DMX to Addressable LED Controller Chip – IS3751

Description The IS3751 is a DMX512-to-addressable-LED protocol converter chip. It operates fully autonomously, requiring no microcontroller or processor, thereby reducing engineering costs and accelerating the product’s time-to-market. It can control up to 170 3‑color or 128 4-color addressable LEDs at a refresh rate of 40 Hz. An RS485 receiver or transceiver converts the DMX differential signaling to TTL-compatible levels for the IS3751, which then directly generates data stream for the addressable LEDs. The chip includes a pin for selecting between 3-color and 4-color addressable LEDs, and a blinking indicator pin to show when a DMX signal is present. The device operates at 3.3 V, with 5 V-tolerant open‑collector LEDs control pin and with 5 V-tolerant RX pin for DMX input, allowing compatibility with both 3.3 V and 5 V RS485 receivers or transceivers. Using 3-color addressable LED: When controlling 3‑color addressable LED, the chip groups every 3 DMX channels into one LED. For example, channel 1, 2 and 3 control the colors of the first LED; channels 4, 5 and 6 control the second LED, and so on, up to LED 170.  Using 4-color addressable LED: When controlling 4‑color addressable LED, the chip groups every four DMX channels into one LED. For example, channels 1, 2, 3 and 4 control the 4 colors of the first LED; channels 5, 6, 7 and 8 control the second LED, and so on, up to LED 128. How to Use The IS3751 is very easy and straightforward to use and does not require an external microcontroller:  Place an RS485 receiver or transceiver between the DMX connector and the IS3751 RX pin.  Add a pull-up resistor of 500 Ω to 5 V on IS3751 LEDS pin, and connect this pin to the addressable LEDs.  Connect the TYPE pin to GND for 3‑color LEDs, or to 3.3 V for 4‑color LEDs.  Ready. Once powered, the IS3751 automatically starts converting DMX data to addressable LED data. Applications Custom Lighting LED Strips, Panels and Bars Floodlights and Wall Washers Building Facades, Bridges and Monuments Interior Design Lighting Water Fountains Museum Lighting Stage and Entertainment Lighting Digital Art Installations Animatronics OEM / Device Manufacturers Benefits Autonomous operation, no need of microcontroller Reduces engineering time and costs Reduces product time-to-market Provides a low-cost solution Compact, easy-to-solder SO8N package