component
SN74LV221APWR
Public Made by Adomby adom
Texas Instruments Monostable Multivibrators, TSSOP-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 @@+# SN74LV221APWR++**Texas Instruments** · Monostable Multivibrators · TSSOP-16++SN74LV221APWR from Texas Instruments, in a TSSOP-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 | 1A | input | Channel 1 falling-edge trigger input when 1B is high; hold low when using the other input methods. |+| 2 | 1B | input | Channel 1 rising-edge trigger input when 1A is low; hold high when using the other input methods. |+| 3 | 1CLR | input | Channel 1 clear input: a rising edge triggers when 1A is low and 1B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods. |+| 4 | ~{1Q} | output | Channel 1 inverted output of the monostable multivibrator. |+| 5 | 2Q | output | Channel 2 output of the monostable multivibrator. |+| 6 | 2Cext | passive | Channel 2 external capacitor negative connection; the datasheet lists no electrical type for this pin. |+| 7 | 2Rext/Cext | passive | Channel 2 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC. |+| 8 | GND | power_in | Ground. |+| 9 | 2A | input | Channel 2 falling-edge trigger input when 2B is high; hold low when using the other input methods. |+| 10 | 2B | input | Channel 2 rising-edge trigger input when 2A is low; hold high when using the other input methods. |+| 11 | 2CLR | input | Channel 2 clear input: a rising edge triggers when 2A is low and 2B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods. |+| 12 | ~{2Q} | output | Channel 2 inverted output of the monostable multivibrator. |+| 13 | 1Q | output | Channel 1 output of the monostable multivibrator. |+| 14 | 1Cext | passive | Channel 1 external capacitor negative connection; the datasheet lists no electrical type for this pin. |+| 15 | 1Rext/Cext | passive | Channel 1 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC. |+| 16 | VCC | power_in | Power supply, 2 V to 5.5 V operation per the recommended operating conditions. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74LV221APWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)+- 3D model files: `sn74lv221apwr-etched.step` / `sn74lv221apwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lv221apwr.step` / `sn74lv221apwr.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/lit/ds/symlink/sn74lv221a.pdf) (31 pp, sha256 `8e179f4af7bb64d9`, retrieved 2026-10-07, tier: manufacturer)+- **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/sn74lv221apwr-datasheet.pdf)
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hold low when using the other input methods."+ },+ {+ "number": "2",+ "name": "1B",+ "type": "input",+ "description": "Channel 1 rising-edge trigger input when 1A is low; hold high when using the other input methods."+ },+ {+ "number": "3",+ "name": "1CLR",+ "type": "input",+ "description": "Channel 1 clear input: a rising edge triggers when 1A is low and 1B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods."+ },+ {+ "number": "4",+ "name": "~{1Q}",+ "type": "output",+ "description": "Channel 1 inverted output of the monostable multivibrator."+ },+ {+ "number": "5",+ "name": "2Q",+ "type": "output",+ "description": "Channel 2 output of the monostable multivibrator."+ },+ {+ "number": "6",+ "name": "2Cext",+ "type": "passive",+ "description": "Channel 2 external capacitor negative connection; the datasheet lists no electrical type for this pin."+ },+ {+ "number": "7",+ "name": "2Rext/Cext",+ "type": "passive",+ "description": "Channel 2 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground."+ },+ {+ "number": "9",+ "name": "2A",+ "type": "input",+ "description": "Channel 2 falling-edge trigger input when 2B is high; hold low when using the other input methods."+ },+ {+ "number": "10",+ "name": "2B",+ "type": "input",+ "description": "Channel 2 rising-edge trigger input when 2A is low; hold high when using the other input methods."+ },+ {+ "number": "11",+ "name": "2CLR",+ "type": "input",+ "description": "Channel 2 clear input: a rising edge triggers when 2A is low and 2B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods."+ },+ {+ "number": "12",+ "name": "~{2Q}",+ "type": "output",+ "description": "Channel 2 inverted output of the monostable multivibrator."+ },+ {+ "number": "13",+ "name": "1Q",+ "type": "output",+ "description": "Channel 1 output of the monostable multivibrator."+ },+ {+ "number": "14",+ "name": "1Cext",+ "type": "passive",+ "description": "Channel 1 external capacitor negative connection; the datasheet lists no electrical type for this pin."+ },+ {+ "number": "15",+ "name": "1Rext/Cext",+ "type": "passive",+ "description": "Channel 1 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply, 2 V to 5.5 V operation per the recommended 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: Pin table gives no electrical type ('—') for the external capacitor/resistor pins; typed as passive ; Pin names 4 and 12 are printed as '1 Q' and '2 Q' (inverted outputs) and pins 5 and 13 as '2Q' and '; Pin 16 VCC description refers to the 2 V to 5.5 V operating range taken from the Features and Recomm"+ ],+ "pages_sent": 11,+ "cost_usd": 0.0632,+ "at": "2026-10-07T23:59:21"+ },+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/sn74lv221a.pdf",+ "pages": 31,+ "sha256": "8e179f4af7bb64d9",+ "source_tier": "mfr"+ },+ "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": "sn74lv221apwr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "sn74lv221apwr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 5,+ 1.1+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "c09b009a97d8e94ff59b88efe87ba9594c0ae24e976e7aabad6266494830e932",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}