TM(Shenzhen Titan Micro Elec) TM1814

TM1814 is a four-channel LED constant-current adjustable driver IC with built-in synchronization control. It allows an MCU to input constant-current and PWM configuration data to the TM1814 to achieve a wide variety of display effects. When the signal input is disconnected, it automatically switches to a synchronized fixed multi-color pattern sequence, preventing downstream cascaded ICs from becoming non-functional due to chip failure. The IC integrates an MCU firmware program, single-wire digital interface, data latches, and LED constant-current driver circuitry. The VDD pin incorporates an internal 5V Zener diode, minimizing the number of external components. Suitable for LED decorative products such as guardrail tubes and point light sources.

• Power CMOS process
• OUT port withstand voltage: 32V
• VDD built-in 5V Zener diode; supports 6~24V with series resistor
• Constant current output: 64-level adjustable (6.5mA—38mA)
• PWM brightness control: 256-level adjustable
• Accurate current output (channel-to-channel) max error: ±3%; (chip-to-chip) max error: ±5%
• Single-wire serial cascade interface
• Oscillation mode: built-in RC oscillator with clock synchronization based on data line signals; after receiving its own unit data, automatically regenerates subsequent data and forwards it to the next stage via data output — no signal distortion or attenuation across cascade distance
• Built-in power-on reset circuit; all registers initialized to zero after power-on reset
• External control mode data transfer rate: 800KHz
• Internal control mode data transfer rate: 500KHz
• Internal control mode chip transmission data: 2048 points
• Package: SOP8

• Guard rail tubes
• LED decorative products such as point light sources