Analog Devices Inc./Maxim Integrated MAX6836VXSD3+

Overview

MAX6836VXSD3+ from Maxim Integrated is a push-pull active-high voltage supervisor IC designed to monitor +1.575V supply rails in ultra-low-voltage microprocessor systems. It features a factory-set 1.575V reset threshold (±2.5% over temperature), 210ms reset timeout period, and 7.5µA typical supply current - enabling reliable power-on reset and brownout protection in portable battery-powered equipment.

For engineers reviewing the MAX6836VXSD3+ datasheet, MAX6836VXSD3+ pinout, MAX6836VXSD3+ application, or MAX6836VXSD3+ equivalent, key selection criteria include active-high push-pull RESET output compatibility with µP reset inputs, SC70-4 package footprint constraints, 210ms timeout timing for system initialization sequencing, and guaranteed reset validity down to VCC = 0.75V.

Technical Context

The MAX6836VXSD3+ implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to reject fast VCC transients, and integrates a debounced manual reset input (MR) with internal 20kΩ pullup. Its reset assertion logic triggers when VCC falls below 1.575V or MR is pulled low, holding RESET high for exactly 210ms after recovery.

This device belongs to the MAX6832–MAX6840 family optimized for 1.2V–1.8V core supplies, and uses BiCMOS process technology (681 transistors) to achieve stable operation across -40°C to +85°C while maintaining sub-10µA quiescent current at 1.8V.

Key Specifications

Pinout & Package

MAX6836VXSD3+ is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), compatible with standard reflow profiles and space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6836VXSD3+, the MAX6836VXSD1+ offers faster reset release for time-critical boot paths, while the TPS3123E15DBVR trades MR flexibility and SC70-4 compactness for tighter threshold tolerance and higher production volume availability.

Availability

MAX6836VXSD3+ is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial IoT edge nodes requiring stable component supply with long-term lifecycle support.

Supply support for MAX6836VXSD3+ 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 product line delivers ultra-low-power voltage supervisors targeting battery-operated systems with 1.2V–1.8V core supplies, emphasizing minimal footprint, precise threshold accuracy, and robust transient immunity.

FAQ

What is the exact reset threshold voltage of the MAX6836VXSD3+?

The MAX6836VXSD3+ 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 laser-trimmed during production and applies specifically to the 'V' suffix variant, as confirmed in the Threshold Suffix Guide and Electrical Characteristics table of the MAX6832–MAX6840 datasheet.

Does the MAX6836VXSD3+ require an external pullup resistor on its RESET pin?

No, the MAX6836VXSD3+ does not require an external pullup resistor because it features a push-pull active-high RESET output. The internal driver actively pulls RESET high (≥0.8×VCC) when asserted and low (≤0.2×VCC) when released, eliminating dependency on external biasing components.

What is the function of the MR pin on the MAX6836VXSD3+?

The MR pin on the MAX6836VXSD3+ is an active-low manual reset input with internal 20kΩ pullup to VCC. Pulling MR low forces a reset regardless of VCC level, and reset remains asserted for the full 210ms timeout after MR returns high - enabling hardware-initiated resets without external debounce circuitry.

Can the MAX6836VXSD3+ operate reliably at VCC = 0.75V?

Yes, the MAX6836VXSD3+ guarantees valid RESET output operation down to VCC = 0.75V for active-high assertion. Below this voltage, reset behavior is not specified; however, the device continues to monitor VCC and will assert RESET once VCC rises above 1.575V during power-up sequences.

What timeout period is implemented in the MAX6836VXSD3+?

The MAX6836VXSD3+ implements a 210ms reset active timeout period, corresponding to the 'D3' suffix in its ordering code. This fixed delay begins after VCC rises above 1.575V or MR is released, ensuring sufficient time for system clocks and memory to stabilize before releasing the processor from reset.