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GN1628

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by Ray

GN Semic Digital Tube Drivers, SOP-28-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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GN1628

GN Semic · Digital Tube Drivers · SOP-28-300mil

GN1628 from GN Semic, in a SOP-28-300mil. 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 NC unconnected No connection. Leave floating.
2 DIO bidirectional Serial data I/O. N-channel open-drain output with internal ~24kΩ pull-up. Carries display data written into the chip and key-scan data read out over the 3-wire serial interface.
3 CLK input Serial clock input for the 3-wire interface. Data is clocked on the CLK edges relative to STB. Max clock 1 MHz.
4 STB input Chip-select / strobe input. Falling edge starts a command frame; rising edge ends it and latches data.
5 K1 input Key-scan return input line 1 of the 10x2 key matrix. Internal ~10kΩ pull-down (RL). Sampled against KS1..KS10 during key-read frames.
6 K2 input Key-scan return input line 2 of the 10x2 key matrix. Internal ~10kΩ pull-down (RL). Sampled against KS1..KS10 during key-read frames.
7 VDD power_in Positive supply. Operating range 3.0 V to 5.5 V, typical 5 V. Tied to pin 21 (both VDD).
8 SEG1/KS1 output Muxed LED segment 1 output / key-scan drive 1. P-channel open-drain output; sources segment current when driving the display and drives the key-scan strobe otherwise.
9 SEG2/KS2 output Muxed LED segment 2 output / key-scan drive 2. P-channel open-drain.
10 SEG3/KS3 output Muxed LED segment 3 output / key-scan drive 3. P-channel open-drain.
11 SEG4/KS4 output Muxed LED segment 4 output / key-scan drive 4. P-channel open-drain.
12 SEG5/KS5 output Muxed LED segment 5 output / key-scan drive 5. P-channel open-drain.
13 SEG6/KS6 output Muxed LED segment 6 output / key-scan drive 6. P-channel open-drain.
14 SEG7/KS7 output Muxed LED segment 7 output / key-scan drive 7. P-channel open-drain.
15 SEG8/KS8 output Muxed LED segment 8 output / key-scan drive 8. P-channel open-drain.
16 SEG9/KS9 output Muxed LED segment 9 output / key-scan drive 9. P-channel open-drain.
17 SEG10/KS10 output Muxed LED segment 10 output / key-scan drive 10. P-channel open-drain.
18 SEG12/GRID7 output Muxed segment 12 / grid 7 output. P/N open-drain output; role selected by display-mode command (e.g. 4-digit x 13-seg vs 7-digit x 10-seg).
19 SEG13/GRID6 output Muxed segment 13 / grid 6 output. P/N open-drain. Role selected by display mode.
20 SEG14/GRID5 output Muxed segment 14 / grid 5 output. P/N open-drain. Role selected by display mode.
21 VDD power_in Positive supply (second VDD pin, tied internally with pin 7). 3.0-5.5 V.
22 GND power_in Ground reference (0 V). Bonded together with pins 25 and 28.
23 GRID4 output Grid (digit) drive output 4. N-channel open-drain sink used to enable one common of the LED matrix (up to +150 mA sink capability, typ IOL1 = 100 mA at VO = 0.3 V).
24 GRID3 output Grid (digit) drive output 3. N-channel open-drain sink.
25 GND power_in Ground reference (0 V). Bonded with pins 22 and 28.
26 GRID2 output Grid (digit) drive output 2. N-channel open-drain sink.
27 GRID1 output Grid (digit) drive output 1. N-channel open-drain sink.
28 GND power_in Ground reference (0 V). Bonded with pins 22 and 25.

Key specifications

Parameter Value
Manufacturer GN Semic
Package SOP-28-300mil
Category LED Drivers
Pins 28

Ordering variants

Same part, different packaging or reel option.

  • GN1628
  • GN1628T

CAD (KiCad official)

  • Symbol: GN1628
  • Footprint: Package_SO:SOP-28_8.4x18.16mm_P1.27mm
  • 3D model: SOP-28-300mil (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: GN Semic datasheet (15 pp, sha256 595f9105e69603ac, 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