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TM1622B

Public Made by Adom

by adom

TM Shenzhen Titan Micro Elec LCD Drivers, LQFP-44(10x10). Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

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TM1622B

TM Shenzhen Titan Micro Elec · LCD Drivers · LQFP-44(10x10)

TM1622B from TM Shenzhen Titan Micro Elec, in a LQFP-44(10x10). 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 Chip Select signal; CS high disables read/write data or commands and resets serial interface; CS low enables normal read/write operations
2 NC unconnected Not connected
3 RD input READ mode clock input; data from display memory is written to DATA line on RD falling edge and latched on next RD rising edge
4 WR input WRITE mode clock input; data on DATA line is written to TM1622B on WR rising edge
5 DATA bidirectional Serial data input/output for command and display memory access
6 VSS power_in System ground reference
7 OSCI input External 32 KHz frequency source input; float this pin if using internal RC oscillator
8 VDD power_in Chip power supply input, operating range 2.4 to 5.2 V
9 VLCD input LCD bias voltage input; must be less than or equal to VDD
10 IRQ tri_state Time base or watchdog timer overflow flag output; NMOS open-drain output requires external 10 kΩ pull-up resistor
11 BZ output Buzzer output driver (positive phase); outputs differential drive signal at 2 kHz or 4 kHz
12 NC unconnected Not connected
13 BZ output Complementary buzzer output driver (negative phase); outputs differential drive signal at 2 kHz or 4 kHz
14 T1 input Bias adjustment input; not recommended for normal operation
15 T2 input Bias adjustment input; not recommended for normal operation
16 T3 input Bias adjustment input; not recommended for normal operation
17 COM0 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
18 COM1 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
19 COM2 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
20 COM3 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
21 COM4 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
22 COM5 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
23 COM6 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
24 COM7 output LCD COM driver output; part of 1/4 bias, 8 duty cycle 32×8 LCD display interface
25 SEG0 output LCD SEG driver output for segment 0; source/sink current up to 430 μA
26 SEG1 output LCD SEG driver output for segment 1; source/sink current up to 430 μA
27 SEG2 output LCD SEG driver output for segment 2; source/sink current up to 430 μA
28 SEG3 output LCD SEG driver output for segment 3; source/sink current up to 430 μA
29 SEG4 output LCD SEG driver output for segment 4; source/sink current up to 430 μA
30 SEG5 output LCD SEG driver output for segment 5; source/sink current up to 430 μA
31 SEG6 output LCD SEG driver output for segment 6; source/sink current up to 430 μA
32 SEG7 output LCD SEG driver output for segment 7; source/sink current up to 430 μA
33 SEG8 output LCD SEG driver output for segment 8; source/sink current up to 430 μA
34 SEG9 output LCD SEG driver output for segment 9; source/sink current up to 430 μA
35 SEG10 output LCD SEG driver output for segment 10; source/sink current up to 430 μA
36 SEG11 output LCD SEG driver output for segment 11; source/sink current up to 430 μA
37 SEG12 output LCD SEG driver output for segment 12; source/sink current up to 430 μA
38 SEG13 output LCD SEG driver output for segment 13; source/sink current up to 430 μA
39 SEG14 output LCD SEG driver output for segment 14; source/sink current up to 430 μA
40 SEG15 output LCD SEG driver output for segment 15; source/sink current up to 430 μA
41 SEG16 output LCD SEG driver output for segment 16; source/sink current up to 430 μA
42 SEG17 output LCD SEG driver output for segment 17; source/sink current up to 430 μA
43 SEG18 output LCD SEG driver output for segment 18; source/sink current up to 430 μA
44 SEG19 output LCD SEG driver output for segment 19; source/sink current up to 430 μA

Key specifications

Parameter Value
Manufacturer TM Shenzhen Titan Micro Elec
Package LQFP-44(10x10)
Category LED Drivers
Pins 44

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Logic supply voltage VDD -0.5 7 V 4
Input voltage range (DATA, CS, WR, RD) Vin -0.5 V 4
Operating temperature range Topr -40 85 ℃ 4
Storage temperature range Tstg -55 150 ℃ 4
ESD human body model ESD 2000 V Human body model (HBM) 4
ESD machine model ESD 200 V Machine model (MM) 4
Supply voltage VDD 2.7 5 5.2 V Tested at -45 to +85 ℃ unless noted 4
Operating temperature range Ta -20 85 ℃ 4
Operating junction temperature range Tj -40 125 ℃ 4
System clock frequency (internal RC) Fsys1 24 32 40 KHz VDD=3.0V, internal RC 4
LCD drive scan frequency (internal RC) Flcd 48 64 80 Hz VDD=3.0V, internal RC 4
WR clock frequency Fclk1 4 300 KHz VDD=5.0V, 50% duty cycle 4
WR clock frequency Fclk1 4 150 KHz VDD=3.0V, 50% duty cycle 4
RD clock frequency Fclk2 1 75 KHz VDD=5.0V, 50% duty cycle 4
RD clock frequency Fclk2 1 150 KHz VDD=3.0V, 50% duty cycle 4
CS high level width Tcsh 500 600 ns 4
WR, RD input level duration (write mode) Tclk 3.5 125 μs VDD=5.0V, write mode 4
WR, RD input level duration (read mode) Tclk 6.7 μs VDD=5.0V, read mode 4
WR, RD input level duration (write mode) Tclk 1.7 125 μs VDD=3.0V, write mode 4
WR, RD input level duration (read mode) Tclk 3.4 μs VDD=3.0V, read mode 4
Tone output frequency Ftone 1.5 2 2.5 KHz TONE 2K, internal RC 4
Tone output frequency Ftone 3 4 5 KHz TONE 4K, internal RC 4
Operating voltage VDD 2.4 5 5.2 V 5
Operating current (internal RC, no load) Idd 100 300 μA VDD=3.0V, internal RC, no load 5
Operating current (internal RC, no load) Idd 150 500 μA VDD=5.0V, internal RC, no load 5
Operating current (external clock, no load) Idd1 50 120 μA VDD=3.0V, external clock, no load 5
Operating current (external clock, no load) Idd1 120 240 μA VDD=5.0V, external clock, no load 5
Standby current (power-save mode, no load) IDD2 1 5 μA VDD=3.0V, power-save mode, no load 5
Standby current (power-save mode, no load) IDD2 1.5 10 μA VDD=5.0V, power-save mode, no load 5
Input low voltage Vil 0 0.6 V VDD=3.0V; DATA, WR, RD, CS 5
Input low voltage Vil 0 1 V VDD=5.0V; DATA, WR, RD, CS 5
Input high voltage Vih 1.2 3 V VDD=3.0V; DATA, WR, RD, CS 5
Input high voltage Vih 1.6 5 V VDD=5.0V; DATA, WR, RD, CS 5
DATA, BZ, BZ, IRQ sink current IOL1 2 4.5 mA VDD=3.0V; Vol=0.5V 5
DATA, BZ, BZ, IRQ sink current IOL1 1 3 mA VDD=5.0V; Vol=0.5V 5
DATA, BZ, BZ source current IOH1 -1 -2 mA VDD=3.0V; Voh=2.5V 5
DATA, BZ, BZ source current IOH1 -2 -3.5 mA VDD=5.0V; Voh=4.5V 5
SEG sink current Isegl 280 400 500 μA VDD=3.0V; Vseg=0.5V 5
SEG sink current Isegl 300 430 550 μA VDD=5.0V; Vseg=0.5V 5
SEG source current Isegh -110 -160 -210 μA VDD=3.0V; Vseg=2.5V 5
SEG source current Isegh -130 -180 -230 μA VDD=5.0V; Vseg=4.5V 5
COM sink current Icoml 410 460 510 μA VDD=3.0V; Vseg=0.5V 5
COM source current Icomh -120 -170 -220 μA VDD=3.0V; Vseg=2.5V 5
COM source current Icomh -140 -190 -240 μA VDD=5.0V; Vseg=4.5V 5
External clock frequency Ext_CLOCK 32 KHz 4
System clock frequency (external clock) Fsys1 32 KHz VDD=3.0/5.0V, external clock 4
LCD drive scan frequency (external clock) Flcd 64 Hz VDD=3.0/5.0V, external clock 4

CAD (KiCad official)

  • Symbol: TM1622B
  • Footprint: Package_QFP:LQFP-44_10x10mm_P0.8mm
  • 3D model: LQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: tm1622b-etched.step / tm1622b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tm1622b.step / tm1622b.glb are the bare package body.

Provenance

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

  • Datasheet: TM Shenzhen Titan Micro Elec datasheet (17 pp, sha256 414013e0854f441f, 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