HEF4047BT from Nexperia, in a SOP-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	CTC	passive	External timing capacitor (Ct) connection. Connects between CTC and RCTC to set the pulse width along with Rt.
2	RTC	passive	External timing resistor (Rt) connection. Connects between RTC and RCTC to set the pulse width along with Ct.
3	RCTC	passive	External capacitor/resistor common connection. Note: has special input protection and is more sensitive to static discharge than standard inputs.
4	~ASTABLE	input	Complementary astable enable input (active LOW). Allows the circuit to be used as a gate-able astable multivibrator.
5	ASTABLE	input	Astable enable input (active HIGH). A HIGH level enables astable (free-running) operation.
6	-TRIGGER	input	Negative-edge trigger input for monostable mode. A trailing-edge pulse triggers the one-shot when +TRIGGER is HIGH.
7	VSS	power_in	Ground supply voltage (0 V reference).
8	+TRIGGER	input	Positive-edge trigger input for monostable mode. A leading-edge pulse triggers the one-shot when -TRIGGER is LOW.
9	MR	input	Master reset input (active HIGH). A HIGH level ensures no output pulse during power-ON conditions and can be used to terminate an output pulse at any time.
10	O	output	True buffered output (Q). Square-wave output in astable mode; one-shot pulse output in monostable mode.
11	~O	output	Complemented buffered output (Q-bar). Inverse of the O output.
12	RETRIGGER	input	Retrigger input for monostable mode. Common pulse to RETRIGGER and +TRIGGER retriggers the multivibrator on the leading edge.
13	OSCILLATOR_OUTPUT	output	Oscillator output. In astable mode, its period is half of the O output; 50% duty factor is not guaranteed here.
14	VDD	power_in	Positive supply voltage. Operating range 3 V to 15 V (absolute max +18 V).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HEF4047BTT

CAD (KiCad official)

Symbol: HEF4047BT
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOP-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Nexperia datasheet (22 pp, sha256 abf9a47f11272215, 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