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HTM1650-TD

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by Ray

TDSEMIC LED Drivers, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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HTM1650-TD

TDSEMIC · LED Drivers · SOP-16

HTM1650-TD from TDSEMIC, 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 LED digit 1 drive output, active-low; also used as key-scan output, active-high. Digit drive sink capability greater than 150 mA.
2 CLK input Serial clock input for the 2-wire (I2C-like) interface. Data is latched on the rising edge of CLK. Internal pull-up (~350 uA typical pull-up current).
3 DIO bidirectional Serial data input/output for the 2-wire interface. Open-drain with internal pull-up (~350 uA). Data changes only when CLK is low; ACK asserted by the chip on the 9th clock.
4 GND power_in Ground reference (0 V) for logic and drivers.
5 DIG2 output LED digit 2 drive output, active-low; also used as key-scan output, active-high.
6 DIG3 output LED digit 3 drive output, active-low; also used as key-scan output, active-high.
7 DIG4 output LED digit 4 drive output, active-low; also used as key-scan output, active-high.
8 A/KI1 bidirectional LED segment A drive output (active-high, >25 mA) shared with key-scan input KI1 (active-high, internal pull-down ~50 uA).
9 B/KI2 bidirectional LED segment B drive output (active-high) shared with key-scan input KI2 (active-high, internal pull-down).
10 VCC power_in Positive supply, 3.0-5.5 V (typ. 5 V). Add a 104 (100 nF) decoupling capacitor to GND close to the pin (<2 cm recommended). Labeled VDD in the pin description table but marked VCC on the pinout diagram.
11 C/KI3 bidirectional LED segment C drive output (active-high) shared with key-scan input KI3 (active-high, internal pull-down).
12 D/KI4 bidirectional LED segment D drive output (active-high) shared with key-scan input KI4 (active-high, internal pull-down).
13 E/KI5 bidirectional LED segment E drive output (active-high) shared with key-scan input KI5 (active-high, internal pull-down).
14 F/KI6 bidirectional LED segment F drive output (active-high) shared with key-scan input KI6 (active-high, internal pull-down).
15 G/KI7 bidirectional LED segment G drive output (active-high) shared with key-scan input KI7 (active-high, internal pull-down).
16 DP/KP bidirectional LED decimal-point segment output; also used as keyboard-press flag output (KP has internal pull-up ~2 mA typ).

Key specifications

Parameter Value
Manufacturer TDSEMIC
Package SOP-16
Category LED Drivers
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • HTM1650-TD

CAD (KiCad official)

  • Symbol: HTM1650-TD
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: TDSEMIC datasheet (10 pp, sha256 2bc5c6d416f24d44, 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