TLC696x1/TLC696x1-Q1 Constant Current Sink Drivers Texas Instruments TLC696x1/TLC696x1-Q1 16-Channel Constant Current Sink Drivers integrate 16 constant current sinks with SRAM for brightness storage. The device connects by a two-wire serial interface in daisy chain topology and supports up to 1024 devices for 16,000 local dimming zones.