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.
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
markdownSN74LV221APWR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74lv221apwr.step/sn74lv221apwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
8e179f4af7bb64d9, retrieved 2026-10-07, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).