component
HT1621DM
Public Unreviewedby Ray
HGSEMI LCD Drivers, SSOP-24-150mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHT1621DM
HGSEMI · LCD Drivers · SSOP-24-150mil
HT1621DM from HGSEMI, in a SSOP-24-150mil. 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 | SEG17 | output | LCD segment output 17. High-voltage segment driver tied to LCD common electrode via display glass. |
| 2 | SEG16 | output | LCD segment output 16. |
| 3 | SEG15 | output | LCD segment output 15. |
| 4 | SEG14 | output | LCD segment output 14. |
| 5 | SEG13 | output | LCD segment output 13. |
| 6 | SEG12 | output | LCD segment output 12. |
| 7 | SEG11 | output | LCD segment output 11. |
| 8 | SEG10 | output | LCD segment output 10. |
| 9 | SEG9 | output | LCD segment output 9. |
| 10 | /CS | input | Chip-select input, active low, with internal pull-up. When high, read/write is disabled and the serial interface is reset; when low, the host may transfer data and commands to HT1621. |
| 11 | /WR | input | Serial WRITE clock input, active low, with internal pull-up. Data/address/command on DATA is latched into HT1621 on the rising edge of /WR. |
| 12 | DATA | bidirectional | Serial data input/output line with internal pull-up. Carries address, command and RAM data bits for the 3-wire interface. |
| 13 | VSS | power_in | Ground reference for logic and LCD generator (0 V). |
| 14 | VLCD | power_in | LCD driver bias voltage input. Sets the LCD segment/common swing; usually tied to VDD or driven from an external voltage source to trim contrast. |
| 15 | VDD | power_in | Positive supply, 2.4 V to 5.2 V. Feeds the logic core and, when tied to VLCD, the LCD bias generator. |
| 16 | COM0 | output | LCD common (backplane) output 0. Multiplexed backplane drive; active COMs configured via BIAS&COM command (2/3/4 COMs). |
| 17 | COM1 | output | LCD common (backplane) output 1. |
| 18 | COM2 | output | LCD common (backplane) output 2. |
| 19 | COM3 | output | LCD common (backplane) output 3. |
| 20 | SEG22 | output | LCD segment output 22. |
| 21 | SEG21 | output | LCD segment output 21. |
| 22 | SEG20 | output | LCD segment output 20. |
| 23 | SEG19 | output | LCD segment output 19. |
| 24 | SEG18 | output | LCD segment output 18. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SSOP-24-150mil |
| Category | LED Drivers |
| Pins | 24 |
Ordering variants
Same part, different packaging or reel option.
HT1621DMHT1621DM/TRHT1621DMMHT1621DMM/TRHT1621DMDQHT1621DMBQ
CAD (KiCad official)
- Symbol:
HT1621DM - Footprint:
Package_SO:SSOP-24_5.3x8.2mm_P0.65mm - 3D model: SSOP-24-150mil (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (19 pp, sha256
ace3f17b9fb899e1, 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).