Introduction
The TM1621B is a RAM-mapping LCD segment display driver IC manufactured by Titan Micro Electronics (天微电子), designed for direct-glass LCD panels in low-power measurement and display applications. If you arrived here by searching “TM1621B supplier,” “TM1621B datasheet,” or “TM1621B price,” you are likely sourcing this component for energy meter manufacturing, thermostat production, or industrial instrumentation — and you need a reliable supply channel with competitive pricing and technical support.
Finding a stable TM1621B IC supplier is essential for production continuity. LCD driver ICs serve a more specialized market than LED driver ICs, and not every distributor carries the TM1621 series in stock. As a dedicated distributor of Titan Micro components, Newfly Electronics provides original TM1621B ICs with full datasheet support, competitive China supply chain pricing, and export services tailored to overseas electronics manufacturers.
Product Overview
The TM1621B belongs to Titan Micro’s LCD driver IC family. While Titan Micro is best known for LED driver ICs like the TM1637 and TM1640, the TM1621 series is specifically engineered for LCD glass panels — making it the preferred choice for battery-operated devices where power consumption must be minimized.
Key characteristics of the TM1621B LCD driver IC:
- Manufacturer: Titan Micro Electronics (天微电子)
- Function: RAM-mapping LCD segment display driver
- Display capacity: 32 segments x 4 commons (128 segments total)
- Interface: 4-wire serial (CS, WR, DATA, RD)
- Package options: SSOP48, LQFP44
- Display memory: Internal RAM stores segment data — MCU writes once, IC maintains display independently
- Applications: Energy meters, thermostats, measurement instruments, industrial display panels
The RAM-mapping architecture is a significant advantage in measurement applications. Unlike LED driver ICs that require continuous refresh from the MCU, the TM1621B stores display data in its internal RAM. The MCU writes segment data once, and the TM1621B maintains the LCD output autonomously — freeing the MCU for measurement, calculation, and communication tasks. This is particularly valuable in battery-powered energy meters where MCU sleep time directly impacts battery life.
Technical Specifications
| Parameter | TM1621B Specification |
|---|---|
| Manufacturer | Titan Micro Electronics (天微电子) |
| IC Type | LCD Segment Display Driver |
| Display Configuration | 32 segments x 4 commons (128 segments) |
| Drive Method | RAM-mapping (internal display memory) |
| Serial Interface | 4-wire (CS, WR, DATA, RD) |
| Operating Voltage | 2.4V – 5.2V |
| LCD Bias / Duty | 1/3 bias, 1/4 duty |
| Built-in Oscillator | Yes (RC oscillator) |
| Package Options | SSOP48, LQFP44 |
| Operating Temperature | -40C to +85C |
| Power Consumption | Low (suitable for battery-powered devices) |
| Display RAM | 16 x 8 bits (internal) |
Note: For complete electrical characteristics, timing diagrams, and register maps, request the official TM1621B datasheet from Newfly Electronics at sales@newflyelectronics.com.
Applications and Use Cases
The TM1621B LCD driver IC is widely used in applications where low power consumption and direct LCD glass driving are required. Common use cases include:
Energy Meters and Smart Metering
In markets like India, Vietnam, and Thailand, energy meter manufacturers rely on LCD driver ICs to display consumption data, tariff indicators, and diagnostic codes. The TM1621B’s RAM-mapping architecture allows the metering MCU to update the display only when values change, conserving battery power in prepaid meter designs. Newfly Electronics supplies TM1621B ICs to energy meter manufacturers across Southeast Asia with competitive pricing and stable stock availability.
Thermostats and HVAC Controllers
Thermostat displays require clear LCD segments for temperature readings, mode indicators, and schedule information. The TM1621B drives up to 128 segments — sufficient for multi-field thermostat displays showing current temperature, setpoint, mode, fan speed, and time simultaneously. Manufacturers in Malaysia, the Philippines, and the Middle East use this IC in programmable thermostats for residential and commercial HVAC systems.
Measurement Instruments
Digital multimeters, panel meters, and process controllers often use LCD panels with custom segment layouts. The TM1621B’s flexible segment mapping supports custom LCD glass designs, making it suitable for specialized instrumentation. For instrument manufacturers that use LED displays instead of LCD, Newfly also supplies the TM1628 LED display driver and the TM1650 LED driver IC.
Consumer Electronics with LCD Displays
Remote controls, calculators, digital clocks, and battery-powered display devices benefit from the TM1621B’s low power consumption and autonomous display maintenance. The 4-wire serial interface integrates easily with standard MCUs, and the built-in RC oscillator eliminates external clock components, reducing BOM cost and PCB area.
TM1621B vs HT1621B: LCD Driver IC Selection
When sourcing an LCD segment driver, engineers often compare the TM1621B with the HT1621B from Holtek Semiconductor. Both are 32×4 LCD drivers with similar segment capacity, but there are important differences to consider when making a purchasing decision:
| Feature | TM1621B (Titan Micro) | HT1621B (Holtek) |
|---|---|---|
| Display Capacity | 32 x 4 (128 segments) | 32 x 4 (128 segments) |
| Interface | 4-wire serial | 3-wire serial |
| RAM Mapping | Yes (internal RAM) | Yes (internal RAM) |
| Package | SSOP48, LQFP44 | SSOP48, DIP48 |
| Built-in Oscillator | Yes | Yes |
| Operating Voltage | 2.4V – 5.2V | 2.4V – 5.2V |
| Price Advantage | Lower (distributor pricing) | Higher (premium brand) |
| Availability in China | Direct factory source | Limited渠道 |
The primary difference is the interface: the TM1621B uses a 4-wire interface while the HT1621B uses a 3-wire interface. If your existing firmware is written for the HT1621B, migrating to the TM1621B requires interface timing adjustments — but the cost savings from distributor pricing often justify the engineering effort. A detailed comparison guide will be published in our upcoming TM1621B vs HT1621B article.
Buying Guide: How to Source TM1621B LCD Driver ICs
Sourcing the TM1621B requires attention to several factors that directly impact your production schedule and product quality:
1. Original Source Verification
Always confirm that TM1621B ICs are genuine Titan Micro Electronics components. Counterfeit or remarked ICs may have incorrect segment mapping, unreliable oscillator performance, or poor LCD drive quality that causes ghosting or missing segments. Newfly Electronics sources directly from Titan Micro’s authorized channels and provides lot tracking information on request.
2. Stock Availability and Lead Time
LCD driver ICs are produced in smaller volumes than mainstream logic ICs. Before placing an order, confirm current stock levels and lead times. Newfly maintains buffer stock of TM1621B in SSOP48 and LQFP44 packages to support both prototype and production orders. For repeat customers under supply agreements, we offer scheduled deliveries with reserved stock.
3. Package Selection
The TM1621B is available in SSOP48 and LQFP44 packages. Confirm your PCB design matches the package footprint. If you need a different package variant, consider the TM1621C (SOP28) or TM1621D (QSOP24) — Newfly can source these variants as well. Selecting the wrong package results in costly PCB re-spins and production delays.
4. Quantity Flexibility
Whether you need 100 pieces for prototyping or 50,000 units for mass production, your supplier should accommodate both. Newfly Electronics supports small-quantity orders for engineering samples and bulk orders for production, with tiered pricing that rewards volume. This is especially important for startups and mid-size manufacturers who cannot commit to large minimum orders.
5. Technical Support and Documentation
The TM1621B’s 4-wire serial interface and RAM-mapping architecture require proper initialization sequences and register configuration. A supplier that provides datasheet support and application guidance saves engineering time during product development. Newfly’s technical team can assist with register configuration, LCD glass matching, and interface timing questions — something that generic component brokers cannot offer.
6. Export and Logistics Experience
For overseas buyers, shipping ICs from China involves customs documentation, packaging standards, and delivery timelines. Your supplier should have proven export experience to your destination country. Newfly Electronics regularly ships to India, Vietnam, Thailand, Malaysia, Philippines, Europe, USA, and the Middle East, with experience in customs requirements for each region.
Why Choose Newfly Electronics as Your TM1621B Supplier
Newfly Electronics is a specialized distributor of Titan Micro Electronics IC chips, focused on serving overseas electronics manufacturers. Here is why buyers choose us:
- Direct sourcing from Titan Micro — original TM1621B ICs with full traceability, not gray-market stock or remarked components
- Competitive China supply chain pricing — Titan Micro’s original factory quotes for overseas buyers are often significantly higher than what Newfly offers through distributor pricing. Our supply chain advantage translates directly to your cost savings.
- Stable supply commitment — buffer stock maintained for repeat customers and production contracts, with reserved inventory for long-term supply agreements
- Export experience — shipping to India, Vietnam, Thailand, Malaysia, Philippines, Europe, USA, and Middle East markets with proper customs documentation and tracking
- Technical support — datasheet provision, register configuration guidance, LCD glass matching assistance, and interface timing support
- Flexible MOQ — sample quantities for engineering validation, bulk orders for production, and scheduled deliveries for long-term contracts
- Full Titan Micro portfolio — beyond the TM1621B, Newfly supplies TM1637, TM1640, TM1650, and TM1628 driver ICs. For comparison guides, see our TM1650 vs HT16K33 and TM1628 vs HT1628 articles.
Contact Newfly Electronics today for TM1621B pricing and availability:
- Email: sales@newflyelectronics.com
- WhatsApp: +86 15112635657
Frequently Asked Questions
Where can I buy TM1621B LCD driver ICs?
Newfly Electronics supplies original TM1621B ICs from Titan Micro Electronics. Contact sales@newflyelectronics.com or WhatsApp +86 15112635657 for pricing and stock availability. We ship globally to India, Southeast Asia, Europe, USA, and the Middle East.
Is the TM1621B still in production?
Yes, Titan Micro Electronics continues to manufacture the TM1621B. Newfly Electronics maintains current stock and can fulfill both sample and production orders with short lead times.
What package options are available for the TM1621B?
The TM1621B is available in SSOP48 and LQFP44 packages. For alternative packages, consider the TM1621C (SOP28) or TM1621D (QSOP24) variants. Contact us to confirm package availability for your specific requirement.
Does Newfly Electronics provide the TM1621B datasheet?
Yes, we provide the official Titan Micro TM1621B datasheet to verified customers. The datasheet includes complete electrical characteristics, timing diagrams, register maps, and application circuits. Request it via email or WhatsApp.
What is the TM1621B price?
Pricing depends on order quantity and package type. Newfly Electronics offers competitive distributor pricing — typically lower than Titan Micro’s direct factory quotes for overseas buyers. Contact us for a quote based on your required quantity.
Can the TM1621B replace the HT1621B?
The TM1621B and HT1621B (Holtek) are functionally similar LCD segment drivers with 128-segment capacity, but the TM1621B uses a 4-wire interface while the HT1621B uses a 3-wire interface. Firmware adjustments are needed for migration. The cost savings from TM1621B distributor pricing often justify the engineering effort. A detailed comparison will be available in our upcoming TM1621B vs HT1621B article.
What is the minimum order quantity for TM1621B?
Newfly Electronics offers flexible MOQ. We support sample quantities (as low as 50-100 pieces) for engineering validation and bulk orders (10,000+ units) for mass production. Contact us with your requirement for a tailored quotation.
Request Your TM1621B Quotation Today
If you are manufacturing energy meters, thermostats, measurement instruments, or any product that uses LCD segment displays, the TM1621B from Titan Micro Electronics is a proven, reliable LCD driver IC. Newfly Electronics provides original components, competitive pricing, datasheet support, and global shipping to your manufacturing facility.
Get your TM1621B quotation now:
- Email: sales@newflyelectronics.com
- WhatsApp: +86 15112635657
Request datasheet, pricing, and stock availability. We respond within 24 hours with a detailed quotation tailored to your production requirements. Whether you need 100 pieces for prototyping or 100,000 units for mass production, Newfly Electronics is your reliable TM1621B supplier in China.