SN74HC151DR from Texas Instruments, in a SOIC-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	D3	input	Data input channel 3. Selected and routed to Y (and inverted to W) when select inputs C,B,A = 011 and strobe G is low.
2	D2	input	Data input channel 2. Selected and routed to Y (and inverted to W) when select inputs C,B,A = 010 and strobe G is low.
3	D1	input	Data input channel 1. Selected and routed to Y (and inverted to W) when select inputs C,B,A = 001 and strobe G is low.
4	D0	input	Data input channel 0. Selected and routed to Y (and inverted to W) when select inputs C,B,A = 000 and strobe G is low.
5	Y	output	True (non-inverted) data output. Reflects the selected D input while strobe G is low; forced low when G is high. Drives up to 10 LSTTL loads (±6 mA at 5 V).
6	W	output	Complementary (inverted) data output. Reflects the inverse of the selected D input while strobe G is low; forced high when G is high. Drives up to 10 LSTTL loads (±6 mA at 5 V).
7	G	input	Active-low strobe (enable) input. Must be low to enable the multiplexer; a high level forces Y low and W high regardless of the D inputs and select code.
8	GND	power_in	Ground reference (0 V) for the device.
9	C	input	Binary select input C (MSB of the 3-bit channel select). Together with B and A selects one of D0-D7 to route to Y/W.
10	B	input	Binary select input B (middle bit of the 3-bit channel select).
11	A	input	Binary select input A (LSB of the 3-bit channel select).
12	D7	input	Data input channel 7. Selected when C,B,A = 111 and strobe G is low.
13	D6	input	Data input channel 6. Selected when C,B,A = 110 and strobe G is low.
14	D5	input	Data input channel 5. Selected when C,B,A = 101 and strobe G is low.
15	D4	input	Data input channel 4. Selected when C,B,A = 100 and strobe G is low.
16	VCC	power_in	Positive supply voltage. Recommended operating range 2 V to 6 V (5 V nominal); absolute maximum 7 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

SN74HC151DRD
SN74HC151DR
SN74HC151DRN
SN74HC151DRNS
SN74HC151DRPW
SN74HC151DRJ
SN74HC151DRFK

CAD (KiCad official)

Symbol: SN74HC151DR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (28 pp, sha256 52a419ef9dca8855, 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