SN74LS122N

Texas Instruments · Monostable Multivibrators · PDIP-14

SN74LS122N from Texas Instruments, in a PDIP-14. 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	A1	input	Active-low gated trigger input A1; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states.
2	A2	input	Active-low gated trigger input A2; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states.
3	B1	input	Active-high gated trigger input B1 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns.
4	B2	input	Active-high gated trigger input B2 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns.
5	CLR	input	Active-low overriding clear input that terminates the output pulse.
6	Q̅	output	Complementary (active-low) output of the monostable multivibrator.
7	GND	power_in	Ground.
8	Q	output	True (active-high) pulse output of the monostable multivibrator.
9	Rint	passive	Internal timing resistor (nominally 10 kΩ); connect to VCC to use it.
10	NC	unconnected	No internal connection.
11	Cext	passive	External timing capacitor connection; the capacitor goes between Cext and Rext/Cext (positive).
12	NC	unconnected	No internal connection.
13	Rext/Cext	passive	External timing resistor and capacitor connection (capacitor positive side); an external resistor goes to VCC with Rint open-circuited.
14	VCC	power_in	Positive supply voltage.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	PDIP-14
Category	Logic ICs
Pins	14

CAD (KiCad official)

Symbol: SN74LS122N
Footprint: Package_DIP:DIP-14_W7.62mm
3D model: PDIP-14 (KiCad packages3D, STEP)
3D model files: sn74ls122n-etched.step / sn74ls122n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls122n.step / sn74ls122n.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (31 pp, sha256 3b63fa652f19f07e, retrieved 2026-10-23, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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

# SN74LS122N

**Texas Instruments** · Monostable Multivibrators · PDIP-14

SN74LS122N from Texas Instruments, in a PDIP-14. 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 | A1 | input | Active-low gated trigger input A1; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states. |
| 2 | A2 | input | Active-low gated trigger input A2; a falling edge triggers the pulse when CLR is high and the other inputs are in their enabling states. |
| 3 | B1 | input | Active-high gated trigger input B1 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns. |
| 4 | B2 | input | Active-high gated trigger input B2 with Schmitt hysteresis for jitter-free triggering at transition rates as slow as 0.1 mV per ns. |
| 5 | CLR | input | Active-low overriding clear input that terminates the output pulse. |
| 6 | Q̅ | output | Complementary (active-low) output of the monostable multivibrator. |
| 7 | GND | power_in | Ground. |
| 8 | Q | output | True (active-high) pulse output of the monostable multivibrator. |
| 9 | Rint | passive | Internal timing resistor (nominally 10 kΩ); connect to VCC to use it. |
| 10 | NC | unconnected | No internal connection. |
| 11 | Cext | passive | External timing capacitor connection; the capacitor goes between Cext and Rext/Cext (positive). |
| 12 | NC | unconnected | No internal connection. |
| 13 | Rext/Cext | passive | External timing resistor and capacitor connection (capacitor positive side); an external resistor goes to VCC with Rint open-circuited. |
| 14 | VCC | power_in | Positive supply voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-14 |
| Category | Logic ICs |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `SN74LS122N`
- Footprint: `Package_DIP:DIP-14_W7.62mm`
- 3D model: PDIP-14 (KiCad packages3D, STEP)
- 3D model files: `sn74ls122n-etched.step` / `sn74ls122n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls122n.step` / `sn74ls122n.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/sn74ls122n.pdf) (31 pp, sha256 `3b63fa652f19f07e`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sn74ls122n-datasheet.pdf)