LM2903L-Q1

The TL331L-Q1 (single) and LM2903L-Q1 (dual) are high voltage self-latching comparators with a open-collector output. The family also offers low input offset voltage and fault-tolerant inputs. These devices have an excellent speed-to-power combination with a propagation delay of 300ns with a quiescent supply current of only 300µA per channel.

The unique feature of the family is the output latching capability. The output latches upon the first high-to-low threshold crossing, allowing capture of an event or error condition without the full attention of a system controller. This allows events to be captured at start up while the system controller is still initializing or busy with other tasks. When the Latch input is held low, the "Transparent" mode is entered and the output continues to reflect the input conditions (latching disabled).

These comparators also feature fault-tolerant inputs that can go up to 36V without damage with no output phase inversion. This makes this family of comparators designed for precision voltage monitoring in harsh, noisy environments.

The open-drain outputs can be pulled-up below or beyond the supply voltage for OR’ing multiple outputs or level translation.

The family is specified for the Automotive temperature range of -40°C to +125°C and are available in standard leaded and leadless packages.