The SS340RT/SS440R sensor ICs are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. They are designed to respond to a single pole: North (SS340RT) or South (SS440R). These unipolar Hall ICs are supplied in three different magnetic sensitivities to meet a wide range of potential applications: ? SS341RT and SS441R offer the highest sensitivity, with a typical operating point of 75 G at 25 ?C [77 ?F]. ? SS343RT and SS443R offer medium sensitivity, with a typical operating point of 135 G at 25 ?C [77 ?F]. ? SS349RT and SS449R offer the lowest sensitivity, with a typical operating point of 305 G at 25 ?C [77 ?F].

The ULN2003LV is a low-voltage and low power 1? 7-Channel High Current Sink Drivers upgrade of TI?s popular ULN2003 family of 7-channel ? Supports up to 8V Ouput Pullup Voltage Darlington transistor array. The ULN2003LV sink ? Supports a Wide Range of 3V-to-5V Relay and driver features 7 low output impedance drivers to Inductive Coils support low voltage relay and inductive coil applications. The low impedance drivers minimize on- ? Low Output VOL of 0.4V (Typical) With chip power dissipation; up to 5 times lower for typical ? 100mA (Typical) Current Sink per Channel at 3V relays. The ULN2003LV driver is pin-to-pin 3.3V Logic Input(1) compatible with ULN2003 family of devices in similar ? 140mA (Typical) Current Sink per Channel at packages