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Analog Devices MAX821UUS-T — DC-DC Power Modules

MAX821UUS-T Simple Reset/Power-On Reset, 2.78V Threshold

MPNMAX821UUS-T
End of Life

Maxim Integrated MAX821UUS-T, Simple Reset/Power-On Reset, Active Low, Push-Pull Output, 2.78V Threshold, Adjustable/Selectable Timeout, -40°C to 125°C, SOT-143-4.

$1.49Ref. price · indicative, final on quote
Analog Devices MAX821UUS-T datasheet (PDF)
PackagingTO-253-4, TO-253AA
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

MAX821UUS-T specifications
ParameterValue
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold2.78V
Number of voltages monitored1
Operating temperature-40°C ~ 125°C (TA)
ResetActive Low
OutputPush-Pull, Totem Pole
PackageBulk
Reset timeoutAdjustable/Selectable
CaseTO-253-4, TO-253AA

Product details

2.78V threshold supervisor in SOT-143-4

The Maxim Integrated MAX821UUS-T is a simple reset/power-on reset IC that monitors a single voltage rail and asserts an active-low reset when the supply drops below 2.78V. The reset output is push-pull, totem-pole, so no external pull-up resistor is needed. The reset timeout is adjustable or selectable via an external capacitor, giving the designer control over the power-up delay.

RoHS non-compliant — verify your assembly line

If your assembly process requires lead-free solder and RoHS-consistent materials, the MAX821UUS-T will not pass incoming inspection. Check whether your contract manufacturer can accommodate a tin-lead finish, or look for a RoHS-compliant variant in the same family.

Frequently asked questions

What is the exact voltage threshold of MAX821UUS-T?

Design engineers need to confirm the reset voltage matches their power supply specification to avoid system misbehavior.

Is MAX821UUS-T active and not obsolete?

Buyers must ensure long-term availability for production runs and avoid future supply issues.

What is the reset timeout range for MAX821UUS-T?

The adjustable timeout affects startup timing, important for systems with specific power-up sequencing requirements.

What is the pinout of MAX821UUS-T?

PCB layout and integration depend on correct pin mapping, especially for SOT-143-4 package.

Where can I buy MAX821UUS-T and what is the price?

Sourcing buyers need immediate stock and pricing to fill BOM lines and manage procurement.

What are equivalent alternatives to MAX821UUS-T?

Engineers and buyers seek cross-reference parts for cost reduction, dual sourcing, or when the primary part is unavailable.