Introduction
When you are designing a digital display module, appliance control panel, or small HMI board, the LED driver IC you choose directly affects BOM cost, PCB size, software complexity, and supply reliability. Two part numbers that frequently appear together in buyer searches are the TM1650 from Titan Micro Electronics and the HT16K33 from Holtek Semiconductor. Both devices can drive multi-digit seven-segment LED displays while scanning a key matrix, yet they differ in package, voltage range, interface details, and—most importantly for procurement teams—availability and price in the China supply chain.
This article compares TM1650 vs HT16K33 from a purchasing and engineering perspective. If you are sourcing a LED display driver with keyboard scan for consumer appliances, industrial controllers, or Arduino-based modules, this guide will help you decide which IC fits your project and where to buy it reliably.
Product Overview: TM1650 and HT16K33
TM1650 — Titan Micro Electronics
The TM1650 is an LED driver IC with integrated keyboard scan, designed primarily for home appliance displays, set-top boxes, air conditioner panels, and small industrial control boards. It communicates via a 2-wire serial interface, supports common cathode or common anode LED arrangements depending on configuration, and offers 8-level brightness control. Newfly Electronics supplies the original TM1650 in SOP16 and DIP16 packages with stable China stock and competitive export pricing.
HT16K33 — Holtek Semiconductor
The HT16K33 is a popular LED controller/driver with a built-in 16-key scan interface and an I2C bus. It is widely used in display modules for Arduino, Raspberry Pi, and embedded projects because of its simple I2C protocol and well-documented libraries. The device is available in multiple packages, including SOP20 and SSOP20, and can drive up to 128 LED segments or an 8×8 matrix.
Technical Specifications
| Parameter | TM1650 | HT16K33 |
| Manufacturer | Titan Micro Electronics | Holtek Semiconductor |
| Display segments | 8 segments × 4 digits (typical) | 16 segments × 8 digits / 128 LEDs |
| Key scan | Yes, 7×4 matrix | Yes, 3×8 key matrix (16 keys) |
| Interface | 2-wire serial | I2C (up to 400 kHz) |
| Operating voltage | 2.8 V to 5.5 V | 4.5 V to 5.5 V (standard) |
| Brightness levels | 8 levels | 16 levels |
| Package options | SOP16, DIP16 | SOP20, SSOP20, QFN |
| Display arrangement | Common cathode LED, common anode compatible | Common cathode LED / matrix |
| Typical applications | Appliances, air conditioners, set-top boxes | Arduino modules, instrumentation, HMI boards |
Applications and Target Markets
Both ICs serve LED display applications, but their sweet spots differ.
TM1650 applications: washing machine panels, microwave ovens, induction cookers, air conditioner remote controllers, set-top box front panels, small appliance displays, and compact industrial control boards. The low voltage range (down to 2.8 V) makes it attractive for battery-backed or 3.3 V appliance subsystems. Strong demand comes from manufacturers in India, Vietnam, Thailand, Malaysia, and the Middle East.
HT16K33 applications: maker modules, digital clocks, multi-digit meters, LED matrix badges, Arduino/Raspberry Pi shields, and general embedded displays. Its I2C addressability makes it ideal when several display modules share the same bus. It is especially popular in Europe and the USA among small-batch electronics designers.
If you are building a mass-produced appliance and need a low-cost, proven display driver, the TM1650 is usually the better fit. If you are prototyping or building low-volume modules where I2C libraries and display flexibility matter, the HT16K33 is often preferred.
TM1650 vs HT16K33: Side-by-Side Comparison
| Feature | TM1650 | HT16K33 |
| Interface complexity | Simple 2-wire, Titan protocol | Standard I2C, wide library support |
| Voltage flexibility | 2.8–5.5 V, works on 3.3 V and 5 V | 4.5–5.5 V typical |
| Segment capacity | Up to 32 segments | Up to 128 segments |
| Brightness control | 8 levels | 16 levels |
| Package size | Compact SOP16 / DIP16 | SOP20 / SSOP20 |
| Library ecosystem | Titan libraries, appliance-focused | Arduino, Adafruit, PlatformIO libraries |
| Price level | Lower in China supply chain | Higher in Western distribution |
| Availability | Strong from Newfly Electronics China | Available through global distributors |
The HT16K33 offers more segments and finer brightness control, plus the convenience of I2C. The TM1650 wins on cost, package compactness, voltage range, and suitability for appliance-grade production. In many cases, they are not direct one-to-one replacements because the software protocol and display mapping differ, but they overlap in 4-digit seven-segment display projects.
Buying Guide: How to Choose the Right LED Driver IC
Before placing an order, consider the following procurement checklist:
1. Verify the original source. Counterfeit LED driver ICs are common. Request Titan Micro or Holtek authorization proof, batch code photos, and datasheet consistency. Newfly Electronics sources TM1650 directly from the original supply chain.
2. Match the interface to your MCU. If your firmware team already uses I2C, the HT16K33 may save development time. If your platform uses a simple 2-wire protocol or runs on a low-pin-count MCU, the TM1650 is cleaner.
3. Check voltage and package. For 3.3 V appliance logic, the TM1650 has an advantage. For 5 V Arduino-style designs, both work well.
4. Evaluate MOQ and lead time. China-based distributors like Newfly can support small quantity samples and bulk orders with shorter lead times than overseas catalog distributors.
5. Ask for technical support. A reliable supplier should provide the datasheet, reference schematic, and help with code porting if you are switching from HT16K33 to TM1650.
Why Choose Newfly Electronics as Your IC Supplier
Newfly Electronics is a China-based distributor focused on Titan Micro Electronics ICs. Our team includes former Titan Micro employees who understand the product line, pricing structure, and export process.
When you source TM1650, TM1637, TM1640, or other Titan Micro display drivers from Newfly Electronics, you benefit from:
- Direct access to the China supply chain for competitive pricing
- Original Titan Micro ICs with batch traceability
- Small quantity samples and bulk production orders
- Fast export service to India, Southeast Asia, the Middle East, Europe, and the USA
- Technical support including datasheet, application notes, and schematic review
- Flexible payment and shipping terms for overseas buyers
Whether you need a TM1650 supplier, a TM1637 IC supplier, or a TM1640 LED driver supplier, Newfly Electronics can support your project from sample to mass production.
For related comparisons, see our TM1640 vs MAX7219 guide.
FAQ
Can I use TM1650 as a direct replacement for HT16K33?
Not directly. The HT16K33 uses I2C and supports more segments, while the TM1650 uses a 2-wire serial interface. You can replace one with the other only if you redesign the firmware and possibly the PCB layout.
Where can I buy original TM1650 IC?
You can request a quotation from Newfly Electronics. We supply original Titan Micro TM1650 in SOP16 and DIP16 packages with competitive export pricing and technical support.
Which is cheaper, TM1650 or HT16K33?
In the China supply chain, the TM1650 is generally more cost-effective for appliance and small display projects. HT16K33 pricing is higher through Western distributors, especially for small quantities.
Does Newfly Electronics provide the TM1650 datasheet?
Yes. We provide the official Titan Micro TM1650 datasheet, package drawings, and application guidance upon request. Contact us at sales@newflyelectronics.com or WhatsApp +86 15112635657.
Is TM1650 suitable for Arduino projects?
Yes, the TM1650 can be used in Arduino projects, but it requires a Titan-specific 2-wire library. The HT16K33 is more common in the Arduino ecosystem due to its I2C interface and existing library support.
Get a Quotation for TM1650 and HT16K33
Choosing between TM1650 and HT16K33 depends on your display size, MCU interface, voltage requirements, and production volume. If you are ready to source, Newfly Electronics can provide pricing, stock status, and technical support for both options.
Contact us today to request a quotation or to receive the TM1650 datasheet.
Email: sales@newflyelectronics.com
WhatsApp: +86 15112635657
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