Analog Devices Inc./Maxim Integrated MAX16125WTDA00+T

Overview

MAX16125WTDA00+T from Maxim Integrated is a dual pushbutton controller IC with single-supply voltage monitoring, featuring one manual reset input (MR), one active-low open-drain RESET output, and one soft-reset output (SRESET) mirroring MR. It operates from 1.6V to 5.5V, consumes only 5µA quiescent current at 3V, and provides factory-trimmed 2.93V VCC reset threshold with ±2.5% accuracy over -40°C to +125°C for use in portable medical and consumer power management.

For engineers reviewing the MAX16125WTDA00+T datasheet, MAX16125WTDA00+T pinout, MAX16125WTDA00+T application, or MAX16125WTDA00+T equivalent, key selection criteria include its 13s manual reset setup delay (SEL = GND), 7.2ms reset timeout period, guaranteed RESET validity down to VCC = 0.95V, and 0.86mm × 1.25mm 6-bump WLP package compatibility with space-constrained handheld designs.

Technical Context

The MAX16125WTDA00+T implements a precision internal comparator for VCC monitoring with fixed 2.93V threshold (suffix "29"), a deglitch block adding 20ms debounce on MR input, and a programmable setup delay circuit where SEL = GND selects 13s tSU per Table 1a. Its SRESET output replicates MR state with 200ns propagation delay (tMRD), while RESET asserts low for exactly 7.2ms (suffix "D") after valid MR hold.

It uses BiCMOS process technology, supports open-drain RESET output requiring external pullup, guarantees functional operation at VCC ≥ 0.95V, and includes immunity to falling VCC transients ≤10µs when overdrive exceeds 0.15V - critical for battery-powered systems experiencing supply noise during button press events.

Key Specifications

Pinout & Package

MAX16125WTDA00+T is housed in a 0.86mm × 1.25mm, 6-bump wafer-level package (WLP) with bottom-side solder bumps. Pin functions are defined by bump position (A1–C2) and match the MAX16124/MAX16125 configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pushbutton supervisor applications.

Compared with MAX16125WTDB29+T, the MAX16125WTDA00+T provides 4.3× longer manual reset setup delay for enhanced accidental-press protection; versus TPS3123QDBVRQ1, it delivers SRESET mirroring and WLP size critical for consumer portables, though without automotive qualification.

Availability

MAX16125WTDA00+T is available at Aetrix Electronics and suitable for glucose monitors, smartphones, eBook readers, and portable instrumentation requiring stable component supply across extended temperature ranges and ultra-low power consumption.

Supply support for MAX16125WTDA00+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer markets.

The MAX16122–MAX16125 family targets space- and power-constrained portable electronics needing reliable, low-current pushbutton supervision with factory-configured voltage thresholds and timing.

FAQ

What is the exact reset threshold voltage of MAX16125WTDA00+T and how is it trimmed?

The MAX16125WTDA00+T has a factory-trimmed VCC reset threshold of 2.93V (±2.5%) - specified in Table 3 of the datasheet with suffix "29". This value is laser-trimmed during production to ensure accuracy across -40°C to +125°C, eliminating need for external resistive dividers in 3.3V systems. The MAX16125WTDA00+T achieves this using an internal bandgap reference and comparator architecture calibrated at final test.

How does the 13-second manual reset setup delay work on MAX16125WTDA00+T?

The 13-second setup delay (tSU) on MAX16125WTDA00+T is activated by connecting the SEL pin to GND, per Table 1a (suffix "A"). This configures an internal oscillator-based timer that requires MR to remain low for the full 13s before pulsing RESET for 7.2ms. The delay is not software-configurable and is immune to supply noise due to on-chip filtering - a hardware-enforced safety feature against accidental resets.

Can MAX16125WTDA00+T drive a microcontroller reset pin directly without external components?

Yes, MAX16125WTDA00+T can drive most microcontroller reset pins directly: its open-drain RESET output sinks up to 10mA with VOL ≤ 0.4V (at VCC ≥ 2.5V), compatible with standard 1.8V–5V logic. An external pullup resistor (typically 10kΩ–100kΩ to VCC) is required. No level-shifter or additional debounce circuitry is needed - the 20ms hardware deglitch and 13s setup delay are fully integrated.

What is the purpose of the SRESET output on MAX16125WTDA00+T and how does it differ from RESET?

The SRESET output on MAX16125WTDA00+T is a debounced, real-time mirror of the MR input - it goes low when MR is pulled low (after 20ms deglitch) and high when MR is released, with 200ns propagation delay (tMRD). Unlike RESET, SRESET has no timeout and is not asserted during VCC brownout. It enables UI feedback (e.g., LED blink) or auxiliary subsystem control independent of the main processor reset sequence.

Is MAX16125WTDA00+T qualified for automotive applications and what package does it use?

MAX16125WTDA00+T is specified for -40°C to +125°C operation and packaged in a 0.86mm × 1.25mm, 6-bump WLP (W61F0+1), but it is not AEC-Q200 qualified. It targets industrial portable and medical devices (e.g., glucose monitors) requiring extended temperature range and ultra-small footprint. For automotive use, consider pin-compatible alternatives like TPS3123QDBVRQ1, which carries AEC-Q100 certification but lacks SRESET and long-delay capability.