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TM1621

Public Made by Adom

by adom

TM Shenzhen Titan Micro Elec LCD Drivers, LQFP-44(10x10). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

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TM1621

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

TM1621 from TM Shenzhen Titan Micro Elec, in a LQFP-44(10x10). 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 /CS input Active-low chip select; logic high resets the serial interface and invalidates all data and command transfers; logic low enables read/write communication with TM1621.
2 /RD input Active-low read clock input; TM1621 outputs RAM data onto the DATA line on the falling edge; host controller must latch data between the rising edge and the next falling edge; max serial clock 300 kHz at 3 V, 500 kHz at 5 V.
3 DATA bidirectional Bidirectional serial data input/output with external pull-up to VDD (recommended 10 kΩ ±20%); carries addresses, write data, and command bytes; output propagation delay tDD ≤ 2 µs at 3 V.
4 VSS power_in System logic ground, 0 V reference; die substrate must also be connected to a low potential.
5 VLCD power_in LCD bias supply input; voltage must be lower than VDD; adjusted via external resistor divider (e.g. VR = 15 kΩ ±20% gives VLCD = 4 V when VDD = 5 V).
6 VDD power_in Logic positive supply, 2.4-5.2 V; operating current 150-300 µA typ at 3 V (internal RC oscillator), 300-600 µA at 5 V.
7 BZ output Buzzer positive audio output; differential drive pair with /BZ for piezoelectric buzzer; selectable 2 kHz or 4 kHz tone via TONE 2K/4K command; held low when tone is disabled; IOH1/IOL1 typ ±0.4/0.5 mA at 3 V.
8 /BZ output Buzzer complementary audio output; differential pair with BZ; held low when tone is disabled or system oscillator is off; IOH1/IOL1 typ ±0.4/0.5 mA at 3 V.
9 COM0 output LCD common 0 driver output; outputs multiplex waveform at up to 256 Hz with selectable 1/2 or 1/3 bias; sink current IOL2 typ 80 µA, source current IOH2 typ 80 µA at 3 V.
10 COM1 output LCD common 1 driver output; outputs multiplex waveform at up to 256 Hz with selectable 1/2 or 1/3 bias; sink current IOL2 typ 80 µA, source current IOH2 typ 80 µA at 3 V.
11 COM2 output LCD common 2 driver output; outputs multiplex waveform at up to 256 Hz with selectable 1/2 or 1/3 bias; sink current IOL2 typ 80 µA, source current IOH2 typ 80 µA at 3 V.
12 COM3 output LCD common 3 driver output; active only when 4-COM mode is selected via BIAS&COM command; sink current IOL2 typ 80 µA, source current IOH2 typ 80 µA at 3 V.
13 SEG31 output LCD segment 31 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
14 SEG30 output LCD segment 30 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
15 SEG29 output LCD segment 29 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
16 SEG28 output LCD segment 28 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
17 SEG27 output LCD segment 27 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
18 SEG26 output LCD segment 26 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
19 SEG25 output LCD segment 25 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
20 SEG24 output LCD segment 24 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
21 SEG23 output LCD segment 23 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
22 SEG22 output LCD segment 22 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
23 SEG21 output LCD segment 21 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
24 SEG20 output LCD segment 20 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
25 SEG19 output LCD segment 19 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
26 SEG18 output LCD segment 18 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
27 SEG17 output LCD segment 17 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
28 SEG16 output LCD segment 16 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
29 SEG15 output LCD segment 15 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
30 SEG14 output LCD segment 14 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
31 SEG13 output LCD segment 13 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
32 SEG12 output LCD segment 12 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
33 SEG11 output LCD segment 11 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
34 SEG10 output LCD segment 10 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
35 SEG9 output LCD segment 9 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
36 SEG8 output LCD segment 8 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
37 SEG7 output LCD segment 7 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
38 SEG6 output LCD segment 6 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
39 SEG5 output LCD segment 5 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
40 SEG4 output LCD segment 4 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
41 SEG3 output LCD segment 3 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
42 SEG2 output LCD segment 2 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
43 SEG1 output LCD segment 1 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.
44 SEG0 output LCD segment 0 driver output; directly mirrors display RAM bit; sink current IOL3 typ 60 µA, source current IOH3 typ 40 µA at 3 V.

Key specifications

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

CAD (KiCad official)

  • Symbol: TM1621
  • Footprint: Package_QFP:LQFP-44_10x10mm_P0.8mm
  • 3D model: LQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: tm1621-etched.step / tm1621-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tm1621.step / tm1621.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 fdfac10dedab1e6c, 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