GM1302 from GATEMODE, 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	Vcc2	power_in	Primary supply pin in a dual-supply system. GM1302 is powered by whichever of Vcc1/Vcc2 is higher: when Vcc2 > Vcc1 + 0.2V, GM1302 draws from Vcc2; when Vcc2 + 0.2V < Vcc1, it draws from Vcc1. Recommended operating range 2.0-5.5V.
2	X1	input	Oscillator input; connect an external 32.768 kHz crystal between X1 and X2 (specified crystal load capacitance CL = 6pF). Internal oscillator capacitance is integrated.
3	X2	output	Oscillator output; connect to the external 32.768 kHz crystal along with X1.
4	GND	power_in	Ground reference for the device. All voltages are referenced to GND.
5	RST	input	Reset / chip-enable input. Must be driven HIGH during any read/write to initiate a data transfer; driving it low terminates a transfer and places I/O in high-impedance. Contains an internal 40kΩ (typ) pull-down to ground. On power-up RST must be held logic 0 until Vcc ≥ 2.5V.
6	I/O	bidirectional	Bidirectional serial data pin for the 3-wire interface (command/address in, data in/out). Contains an internal 40kΩ (typ) pull-down to ground. Goes high-impedance when RST is low or between output bits per SCLK rising edge. I/O capacitance C_I/O typ. 15 pF.
7	SCLK	input	Serial clock input for the 3-wire interface; synchronizes data transfers on the I/O pin. Data in is latched on the rising edge, data out is driven on the falling edge. Contains an internal 40kΩ (typ) pull-down. Max SCLK frequency 2 MHz at Vcc = 5V (0.5 MHz at Vcc = 2V).
8	Vcc1	power_in	Backup supply pin. In a single-supply-with-battery system Vcc1 provides low-power operation and low-power battery backup; it can source the device (and be trickle-charged from Vcc2 through the programmable trickle-charge network) when the main Vcc2 supply is absent.

Key specifications

Parameter	Value
Manufacturer	GATEMODE
Package	SOIC-8
Category	RTC
Pins	8

CAD (KiCad official)

Symbol: GM1302
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
`gm1302.step`	122 KB	You want the bare part, or you mark your own boards.
`gm1302-etched.step`	1.6 MB	You want the part with `GM1302` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 393 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: GATEMODE datasheet (11 pp, sha256 3214ee6475dc55db, 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