Introduction
Selecting the wrong LED driver IC is an expensive mistake to discover after the PCB has been laid out. A driver with too few grids means a board respin. The wrong interface means firmware rework. A 5V-only part on a 3.3V board means a last-minute level-shifter fix that nobody budgeted for. For purchasing managers and engineers building appliance panels, metering products and LED display modules across India, Vietnam, Thailand, Malaysia, the Philippines, the Middle East and Europe, Titan Micro Electronics (天微电子) offers a family of seven LED display driver ICs — and choosing between them is much easier when the differences are laid out side by side.
This guide compares the TM1637, TM1640, TM1650, TM1628, TM1638, TM1668 and TM1616 for real purchasing decisions: which display each one drives, which models include keypad scanning, which run on a 3.3V rail, which packages save board space, and which application each was designed for. If you already know the part you need, every section links to its dedicated supplier page on Newfly Electronics where you can request pricing and stock. For broader sourcing advice, our Titan Micro IC sourcing guide covers supplier selection in more depth.
Titan Micro LED Driver IC Portfolio at a Glance
Titan Micro’s LED driver family follows one design philosophy: drive the display directly from built-in display RAM, talk to the host MCU over a low-pin-count serial bus, and keep the external component count close to zero. What separates the seven models is display capacity, keypad scanning, supply voltage range and package. The table below summarises the full LED driver portfolio that Newfly Electronics supplies.
| Model | Display Capacity | Key Scan | Interface | Supply Voltage | Package | Typical Applications |
|---|---|---|---|---|---|---|
| TM1637 | 8 seg × 6 grids | Yes (8×2) | 2-wire (CLK/DIO) | 5V | SOP20 / DIP20 | Induction cookers, microwaves, digital clocks, small appliances |
| TM1640 | 16 seg × 8 grids (128 dots) | No | 2-wire (CLK/DIO) | 5V | SOP28 / SSOP28 | LED panels, dot-matrix displays, large display modules |
| TM1650 | 8 seg × 4 grids | Yes | 2-wire (SCL/SDA) | 2.8V – 5.5V | SOP16 / DIP16 | Air conditioners, set-top boxes, washing machines |
| TM1628 | 10 seg × 7 grids to 13 seg × 4 grids | Yes | 3-wire (STB/CLK/DIO) | 5V | SOP28 | AC control panels, microwaves, washing machines |
| TM1638 | 8 seg × 8 grids | Yes (8×3) | 3-wire (STB/CLK/DIO) | 5V | SOP28 | Appliance displays, LED modules, Arduino projects |
| TM1668 | 10 seg × 7 grids | Yes | 3-wire (STB/CLK/DIO) | 3.3V – 5.5V | SOP24 / SSOP24 | Compact appliance panels, rice cookers, EV chargers |
| TM1616 | Multi-segment LED drive | No | 2-wire (CLK/DIN) | 2.8V – 5.5V | SOP16 / DIP16 | Space-constrained PCBs, compact displays |
All seven models are in active production. Newfly Electronics holds stock of each and supplies both sample quantities and production volumes to buyers worldwide. The sections below explain where each part fits.
Model-by-Model Selection Guide
TM1637: The Volume Favourite for Small Appliance Panels
The TM1637 is the most searched Titan Micro model worldwide, and for good reason. It drives an 8-segment × 6-grid display, scans an 8×2 key matrix, and connects to the host MCU over a simple 2-wire CLK/DIO interface. It runs from a 5V supply, comes in SOP20 and DIP20 packages, and provides 8-level brightness control.
Choose the TM1637 when you are driving four to six digits plus one or two buttons on a 5V board — induction cookers, microwave ovens, digital clocks, electric kettles and small appliance panels are its home ground. It is also the standard driver on Arduino display modules, which makes it the easiest part for your firmware team to find reference code for. If you are weighing it against the TM1638 or TM1650, our three-way comparison guide covers the trade-offs in detail.
TM1640: 128-Dot Driving for LED Panels and Dot-Matrix Displays
Where the TM1637 tops out at 48 dots, the TM1640 drives 16 segments × 8 grids — 128 LEDs — which makes it the natural choice for LED panels, dot-matrix displays and larger indicator modules. It uses the same 2-wire serial interface, runs at 5V in a SOP28 or SSOP28 package, and provides 8-level brightness control. It has no keypad scanning: this is a pure display driver, and that focus is exactly why it handles high dot counts so cleanly.
Buyers commonly shortlist the TM1640 against Maxim’s MAX7219 for panel applications. Our TM1640 vs MAX7219 comparison explains where the TM1640 wins on cost and supply security.
TM1650: Four Digits, Keypad Scanning, 3.3V-Friendly
The TM1650 drives an 8-segment × 4-grid display with built-in keyboard scanning over an I2C-style 2-wire SCL/SDA bus. Two things make it stand out in the family: the wide 2.8V–5.5V supply range makes it safe on 3.3V boards, and the compact SOP16/DIP16 package keeps the BOM cost down on price-sensitive panels.
It is the standard choice for air conditioner control panels, set-top box front displays and washing machine panels — products where a 4-digit display and a handful of buttons share the same board. If you are comparing it against Holtek’s HT16K33, see our TM1650 vs HT16K33 analysis; if the decision is between the two 16-pin Titan parts, the TM1616 vs TM1650 guide breaks down the keypad-scanning difference.
TM1628: Generous Digit Counts for Appliance Control Panels
The TM1628 is configured for larger displays, from 10 segments × 7 grids up to 13 segments × 4 grids, with keyboard scanning and a 3-wire STB/CLK/DIO interface in a SOP28 package at 5V. It is built for bigger appliance control panels — air conditioner main panels, microwave ovens and washing machines where the display combines digits, icons and multiple buttons on one board.
If you are evaluating the TM1628 against Holtek’s HT1628 as a second source, our TM1628 vs HT1628 comparison covers compatibility and migration effort.
TM1638: Eight Digits Plus an 8×3 Keypad Matrix
The TM1638 drives 8 segments × 8 grids — 64 LEDs — and scans an 8×3 key matrix over a 3-wire serial interface, in a SOP28 package at 5V. It sits between the TM1637 and the TM1640 in the family: more display capacity than the TM1637, plus the keypad scanning that the TM1640 lacks. Appliance display boards, multi-digit indicator modules and hobbyist LED projects are its typical applications.
TM1668: The Compact Middle Ground
The TM1668 drives 10 segments × 7 grids with keypad scanning over a 3-wire interface — similar display muscle to the TM1628, but in a slim SOP24/SSOP24 package and with a wide 3.3V–5.5V supply range. That combination makes it the preferred driver for compact appliance control panels: rice cookers, set-top boxes, induction plates and EV charger displays where the board is small and the supply rail may not be a clean 5V.
When the shortlist comes down to the TM1668 or the TM1628, our TM1668 vs TM1628 comparison maps the decision to voltage, package and keypad size.
TM1616: Minimum Footprint, Display-Only
The TM1616 is the leanest part in the family: a compact LED display driver in SOP16/DIP16 with a 2-wire serial interface, a 2.8V–5.5V supply range, built-in display RAM and 8-level brightness control. It drops keypad scanning entirely — and for products where the display is the only output, that simplicity is a feature: fewer pins, smaller footprint, lower cost. Space-constrained PCBs, compact consumer electronics and small appliance displays are its natural applications.
LED or LCD Glass? A Note on the TM1621 Family
Everything above applies to LED displays. If your product uses segment LCD glass — energy meters, thermostats, panel meters and measurement instruments commonly do — the LED driver family is not the right tool. The TM1621B is Titan Micro’s LCD segment driver: RAM-mapped, 4-wire serial, in SSOP48/LQFP44 packages. For Holtek-based designs, our TM1621B vs HT1621B comparison covers drop-in replacement considerations.
Five Questions That Narrow the Choice
If the portfolio still looks crowded, answering five questions about your product usually leaves one clear candidate:
1. How many digits or grids does the display have? Four digits points to the TM1650 or TM1616; six digits to the TM1637; seven to eight digits to the TM1638, TM1668 or TM1628; sixteen grids or a dot-matrix panel to the TM1640.
2. Do you need keypad scanning on the same IC? If yes, the TM1616 and TM1640 are out. For a small keypad, look at the TM1650 or TM1637; for a larger matrix, the TM1638, TM1668 or TM1628.
3. Is the board 3.3V or 5V? The TM1650, TM1668 and TM1616 cover 2.8V–5.5V and run directly on a 3.3V rail. The TM1637, TM1640, TM1628 and TM1638 are 5V parts.
4. How much PCB space is available? For tight layouts, SOP16 (TM1650, TM1616) and SOP24/SSOP24 (TM1668) save the most area. SOP20 and SOP28 parts need more room but drive more segments.
5. Which serial interface does your MCU favour? The TM1650’s SCL/SDA bus maps directly onto hardware I2C peripherals. The STB/CLK/DIO 3-wire parts bit-bang comfortably on any GPIO, and the 2-wire CLK/DIO parts need only two pins either way.
How to Buy Original Titan Micro LED Driver ICs
Choosing the model is only half the decision — the other half is choosing the supplier. Titan Micro does not run a dedicated overseas sales team, so most international buyers source through China-based distributors, and the difference between a good one and a bad one shows up as either saved margin or months of quality problems. Before committing, check five things:
Original source verification. Ask where the supplier’s stock comes from and whether they can provide date-code and reel information for each batch. Consistent date codes and original factory packaging are the baseline proof of authentic parts in this category.
Supply stability. A distributor should hold stock of the models you build into production, not just offer to source them after you pay. Ask about typical lead times for repeat orders before your first shipment.
Quality inspection. Ask whether incoming batches are inspected and whether the supplier supports sample verification before you commit to bulk.
Export experience. Your supplier should handle export documentation routinely and ship to India, Southeast Asia, the Middle East and Europe without surprises at customs.
MOQ flexibility. Prototype and pilot runs need small quantities; production needs bulk pricing. A supplier who supports both saves you from juggling two sources for the same part.
Our guide on where to buy original Titan Micro ICs for international projects expands on each of these checks.
Why Source Your Titan Micro LED Drivers from Newfly Electronics
Newfly Electronics is a China-based distributor specialising in Titan Micro ICs. Because we buy through the China supply chain, our pricing is typically well below the quotes overseas buyers receive when they approach the factory directly. We hold stock across the full LED driver range covered in this guide — TM1637, TM1640, TM1650, TM1628, TM1638, TM1668 and TM1616, plus the TM1621B LCD driver — and we ship worldwide with experienced export handling.
You can order from a few pieces for prototyping up to full production volumes, and our team provides datasheets, application notes and direct technical support so your firmware team is never blocked on a driver question. Whether you need a second source for an existing design or a supply partner for a new build, we are set up to quote quickly.
Frequently Asked Questions
Which Titan Micro LED driver IC should I use for a 4-digit display with buttons?
The TM1650. It drives an 8-segment × 4-grid display, includes keyboard scanning, operates from 2.8V to 5.5V, and comes in a compact SOP16/DIP16 package. It is the standard driver for air conditioner, set-top box and washing machine front panels.
Which Titan Micro LED drivers work on a 3.3V board?
The TM1650, TM1668 and TM1616 all operate from 2.8V to 5.5V, so they run directly from a 3.3V rail. The TM1637, TM1640, TM1628 and TM1638 are 5V parts and need level shifting or a separate 5V display supply on 3.3V systems.
Is the TM1637 still in production and available to buy?
Yes. The TM1637 remains in active production and is one of the highest-volume display drivers in the global appliance market. Newfly Electronics keeps it in stock and ships worldwide, from sample quantities to bulk orders.
What is the difference between the TM1638 and the TM1668?
Both are 3-wire LED drivers with keypad scanning. The TM1638 drives 8 segments × 8 grids in SOP28 at 5V; the TM1668 drives 10 segments × 7 grids in a slimmer SOP24/SSOP24 package and accepts 3.3V–5.5V. For compact or 3.3V designs, the TM1668 is usually the better fit.
Can Newfly Electronics provide datasheets and small quantities?
Yes. We provide official datasheets and application notes with every inquiry, and we support orders from single samples for prototyping through to bulk production quantities — with the same authenticity guarantee at both ends.
Does Newfly Electronics ship to India, Southeast Asia and Europe?
Yes. We export regularly to India, Vietnam, Thailand, Malaysia, the Philippines, the Middle East, Europe and the USA, with standard export documentation for each destination.
Request a Quotation for Titan Micro LED Driver ICs
If you have identified the right model from this guide — or if you would like our recommendation for your display specification — send us your requirement and we will reply with pricing, stock and lead time, usually within one business day.
Email sales@newflyelectronics.com or message us on WhatsApp at +86 15112635657. Include your target model, quantity and destination country so we can quote accurately. Datasheets and samples are available on request.