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HTM1640

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by Ray

TDSEMIC LED Drivers, SSOP-28. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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HTM1640

TDSEMIC · LED Drivers · SSOP-28

HTM1640 from TDSEMIC, in a SSOP-28. 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 GRID12 output Digit (grid) output 12. N-channel open-drain output driving a common-cathode digit line; up to 200 mA sink current.
2 GRID13 output Digit (grid) output 13. N-channel open-drain output driving a common-cathode digit line.
3 GRID14 output Digit (grid) output 14. N-channel open-drain output driving a common-cathode digit line.
4 GRID15 output Digit (grid) output 15. N-channel open-drain output driving a common-cathode digit line.
5 GRID16 output Digit (grid) output 16. N-channel open-drain output driving a common-cathode digit line.
6 VSS power_in Logic ground. Connect to system ground (0 V). Also labeled GND on the pinout diagram.
7 DIN input Serial data input. Data is changed while SCLK is low and latched when SCLK is high; transmitted LSB first. Also labeled DATA on the pinout diagram.
8 SCLK input Serial clock input. Data on DIN is sampled on the rising edge. VIH = 0.7VDD, VIL = 0.3VDD, 0.35 V hysteresis. Also labeled CLK on the pinout diagram.
9 SEG1 output Segment output 1. P-channel open-drain (source) output driving an LED anode line; up to 50 mA source current.
10 SEG2 output Segment output 2. P-channel open-drain (source) output driving an LED anode line.
11 SEG3 output Segment output 3. P-channel open-drain (source) output driving an LED anode line.
12 SEG4 output Segment output 4. P-channel open-drain (source) output driving an LED anode line.
13 SEG5 output Segment output 5. P-channel open-drain (source) output driving an LED anode line.
14 SEG6 output Segment output 6. P-channel open-drain (source) output driving an LED anode line.
15 SEG7 output Segment output 7. P-channel open-drain (source) output driving an LED anode line.
16 SEG8 output Segment output 8. P-channel open-drain (source) output driving an LED anode line.
17 VDD power_in Logic power supply. Recommended 5 V ±10% (3.0 V to 5.5 V operating range). Absolute maximum -0.5 V to +7.0 V.
18 GRID1 output Digit (grid) output 1. N-channel open-drain output driving a common-cathode digit line; up to 200 mA sink current.
19 GRID2 output Digit (grid) output 2. N-channel open-drain output driving a common-cathode digit line.
20 GRID3 output Digit (grid) output 3. N-channel open-drain output driving a common-cathode digit line.
21 GRID4 output Digit (grid) output 4. N-channel open-drain output driving a common-cathode digit line.
22 GRID5 output Digit (grid) output 5. N-channel open-drain output driving a common-cathode digit line.
23 GRID6 output Digit (grid) output 6. N-channel open-drain output driving a common-cathode digit line.
24 GRID7 output Digit (grid) output 7. N-channel open-drain output driving a common-cathode digit line.
25 GRID8 output Digit (grid) output 8. N-channel open-drain output driving a common-cathode digit line.
26 GRID9 output Digit (grid) output 9. N-channel open-drain output driving a common-cathode digit line.
27 GRID10 output Digit (grid) output 10. N-channel open-drain output driving a common-cathode digit line.
28 GRID11 output Digit (grid) output 11. N-channel open-drain output driving a common-cathode digit line.

Key specifications

Parameter Value
Manufacturer TDSEMIC
Package SSOP-28
Category LED Drivers
Pins 28

Ordering variants

Same part, different packaging or reel option.

  • HTM1640SSOP28
  • HTM1640SOP28

CAD (KiCad official)

  • Symbol: HTM1640
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: TDSEMIC datasheet (14 pp, sha256 da626725a5629030, 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