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TM1818-QSOP24

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TM Shenzhen Titan Micro Elec LED Drivers, QSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TM1818-QSOP24

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

TM1818-QSOP24 from TM Shenzhen Titan Micro Elec, in a QSOP-24. 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 GND power_in Ground for control logic and the constant-current drive return path; datasheet voltages are referenced to network ground.
2 SDI input Serial data input with Schmitt-trigger buffer; data is shifted in on the CLK rising edge, with a maximum clock frequency of 25 MHz.
3 CLK input Serial shift clock input with Schmitt-trigger buffer; data shifts on the rising edge, with a maximum clock frequency of 25 MHz.
4 LE input Latch enable with Schmitt-trigger buffer; when LE is high serial data passes into the input latch, and when LE is low the data is latched.
5 OUT0 output Constant-current sink output channel 0; this output may be shorted to other outputs to obtain higher output current, with DC output current absolute maximum of 65 mA and output voltage range -0.4 V to +6.0 V.
6 OUT1 output Constant-current sink output channel 1; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
7 OUT2 output Constant-current sink output channel 2; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
8 OUT3 output Constant-current sink output channel 3; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
9 OUT4 output Constant-current sink output channel 4; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
10 OUT5 output Constant-current sink output channel 5; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
11 OUT6 output Constant-current sink output channel 6; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
12 OUT7 output Constant-current sink output channel 7; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
13 OUT8 output Constant-current sink output channel 8; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
14 OUT9 output Constant-current sink output channel 9; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
15 OUT10 output Constant-current sink output channel 10; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
16 OUT11 output Constant-current sink output channel 11; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
17 OUT12 output Constant-current sink output channel 12; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
18 OUT13 output Constant-current sink output channel 13; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
19 OUT14 output Constant-current sink output channel 14; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
20 OUT15 output Constant-current sink output channel 15; current is set by R-EXT, with output withstand voltage of 5.5 V recommended and 6.0 V absolute maximum.
21 OE input Output enable, active low: low turns on OUT0-OUT15, high turns them off; the pin has an internal pull-up to VCC of 32-48 kΩ.
22 SDO output Serial data output updated on the CLK rising edge, intended to connect to the SDI of the next device in the chain; VOH is at least VCC-0.4 V at -6 mA.
23 R-EXT bidirectional Constant-current setting pin; an external resistor to GND sets the OUT0-OUT15 current, with Riref about 1.16 V (470 Ω gives about 37 mA and 1.2 kΩ gives about 14.5 mA).
24 VCC power_in Chip supply voltage, specified from 3.0 V to 5.5 V.

Key specifications

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

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 VCC 3 5 5.5 V 5
Output withstand voltage VO 5.5 V OUT0~OUT15 5
High-level output current IOH -8 mA VCC=5V, SDO=4.5V 5
Low-level output current IOL 16 mA VCC=5V, SDO=0.5V 5
Constant output sink current IOLC 2 45 mA OUT0~OUT15, 3V<=VCC<=3.6V 5
Constant output sink current IOLC 2 60 mA OUT0~OUT15, 3.6V<=VCC<=5.5V 5
Operating temperature range TA -40 85 °C 5
Operating junction temperature range TJ -40 125 °C 5
Data shift clock frequency FCLK 25 MHz CLK 5
CLK pulse duration TWH0 15 ns CLK 5
LE pulse duration TWH1 25 ns LE 5
OE pulse duration high TWH2 60 ns OE 5
OE pulse duration low TWL2 30 ns OE 5
Setup time SDI to CLK rising TSU0 5 ns SDI to CLK rising 5
Setup time LE falling to CLK rising TSU1 12 ns LE falling to CLK rising 5
Hold time SDI after CLK rising TH0 5 ns SDI after CLK rising 5
Hold time LE falling to CLK rising TH1 12 ns LE falling to CLK rising 5
Supply voltage VCC -0.4 6 V 4
Input voltage range SDI, CLK, LE, OE VIN -0.4 V Upper limit printed as VCC+0.4 V 4
Output DC current IOUT 65 mA OUT0~OUT15 4
Output voltage range OUT0~OUT15, SDO VOUT -0.4 6 V OUT0~OUT15, SDO 4
Clock frequency FCLK 25 MHZ CLK, SDI, LE, OE 4
Operating temperature range Torp -40 85 ℃ 4
Storage temperature range Ttsg -55 150 ℃ 4
ESD human body model HBM 4000 V Human body model 4
ESD machine model MM 300 V Machine model 4
Low-level output voltage VOL 0.4 V IOL=10mA: SDO 6
Input current IIN -1 1 uA VIN=VCC or GND, SDI, CLK, LE, OE 6
Supply current ICC0 11 12 mA SDI/CLK/LE=0, OE=1, Riref open 6
Supply current ICC1 12 13 mA SDI/CLK/LE=0, OE=1, Riref=1.2K 6
Supply current ICC2 15 16 mA OUT0~OUT15 on, SDI/CLK/LE/OE=0, Riref=470Ω 6
Supply current ICC3 13 14 mA OUT0~OUT15 on, SDI/CLK/LE/OE=0, Riref=1.2K 6
Constant output current IOLO 36.3 37 37.7 mA OUT0~OUT15 on, VOUTn=1V=VOUTfix=1V, Riref=470Ω, VCC=5V, TA=25℃ 6
Output leakage current LOLKG 0.1 uA OUTn=OFF, VOUTn=VOUTfix=5.5V, OE=1, Riref=1.5K 6
Constant current error, channel to channel ΔIOLC0 -1.5 1 1.5 % OUT0~OUT15 on, VOUTn=1V=VOUTfix=1V, Riref=470Ω 6
Constant current error, chip to chip ΔIOLC1 -2 1.5 2 % OUT0OUT15 on, VOUTn=1V=VOUTfix=1V, Riref=1.5K, VCC=3V5V, TA=25℃ 6
Line regulation ΔIOLC2 -1 0.5 1 %/V OUT0OUT15 on, VOUTn=1V=VOUTfix=1V, Riref=470Ω, VCC=3V5V 6
Load regulation ΔIOLC3 -3 1 3 %/V OUT0OUT15 on, VOUTn=1V3V, VOUTfix=1V, Riref=470Ω 6
Reference voltage output VIREF 1.1 1.16 1.22 V Riref=470Ω, TA=25℃ 6
Pull-up resistance RPUP 32 40 48 kΩ OE 6
Pull-down resistance RPDWN 32 40 48 kΩ LE 6
Rise time SDO TR0 50 100 nS SDO 7
Rise time OUTn TR1 80 160 nS OUTn 7
Fall time SDO TF0 50 100 nS SDO 7
Fall time OUTn TF1 80 160 nS OUTn 7
Propagation delay CLK rising to SDO TD0 60 120 nS CLK rising to SDO transition 7
Propagation delay LE or OE to OUT0/OUT7/OUT8/OUT15 on/off TD1 100 150 nS LE rising or OE transition to OUT0/OUT7/OUT8/OUT15 on/off 7
Propagation delay LE or OE to OUT1/OUT6/OUT9/OUT14 on/off TD2 120 170 nS LE rising or OE transition to OUT1/OUT6/OUT9/OUT14 on/off 7
Propagation delay LE or OE to OUT2/OUT5/OUT10/OUT13 on/off TD3 140 190 nS LE rising or OE transition to OUT2/OUT5/OUT10/OUT13 on/off 7
Propagation delay LE or OE to OUT3/OUT4/OUT11/OUT12 on/off TD4 160 210 nS LE rising or OE transition to OUT3/OUT4/OUT11/OUT12 on/off 7
Output error time TON_ERR -50 50 nS 7

CAD (KiCad official)

  • Symbol: TM1818-QSOP24
  • Footprint: Package_SO:QSOP-24_3.9x8.7mm_P0.635mm
  • 3D model: QSOP-24 (KiCad packages3D, STEP)
  • 3D model files: tm1818-qsop24-etched.step / tm1818-qsop24-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tm1818-qsop24.step / tm1818-qsop24.glb are the bare package body.

Provenance

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

  • Datasheet: TM Shenzhen Titan Micro Elec datasheet (10 pp, sha256 ea19e116e2685809, retrieved 2026-10-19, 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 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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