component
SN65C3222DWR
Public Made by Adomby adom
Texas Instruments RS232 ICs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+56@@ -0,0 +1,56 @@+# SN65C3222DWR++**Texas Instruments** · RS232 ICs · SOIC-20-300mil++SN65C3222DWR from Texas Instruments, in a SOIC-20-300mil. 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 | EN | input | Receiver enable input; setting EN high places all receiver outputs (ROUT) in the high-impedance state, and it accepts up to 5.5 V on the driver/control input range. |+| 2 | C1+ | passive | Positive terminal of charge-pump flying capacitor C1, which is 0.047 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V per the recommended test conditions. |+| 3 | V+ | power_out | Positive charge-pump output supply for the drivers, which is lowered toward VCC when the device is powered down. |+| 4 | C1− | passive | Negative terminal of charge-pump flying capacitor C1 connected to the internal charge pump. |+| 5 | C2+ | passive | Positive terminal of charge-pump flying capacitor C2, specified at 0.33 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V. |+| 6 | C2− | passive | Negative terminal of charge-pump flying capacitor C2 connected to the internal charge pump. |+| 7 | V− | power_out | Negative charge-pump output supply for the drivers, which is raised toward GND when the device is powered down. |+| 8 | DOUT2 | output | RS-232 line driver 2 output, with a driver output voltage range of −13.2 V to 13.2 V. |+| 9 | RIN2 | input | RS-232 receiver 2 input, rated for ±25 V; see review note on the RIN2/ROUT2 pin assignment. |+| 10 | ROUT2 | output | Receiver 2 CMOS output, which goes high-impedance when EN is high; see review note on the RIN2/ROUT2 pin assignment. |+| 11 | NC | unconnected | No internal connection. |+| 12 | DIN2 | input | Driver 2 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high. |+| 13 | DIN1 | input | Driver 1 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high. |+| 14 | NC | unconnected | No internal connection. |+| 15 | ROUT1 | output | Receiver 1 CMOS output, which goes high-impedance when EN is high. |+| 16 | RIN1 | input | RS-232 receiver 1 input, rated for ±25 V. |+| 17 | DOUT1 | output | RS-232 line driver 1 output, with a driver output voltage range of −13.2 V to 13.2 V. |+| 18 | GND | power_in | Network ground reference for all voltages on the device. |+| 19 | VCC | power_in | Supply voltage, specified at 3 V to 3.6 V or 4.5 V to 5.5 V, and the device operates from a single 3 V to 5.5 V supply. |+| 20 | PWRDOWN | input | Power-down control input; driving it low places the drivers in high impedance, disables the charge pump, and draws only 1 µA from the supply. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-20-300mil |+| Category | Interface |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `SN65C3222DWR`+- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`+- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)+- 3D model files: `sn65c3222dwr-etched.step` / `sn65c3222dwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn65c3222dwr.step` / `sn65c3222dwr.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/sn75c3222) (23 pp, sha256 `4ef64ba45a81c5df`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/sn65c3222dwr-datasheet.pdf)
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setting EN high places all receiver outputs (ROUT) in the high-impedance state, and it accepts up to 5.5 V on the driver/control input range."+ },+ {+ "number": "2",+ "name": "C1+",+ "type": "passive",+ "description": "Positive terminal of charge-pump flying capacitor C1, which is 0.047 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V per the recommended test conditions."+ },+ {+ "number": "3",+ "name": "V+",+ "type": "power_out",+ "description": "Positive charge-pump output supply for the drivers, which is lowered toward VCC when the device is powered down."+ },+ {+ "number": "4",+ "name": "C1−",+ "type": "passive",+ "description": "Negative terminal of charge-pump flying capacitor C1 connected to the internal charge pump."+ },+ {+ "number": "5",+ "name": "C2+",+ "type": "passive",+ "description": "Positive terminal of charge-pump flying capacitor C2, specified at 0.33 µF at VCC = 5 V or 0.1 µF at VCC = 3.3 V."+ },+ {+ "number": "6",+ "name": "C2−",+ "type": "passive",+ "description": "Negative terminal of charge-pump flying capacitor C2 connected to the internal charge pump."+ },+ {+ "number": "7",+ "name": "V−",+ "type": "power_out",+ "description": "Negative charge-pump output supply for the drivers, which is raised toward GND when the device is powered down."+ },+ {+ "number": "8",+ "name": "DOUT2",+ "type": "output",+ "description": "RS-232 line driver 2 output, with a driver output voltage range of −13.2 V to 13.2 V."+ },+ {+ "number": "9",+ "name": "RIN2",+ "type": "input",+ "description": "RS-232 receiver 2 input, rated for ±25 V; see review note on the RIN2/ROUT2 pin assignment."+ },+ {+ "number": "10",+ "name": "ROUT2",+ "type": "output",+ "description": "Receiver 2 CMOS output, which goes high-impedance when EN is high; see review note on the RIN2/ROUT2 pin assignment."+ },+ {+ "number": "11",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "12",+ "name": "DIN2",+ "type": "input",+ "description": "Driver 2 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high."+ },+ {+ "number": "13",+ "name": "DIN1",+ "type": "input",+ "description": "Driver 1 TTL/CMOS logic input, which is accepted up to 5.5 V and must be at least 2 V (3.3 V supply) or 2.4 V (5 V supply) high."+ },+ {+ "number": "14",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "15",+ "name": "ROUT1",+ "type": "output",+ "description": "Receiver 1 CMOS output, which goes high-impedance when EN is high."+ },+ {+ "number": "16",+ "name": "RIN1",+ "type": "input",+ "description": "RS-232 receiver 1 input, rated for ±25 V."+ },+ {+ "number": "17",+ "name": "DOUT1",+ "type": "output",+ "description": "RS-232 line driver 1 output, with a driver output voltage range of −13.2 V to 13.2 V."+ },+ {+ "number": "18",+ "name": "GND",+ "type": "power_in",+ "description": "Network ground reference for all voltages on the device."+ },+ {+ "number": "19",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, specified at 3 V to 3.6 V or 4.5 V to 5.5 V, and the device operates from a single 3 V to 5.5 V supply."+ },+ {+ "number": "20",+ "name": "PWRDOWN",+ "type": "input",+ "description": "Power-down control input; driving it low places the drivers in high impedance, disables the charge pump, and draws only 1 µA from the supply."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The datasheet conflicts on RIN2 and ROUT2 pin numbers. The top-view pin list (page 1) gives pin 9 = ; Pin numbers were assigned from the text-extracted top-view listing (1-10 down the left column, 20-11"+ ],+ "pages_sent": 23,+ "cost_usd": 0.1014,+ "at": "2026-10-08T17:59:46"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn75c3222",+ "pages": 23,+ "sha256": "4ef64ba45a81c5df",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "sn65c3222dwr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn65c3222dwr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 12.8,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "e442410e4803b0caca53ec63ac20a0cfbd82f83e5000584114b7dd3163b505ec",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}