GN1650 from GN Semic, in a SOP-16. 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	DIG1	output	Digit/key-scan output 1. LED digit (common) drive output - active low for LED drive, active high when used as a keypad scan output. Sinks up to ~150 mA per digit line.
2	CLK	input	Serial clock input for the 2-wire (I2C-like) interface. Internal pull-up (typ. 200 uA). VIL max 0.8 V, VIH min 2.0 V. Data is latched on the rising edge; max ~4 Mbps.
3	DIO	bidirectional	Serial data input/output for the 2-wire interface. Open-drain with internal pull-up (typ. 300 uA). Carries commands and read-back key-scan data; changes only while CLK is low.
4	GND	power_in	Ground reference (0 V) for supply, logic, and drive currents.
5	DIG2	output	Digit/key-scan output 2. LED digit (common) drive output - active low for LED drive, active high when used as a keypad scan output.
6	DIG3	output	Digit/key-scan output 3. LED digit (common) drive output - active low for LED drive, active high when used as a keypad scan output.
7	DIG4	output	Digit/key-scan output 4. LED digit (common) drive output - active low for LED drive, active high when used as a keypad scan output.
8	A/KI1	bidirectional	LED segment A drive output (active high, up to ~25 mA) / keypad column input KI1 (active high, internal pull-down ~50 uA typ.).
9	B/KI2	bidirectional	LED segment B drive output (active high) / keypad column input KI2 (active high, internal pull-down).
10	VDD	power_in	Supply voltage input, 3.0 V to 5.5 V (typ. 5 V). Datasheet recommends a 104 (100 nF) decoupling capacitor placed within 2 cm of the VDD pin; typical operating current 80 mA, max 230 mA.
11	C/KI3	bidirectional	LED segment C drive output (active high) / keypad column input KI3 (active high, internal pull-down).
12	D/KI4	bidirectional	LED segment D drive output (active high) / keypad column input KI4 (active high, internal pull-down).
13	E/KI5	bidirectional	LED segment E drive output (active high) / keypad column input KI5 (active high, internal pull-down).
14	F/KI6	bidirectional	LED segment F drive output (active high) / keypad column input KI6 (active high, internal pull-down).
15	G/KI7	bidirectional	LED segment G drive output (active high) / keypad column input KI7 (active high, internal pull-down).
16	DP/KP	output	LED decimal-point segment output; also outputs a keypad flag/marker signal. Internal strong pull-up (IUP3 typ. 2 mA).

Key specifications

Parameter	Value
Manufacturer	GN Semic
Package	SOP-16
Category	LED-drv
Pins	16

Ordering variants

Same part, different packaging or reel option.

GN1650
GN1650D

CAD (KiCad official)

Symbol: GN1650
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`gn1650.step`	217 KB	You want the bare part, or you mark your own boards.
`gn1650-etched.step`	1.9 MB	You want the part with `GN1650` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 486 faces against 267 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: GN Semic datasheet (11 pp, sha256 99e92c85db4cfe63, 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