COSMAX3222

@@ -0,0 +1,60 @@+# COSMAX3222++**COSINE** · RS232 ICs · TSSOP-20++COSMAX3222 from COSINE, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | EN | input | Receiver Enable (active-LOW, EN\overline). Drive LOW for normal receiver operation; drive HIGH to place receiver outputs in high-impedance (tri-state). |+| 2 | C1+ | passive | Positive terminal of the voltage-doubler charge-pump flying capacitor (C1, typ. 0.1 uF). |+| 3 | V+ | power_out | +5.5 V output generated by the internal charge pump. Bypass to GND with a 0.1 uF capacitor (C3). |+| 4 | C1- | passive | Negative terminal of the voltage-doubler charge-pump flying capacitor (C1). |+| 5 | C2+ | passive | Positive terminal of the inverting charge-pump flying capacitor (C2, typ. 0.1 uF). |+| 6 | C2- | passive | Negative terminal of the inverting charge-pump flying capacitor (C2). |+| 7 | V- | power_out | -5.5 V output generated by the internal inverting charge pump. Bypass to GND with a 0.1 uF capacitor (C4). |+| 8 | T2OUT | output | RS-232 driver #2 output. Inverted RS-232-level (nominally +/-5 V) transmit line for connection to the serial port. |+| 9 | R2IN | input | RS-232 receiver #2 input. Accepts +/-15 V RS-232 signaling from the serial port; internal 5 kOhm pulldown commits output HIGH when input is open. |+| 10 | R2OUT | tri_state | TTL/CMOS receiver #2 output. Inverted logic-level output of receiver 2; tri-stated when EN\overline is HIGH. |+| 11 | NC | unconnected | No internal connection. Leave floating or tie to GND. |+| 12 | T2IN | input | TTL/CMOS driver #2 input. Must be a valid HIGH or LOW; no internal pullup, so unused inputs should be tied to VCC or GND. |+| 13 | T1IN | input | TTL/CMOS driver #1 input. Must be a valid HIGH or LOW; no internal pullup, so unused inputs should be tied to VCC or GND. |+| 14 | NC | unconnected | No internal connection. Leave floating or tie to GND. |+| 15 | R1OUT | tri_state | TTL/CMOS receiver #1 output. Inverted logic-level output of receiver 1; tri-stated when EN\overline is HIGH. |+| 16 | R1IN | input | RS-232 receiver #1 input. Accepts +/-15 V RS-232 signaling from the serial port; internal 5 kOhm pulldown commits output HIGH when input is open. |+| 17 | T1OUT | output | RS-232 driver #1 output. Inverted RS-232-level (nominally +/-5 V) transmit line for connection to the serial port. |+| 18 | GND | power_in | Device ground / 0 V reference. |+| 19 | VCC | power_in | Positive supply, 3.0 V to 5.5 V. Bypass to GND with a 0.1 uF capacitor. |+| 20 | SHDN | input | Shutdown control input (active-LOW, SHDN\overline). Drive HIGH for normal device operation. Drive LOW to shut down the drivers (high-Z outputs) and disable the on-chip charge pumps; supply current falls below 1 uA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | COSINE |+| Package | TSSOP-20 |+| Category | Interface |+| Pins | 20 |++## Ordering variants++- `COSMAX3222SR`+- `COSMAX3222`++## CAD (KiCad official)++- Symbol: `COSMAX3222`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [COSINE datasheet](docs/cosmax3222-datasheet.pdf) (11 pp, sha256 `fb0a0d94b62f6d61`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cosmax3222-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "cosmax3222",+  "version": "0.1.0",+  "type": "component",+  "description": "COSINE RS232 ICs, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "interface",+    "cosmax3222"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "cosmax3222.kicad_sym",+    "cosmax3222.kicad_mod",+    "cosmax3222.glb",+    "cosmax3222.step",+    "cosmax3222.lbr",+    "docs/hero.png",+    "docs/cosmax3222-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file