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STMicroelectronics STM6519AHARUB6F — Discrete Semiconductors

STMicroelectronics STM6519AHARUB6F Smart Reset Timer, 6-UDFN

MPNSTM6519AHARUB6F
End of Life

STMicroelectronics Smart Reset™ series, STM6519AHARUB6F, Reset Timer, Active Low, Open Drain or Open Collector output, Adjustable/Selectable Reset Timeout, Surface Mount, 6-UFDFN, -40°C to 85°C.

$1.2Ref. price · indicative, final on quote
STMicroelectronics STM6519AHARUB6F datasheet (PDF)
Packaging6-UFDFN
RoHSROHS3 Compliant
SeriesSmart Reset™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM6519AHARUB6F specifications
ParameterValue
TypeReset Timer
SeriesSmart Reset™
MountingSurface Mount
Operating temperature-40°C ~ 85°C (TA)
ResetActive Low
OutputOpen Drain or Open Collector
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeoutAdjustable/Selectable
Case6-UFDFN

Product details

Smart Reset supervisor with adjustable timeout

The STM6519AHARUB6F is a Reset Timer from STMicroelectronics' Smart Reset™ series, designed to supervise system reset timing with an adjustable/selectable timeout period. It asserts a reset signal (active low) via an open-drain or open-collector output, giving the system designer flexibility to tailor the reset pulse width to match the downstream processor or FPGA requirements. This is not a simple fixed-delay reset generator; the timeout is configurable, so one BOM line can serve multiple reset timing needs across a product family by changing a single external component. Housed in a 6-UDFN package (1.45x1 mm body), it is a surface-mount part suited for space-constrained PCBs in industrial control, telecom, and embedded systems where a clean, adjustable reset sequence is needed.

The adjustable/selectable reset timeout lets you set the reset pulse width via an external timing component. The open-drain output allows the reset line to be shared with other reset sources or level-shifted via an external pull-up resistor.

Frequently asked questions

Is STM6519AHARUB6F active or obsolete?

It is Active in production with no end-of-life notice. ROHS3 compliant.

What are alternatives to STM6519AHARUB6F?

The STM1061N29WX6F is a simpler reset supervisor with a fixed 30 µs propagation delay and open-drain output, but it lacks the adjustable timeout feature. The STM809TWX6F and STM706M6F offer fixed 140 ms minimum reset timeout but use push-pull outputs. None are direct pin-compatible drop-ins; the choice depends on whether you need the adjustable timeout and open-drain flexibility.

How does the adjustable reset timeout work on STM6519AHARUB6F?

The reset timeout is adjustable/selectable via an external timing component (capacitor or resistor). The exact range and formula are in the datasheet; the key point is that one supervisor IC can be configured for different reset pulse widths by changing that external component.