component
ST75185CTR
Public Made by Adomby adom
STMicroelectronics RS232 ICs, TSSOP-20. 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
markdownST75185CTR
STMicroelectronics · RS232 ICs · TSSOP-20
ST75185CTR from STMicroelectronics, in a TSSOP-20. 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 | VDD | power_in | Positive supply voltage (+12V nominal), recommended operating range 7.5V to 15V. |
| 2 | RA1 | input | First receiver input, accepts RS-232 signal voltage range -30V to +30V. |
| 3 | RA2 | input | Second receiver input, accepts RS-232 signal voltage range -30V to +30V. |
| 4 | RA3 | input | Third receiver input, accepts RS-232 signal voltage range -30V to +30V. |
| 5 | DY1 | output | First driver output, produces RS-232 signal levels with output voltage -7.5V to +7.5V. |
| 6 | DY2 | output | Second driver output, produces RS-232 signal levels with output voltage -7.5V to +7.5V. |
| 7 | RA4 | input | Fourth receiver input, accepts RS-232 signal voltage range -30V to +30V. |
| 8 | DY3 | output | Third driver output, produces RS-232 signal levels with output voltage -7.5V to +7.5V. |
| 9 | RA5 | input | Fifth receiver input, accepts RS-232 signal voltage range -30V to +30V. |
| 10 | VSS | power_in | Negative supply voltage (-12V nominal), recommended operating range -15V to -7.5V. |
| 11 | GND | power_in | Ground connection for analog and logic circuits. |
| 12 | RY5 | output | Fifth receiver output, TTL/CMOS level with high voltage 2.6V to 5V and low voltage 0.2V to 0.45V. |
| 13 | DA3 | input | Third driver input, TTL/CMOS logic level, recommended voltage range 0V to VCC. |
| 14 | RY4 | output | Fourth receiver output, TTL/CMOS level with high voltage 2.6V to 5V and low voltage 0.2V to 0.45V. |
| 15 | DA2 | input | Second driver input, TTL/CMOS logic level, recommended voltage range 0V to VCC. |
| 16 | DA1 | input | First driver input, TTL/CMOS logic level, recommended voltage range 0V to VCC. |
| 17 | RY3 | output | Third receiver output, TTL/CMOS level with high voltage 2.6V to 5V and low voltage 0.2V to 0.45V. |
| 18 | RY2 | output | Second receiver output, TTL/CMOS level with high voltage 2.6V to 5V and low voltage 0.2V to 0.45V. |
| 19 | RY1 | output | First receiver output, TTL/CMOS level with high voltage 2.6V to 5V and low voltage 0.2V to 0.45V. |
| 20 | VCC | power_in | Logic supply voltage (+5V), recommended operating range 4.5V to 5.5V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TSSOP-20 |
| Category | Interface |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
ST75185CTR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
st75185ctr-etched.step/st75185ctr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st75185ctr.step/st75185ctr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (22 pp, sha256
33e8504146e92ab3, 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).