TM1809 LED Driver IC Supplier China

TM1809 is the middle device in Titan Micro’s single-wire pixel driver family: nine constant-voltage sink channels, arranged as three RGB groups, in a 14-pin SOP14. Buyers arrive at this part number from two directions. Some are moving up from TM1804 because a three-pixel module needs one package instead of three. Others are moving down from TM1812 because a SOP16 no longer fits the strip, or because their controller runs at 400 kbps and TM1812 will not accept that clock.

Both routes converge on the same commercial problem. TM1809 is a Chinese-market part with no export sales desk behind it, so an overseas buyer searching for stock usually finds either a reseller quoting a retail-level price or a broker offering a reel with no traceable origin. This page covers what the part is, the specification that decides whether it fits your board, and how to buy it without inheriting a compatibility or authenticity problem.

TM1809 at a glance

Manufacturer: Shenzhen Titan Micro Electronics (天微电子). Function: 9-channel LED driver and control circuit with an integrated MCU digital interface, data latch and high-voltage output stage. Each device holds 24 bits per pixel for three pixels, drives them from a single-wire return-to-zero cascade, and reshapes the remainder of the data stream before forwarding it on DOUT. Because the signal is regenerated at every device, a chain of several hundred pixels does not progressively distort.

The output stage is a low-side sink rated to 24 V, which is what puts this part on 12 V and 24 V decorative rails. VDD itself is a 5 V logic supply with an internal regulator; a series resistor on the VDD pin lets the device run from a 6–24 V rail without a second supply. Grey scale is 256 levels per channel with an effective 1024-level resolution at the low end of the brightness curve, and PWM refresh is specified at not less than 400 Hz — the threshold that keeps a fixture from banding on camera.

Packages are SOP14 and DIP14. The DIP14 option matters more than it looks: it is the only through-hole body in this family, which is why TM1809 still appears in prototype rigs and in repair stock for installed fixtures.

TM1809 technical specifications

Parameter	Value	Note for design
Driver channels	9 (three RGB groups)	3 pixels per device, 24 bits each
Package	SOP14, DIP14	Body length roughly half a SOP16
Interface	Single-wire cascade, DIN in / DOUT out	Internal latch and reshape at every device
Data rate	400 kbps or 800 kbps, selected by SET	SET to VDD = low speed; SET floating = high speed
Cascade at 30 fps	≥540 pixels low speed, ≥1080 high speed	Datasheet minimum, not a design target
Grey scale	256 levels per channel	1024-level equivalent at low brightness
PWM refresh	≥400 Hz	Oscillator 400 kHz / 800 kHz per mode
Logic supply VDD	5 V ±10 % (4.5–5.5 V)	Internal 5 V regulator
Input voltage range	6–24 V via external series resistor on VDD	Size the resistor for your rail and check its dissipation
Output withstand	24 V	Some feature lists quote 30 V — design to 24 V
Low-level output current	50 mA min to 80 mA max at VO = 0.3 V	Sink capability, not a regulated current source
DOUT drive	10 mA at VO = 0.4 V	Relevant to long, capacitively loaded runs
Propagation delay	tPLZ ≤300 ns, tPZL ≤100 ns	DIN to DOUT, CL = 15 pF
Output fall time	≤120 µs at CL = 300 pF	Sets the practical limit on chain capacitance
Dynamic current	≤1 mA, no load	Per device, display off
Power dissipation	250 mW at 25 °C; 400 mW absolute maximum	The two figures sit in different tables of the same document
Thermal resistance	Rth(j-a) 79.2 to 190 °C/W	Board-dependent, quoted as a range
Operating temperature	−40 to +80 °C; normal operating range −20 to +70 °C	Derate against the ambient inside the fixture
Storage temperature	−65 to +150 °C	—

Three notes on that table, because they explain most of the arguments we arbitrate between a buyer and their layout team.

The dissipation figure has two values. The absolute maximum table quotes 400 mW; the electrical characteristics table quotes 250 mW at 25 °C. Treat 250 mW as the working number, then derate for the ambient inside your enclosure. A thermal calculation built on 400 mW is built on the wrong number.

The switching table quotes the base rate at 400 kbps. The 800 kbps mode exists and is selected by leaving SET floating, but do not read the two modes as headroom. Select the mode with the SET pin and let the controller run inside the specified timing window; overclocking a 400 kbps configuration produces intermittent dropouts that are very hard to diagnose in the field.

Reseller listings differ from the datasheet. Catalogue pages for this part commonly show 60 mA output current and a −40 to +85 °C range. The Titan Micro document specifies 50–80 mA at 0.3 V and +80 °C. If your qualification report cites the catalogue figures, it cites numbers the factory does not publish. We send the datasheet revision with the quotation so the discrepancy is settled before your test house sees it.

The pinout problem nobody mentions in the datasheet summary

TM1809 assigns nine outputs across three groups. Group 3 occupies pins 4, 5 and 6 in the order red, green, blue. Groups 1 and 2 occupy pins 11–13 and 8–10 in the reverse order: blue, green, red.

The full pinout: 1 VDD, 2 SET, 3 DOUT, 4 3OUTR, 5 3OUTG, 6 3OUTB, 7 GND, 8 2OUTB, 9 2OUTG, 10 2OUTR, 11 1OUTB, 12 1OUTG, 13 1OUTR, 14 DIN.

An engineer who routes pins in numeric order and assumes RGB throughout gets group 3 correct and groups 1 and 2 channel-swapped. On a test bench that reads as a colour error across two-thirds of the fixture — reds arriving as blues — and it is usually misdiagnosed as a firmware byte-order bug, which is where the week disappears. Fix it on the layout before the first panel is assembled, or apply the swap in the pixel map and document it. It is the most common support question we receive on this part, and it is a documentation problem, not a silicon problem.

Where TM1809 is used commercially

The datasheet names point sources, guardrail tube, flexible strip and indoor/outdoor large screens. In current order flow the part concentrates in four places.

Guardrail and architectural tube. Three LEDs per tube segment is a common mechanical pitch, which makes nine channels the natural fit. Buyers in Malaysia, Thailand and the Middle East specify TM1809 for facade and bridge tube because the pitch matches the product and the 24 V output tolerance suits long runs on a shared rail.

Mid-density flexible strip. Assemblers in India and Vietnam use TM1809 where a 60-pixel-per-metre strip would otherwise need 60 SOP8 devices per metre. Three pixels per package removes two-thirds of the placements, and with them two-thirds of the cascade insertion points where a cold joint stops everything downstream.

Stage and event fixtures. European and US buyers in this segment ask about refresh rate before price, because the fixture will be filmed. The ≥400 Hz PWM specification answers that, and it is also why they do not accept an unbranded equivalent on a quotation.

Repair stock and validation builds. The DIP14 option keeps TM1809 in demand for servicing older boards, and repair buyers typically want 50 to 500 pieces — exactly the band a factory export desk will not quote. Design houses ordering 20 to 100 pieces for a validation build sit in the same band.

TM1809 against TM1804 and TM1812

	TM1804	TM1809	TM1812
Channels / pixels	3 / 1	9 / 3	12 / 4
Package	SOP8, DIP8	SOP14, DIP14	SOP16, DIP16
Cascade at 30 fps	≥512 low / ≥1024 high	≥540 low / ≥1080 high	≥1080, 800 kbps only
Data rate	400 / 800 kbps via SET	400 / 800 kbps via SET	800 kbps fixed, no SET pin
Choose it when	Single pixel, narrow board, prototype	Three-pixel pitch, 400 kbps controller, SOP14 footprint	Four-pixel groups, highest density, 800 kbps controller

The decision usually comes down to two questions. What is your controller’s data rate — if it is fixed at 400 kbps, TM1809 is the highest channel count available and TM1812 is not an option. And what is your mechanical grouping — if the product already clusters three LEDs, TM1809 removes a package per cluster without changing the fixture design. The full arithmetic is in our TM1804 vs TM1809 vs TM1812 comparison.

Why TM1809 is difficult to buy from outside China

Three structural reasons, and none of them is about the part being scarce.

No export sales desk. Titan Micro sells into the domestic Chinese market through its own channel. There is no English-language quotation desk, no overseas stock list and no distributor programme a foreign buyer can join. An enquiry sent to the factory from Europe or India is either redirected or quoted at a volume that assumes a domestic contract manufacturer.

MOQ set by the carton, not by the buyer. Factory quotations on this family assume production reels. A buyer who needs 200 pieces for a repair batch or a validation build falls below that line, and the practical answer is a distributor already holding the part in reels and able to cut from them.

Price quoted to the wrong market. The overseas price a buyer sees first is usually a reseller price built on a domestic purchase plus freight plus margin, with no visibility into the level below it. The same part number can differ by a factor across listings on one marketplace, which is why price comparison without a stock and origin check tells a buyer very little.

The conclusion: the part is available and the supply chain is stable. The constraint is the channel, not the silicon.

How to specify TM1809 in an enquiry

Most quotation delays on this part come from an incomplete first message, not from price negotiation. Six items close it in one round:

Part number and package. “TM1809 SOP14” is quotable. “TM1809” alone is not, because DIP14 is a separate line item at a separate price.
Quantity, and whether it is a one-off or a repeat. A 200-piece repair batch and a 20,000-piece annual programme are different quotations.
Controller and data rate. Naming both lets us confirm low-speed or high-speed mode before you commit, and catches the case where TM1812 was specified against a 400 kbps bus.
Application and operating environment. A sealed aluminium profile at 60 °C ambient needs a different thermal answer from an open indoor board.
Destination country and Incoterm. A price without an Incoterm is not comparable to another supplier’s price.
Whether samples are needed first. Say so in the first message, because it changes the dispatch sequence.

Two verification points sit on your side. Ask for the current datasheet revision with the quotation, because circulating copies quote a 30 V output withstand and a 400 mW dissipation figure, and both are the wrong numbers to design against. And check date-code consistency when the reel arrives: one reel carrying three different date codes is the signature of a lot re-taped from remnants.

TM1809: where it does not belong

Specification tables tell you what a part can do. Design failures come from what it cannot do. Before you commit a TM1809 to a production board, check these cases — if any of them applies to your design, this is the wrong part and we will say so.

your product is a segment display — digits, a 7-segment readout or an appliance control panel — TM1809 carries no digit decode, no display RAM and no keyboard scan. That job is TM1637 or TM1650 in a 16-pin package, TM1628 or TM1668 in SOP24/SOP28, or TM1638 where you need more keys.
your panel is LCD glass — the TM18xx family drives LEDs only. Use TM1621B, TM1621C or TM1621D. This is the most common mis-order in the Titan Micro range and no firmware change can recover it.
your controller is fixed at 400 kbps and you were quoted TM1812 for the extra channel — TM1812 has no SET pin and runs only at 800 kbps. Stay on TM1809 in low-speed mode — it is the highest channel count available to you on a 400 kbps bus.
your MCU rail is 3.3 V and you intended to drive DIN from it directly — the logic supply is 5 V ±10 %. Do not use the part as a level translator; add a real level shifter or move the function to a part specified for the lower rail.
your LED anode rail is above 24 V — the limit table specifies 24 V output withstand. Some feature lists quote 30 V; design to 24 V and treat the difference as revision noise, not headroom.
you need a regulated, matched channel current rather than a switched sink — these are low-side sinking outputs. Channel current is set by your supply, LED forward voltage and series element. If per-channel current accuracy is a design requirement, this is the wrong architecture and we will say so before quoting.
your programme requires AEC-Q100 qualification or a formal PPAP package — these are commercial-grade parts. If the line requires automotive qualification paperwork we will decline the quotation rather than imply a grade the part does not carry.

Working with Newfly: the numbers

Buyers evaluating a supplier want the commercial parameters stated, not implied. Here is ours. Where a figure depends on your quantity, package or destination, we say so rather than publishing a number that will not hold.

Item	What we commit to
Sample order	Sample and small-batch quantities are supported. Sample fee, freight terms and dispatch time are confirmed in writing with each quotation.
Minimum order	Flexible. We support partial-reel and small-batch quantities for first orders and scale with you.
Lead time	Confirmed in writing per order, against the quantity and destination you specify.
Inspection	Marking, packaging and date-code verification before dispatch. Tell us your acceptance criteria and we will align to them.
Defect claims	The defect resolution process is agreed in writing before the order, not after a problem appears.

When we tell you not to buy

A supplier who accepts every enquiry without question is not screening anything. These are the situations where we will recommend against the purchase:

You have specified TM1809 for a fixture that will sit in a sealed profile at high ambient and you are running all nine channels near the 80 mA limit. We will show you the dissipation arithmetic and recommend a higher device count instead of the cheaper BOM.
The lot offered to you has no traceable origin and mixed date codes on a single reel. We will describe the risk rather than quote it as normal stock.
You want a full carton to hold speculative stock before the part is validated on your own board. We will say so before you commit working capital to an unproven design.
You are ordering against a 400 kbps controller but the drawing says TM1812. We will query it rather than ship a part that cannot accept your clock.
Your procurement rules require a franchised-channel paper trail that only the manufacturer’s authorised channel can issue. We are an export distributor, not the franchised channel. If that paper trail is mandatory for the line, we are not your supplier for it.
Your target price can only be met with a lot we cannot verify as original Titan Micro product. We will decline the order rather than ship an unverifiable lot.
You are asking us to quote WS2811 or another vendor’s pixel driver alongside TM1809. We supply the Titan Micro side only and will say so rather than imply stock we do not hold.

Why buyers source TM1809 from Newfly Electronics

Newfly Electronics is an export distributor for Titan Micro (天微电子) display and LED driver ICs. We are not the factory and we do not pretend to be: the value we add is that a buyer outside China can reach this part at China supply-chain pricing, in the quantity they actually need, with a datasheet revision and a shipping window in writing.

Specifically on TM1809: we hold stock across SOP14 and DIP14, quote from real stock rather than from a factory lead-time assumption, and support both small validation quantities and production reels. Export documentation, packing and freight to India, Malaysia, Thailand, Vietnam, the Philippines, the Middle East, Europe and the United States are routine rather than exceptional. Technical support in English covers the pinout swap described above, SET pin configuration, cascade budgeting and thermal derating — the four questions that decide whether this part works in your fixture.

We supply the Titan Micro side of every comparison on this site and stock no other vendor’s pixel drivers. That has a commercial cost for us when a buyer would rather have a cheaper substitute, and it is the reason a substitution claim from us is worth checking rather than discounting.

Related pages: the TM1804 supplier page for the single-pixel device, the Titan Micro LED driver IC selection guide for the whole range, and where to buy Titan Micro IC chips online for the channel comparison.

FAQ: buying TM1809

Where can I buy TM1809 outside China?

Through an export distributor holding stock, not through the factory. Titan Micro has no overseas sales desk, so the practical route is a China-based distributor who quotes in English, ships against your Incoterm and provides the datasheet revision with the quotation. Newfly Electronics supplies TM1809 in SOP14 and DIP14 to buyers in India, Southeast Asia, the Middle East, Europe and the United States.

Is TM1809 still in production?

Yes. It is a current Titan Micro part, not an end-of-life line, and it remains in regular production alongside TM1804 and TM1812. Availability at distributor level moves with demand cycles in the architectural and stage lighting markets, which is why we confirm stock against your quantity rather than publishing a live figure.

What package does TM1809 come in?

SOP14 as standard, with DIP14 also offered by the factory. They are separate line items with separate pricing and separate MOQ logic — specify which one you need.

What is the difference between TM1809 and TM1812?

Channel count and data-rate flexibility. TM1809 has 9 channels (3 pixels) and selects 400 or 800 kbps with the SET pin. TM1812 has 12 channels (4 pixels) and runs only at 800 kbps, with no SET pin. On a controller fixed at 400 kbps, TM1809 is the higher-channel option.

Can TM1809 replace TM1804 on an existing board?

Not as a drop-in. The protocol and the 24 bits per pixel are identical, so the data frame does not change, but the package, pinout and device count per chain all differ. A board designed for TM1804 needs re-layout before TM1809 can be used, and the firmware pixel map needs updating to reflect three pixels per device.

Why are my colours swapped on two of the three output groups?

Because the pinout orders the groups differently. Group 3 runs red, green, blue on pins 4–6; groups 1 and 2 run blue, green, red on pins 11–13 and 8–10. Correct it in the layout or in the pixel map. It is the most common TM1809 support question we handle.

Does Newfly Electronics provide the TM1809 datasheet?

Yes, the current Titan Micro revision, sent with the quotation rather than separately. We send it deliberately: circulated copies quote a 30 V output withstand and a 400 mW dissipation figure, and neither is the number to design against.

Can I order a small quantity of TM1809 before committing to production?

Yes. Sample and small-batch quantities are supported, including partial-reel cuts for repair and validation builds. Sample fee, freight terms and dispatch time are confirmed in writing with each quotation rather than published as a fixed figure here.

Do you supply WS2811 or equivalent pixel drivers?

No. We supply the Titan Micro side only. If a cross-brand substitute is what your design needs, we will say that it is outside our stock rather than quote a part we do not hold.

Request a Quotation

Send us the part number, the package and the quantity you need. We will reply with price, confirmed stock and lead time for the the package, quantity and destination you need.

Contact Newfly Electronics
Email: sales@newflyelectronics.com
WhatsApp: +86 15112635657