TM1638 SMD IC SOP28 Titan Micro Electronics TM1638

Product Overview:

A surface-mount, dedicated LED display driver and control integrated circuit equipped with an integrated keyboard scanning interface. Fabricated using a high-performance power CMOS process, it integrates a microcontroller digital interface, data latches, high-voltage LED drivers, and a key-scan matrix circuit on a single chip, making it highly optimized for multi-segment display panels in consumer household appliances.

Core Specifications:

Manufacturer: TITAN MICRO ELECTRONICS (TianMicro)

Package Type: SOP-28

Function: LED Driver Control Circuit with Key Scanning

Input Channels: 3 Key-Scan Matrix inputs (K1 through K3) supporting up to an 8 by 3-bit (24 total keys) keyboard configuration.

Control Interface: 3-Wire Serial Interface consisting of Clock (CLK), Strobe (STB), and Data Input/Output (DIO) lines.

Features

• Flexible Large-Scale Display Modes: Configurable to drive a 10-segment by 8-bit or multi-grid LED display arrangement.

• Integrated Brightness Adjustment: Features an internal luminance tuning circuit supporting 8 distinct duty-cycle levels for software display dimming.

• Stable Internal Oscillator: Utilizes a built-in RC oscillator running at a nominal 450 kHz with a stable plus/minus 5% tolerance.

• Automatic Initialization Safeguard: Includes an onboard power-on reset circuit to cleanly initialize data latches during system startup.

• Low Current Logic Interface: Features high noise immunity inputs with hysteresis and low input leakage limits of plus/minus 1 microampere.

• High-Voltage Drive Output: Engineered to supply high-current sink and source paths required to light large multi-digit LED blocks efficiently.

Applications

• Refrigerator Control Panels: Manages temperature multi-segment digital readouts and user command buttons.

• Air Conditioner Displays: Drives localized status screen indicator segments and console panel key arrays.

• Home Theater Systems: Commands multi-character functional timers and volume metric level display structures.

• Smart Kitchen Appliances: Powers electronic oven timers, induction cooker control menus, and digital counter indicators.