In general, a latching relay's drive circuit is slightly more complex than that of a classic ... The current flows into the ULN2003 open-drain output and latches the relay to its set or reset position ...

SAMSUNG 11nm Flip-Chip IO library with dynamically switchable 1.8V/3.3V GPIO with fail-safe capability, 5V I2C / SMBUS open-drain cell, 5V OTP cell, 1.8V & 3.3V analog cells, and associated ESD. A key ...