Voltage monitor with 1.4 V threshold and 619 ms reset hold
The TPS3899DL14DSER is a single-channel voltage supervisor (Type Monitor) from Texas Instruments, monitoring a 1.4 V threshold rail. It asserts an active-low, open-drain reset output when the monitored voltage drops below the threshold, and holds reset for 619 ms typical after the rail recovers. The 619 ms reset timeout gives downstream ICs (MCUs, FPGAs, SoCs) enough time to stabilize before the system releases from reset — critical for reliable power-up sequencing in battery-powered or noise-sensitive designs.
Industrial temperature range and nanopower operation
The nanopower architecture keeps quiescent current low, making it a fit for always-on battery-powered systems where every microamp counts.
6-WSON package and surface-mount assembly
Housed in a 6-WSON (1.5x1.5) package, the device requires a small PCB footprint — the 0.50 mm pitch and exposed pad demand careful solder-paste stencil design and a thermal pad on the PCB for heat sinking.