component
TCA9539RGER
Public Made by Adomby adom
Texas Instruments I/O Expanders, VQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTCA9539RGER
Texas Instruments · I/O Expanders · VQFN-24-EP(4x4)
TCA9539RGER from Texas Instruments, in a VQFN-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 | P00 | bidirectional | Parallel I/O port P00 with push-pull design structure, configured as input at power-on |
| 2 | P01 | bidirectional | Parallel I/O port P01 with push-pull design structure, configured as input at power-on |
| 3 | P02 | bidirectional | Parallel I/O port P02 with push-pull design structure, configured as input at power-on |
| 4 | P03 | bidirectional | Parallel I/O port P03 with push-pull design structure, configured as input at power-on |
| 5 | P04 | bidirectional | Parallel I/O port P04 with push-pull design structure, configured as input at power-on |
| 6 | P05 | bidirectional | Parallel I/O port P05 with push-pull design structure, configured as input at power-on |
| 7 | P06 | bidirectional | Parallel I/O port P06 with push-pull design structure, configured as input at power-on |
| 8 | P07 | bidirectional | Parallel I/O port P07 with push-pull design structure, configured as input at power-on |
| 9 | GND | power_in | Ground reference connection |
| 10 | P10 | bidirectional | Parallel I/O port P10 with push-pull design structure, configured as input at power-on |
| 11 | P11 | bidirectional | Parallel I/O port P11 with push-pull design structure, configured as input at power-on |
| 12 | P12 | bidirectional | Parallel I/O port P12 with push-pull design structure, configured as input at power-on |
| 13 | P13 | bidirectional | Parallel I/O port P13 with push-pull design structure, configured as input at power-on |
| 14 | P14 | bidirectional | Parallel I/O port P14 with push-pull design structure, configured as input at power-on |
| 15 | P15 | bidirectional | Parallel I/O port P15 with push-pull design structure, configured as input at power-on |
| 16 | P16 | bidirectional | Parallel I/O port P16 with push-pull design structure, configured as input at power-on |
| 17 | P17 | bidirectional | Parallel I/O port P17 with push-pull design structure, configured as input at power-on |
| 18 | A0 | input | Address selection input pin, connect directly to VCC or ground |
| 19 | SCL | input | I2C serial clock input, connect to VCC through a pull-up resistor |
| 20 | SDA | tri_state | I2C serial data line (open-drain), connect to VCC through a pull-up resistor |
| 21 | VCC | power_out | Supply voltage (1.65 V to 5.5 V operating range) |
| 22 | INT | tri_state | Open-drain interrupt output, connect to VCC through a pull-up resistor |
| 23 | A1 | input | Address selection input pin, connect directly to VCC or ground |
| 24 | RESET | input | Active-low reset input, connect to VCC through a pull-up resistor if no active connection used |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-24-EP(4x4) |
| Category | Interface |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
TCA9539RGER - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm - 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
tca9539rger-etched.step/tca9539rger-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tca9539rger.step/tca9539rger.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (49 pp, sha256
fec29f61c247a467, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).