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TM1621D

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by Ray

TM Shenzhen Titan Micro Elec LCD Drivers, QSOP-24. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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TM1621D

TM Shenzhen Titan Micro Elec · LCD Drivers · QSOP-24

TM1621D from TM Shenzhen Titan Micro Elec, in a QSOP-24. 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 SEG17. Drives one LCD segment line with the multi-level bias waveform (V0/V1/V2/V3).
2 SEG16 output LCD segment output SEG16.
3 SEG15 output LCD segment output SEG15.
4 SEG14 output LCD segment output SEG14.
5 SEG13 output LCD segment output SEG13.
6 SEG12 output LCD segment output SEG12.
7 SEG11 output LCD segment output SEG11.
8 SEG10 output LCD segment output SEG10.
9 SEG9 output LCD segment output SEG9. Only SEG9-SEG22 outputs are physically available (RAM row 0-8 is not routed to pads).
10 /CS input Active-low chip select input for the serial interface (needs an external pull-up resistor, RPH ≈ 40-150 kΩ). When /CS is high the serial interface is reset and any data/commands are ignored; a low level enables writes into TM1621D.
11 /WR input Serial write-clock input (needs an external pull-up resistor). On the rising edge of /WR the level on DATA is latched into TM1621D. fCLK max 300 kHz @ 3 V, 500 kHz @ 5 V.
12 DATA bidirectional Serial data input/output for command and RAM data transfer (external pull-up required). Address, command and data bits are shifted in on /WR rising edges; also used as an output during read operations (tDD ≤ 2 µs @ 3 V, 1 µs @ 5 V).
13 VSS power_in Negative supply / ground reference (0 V).
14 VLCD power_in LCD driver supply input. Sets the LCD bias reference (V3 rail); must satisfy VLCD < VDD. Typical use: VDD=5 V, VLCD=4 V through a ~15 kΩ potentiometer (VR) for contrast trim.
15 VDD power_in Positive logic supply, 2.4 V to 5.2 V. IDD ≈ 150-300 µA (3 V, internal RC osc, no load).
16 COM0 output LCD common (backplane) output COM0. Multiplexed drive with 2/3/4 commons selectable by BIAS&COM command.
17 COM1 output LCD common (backplane) output COM1.
18 COM2 output LCD common (backplane) output COM2 (only active in 3- or 4-COM modes).
19 COM3 output LCD common (backplane) output COM3 (only active in 4-COM mode).
20 SEG22 output LCD segment output SEG22.
21 SEG21 output LCD segment output SEG21.
22 SEG20 output LCD segment output SEG20.
23 SEG19 output LCD segment output SEG19.
24 SEG18 output LCD segment output SEG18.

Key specifications

Parameter Value
Manufacturer TM Shenzhen Titan Micro Elec
Package QSOP-24
Category LED Drivers
Pins 24

CAD (KiCad official)

  • Symbol: TM1621D
  • Footprint: Package_SO:QSOP-24_3.9x8.7mm_P0.635mm
  • 3D model: QSOP-24 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: TM Shenzhen Titan Micro Elec datasheet (9 pp, sha256 cf34f4d92c95fd42, 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).

Datasheet PDF