SN74AHC123APWR

@@ -0,0 +1,63 @@+# SN74AHC123APWR++**Texas Instruments** · Monostable Multivibrators · TSSOP-16++SN74AHC123APWR from Texas Instruments, in a TSSOP-16. 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 | 1A | input | Channel 1 falling-edge trigger input (active-low, denoted 1A-bar). Triggers a one-shot pulse when 1B = H. Hold low for other input methods. Schmitt-trigger input. |+| 2 | 1B | input | Channel 1 rising-edge trigger input. Triggers a one-shot pulse when 1A-bar = L. Hold high for other input methods. Schmitt-trigger input. |+| 3 | 1CLR | input | Channel 1 active-low clear/rising-edge trigger input (1CLR-bar). Triggers rising-edge when 1A-bar = L and 1B = H. Driving low terminates the output pulse. Hold high for other input methods. Schmitt-trigger input. |+| 4 | 1Q | output | Channel 1 inverted output (1Q-bar). Complementary to 1Q. |+| 5 | 2Q | output | Channel 2 non-inverted output. Delivers the timed one-shot pulse for channel 2. |+| 6 | 2Cext | passive | Channel 2 external timing capacitor negative connection. Connect the external Cext capacitor between this pin and pin 7 (2Rext/Cext). |+| 7 | 2Rext/Cext | passive | Channel 2 external capacitor and timing resistor junction. Rext connects between this pin and VCC (Rext >= 5 kΩ at VCC=2 V, >= 1 kΩ at VCC>3 V); Cext connects between this pin and 2Cext. |+| 8 | GND | power_in | Ground reference (0 V). Return for VCC and all logic signals. |+| 9 | 2A | input | Channel 2 falling-edge trigger input (active-low, 2A-bar). Triggers a one-shot pulse when 2B = H. Hold low for other input methods. Schmitt-trigger input. |+| 10 | 2B | input | Channel 2 rising-edge trigger input. Triggers a one-shot pulse when 2A-bar = L. Hold high for other input methods. Schmitt-trigger input. |+| 11 | 2CLR | input | Channel 2 active-low clear/rising-edge trigger input (2CLR-bar). Triggers rising-edge when 2A-bar = L and 2B = H. Driving low terminates the output pulse. Hold high for other input methods. Schmitt-trigger input. |+| 12 | 2Q | output | Channel 2 inverted output (2Q-bar). Complementary to 2Q. |+| 13 | 1Q | output | Channel 1 non-inverted output. Delivers the timed one-shot pulse for channel 1. |+| 14 | 1Cext | passive | Channel 1 external timing capacitor negative connection. Connect the external Cext capacitor between this pin and pin 15 (1Rext/Cext). |+| 15 | 1Rext/Cext | passive | Channel 1 external capacitor and timing resistor junction. Rext connects between this pin and VCC (>= 5 kΩ at VCC=2 V, >= 1 kΩ at VCC>3 V); Cext connects between this pin and 1Cext. |+| 16 | VCC | power_in | Positive supply voltage. Operating range 2 V to 5.5 V. Bypass to GND with a local decoupling capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++- `SN74AHC123APWRPW`+- `SN74AHC123APWRPWR`+- `SN74AHC123APWRD`+- `SN74AHC123APWRDB`+- `SN74AHC123APWRDGV`+- `SN74AHC123APWRN`+- `SN74AHC123APWRFK`+- `SN74AHC123APWRJ`+- `SN74AHC123APWRW`++## CAD (KiCad official)++- Symbol: `SN74AHC123APWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74ahc123a.pdf) (36 pp, sha256 `1a0b625278e7d4c2`, retrieved 2026-08-17, tier: manufacturer)+- **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/sn74ahc123apwr-datasheet.pdf)

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