SN74AHCT125DR 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	1OE	input	Active-low output enable for gate 1. When low, 1Y follows 1A; when high, 1Y is in high-impedance state. TTL-compatible input, VIH >= 2 V, VIL <= 0.8 V.
2	1A	input	Gate 1 data input. TTL-compatible logic input to buffer 1.
3	1Y	tri_state	Gate 1 3-state output. Drives the buffered value of 1A when 1OE is low; high-Z when 1OE is high. IOH/IOL = +/-8 mA at VCC = 4.5-5.5 V.
4	2OE	input	Active-low output enable for gate 2. When low, 2Y follows 2A; when high, 2Y is in high-impedance state.
5	2A	input	Gate 2 data input. TTL-compatible logic input to buffer 2.
6	2Y	tri_state	Gate 2 3-state output. Drives the buffered value of 2A when 2OE is low; high-Z when 2OE is high.
7	GND	power_in	Ground reference (0 V). Ties to system ground.
8	3Y	tri_state	Gate 3 3-state output. Drives the buffered value of 3A when 3OE is low; high-Z when 3OE is high.
9	3A	input	Gate 3 data input. TTL-compatible logic input to buffer 3.
10	3OE	input	Active-low output enable for gate 3. When low, 3Y follows 3A; when high, 3Y is in high-impedance state.
11	4Y	tri_state	Gate 4 3-state output. Drives the buffered value of 4A when 4OE is low; high-Z when 4OE is high.
12	4A	input	Gate 4 data input. TTL-compatible logic input to buffer 4.
13	4OE	input	Active-low output enable for gate 4. When low, 4Y follows 4A; when high, 4Y is in high-impedance state.
14	VCC	power_in	Positive supply voltage. Recommended operating range 4.5 V to 5.5 V (absolute max 7 V). Bypass with a 0.1 uF ceramic capacitor 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.

SN74AHCT125DRD
SN74AHCT125DR
SN74AHCT125DRDB
SN74AHCT125DRDBR
SN74AHCT125DRDGV
SN74AHCT125DRDGVR
SN74AHCT125DRN
SN74AHCT125DRNS
SN74AHCT125DRNSR
SN74AHCT125DRPW
SN74AHCT125DRPWR
SN74AHCT125DRRGY
SN74AHCT125DRRGYR
SN74AHCT125DRBQA
SN74AHCT125DRBQAR
SN74AHCT125DRJ
SN74AHCT125DRW
SN74AHCT125DRFK

CAD (KiCad official)

Symbol: SN74AHCT125DR
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 (44 pp, sha256 0f6a373471f0b946, 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