0.8-inch Four-Digit Digital Tube Display Module – White
$4.401pcs
The TM1650 chip is a versatile dedicated integrated circuit for LED driving and keyboard scanning control. Its stability and multifunctionality make it an ideal choice for display drivers in household appliance products.
| Dimensions | 81.5 × 26.0 mm |
|---|---|
| Brand |
easyelecmodule |
2645 in stock
Product Introduction
The TM1650 is a high‑performance LED driver and keyboard scanner IC developed by Titan Micro Electronics. It integrates MCU digital interfaces, data latches, LED drivers, key‑scanning circuits, and multi‑level brightness control in a single chip. Capable of directly driving multiple seven‑segment displays or LED arrays while supporting key detection, it offers stable and reliable performance with strong anti‑interference capabilities. Ideal for home appliances, meters, scales, and other applications requiring 24/7 continuous operation, it simplifies peripheral design and enhances overall system stability.
Function of TM1650 Pins
| Pin | Definition |
|---|---|
| VCC | Positive pole |
| GND | Power ground |
| SCL | Serial clock signal pin |
| SDA | Serial data transmission pin |
Pins Description
- The DIG1 to DIG4 pins are used for LED segment driving output and can also serve as keyboard scan outputs.
- The SCL and SDA pins are used for clock input and data input/output, respectively.
- KI1 to KI7 pins serve as both LED segment driving outputs and key scan inputs.
- The DP pin serves as an LED segment output and also functions as a keyboard status indicator output.
- The KP and VDD pins are used for logic ground and logic power supply, respectively.
Matters Need To Attention
When using the chip, it is important to note that static electricity can easily accumulate in dry seasons or environments, and electrostatic discharge (ESD) may damage the integrated circuit. Therefore, it is recommended to take all appropriate precautions during use and soldering to protect the circuit from ESD damage.
Instructions
The TM1650 communicates using a 2-wire serial transmission protocol. It recognizes a start signal (START) and a stop signal (STOP). For the start signal, SCL remains high while SDA transitions from high to low. For the stop signal, SCL remains high while SDA transitions from low to high. Data transmission follows a byte format, with the most significant bit (MSB) sent first and the least significant bit (LSB) sent last.
The chip’s control and display commands are configured through specific data command formats. For example, the command for setting brightness must follow a specific MSB and LSB configuration. When reading key data, the timing requires that data be output from the TM1650’s SDA pin on the falling edge of SCL.
For keyboard scan codes, the TM1650 follows a specific encoding rule. For example, A/KI1 is encoded as 44H, representing the key at the first row and first column. When reading key data, a 2K resistor needs to be connected in series between the DIG and KI pins.
Application Scenarios
The TM1650 is widely used in various devices requiring clear digital display due to its stable driving performance and flexible keyboard scanning capability. In home appliances, it is commonly used for time, temperature, and status displays in microwave ovens, air conditioners, washing machines, and more. In medical devices, it displays measurement data, time, and status prompts in blood pressure monitors, thermometers, and similar equipment. In industrial instruments, it reliably shows voltage, current, temperature, and other measurement parameters. In smart terminals, it is also applied in smart watches, calculators, electronic dictionaries, and other products, providing users with intuitive and stable information output.
Related Information
Shipping Cost
We only ship to the United States. Shipping costs are calculated based on the total order amount.
Shipping Method And Delivery Time
All orders will be processed and shipped within 72 hours of placing the order (excluding weekends and holidays). They will ship from Shenzhen, China, primarily via 4PX logistics. Depending on the destination and logistics conditions, other carriers such as DHL, FedEx, UPS, USPS, etc., may also handle the delivery. Estimated shipping time is 7-12 business days, with actual delivery occurring in 10-17 business days, depending on logistics conditions.
Payment:
We accept Visa, Master card, Maestro, American Express, JCB, Dinner's Club, Discover, Paypal, Apple Pay, Google Pay .
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