Analog Devices Inc./Maxim Integrated MAX6836HXSD3+

Overview

MAX6836HXSD3+ from Maxim Integrated is a push-pull active-high µP reset circuit in SC70-4 package, designed to monitor +1.313V supply rails with ±2.5% threshold accuracy over temperature and assert reset for 210ms after VCC recovery or MR release. It features debounced manual reset input (MR), 7.5µA typical supply current, and guaranteed RESET validity down to VCC = 0.75V - used in portable microcontroller power supervision.

For engineers reviewing the MAX6836HXSD3+ datasheet, MAX6836HXSD3+ pinout, MAX6836HXSD3+ application, or MAX6836HXSD3+ equivalent, key selection criteria include reset threshold (1.313V), timeout period (210ms), active-high push-pull output, MR debounce capability, and SC70-4 footprint compatibility with low-voltage embedded systems.

Technical Context

The MAX6836HXSD3+ implements a precision voltage comparator with internal 1.313V reference and hysteresis of 0.75% of VTH, enabling reliable brownout detection on 1.2V–1.8V supplies. Its reset logic includes fixed 210ms timeout after VCC rise above threshold or MR deassertion.

It integrates a 20kΩ internal pullup on MR, supports CMOS-level MR drive, and guarantees reset assertion during VCC transients as short as 100ns with >10mV overdrive. The push-pull RESET output sources ≥50µA at 0.8×VCC when asserted and sinks ≥80µA when deasserted.

Key Specifications

Pinout & Package

MAX6836HXSD3+ is housed in a 4-pin SC70 package (2.0mm × 2.1mm, 0.65mm pitch) with gull-wing leads, RoHS-compliant lead-free finish (+ suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar µP reset applications.

Compared with MAX6836HXSD3+, the MAX6836HXSD1+ offers quicker reset release for latency-sensitive boot paths, while MAX6836HXSD4+ extends hold time for systems with slow-start regulators or configurable logic - all share identical 1.313V threshold, SC70-4 package, and MR debounce functionality.

Availability

MAX6836HXSD3+ is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, automotive body electronics, and battery-powered IoT endpoints requiring stable component supply across long production lifecycles.

Supply support for MAX6836HXSD3+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and interface applications.

The MAX6832–MAX6840 family delivers ultra-low-voltage reset supervision for 1.2V–1.8V digital systems, targeting space-constrained, battery-operated equipment where precision threshold accuracy and minimal quiescent current are critical.

FAQ

What is the exact reset threshold voltage of MAX6836HXSD3+ and how is it specified?

The MAX6836HXSD3+ has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is defined in the Threshold Suffix Guide where "H" corresponds to 1.313V, and is confirmed in the Electrical Characteristics table under VTH for MAX6833/MAX6836/MAX6839. The threshold remains stable due to internal bandgap reference and hysteresis of 0.75% of VTH.

Does MAX6836HXSD3+ support manual reset, and how is it implemented?

Yes, MAX6836HXSD3+ includes a debounced manual reset input (MR) on Pin 3. It features an internal 20kΩ pullup resistor to VCC, allowing direct connection of a normally open momentary switch to ground. The MR input accepts CMOS logic levels and rejects glitches <100ns, eliminating need for external filtering. Reset remains asserted while MR is low and for the full 210ms timeout after MR returns high.

What is the function of the RESET output on MAX6836HXSD3+, and what load can it drive?

The RESET output on MAX6836HXSD3+ is a push-pull active-high signal (Pin 2). When asserted, it drives HIGH with VOH ≥ 0.8×VCC at ISOURCE = 50µA; when deasserted, it pulls LOW with VOL ≤ 0.2×VCC at ISINK = 80µA. It requires no external pullup and directly interfaces with standard CMOS reset inputs. Drive capability is sufficient for fanout of ≥10 74LVC gates at 1.3V.

Can MAX6836HXSD3+ operate reliably during severe VCC transients?

Yes, MAX6836HXSD3+ is immune to short negative-going VCC transients down to 100ns duration when overdrive exceeds 10mV below the 1.313V threshold. Its reset comparator ignores fast glitches, as verified in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Overdrive". A 0.1µF bypass capacitor placed near the VCC pin further enhances immunity per application guidance.

What is the minimum VCC voltage at which MAX6836HXSD3+ guarantees valid RESET output?

MAX6836HXSD3+ guarantees valid RESET output down to VCC = 0.75V for active-high operation. Below this, the push-pull driver may not maintain VOH specification. This is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables. For operation below 0.75V, a 100kΩ pullup to VCC is recommended to ensure predictable logic level.