LM567M from HGSEMI, in a SOIC-8. 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	OUTPUT_FILTER	passive	Output filter capacitor connection (C2). Sets the low-pass filter time constant that removes carrier feedthrough from the I-detector output; larger C2 narrows the detection bandwidth.
2	LOOP_FILTER	passive	Loop filter capacitor connection (C3). Sets the PLL loop bandwidth and hence the detection bandwidth of the tone decoder.
3	INPUT	input	Signal input to the phase detector. Input impedance ~20 kΩ; smallest detectable input voltage typically 20 mVrms (IL = 100 mA). AC-couple the incoming tone signal here.
4	V+	power_in	Positive supply voltage. Operating range 4.75 V to 9.0 V (absolute max 9 V). Typical quiescent current 6 mA; activated current ~11 mA with RL = 20 kΩ.
5	TIMING_RESISTOR	passive	External VCO timing resistor (R1) connection. Together with C1 on pin 6 sets the free-running center frequency f0 ≈ 1/(1.1·R1·C1). Range supports f0 from 0.01 Hz to 500 kHz.
6	TIMING_CAPACITOR	passive	External VCO timing capacitor (C1) connection. With R1 on pin 5 sets the VCO free-running center frequency.
7	GND	power_in	Device ground reference. All external timing/filter components and the output load return to this pin.
8	OUTPUT	output	Open-collector logic-compatible output. Pulls to ground (saturated NPN, VOL ~0.2 V at 30 mA, 0.6 V at 100 mA) when an in-band tone is detected; requires an external pull-up (RL, e.g. 20 kΩ). Absolute max V8 = 15 V, 100 mA sink capability.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOIC-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM567MM/TR
LM567MCM/TR
LM567MN
LM567MCN

CAD (KiCad official)

Symbol: LM567M
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm567m.step`	122 KB	You want the bare part, or you mark your own boards.
`lm567m-etched.step`	1.2 MB	You want the part with `LM567M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 322 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: HGSEMI datasheet (12 pp, sha256 47a007a297187f96, retrieved 2026-08-17, tier: lcsc)
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