component
TCA9539QPWRQ1
Public Made by Adomby adom
Texas Instruments I/O Expanders, TSSOP-24. 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
markdownTCA9539QPWRQ1
Texas Instruments · I/O Expanders · TSSOP-24
TCA9539QPWRQ1 from Texas Instruments, in a TSSOP-24. 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 | INT | tri_state | Interrupt open-drain output; connect to VCC through pull-up resistor. |
| 2 | A1 | input | Address input; connect directly to VCC or ground. |
| 3 | RESET | input | Active-low reset input; connect to VCC through pull-up resistor if no active connection is used. |
| 4 | P00 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 5 | P01 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 6 | P02 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 7 | P03 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 8 | P04 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 9 | P05 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 10 | P06 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 11 | P07 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 12 | GND | power_in | Ground. |
| 13 | P10 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 14 | P11 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 15 | P12 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 16 | P13 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 17 | P14 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 18 | P15 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 19 | P16 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 20 | P17 | bidirectional | P-port input-output with push-pull design structure, configured as input at power-on. |
| 21 | A0 | input | Address input; connect directly to VCC or ground. |
| 22 | SCL | input | Serial clock bus; connect to VCC through pull-up resistor. |
| 23 | SDA | bidirectional | Serial data bus, bidirectional; connect to VCC through pull-up resistor. |
| 24 | VCC | power_in | Supply voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-24 |
| Category | Interface |
| Pins | 24 |
CAD (KiCad official)
- Symbol:
TCA9539QPWRQ1 - Footprint:
Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm - 3D model: TSSOP-24 (KiCad packages3D, STEP)
- 3D model files:
tca9539qpwrq1-etched.step/tca9539qpwrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tca9539qpwrq1.step/tca9539qpwrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (41 pp, sha256
68ea62e6758f778d, retrieved 2026-09-26, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).