component

HT1621

Public Made by Adom

by adom

MSKSEMI LCD Drivers, LQFP-48(7x7). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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HT1621

MSKSEMI · LCD Drivers · LQFP-48(7x7)

HT1621 from MSKSEMI, in a LQFP-48(7x7). 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 SEG7 output LCD segment 7 driver output for 32×4 LCD display matrix.
2 SEG6 output LCD segment 6 driver output for 32×4 LCD display matrix.
3 SEG5 output LCD segment 5 driver output for 32×4 LCD display matrix.
4 SEG4 output LCD segment 4 driver output for 32×4 LCD display matrix.
5 SEG3 output LCD segment 3 driver output for 32×4 LCD display matrix.
6 SEG2 output LCD segment 2 driver output for 32×4 LCD display matrix.
7 SEG1 output LCD segment 1 driver output for 32×4 LCD display matrix.
8 SEG0 output LCD segment 0 driver output for 32×4 LCD display matrix.
9 CS input Chip select input with internal pull-up; active low enables serial interface for data and command transfer, high level resets interface.
10 RD input READ clock input with internal pull-up; RAM data is output to DATA line on falling edge.
11 WR input WRITE clock input with internal pull-up; data on DATA line is latched on rising edge.
12 DATA bidirectional Serial data input/output with internal pull-up for 3-wire interface communication.
13 VSS power_in Ground reference, negative power supply connection.
14 OSCO output Oscillator output; connect to OSCI for 32.768kHz crystal operation or leave open for internal RC oscillator.
15 OSCI input Oscillator input; connect 32.768kHz crystal or 256kHz external clock, or leave open with OSCO for internal 256kHz RC oscillator.
16 VLCD input LCD voltage input for bias control.
17 VDD power_in Positive power supply input, operating range 2.4V to 5.2V.
18 IRQ tri_state Time base or WDT overflow flag output, N-channel open-drain type for interrupt signaling to host controller.
19 BZ output Buzzer output driver at 2kHz or 4kHz frequency, phase A of complementary output pair.
20 BZN output Inverted buzzer output driver, phase B complementary to BZ for driving piezoelectric buzzer.
21 COM0 output LCD common 0 output for up to 4-MUX LCD display drive.
22 COM1 output LCD common 1 output for up to 4-MUX LCD display drive.
23 COM2 output LCD common 2 output for up to 4-MUX LCD display drive.
24 COM3 output LCD common 3 output for up to 4-MUX LCD display drive.
25 SEG31 output LCD segment 31 driver output for 32×4 LCD display matrix.
26 SEG30 output LCD segment 30 driver output for 32×4 LCD display matrix.
27 SEG29 output LCD segment 29 driver output for 32×4 LCD display matrix.
28 SEG28 output LCD segment 28 driver output for 32×4 LCD display matrix.
29 SEG27 output LCD segment 27 driver output for 32×4 LCD display matrix.
30 SEG26 output LCD segment 26 driver output for 32×4 LCD display matrix.
31 SEG25 output LCD segment 25 driver output for 32×4 LCD display matrix.
32 SEG24 output LCD segment 24 driver output for 32×4 LCD display matrix.
33 SEG23 output LCD segment 23 driver output for 32×4 LCD display matrix.
34 SEG22 output LCD segment 22 driver output for 32×4 LCD display matrix.
35 SEG21 output LCD segment 21 driver output for 32×4 LCD display matrix.
36 SEG20 output LCD segment 20 driver output for 32×4 LCD display matrix.
37 SEG19 output LCD segment 19 driver output for 32×4 LCD display matrix.
38 SEG18 output LCD segment 18 driver output for 32×4 LCD display matrix.
39 SEG17 output LCD segment 17 driver output for 32×4 LCD display matrix.
40 SEG16 output LCD segment 16 driver output for 32×4 LCD display matrix.
41 SEG15 output LCD segment 15 driver output for 32×4 LCD display matrix.
42 SEG14 output LCD segment 14 driver output for 32×4 LCD display matrix.
43 SEG13 output LCD segment 13 driver output for 32×4 LCD display matrix.
44 SEG12 output LCD segment 12 driver output for 32×4 LCD display matrix.
45 SEG11 output LCD segment 11 driver output for 32×4 LCD display matrix.
46 SEG10 output LCD segment 10 driver output for 32×4 LCD display matrix.
47 SEG9 output LCD segment 9 driver output for 32×4 LCD display matrix.
48 SEG8 output LCD segment 8 driver output for 32×4 LCD display matrix.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package LQFP-48(7x7)
Category LED Drivers
Pins 48

CAD (KiCad official)

  • Symbol: HT1621
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: ht1621-etched.step / ht1621-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht1621.step / ht1621.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (18 pp, sha256 d01782c3b9399775, retrieved 2026-09-22, 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: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF