max 2.1 V | 4 | |
| DC Input Diode Current IIK | min -50 mA | 4 | |
| DC Switch Current Isw | max 25 mA | 4 | |
| Storage Temperature TSTG | min -65 · max 150 °C | 4 | |
| Moisture Sensitivity Level (JEDEC J−STD−020A) MSL | max 1 | 4 | |
| Human Body Model, JEDEC: JESD22−A114 ESD | All Pins | min 2 kV | 4 |
| IEC 61000−2−4, Level 4, for Switch Pins ESD | Contact | min 8 kV | 4 |
| IEC 61000−2−4, Level 4, for Switch Pins ESD | Air | min 15 kV | 4 |
| Charged Device Model, JESD22−C101 ESD | min 1 kV | 4 | |
| Supply Voltage VDD | min 1.5 · max 5 V | 4 | |
| Power Supply Slew Rate tRAMP(VDD) | min 100 · max 1000 ms/V | 4 | |
| Control Input Voltage (S, OE) (Note 3) VCNTRL | min 0 · max 5 V | 4 | |
| Switch I/O Voltage (Both SSUSB Switch Paths) VSW | min 0 · max 2 V | 4 | |
| Operating Temperature TA | min -40 · max 85 °C | 4 | |
| Clamp Diode Voltage S, OE VIK | IIN = −18 mA; VDD = 1.5 V | min -1.2 · max -0.6 V | 4 |
| Clamp Diode Current (Switch Pins) IIK | VIN = −0.3 V; VDD = 0 V | max 18 mA | 4 |
| Control Input Voltage High VIH | S, OE; VDD = 1.5 V | min 1.3 V | 4 |
| Control Input Voltage High VIH | S, OE; VDD = 3.6 V | min 1.4 V | 4 |
| Control Input Voltage High VIH | S, OE; VDD = 5.0 V | min 1.5 V | 4 |
| Control Input Voltage Low VIL | S, OE; VDD = 1.5 V | max 0.4 V | 4 |
| Control Input Voltage Low VIL | S, OE; VDD = 3.6 V | max 0.4 V | 4 |
| Control Input Voltage Low VIL | S, OE; VDD = 5.0 V | max 0.4 V | 4 |
| Control Input Leakage IIN | VSW = −0.6 to 2.0 V, VCNTRL = 0 to VDD; VDD = 5.0 V | min -500 · max 500 nA | 4 |
| Off−State Leakage for Open Data Paths IOZ | VSW = 0.0 ≤ DATA ≤ 2.0 V; VDD = 5.0 V | min -0.5 · max 0.5 mA | 4 |
| On−State Leakage for Closed Data Paths (Note 4) ICL | VSW = 0.0 ≤ DATA ≤ 2.0 V; VDD = 5.0 V; data switch closed with respective switch pin floating | min -0.5 · max 0.5 mA | 4 |
| Power−Off Leakage Current (All I/O Ports) IOFF | VSW = 0 V or 2.0 V; VDD = 0 V | min -500 · max 500 nA | 4 |
| Switch On Resistance RON | VSW = 0 V, ION = −8 mA; VDD = 1.5 V | typ 5.4 · max 8 W | 5 |
| Difference in RON Between Positive−Negative DRON | VSW = 0 V, ION = −8 mA; VDD = 1.5 V | typ 0.1 W | 5 |
| Flatness for RON RONF | VSW = 0 ≤ DATA ≤ 2.0 V, ION =−8 mA; VDD = 1.5 V | typ 0.9 W | 5 |
| Quiescent Supply Current ICC | VOE = 0, VSEL = 0 or VDD, IOUT = 0; VDD = 5.0 V | typ 12 · max 30 mA | 5 |
| Quiescent Supply Current (High Impedance) ICCZ | VSEL = X, VOE = VDD, IOUT = 0; VDD = 5.0 V | max 1 mA | 5 |
| Increase in Quiescent Supply Current per VCNTRL ICCT | VSEL or VOE = 1.5 V; VDD = 5.0 V | typ 5 · max 15 mA | 5 |
| Turn−On Time, S to Output tON | RL = 50 W, CL = 0 pF, VSW = 0 V, VSW = 0.6 V; VDD = 1.5 to 5.0 V | typ 350 · max 600 ns | 5 |
| Turn−Off Time, S to Output tOFF | RL = 50 W, CL = 0 pF, VSW = 0 V, VSW = 0.6 V; VDD = 1.5 to 5.0 V | typ 125 · max 300 ns | 5 |
| Enable Time, OE to Output tZHM,ZL | RL = 50 W, CL = 0 pF, VSW = 0.6 V; VDD = 1.5 to 5.0 V | typ 60 · max 150 us | 5 |
| Disable Time, OE to Output tLZM,HZ | RL = 50 W, CL = 0 pF, VSW = 0.6 V; VDD = 1.5 to 5.0 V | typ 35 · max 240 ns | 5 |
| Propagation Delay (Note 5) tPD | CL = 0 pF, RL = 50 W; VDD = 1.5 to 5.0 V | typ 60 ps | 5 |
| Break−Before−Make (Note 5) tBBM | RL = 50 W, CL = 0 pF, VSW1 = 0.6 V, VSW2 = −0.6 V; VDD = 1.5 to 5.0 V | min 100 · max 350 ns | 5 |
| Differential Off Isolation (Note 5) DOIRR | VS = 0dBm, RL = 50 W, f = 2.5 GHz; VDD = 3.6 V | typ -28 dB | 5 |
| Differential Off Isolation (Note 5) DOIRR | VS = 0 dBm, RL = 50 W, f = 5.0 GHz; VDD = 3.6 V | typ -25 dB | 5 |
| Differential Channel Crosstalk (Note 5) SDDNEXT | VS = 0 dBm, R = 50 W, f = 2.5 GHz; VDD = 3.6 V | typ -44 dB | 5 |
| Differential Channel Crosstalk (Note 5) SDDNEXT | VS = 0 dBm, R = 50 W, f = 5.0 GHz; VDD = 3.6 V | typ -40 dB | 5 |
| Differential Insertion Loss (Note 5) (All Data Paths) DIL | VIN = 0dBm, f = 2.5 GHz, RL = 50 W, CL = 0 pF; VDD = 3.6 V | typ -1 dB | 5 |
| Differential Insertion Loss (Note 5) (All Data Paths) DIL | VIN = 0 dBm, f = 5.0 GHz, RL = 50 W, CL = 0 pF; VDD = 3.6 V | typ -1.8 dB | 5 |
| Differential, −3 dB Bandwidth (Note 5) BW | VIN = 1 Vpk−pk, RL = 50 W, CL = 0 pF (Both Data Paths); VDD = 3.6 V | typ 10 GHz | 5 |
| Skew of Opposite Transitions of the Same Output (Note 5) tSK(P) | RPU = 50 W to VDD, CL = 0 pF; VDD = 3.6 V | typ 6 ps | 5 |
| Control Pin Input Capacitance (Note 5) CIN | VDD = 0 V, f = 1 MHz | typ 2.7 pF | 5 |
| On Capacitance (Note 5) CON | VDD = 3.3 V, f = 2.5 GHz | typ 0.5 pF | 5 |
| Off Capacitance (Note 5) COFF | VDD = 3.3 V, f = 2.5 GHz | typ 0.4 pF | 5 |
Pins, by the datasheet
18- 1 SSTXCOM−
- SuperSpeed TX− Common · p. 3
- 2 SSTXCOM+
- SuperSpeed TX+ Common · p. 3
- 3 GND
- Ground, connected to die attach pad. · p. 3
- 4 SSRXCOM−
- SuperSpeed RX− Common · p. 3
- 5 SSRXCOM+
- SuperSpeed RX+ Common · p. 3
- 6 S
- Switch Select: 0 = SW1, 1 = SW2. · p. 3
- 7 OE
- Output Enable: 0 = Switches Enabled, 1 = Switches Disabled. · p. 3
- 8 SSRX2+
- SuperSpeed RX2+ · p. 3
- 9 SSRX2−
- SuperSpeed RX2− · p. 3
- 10 SSRX1+
- SuperSpeed RX1+ · p. 3
- 11 SSRX1−
- SuperSpeed RX1− · p. 3
- 12 GND
- Ground, connected to die attach pad. · p. 3
- 13 SSTX2+
- SuperSpeed TX2+ · p. 3
- 14 SSTX2−
- SuperSpeed TX2− · p. 3
- 15 SSTX1+
- SuperSpeed TX1+ · p. 3
- 16 SSTX1−
- SuperSpeed TX1− · p. 3
- 17 VDD
- Device Power · p. 3
- 18 GND
- Ground · p. 3
Ordering codes, by the datasheet
1- FUSB340TMX
- 18−Lead, Quad, Ultra−ultrathin Molded Leadless Package (TMLP), 2.0 mm × 2.8 mm × 0.375 mm · −40 to +85°C operating temperature; 5,000 / Tape & Reel · p. 6
Parameters
11- Current - Supply
- 12mA
- Current - Supply(Max)
- 30mA
- Data Rate
- 10000Mbps
- Features
- Low-power mode;Shutdown mode
- Number of Channels
- 2
- Operating Temperature
- -40℃~+85℃
- Quiescent Supply Current
- 1uA
- Standby Current
- 1mA
- USB Protocol
- DP 1.3
- Voltage - Supply
- 1.5V~5V
- Voltage - Supply(Absolute Max)
- 6V
Order codes
1- FUSB340TMXLCSC C478457
Pinout
19| Pin | Name | Type |
|---|---|---|
| 1 | SSTXCOM- | Unspecified |
| 2 | SSTXCOM+ | Unspecified |
| 3 | GND | Unspecified |
| 4 | SSRXCOM- | Unspecified |
| 5 | SSRXCOM+ | Unspecified |
| 6 | S | Unspecified |
| 7 | OE# | Unspecified |
| 8 | SSRX2+ | Unspecified |
| 9 | SSRX2- | Unspecified |
| 10 | SSRX1+ | Unspecified |
| 11 | SSRX1- | Unspecified |
| 12 | GND | Unspecified |
| 13 | SSTX2+ | Unspecified |
| 14 | SSTX2- | Unspecified |
| 15 | SSTX1+ | Unspecified |
| 16 | SSTX1- | Unspecified |
| 17 | VDD | Unspecified |
| 18 | GND | Unspecified |
| 19 | GND | Unspecified |
Open-source boards using it
All 5- 6 layers25.4 × 50.8 mm

- 6 layers91.8 × 139.8 mm

- 6 layers81.5 × 50 mm

Picard
weiiwang01/picard
PiCard is a miniaturized Raspberry Pi Compute Module carrier board optimized for Linux server use cases.
166 parts8 - 6 layers48.5 × 50 mm

- 4 layers118.7 × 72.5 mm

Framework ExpansionBay IO Module
XPModder/Framework-ExpansionBay
Some stuff I made for the Framework Laptop 16 Expansion Bay
90 parts3
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Is there a KiCad symbol and footprint for the FUSB340TMX?
Yes. The symbol is EasyEDA_Cloud:FUSB340TMX and the footprint EasyEDA_Cloud:TMLP-18_L2.8-W2.0-P0.40-BL-EP, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the FUSB340TMX?
X2-QFN-18, with 19 pins. Its footprint is drawn on this page.
Where is the FUSB340TMX datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the FUSB340TMX?
JLCPCB lists it as part C478457, with 6,312 in stock; the sellers' links on this page open their listings.
Which open-source boards use the FUSB340TMX?
5 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.