SN74LS14DR from Texas Instruments, in a SOIC-14. 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 Schmitt-trigger inverter input. TTL-compatible input with hysteresis; V_T+ typ 1.6 V, V_T- typ 0.8 V at V_CC = 5 V (SN74LS14).
2	1Y	output	Channel 1 inverter output. Totem-pole output; drives I_OL up to 8 mA (V_OL max 0.5 V) and I_OH up to -0.4 mA (V_OH min 2.4 V) for SN74LS14.
3	2A	input	Channel 2 Schmitt-trigger inverter input.
4	2Y	output	Channel 2 inverter output.
5	3A	input	Channel 3 Schmitt-trigger inverter input.
6	3Y	output	Channel 3 inverter output.
7	GND	power_in	Ground reference for the device (0 V).
8	4Y	output	Channel 4 inverter output.
9	4A	input	Channel 4 Schmitt-trigger inverter input.
10	5Y	output	Channel 5 inverter output.
11	5A	input	Channel 5 Schmitt-trigger inverter input.
12	6Y	output	Channel 6 inverter output.
13	6A	input	Channel 6 Schmitt-trigger inverter input.
14	VCC	power_in	Positive supply. Recommended V_CC = 4.75 V to 5.25 V (nom 5 V) for SN74LS14; absolute maximum 7 V. Decouple with a 0.1 uF ceramic cap to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

SN74LS14DRD
SN74LS14DR
SN74LS14DRDB
SN74LS14DRDBR
SN74LS14DRN
SN74LS14DRNS
SN74LS14DRNSR
SN74LS14DRJ
SN74LS14DRW
SN74LS14DRFK

CAD (KiCad official)

Symbol: SN74LS14DR
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (39 pp, sha256 5306ac92c04ef848, 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