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Analog Devices DS1818R-20+T&R — Analog & Data Acquisition
Analog Devices

DS1818R-20+T&R Simple Reset/Power-On Reset, 2.55V Threshold

MPNDS1818R-20+T&R
End of Life

Maxim Integrated DS1818R-20+T&R, EconoReset Simple Reset/Power-On Reset, active-low open-drain output, 2.55V threshold, 100ms min reset timeout, -40°C to 85°C, SOT-23-3.

$3.49Ref. price · indicative, final on quote
DS1818R-20+T&R datasheet
PackagingTO-236-3, SC-59, SOT-23-3
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

DS1818R-20+T&R Technical Specifications
ParameterValue
TypeSimple Reset/Power-On Reset
SeriesEconoReset
Mounting typeSurface Mount
Voltage - threshold2.55V
Number of voltages monitored1
Operating temperature-40°C ~ 85°C (TA)
ResetActive Low
OutputOpen Drain or Open Collector
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeout100ms Minimum
CaseTO-236-3, SC-59, SOT-23-3

Product details

Industrial temperature and package reality

Rated for -40°C to 85°C ambient, this part handles the thermal swings you see in outdoor telecom enclosures, factory automation panels, and automotive cabin modules. The SOT-23-3 package (TO-236-3, SC-59 equivalent) is a three-pin surface-mount footprint that fits into tight layouts alongside passives — no extra board area for a larger SOIC. The single monitored voltage means this is a straightforward rail guard, not a multi-voltage sequencer; you place it on the core or I/O supply and route the reset output to the processor's /RST pin.

Active lifecycle — no LTB pressure

This removes the sourcing risk of a last-time-buy scramble — you can qualify it into a new BOM without worrying about a short procurement window. The part is available through independent distribution, quoted to order against an RFQ with current pricing confirmed at quote time.

Frequently asked questions

Is DS1818R-20+T&R a direct replacement for DS1818R-10+T&R?

Both parts share the same EconoReset family, SOT-23-3 package, active-low open-drain output, and industrial temperature range. The difference is the voltage threshold — DS1818R-20+T&R trips at 2.55V, while DS1818R-10+T&R trips at a different threshold. Verify the threshold matches your monitored rail before substituting.

Is DS1818R-20+T&R active low reset?

Yes, the reset output is active low. When the monitored voltage falls below 2.55V, the open-drain output pulls low. It remains low for the 100ms minimum timeout after the supply recovers above the threshold.