Voltage monitoring with 125°C headroom
The TPS3805H33QDCKREP is a 2-channel multi-voltage supervisor from Texas Instruments that monitors two supply rails with a 3.05V fixed threshold on one channel and an adjustable threshold on the second. The active-low reset output is push-pull, meaning it sources and sinks current without requiring an external pull-up resistor — a cleaner signal for the downstream reset line. The 5 µs typical propagation delay means the reset asserts quickly on a brownout — fast enough to hold a Cortex-M4 or similar MCU in reset before the core voltage drops below the retention threshold.
Housed in a 5-lead SC-70-5 (SOT-353) package, the TPS3805H33QDCKREP occupies roughly 2 mm × 2.1 mm of board area. The 0.65 mm pin pitch is layout-friendly — two-layer boards route the supply, ground, and two sense inputs without via congestion. The supplier device package is SC-70-5. Surface-mount assembly with Tape & Reel packaging (Cut Tape option available). The small footprint makes it a candidate for space-constrained designs like sensor nodes, handheld instruments, or multi-rail FPGA boards where the supervisor sits close to the monitored rail.
ROHS3 compliant per the manufacturer's declaration. The base product number TPS3805 covers the family; the H33 suffix denotes the 3.05V threshold variant.