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DS34C87TMX
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Texas Instruments RS-485 / RS-422 ICs, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# DS34C87TMX++**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-16++DS34C87TMX from Texas Instruments, in a SOIC-16. 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 | INPUT A | input | Channel A TTL/CMOS data input for the RS-422 differential line driver. |+| 2 | OUTPUT A - True | output | True RS-422 differential output for Channel A, which goes to TRI-STATE when the A/B control is low. |+| 3 | OUTPUT A - Inverting | output | Inverting RS-422 differential output for Channel A, which goes to TRI-STATE when the A/B control is low. |+| 4 | A/B CONTROL | input | Active-high TTL/CMOS enable for Channels A and B; a low level places their outputs in TRI-STATE. |+| 5 | OUTPUT B - Inverting | output | Inverting RS-422 differential output for Channel B, which goes to TRI-STATE when the A/B control is low. |+| 6 | OUTPUT B - True | output | True RS-422 differential output for Channel B, which goes to TRI-STATE when the A/B control is low. |+| 7 | INPUT B | input | Channel B TTL/CMOS data input for the RS-422 differential line driver. |+| 8 | GND | power_in | Ground pin (0 V) and reference for the device. |+| 9 | INPUT C | input | Channel C TTL/CMOS data input for the RS-422 differential line driver. |+| 10 | OUTPUT C - True | output | True RS-422 differential output for Channel C, which goes to TRI-STATE when the C/D control is low. |+| 11 | OUTPUT C - Inverting | output | Inverting RS-422 differential output for Channel C, which goes to TRI-STATE when the C/D control is low. |+| 12 | C/D CONTROL | input | Active-high TTL/CMOS enable for Channels C and D; a low level places their outputs in TRI-STATE. |+| 13 | OUTPUT D - Inverting | output | Inverting RS-422 differential output for Channel D, which goes to TRI-STATE when the C/D control is low. |+| 14 | OUTPUT D - True | output | True RS-422 differential output for Channel D, which goes to TRI-STATE when the C/D control is low. |+| 15 | INPUT D | input | Channel D TTL/CMOS data input for the RS-422 differential line driver. |+| 16 | VCC | power_in | Power supply pin, 5.0 V typical (operating range 4.50 V to 5.50 V per the operating conditions). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Interface |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `DS34C87TMX`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `ds34c87tmx-etched.step` / `ds34c87tmx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ds34c87tmx.step` / `ds34c87tmx.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/ds34c87t) (14 pp, sha256 `882c91d47fea0970`, 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/ds34c87tmx-datasheet.pdf)
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a low level places their outputs in TRI-STATE."+ },+ {+ "number": "5",+ "name": "OUTPUT B - Inverting",+ "type": "output",+ "description": "Inverting RS-422 differential output for Channel B, which goes to TRI-STATE when the A/B control is low."+ },+ {+ "number": "6",+ "name": "OUTPUT B - True",+ "type": "output",+ "description": "True RS-422 differential output for Channel B, which goes to TRI-STATE when the A/B control is low."+ },+ {+ "number": "7",+ "name": "INPUT B",+ "type": "input",+ "description": "Channel B TTL/CMOS data input for the RS-422 differential line driver."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground pin (0 V) and reference for the device."+ },+ {+ "number": "9",+ "name": "INPUT C",+ "type": "input",+ "description": "Channel C TTL/CMOS data input for the RS-422 differential line driver."+ },+ {+ "number": "10",+ "name": "OUTPUT C - True",+ "type": "output",+ "description": "True RS-422 differential output for Channel C, which goes to TRI-STATE when the C/D control is low."+ },+ {+ "number": "11",+ "name": "OUTPUT C - Inverting",+ "type": "output",+ "description": "Inverting RS-422 differential output for Channel C, which goes to TRI-STATE when the C/D control is low."+ },+ {+ "number": "12",+ "name": "C/D CONTROL",+ "type": "input",+ "description": "Active-high TTL/CMOS enable for Channels C and D; a low level places their outputs in TRI-STATE."+ },+ {+ "number": "13",+ "name": "OUTPUT D - Inverting",+ "type": "output",+ "description": "Inverting RS-422 differential output for Channel D, which goes to TRI-STATE when the C/D control is low."+ },+ {+ "number": "14",+ "name": "OUTPUT D - True",+ "type": "output",+ "description": "True RS-422 differential output for Channel D, which goes to TRI-STATE when the C/D control is low."+ },+ {+ "number": "15",+ "name": "INPUT D",+ "type": "input",+ "description": "Channel D TTL/CMOS data input for the RS-422 differential line driver."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply pin, 5.0 V typical (operating range 4.50 V to 5.50 V per the operating conditions)."+ }+ ],+ "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 pin table on page 7 is labeled 'PDIP or SOIC package' and gives one numbering for both, so it is"+ ],+ "pages_sent": 14,+ "cost_usd": 0.0592,+ "at": "2026-10-08T20:54:18"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/ds34c87t",+ "pages": 14,+ "sha256": "882c91d47fea0970",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "ds34c87tmx.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "ds34c87tmx-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "aa7e6a27d83ff6f8fd5a29122ab66d46246a558b25e9a9cfa088c4285faf84e2",+ "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]"+ }+}