component

FT240XQ-T

Public Made by Adom

by adom

FTDI USB ICs, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterface icsft240xq-tfactory-2.0.0extractor-text

Verified FT240XQ-T

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 25 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: FT240XQ-T · QFN-24-EP(4x4) · 25 pins
  • ✓copper: 25 copper pads, none touching another net
  • ✓datasheet: all 25 pin names found in the 41-page datasheet
  • ✓distributor: lcsc C1521578, digikey 768-1157-ND, mouser 895-FT240XQ-T
  • ✓family: QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-qrh3mzr8/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): the datasheet dimensions give no height or body size to compare (datasheet p.34)
  • ✓pads: 25 pins = 25 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 25 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ft240xq-t.kicad_sym✓ ft240xq-t.kicad_mod✓ ft240xq-t.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 9d ago
viewers ft240xq-t: viewers · Ray 9d ago
ft240xq-t-etched.glb Publish 0.1.0 · Ray 9d ago
ft240xq-t-etched.step ft240xq-t: factory component page (tier=lcsc) · Ray 9d ago
ft240xq-t-hero.glb ft240xq-t: hero GLB from the etched model (keeps the MPN mark) · Ray 9d ago
ft240xq-t-hero.overlay.json Publish 0.1.0 · Ray 9d ago
ft240xq-t.glb Publish 0.1.0 · Ray 9d ago
ft240xq-t.kicad_mod Publish 0.1.0 · Ray 9d ago
ft240xq-t.kicad_sym Publish 0.1.0 · Ray 9d ago
ft240xq-t.lbr Publish 0.1.0 · Ray 9d ago
ft240xq-t.step Publish 0.1.0 · Ray 9d ago
package.json Publish 0.1.0 · Ray 9d ago
page.json Set visibility: public · Ray 9d ago
README.md Publish 0.1.0 · Ray 9d ago
verification.json Verified: Published by the parts factory: tier lcsc, 25 pins · Ray 9d ago

FT240XQ-T

FTDI · USB ICs · QFN-24-EP(4x4)

FT240XQ-T from FTDI, in a QFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 D1 bidirectional FIFO Data Bus Bit 1.
2 D7 bidirectional FIFO Data Bus Bit 7.
3 GND power_in Device ground supply pin.
4 D5 bidirectional FIFO Data Bus Bit 5.
5 D6 bidirectional FIFO Data Bus Bit 6.
6 D3 bidirectional FIFO Data Bus Bit 3.
7 SIWU# input Active low input used to flush the IC buffer back to the PC (Send Immediate) or as a wake up signal when the PC is in suspend mode.
8 RD# input Enables the current FIFO data byte on D0...D7 when low and fetches the next FIFO data byte from the receive FIFO buffer when RD# goes from high to low.
9 WR input Writes the data byte on the D0...D7 pins into the transmit FIFO buffer when WR goes from high to low.
10 USBDP bidirectional USB Data Signal Plus, incorporating 1.5kΩ pull up resistor to 3.3V.
11 USBDM bidirectional USB Data Signal Minus.
12 3V3OUT power_out 3V3 output at 50mA that may be used to power VCCIO; when VCC is 3V3 this pin is an input and should be connected to pin 15.
13 RESET# input Active low reset pin used by an external device to reset the FT240X; can be left unconnected or pulled up to VCC if not required.
14 VCORE power_out +1V8 output that may be left unterminated.
15 VCC power_in +5V (or 3V3) supply to the device core.
16 GND power_in Device ground supply pin.
17 TXE# output When high, do not write data into the FIFO; when low, data can be written by strobing WR high then low; tristate during reset.
18 RXF# output When high, do not read data from the FIFO; when low, data is available to read by strobing RD# low then high; tristate during reset, and becomes an input during USB suspend if Remote Wakeup is enabled.
19 CBUS6 bidirectional Configurable CBUS I/O pin whose function is set in the device MTP memory (see Table 3.9).
20 CBUS5 bidirectional Configurable CBUS I/O pin whose function is set in the device MTP memory (see Table 3.9).
21 D0 bidirectional FIFO Data Bus Bit 0.
22 D4 bidirectional FIFO Data Bus Bit 4.
23 D2 bidirectional FIFO Data Bus Bit 2.
24 VCCIO power_in 1V8 - 3V3 supply for the IO cells.
25 GND power_in Centre pad on package base, internally connected to GND; connect to GND.

Key specifications

Parameter Value
Manufacturer FTDI
Package QFN-24-EP(4x4)
Category Interface ICs
Pins 25

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
VCC Operating Supply Voltage VCC 2.97 5 5.5 V Normal Operation 17
VCCIO Operating Supply Voltage VCC2 1.62 3.63 V 17
Operating Supply Current Icc1 8 8 8.4 mA Normal Operation 17
Operating Supply Current (suspend) Icc2 125 μA USB Suspend 17
3.3V regulator output 3V3 2.97 3.3 3.63 V VCC must be greater than 3V3 otherwise 3V3OUT is an input which must be driven with 3.3V 17
Output Voltage High (VCCIO=3.3V) Voh 2.97 V Ioh = +/-2mA, I/O Drive strength = 4mA 17
Output Voltage Low (VCCIO=3.3V) Vol 0 0.4 V Iol = +/-2mA, I/O Drive strength = 4mA 17
Input low Switching Threshold (VCCIO=3.3V) Vil 0.8 V LVTTL 18
Input High Switching Threshold (VCCIO=3.3V) Vih 2 V LVTTL 18
Input pull-up resistance (VCCIO=3.3V) Rpu 40 75 190 KΩ Vin = 0 18
Input pull-down resistance (VCCIO=3.3V) Rpd 40 75 190 KΩ Vin =VCCIO 18
Input Leakage Current (VCCIO=3.3V) Iin -10 1 10 μA Vin = 0 18
Tri-state output leakage current (VCCIO=3.3V) Ioz -10 1 10 μA Vin = 5.5V or 0 18
Output Voltage High (VCCIO=2.5V) Voh 2.25 V Ioh = +/-2mA, I/O Drive strength = 4mA 18
Output Voltage Low (VCCIO=2.5V) Vol 0 0.4 V Iol = +/-2mA, I/O Drive strength = 4mA 18
Input low Switching Threshold (VCCIO=2.5V) Vil 0.8 V LVTTL 19
Input pull-up resistance (VCCIO=2.5V) Rpu 40 75 190 KΩ Vin = 0 19
Input pull-down resistance (VCCIO=2.5V) Rpd 40 75 190 KΩ Vin =VCCIO 19
Input Leakage Current (VCCIO=2.5V) Iin -10 1 10 μA Vin = 0 19
Tri-state output leakage current (VCCIO=2.5V) Ioz -10 1 10 μA Vin = 5.5V or 0 19
Output Voltage High (VCCIO=1.8V) Voh 1.62 V Ioh = +/-2mA, I/O Drive strength = 4mA 19
Output Voltage Low (VCCIO=1.8V) Vol 0 0.4 V Iol = +/-2mA, I/O Drive strength = 4mA 19
Input low Switching Threshold (VCCIO=1.8V) Vil 0.77 V LVTTL 19
Input High Switching Threshold (VCCIO=1.8V) Vih 1.6 V LVTTL 20
Input pull-up resistance (VCCIO=1.8V) Rpu 40 75 190 KΩ Vin = 0 20
Input pull-down resistance (VCCIO=1.8V) Rpd 40 75 190 KΩ Vin =VCCIO 20
Input Leakage Current (VCCIO=1.8V) Iin -10 1 10 μA Vin = 0 20
Tristate output leakage current (VCCIO=1.8V) Ioz -10 1 10 μA Vin = 5.5V or 0 20
USB Output Voltage Low Vol 0.2 V USBDP, USBDM 20
USB Input low Switching Threshold Vil 0.8 V USBDP, USBDM 20
USB Input High Switching Threshold Vih 2 V USBDP, USBDM 20
Internal Clock Frequency of Operation 11.98 12 12.02 MHz Equivalent to +/-1667ppm 21
Internal Clock Period 83.19 83.33 83.47 ns 21
Internal Clock Duty Cycle 45 50 55 % 21
Storage Temperature -65 150 °C 16
Ambient Operating Temperature -40 85 °C Power Applied 16
VCC Supply Voltage VCC -0.3 5.5 V 16
VCCIO IO Voltage VCCIO -0.3 4 V 16
DC Input Voltage, USBDP and USBDM -0.5 3.63 V 16
DC Input Voltage, High Impedance Bi-directional -0.3 5.8 V powered from VCCIO 16
DC Output Current, Outputs 22 mA 16
WR Active Pulse Width T7 50 ns 13
WR to WR Pre-Charge Time T8 50 ns 13
Valid data setup to WR falling edge T9 20 ns Load = 30pF 13
Valid Data Hold Time from WR Inactive T10 0 ns Load = 30pF 13
WR Inactive to TXE# T11 5 25 ns 13
TXE# Inactive After WR Cycle T12 80 ns 13

CAD (KiCad official)

  • Symbol: FT240XQ-T
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: ft240xq-t-etched.step / ft240xq-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ft240xq-t.step / ft240xq-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: FTDI datasheet (41 pp, sha256 5765a1e6b849401b, retrieved 2026-10-31, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF