PCA9955BTW - NXP

Description: 16 LED drivers. Each output programmable at:  Off  On  Programmable LED brightness  Programmable group dimming/blinking mixed with individual LED brightness  Programmable LED output delay to reduce EMI and surge currents  Gradation control for all channels  Each channel can assign to one of four gradation control groups  Programmable gradation time and rate for ramp-up and/or ramp-down operations  Programmable step time (6-bit) from 0.5 ms (minimum) to 512 ms (maximum)  Programmable hold