PCF8563M from HGSEMI, in a SOP-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	OSCI	input	Oscillator input. Connect one terminal of the 32.768 kHz crystal here; a trim capacitor of 5-25 pF is applied externally to OSCI.
2	OSCO	output	Oscillator output. Connects to the other terminal of the 32.768 kHz crystal. Internal load capacitance is typically 25 pF (15-35 pF).
3	INT	output	Interrupt output, open-drain (active low). Low-level output current typ. -1 mA at VOL=0.4 V, VDD=5.0 V. Requires an external pull-up resistor.
4	VSS	power_in	Ground reference (0 V) for the device.
5	SDA	bidirectional	I2C serial data I/O, open-drain. Requires external pull-up resistor. IOLS min -3 mA at VOL=0.4 V, VDD=5.0 V. I2C slave address: read 0xA3, write 0xA2. Max bus speed 400 kbit/s.
6	SCL	input	I2C serial clock input. Max 400 kHz. VIH >= 0.7VDD, VIL <= 0.3VDD.
7	CLKOUT	output	Programmable clock output, open-drain. Selectable output frequencies of 32.768 kHz, 1024 Hz, 32 Hz, or 1 Hz. IOLC min -1 mA at VOL=0.4 V; IOHC min 1 mA at VOL=4.6 V (VDD=5.0 V).
8	VDD	power_in	Positive supply voltage. Operating range 1.2-5.5 V (I2C inactive) or 1.8-5.5 V at f=400 kHz. Absolute max +6.5 V. Typical IDD 0.25 μA at VDD=3.0 V with CLKOUT disabled.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-8
Category	RTC
Pins	8

Ordering variants

Same part, different packaging or reel option.

PCF8563MM/TR
PCF8563MMM/TR
PCF8563MN
PCF8563MDQ3/TR

CAD (KiCad official)

Symbol: PCF8563M
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pcf8563m.step`	122 KB	You want the bare part, or you mark your own boards.
`pcf8563m-etched.step`	2.0 MB	You want the part with `PCF8563M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 489 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 (21 pp, sha256 52838857838b981c, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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