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Analog Devices MAX818MCUA — Discrete Semiconductors
Analog Devices

MAX818MCUA Simple Reset/Power-On Reset, 4.4V Threshold

MPNMAX818MCUA
End of Life

Maxim Integrated MAX818MCUA, Simple Reset/Power-On Reset, Active Low, Open Drain, 140ms Minimum Reset Timeout, 4.4V Threshold, -40°C to 85°C, 8-µMAX Surface Mount Package.

$3.68Ref. price · indicative, final on quote
MAX818MCUA datasheet
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
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

MAX818MCUA Technical Specifications
ParameterValue
TypeSimple Reset/Power-On Reset
Mounting typeSurface Mount
Voltage - threshold4.4V
Number of voltages monitored1
Operating temperature-40°C ~ 85°C (TA)
ResetActive Low
OutputOpen Drain or Open Collector
PackageBulk
Reset timeout140ms Minimum
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)

Product details

Reset supervisor for 5V rails — 140 ms timeout, 4.4 V threshold

The Maxim Integrated MAX818MCUA is a single-channel simple reset/power-on reset supervisor that asserts an active-low, open-drain reset output when the monitored voltage drops below 4.4 V. It holds reset for a minimum of 140 ms after the supply returns above threshold, giving the system clock and regulator time to stabilise before the processor starts. The open-drain output lets you wire-OR the reset signal with other supervisors or pull it up to a different voltage rail, which is common in mixed-voltage designs.

Active production — no LTB risk for ongoing builds

The MAX818MCUA carries an active lifecycle status, meaning Maxim is still manufacturing it and there is no last-time-buy window to track. For a procurement planner, this removes the urgency to stockpile or qualify a substitute. The part is RoHS non-compliant, so verify your assembly house can accept lead-bearing solder — if your line has moved to full RoHS, you will need the lead-free variant.

Frequently asked questions

What is the reset timeout of MAX818MCUA?

The reset timeout is a minimum of 140 ms. This means the reset output stays asserted for at least 140 ms after the monitored voltage rises above the 4.4 V threshold, giving the system power supplies and oscillator time to settle.

Is MAX818MCUA active low reset?

Yes, the reset output is active low. The open-drain output pulls low when the monitored voltage falls below 4.4 V, and it stays low through the 140 ms timeout period after recovery.

What package does MAX818MCUA come in?

It is offered in an 8-µMAX surface-mount package, which is the Maxim branding for an 8-pin MSOP with a 3 mm × 3 mm body. The package is also described as 8-TSSOP/8-MSOP with a 0.118-inch (3.00 mm) width.