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HT1622B-LQ64

Public Made by Adom

by adom

HGSEMI LCD Drivers, LQFP-64(7x7). Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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HT1622B-LQ64

HGSEMI · LCD Drivers · LQFP-64(7x7)

HT1622B-LQ64 from HGSEMI, in a LQFP-64(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CS input Active-low chip select input with pull-up; high resets the serial interface and blocks data/command transfer, low enables transfers.
2 NC unconnected No connect.
3 RD input READ clock input with pull-up; RAM data is output on DATA at the falling edge and can be latched by the host on the next rising edge.
4 WR input WRITE clock input with pull-up; data on DATA is latched into the HT1622B on the rising edge.
5 DATA bidirectional Serial data input/output with pull-up.
6 VSS power_in Ground.
7 OSCI input External system clock input; may be left floating when using the on-chip RC oscillator.
8 VDD power_in Power supply, 2.7V to 5.2V operating.
9 VLCD input LCD voltage input; must be less than or equal to VDD.
10 IRQ output Time base or WDT overflow flag output, N-channel open-drain.
11 BZ output Buzzer drive output at 2kHz or 4kHz, complementary to BZ-bar.
12 NC unconnected No connect.
13 BZ_N output Inverted buzzer drive output at 2kHz or 4kHz.
14 T1 unconnected Test pin, left floating.
15 T2 unconnected Test pin, left floating.
16 T3 unconnected Test pin, left floating.
17 COM0 output LCD common output.
18 COM1 output LCD common output.
19 NC unconnected No connect.
20 COM2 output LCD common output.
21 COM3 output LCD common output.
22 COM4 output LCD common output.
23 COM5 output LCD common output.
24 COM6 output LCD common output.
25 COM7 output LCD common output.
26 SEG0 output LCD segment output.
27 SEG1 output LCD segment output.
28 SEG2 output LCD segment output.
29 SEG3 output LCD segment output.
30 SEG4 output LCD segment output.
31 SEG5 output LCD segment output.
32 SEG6 output LCD segment output.
33 NC unconnected No connect.
34 NC unconnected No connect.
35 NC unconnected No connect.
36 SEG7 output LCD segment output.
37 SEG8 output LCD segment output.
38 SEG9 output LCD segment output.
39 SEG10 output LCD segment output.
40 SEG11 output LCD segment output.
41 SEG12 output LCD segment output.
42 SEG13 output LCD segment output.
43 SEG14 output LCD segment output.
44 SEG15 output LCD segment output.
45 SEG16 output LCD segment output.
46 SEG17 output LCD segment output.
47 SEG18 output LCD segment output.
48 SEG19 output LCD segment output.
49 NC unconnected No connect.
50 NC unconnected No connect.
51 NC unconnected No connect.
52 NC unconnected No connect.
53 SEG20 output LCD segment output.
54 SEG21 output LCD segment output.
55 SEG22 output LCD segment output.
56 SEG23 output LCD segment output.
57 SEG24 output LCD segment output.
58 SEG25 output LCD segment output.
59 SEG26 output LCD segment output.
60 SEG27 output LCD segment output.
61 SEG28 output LCD segment output.
62 SEG29 output LCD segment output.
63 SEG30 output LCD segment output.
64 SEG31 output LCD segment output.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package LQFP-64(7x7)
Category LED Drivers
Pins 64

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (absolute maximum) VDD -0.3 5.5 V 10
Storage temperature TSTG -50 125 ℃ 10
Operating temperature TOTG -25 75 ℃ 10
Pin soldering temperature TLEAD 260 ℃ soldering, 10 s 10
Operating voltage VDD 2.7 5.2 V 10
Operating current (LCD on, internal RC oscillator) IDD1 80 210 µA VDD=3V; no load, LCD on, internal RC oscillator 10
Operating current (LCD on, internal RC oscillator) IDD1 135 415 µA VDD=5V; no load, LCD on, internal RC oscillator 10
Operating current (LCD off, internal RC oscillator) IDD2 8 30 µA VDD=3V; no load, LCD off, internal RC oscillator 10
Operating current (LCD off, internal RC oscillator) IDD2 20 55 µA VDD=5V; no load, LCD off, internal RC oscillator 10
Standby current (power-down mode) ISTB 1 8 µA VDD=3V; no load, power-down mode 10
Standby current (power-down mode) ISTB 2 16 µA VDD=5V; no load, power-down mode 10
Input low voltage VIL 0 0.6 V VDD=3V; DATA, WR, CS, RD 10
Input low voltage VIL 0 1 V VDD=5V; DATA, WR, CS, RD 10
Input high voltage VIH 2.4 3 V VDD=3V; DATA, WR, CS, RD 10
Input high voltage VIH 4 5 V VDD=5V; DATA, WR, CS, RD 10
Low-level sink current (BZ, BZ-bar, IRQ) IOL1 0.9 1.8 mA VDD=3V; VOL=0.3V 10
Low-level sink current (BZ, BZ-bar, IRQ) IOL1 1.7 3 mA VDD=5V; VOL=0.5V 10
High-level source current (BZ, BZ-bar) IOH1 -0.9 -1.8 mA VDD=3V; VOH=2.7V 10
High-level source current (BZ, BZ-bar) IOH1 -1.7 -3 mA VDD=5V; VOH=4.5V 10
Low-level sink current (DATA) IOL1 200 450 µA VDD=3V; VOL=0.3V 10
Low-level sink current (DATA) IOL1 250 500 µA VDD=5V; VOL=0.5V 10
High-level source current (DATA) IOH1 -200 -450 µA VDD=3V; VOH=2.7V 10
High-level source current (DATA) IOH1 -250 -500 µA VDD=5V; VOH=4.5V 10
LCD COM sink current IOL2 15 40 µA VDD=3V; VOL=0.3V 10
LCD COM sink current IOL2 100 200 µA VDD=5V; VOL=0.5V 10
LCD COM source current IOH2 -15 -30 µA VDD=3V; VOH=2.7V 10
LCD COM source current IOH2 -45 -90 µA VDD=5V; VOH=4.5V 10
LCD SEG sink current IOL3 15 30 µA VDD=3V; VOL=0.3V 10
LCD SEG sink current IOL3 70 150 µA VDD=5V; VOL=0.5V 10
LCD SEG source current IOH3 -6 -13 µA VDD=3V; VOH=2.7V 10
LCD SEG source current IOH3 -20 -40 µA VDD=5V; VOH=4.5V 10
Pull-up resistance RPH 100 200 300 KΩ VDD=3V; DATA, WR, CS, RD 10
Pull-up resistance RPH 50 100 150 KΩ VDD=5V; DATA, WR, CS, RD 10
System clock (on-chip RC oscillator) fSYS1 22 32 40 KHz VDD=3V; on-chip RC oscillator 11
System clock (on-chip RC oscillator) fSYS1 24 32 40 KHz VDD=5V; on-chip RC oscillator 11
LCD frequency (on-chip RC oscillator) fLCD1 44 64 80 Hz VDD=3V; on-chip RC oscillator 11
LCD frequency (on-chip RC oscillator) fLCD1 48 64 80 Hz VDD=5V; on-chip RC oscillator 11
Serial data clock (WR pin) fCLK1 150 KHz VDD=3V; duty cycle 50% 11
Serial data clock (WR pin) fCLK1 300 KHz VDD=5V; duty cycle 50% 11
Serial data clock (RD pin) fCLK2 75 KHz VDD=3V; duty cycle 50% 11
Serial data clock (RD pin) fCLK2 150 KHz VDD=5V; duty cycle 50% 11
WR, RD input pulse width tCLk 3.34 µs VDD=3V; write mode (Figure 1) 11
Serial data clock rise/fall time tr,tf 120 ns VDD=3V; Figure 1 11
Serial data setup time to WR/RD clock tsu 120 ns VDD=3V; Figure 2 11
Serial data hold time to WR/RD clock th 120 ns VDD=3V; Figure 2 11
CS setup time to WR/RD clock tsu1 100 ns VDD=3V; Figure 3 11
CS hold time to WR/RD clock th1 100 ns VDD=3V; Figure 3 11
System clock (external clock) fSYS2 32 KHz VDD=3V; external clock 11
LCD frequency (on-chip RC oscillator) Flcd2 64 Hz VDD=3V; on-chip RC oscillator 11
Serial interface reset pulse width tCS 250 ns CS pin; Figure 3 11

CAD (KiCad official)

  • Symbol: HT1622B-LQ64
  • Footprint: Package_QFP:LQFP-64_7x7mm_P0.4mm
  • 3D model: LQFP-64(7x7) (KiCad packages3D, STEP)
  • 3D model files: ht1622b-lq64-etched.step / ht1622b-lq64-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht1622b-lq64.step / ht1622b-lq64.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (16 pp, sha256 629faff42f6df09d, retrieved 2026-10-21, 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