16-channel constant-current sink at 40 mA per channel
The STMicroelectronics STP16CPPS05TTR is a linear LED driver IC built around a 16-bit shift register with constant-current sink outputs. Each of the 16 channels delivers up to 40 mA, set by an external resistor, and the output stage handles up to 20 V — enough headroom for multiple series LEDs in a string. The shift register clocks at 30 MHz, which supports PWM dimming or data updates across a multiplexed display without visible flicker.
The wide range means it holds its current accuracy through a cold start in outdoor signage and through the heat soak near an engine bay or LED headlamp assembly.
No official replacement or second-source alternate is recorded in the STP16CPPS05TTR's lifecycle documentation; the part is the standard offering in its family.