HEF40106BT from Nexperia, 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	Schmitt-trigger input of inverter 1. Includes input clamp diodes to VDD and VSS; VI range 0 V to VDD; typical positive-going threshold VT+ = 3.0 V at VDD = 5 V, negative-going threshold VT- = 2.2 V.
2	1Y	output	Inverted output of inverter 1. CMOS push-pull output; IOH ~ -1.4 mA at VO = 2.5 V, VDD = 5 V; IOL ~ 0.5 mA at VO = 0.4 V, VDD = 5 V.
3	2A	input	Schmitt-trigger input of inverter 2. Includes input clamp diodes to VDD and VSS.
4	2Y	output	Inverted output of inverter 2. CMOS push-pull output.
5	3A	input	Schmitt-trigger input of inverter 3. Includes input clamp diodes to VDD and VSS.
6	3Y	output	Inverted output of inverter 3. CMOS push-pull output.
7	VSS	power_in	Ground (0 V) reference. Negative supply rail; all voltages referenced to VSS.
8	4Y	output	Inverted output of inverter 4. CMOS push-pull output.
9	4A	input	Schmitt-trigger input of inverter 4. Includes input clamp diodes to VDD and VSS.
10	5Y	output	Inverted output of inverter 5. CMOS push-pull output.
11	5A	input	Schmitt-trigger input of inverter 5. Includes input clamp diodes to VDD and VSS.
12	6Y	output	Inverted output of inverter 6. CMOS push-pull output.
13	6A	input	Schmitt-trigger input of inverter 6. Includes input clamp diodes to VDD and VSS.
14	VDD	power_in	Positive supply voltage. Operating range 3.0 V to 15.0 V; absolute maximum 18 V. Supply current IDD typ 0.25 uA at VDD = 5 V (static).

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	SOIC-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

HEF40106BT
HEF40106BTT

CAD (KiCad official)

Symbol: HEF40106BT
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: Nexperia datasheet (14 pp, sha256 385d3a3085506d62, 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