Analog Devices Inc./Maxim Integrated MAX6836VXSD0+T

Overview

MAX6836VXSD0+T from Maxim Integrated is a push-pull active-high µP reset circuit in SC70-4 package, monitoring +1.575V supply with ±2.5% threshold accuracy over temperature, 7.5µA typical supply current, and 1.5ms reset timeout period. It provides reliable power-on/power-down reset assertion for low-voltage microprocessor systems operating down to VCC = 0.75V.

For engineers reviewing the MAX6836VXSD0+T datasheet, MAX6836VXSD0+T pinout, MAX6836VXSD0+T application, or MAX6836VXSD0+T equivalent, key selection criteria include active-high reset output compatibility, manual reset debouncing capability, guaranteed reset validity at VCC ≥ 0.75V, and SC70-4 footprint constraints in space-constrained portable designs.

Technical Context

The MAX6836VXSD0+T implements a precision voltage comparator with internal 444mV reference, comparing VCC against factory-set 1.575V threshold (suffix 'V'). Its reset logic asserts active-high RESET when VCC falls below threshold or MR is pulled low, holding asserted for 1.5ms after recovery.

It features a debounced manual reset input (MR) with 20kΩ internal pullup, 2µs minimum pulse width requirement, and immunity to <100ns glitches. The push-pull output drives high to VCC with VOH ≥ 0.8×VCC at ISOURCE = 50µA and sinks low to ≤0.2×VCC at ISINK = 80µA.

Key Specifications

Pinout & Package

MAX6836VXSD0+T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for ultra-compact PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6836VXSD0+T, MAX6381XR22D3+T requires external biasing and offers different timing/sensitivity, while TPS3123E15DBVR trades compactness and ultra-low current for longer reset hold time and simpler sourcing.

Availability

MAX6836VXSD0+T is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial edge node controllers requiring stable component supply with lead-free compliance and tape-and-reel delivery.

Supply support for MAX6836VXSD0+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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and interface applications.

The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage µP supervision in battery-powered systems, emphasizing sub-10µA quiescent current, SC70 packaging, and precise reset thresholds for 1.2V–1.8V supply rails.

FAQ

What is the reset threshold voltage of the MAX6836VXSD0+T?

The MAX6836VXSD0+T has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is defined by the 'V' suffix in the part number and is optimized for monitoring 1.6V nominal core supplies. The threshold is internally generated using a precision 444mV reference and resistive divider, eliminating external component dependencies. MAX6836VXSD0+T maintains this accuracy across its specified operating VCC range of 0.75V to 3.6V.

Does the MAX6836VXSD0+T support manual reset functionality?

Yes, the MAX6836VXSD0+T 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 without external components. The device rejects glitches shorter than 100ns and requires a minimum 2µs low pulse width. Reset remains asserted for the full 1.5ms timeout period after MR returns high. MAX6836VXSD0+T's MR input is fully compatible with CMOS logic levels and open-drain drivers.

What is the operating voltage range for valid reset assertion in the MAX6836VXSD0+T?

The MAX6836VXSD0+T guarantees valid reset assertion down to VCC = 0.75V for its active-high output. Below this voltage, the push-pull driver cannot maintain guaranteed VOH or VOL specifications. The device continues to operate functionally (comparator active, MR responsive) down to VCC = 0.55V, but reset output behavior is not characterized below 0.75V. This 0.75V lower limit ensures deterministic µP reset during deep brownout events common in battery-discharge profiles. MAX6836VXSD0+T's specification explicitly defines this boundary in its Electrical Characteristics table.

How does the MAX6836VXSD0+T differ from the MAX6835VXSD0+T?

The MAX6836VXSD0+T and MAX6835VXSD0+T share identical package (SC70-4), threshold (1.575V), timeout (1.5ms), and supply current (7.5µA), but differ in reset output polarity and configuration. MAX6836VXSD0+T provides push-pull active-high RESET, while MAX6835VXSD0+T provides push-pull active-low RESET. Both include debounced MR inputs. This polarity difference dictates interface requirements: MAX6836VXSD0+T drives high to VCC when reset is asserted, directly compatible with µPs requiring active-high reset signals, whereas MAX6835VXSD0+T pulls low. MAX6836VXSD0+T is selected when system architecture mandates active-high assertion.

Is the MAX6836VXSD0+T RoHS compliant and what packaging format is supplied?

Yes, the MAX6836VXSD0+T is RoHS compliant, indicated by the '+' suffix in the part number per Maxim Integrated's packaging nomenclature. It is supplied exclusively in tape-and-reel format, with standard versions available in 2.5k-unit increments. The device uses lead-free terminations and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) requirements. All units are 100% production tested at +25°C, with over-temperature limits guaranteed by design. MAX6836VXSD0+T's SC70-4 package dimensions (2.0mm × 2.1mm) and land pattern conform to Maxim's published package outline documents.