Analog Devices Inc./Maxim Integrated MAX16074RS19D2+

Overview

MAX16074RS19D2+ from Maxim Integrated is an ultra-low-power, open-drain active-low microprocessor supervisory circuit in a 1mm × 1mm UCSP package. It monitors supply voltages from 1.8V to 3.6V with a factory-trimmed 1.90V reset threshold (±2.5% over temperature), 34ms reset timeout, 0.7μA supply current, and guaranteed reset assertion down to VCC = 1.0V - used for reliable power-on reset and brownout detection in portable battery-powered systems.

For engineers reviewing the MAX16074RS19D2+ datasheet, MAX16074RS19D2+ pinout, MAX16074RS19D2+ application, or MAX16074RS19D2+ equivalent, key selection criteria include open-drain output compatibility with bidirectional µP reset pins, immunity to sub-100ns VCC transients, manual reset input with internal 50kΩ pullup, and operation across –40°C to +85°C industrial temperature range.

Technical Context

The MAX16074RS19D2+ implements a precision band-gap reference and comparator with internally trimmed resistors to set its 1.90V detection threshold. Its open-drain RESET output interfaces directly with µPs having bidirectional reset pins using a single external pullup resistor, enabling either device to assert reset.

It features dual timing paths: a fixed 34ms reset timeout after VCC rises above threshold or MR release, and a 20µs–90µs VCC-to-RESET propagation delay depending on overdrive voltage. The MR input includes glitch rejection (100ns) and supports TTL/CMOS logic levels without external debouncing.

Key Specifications

Pinout & Package

MAX16074RS19D2+ uses a 4-bump, 1mm × 1mm chip-scale package (UCSP™) with bottom-side bumps. The package is RoHS-compliant and lead-free ("+" suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6381XR29D2+ and TPS3123E19DBVR, the MAX16074RS19D2+ uniquely combines ultra-small UCSP packaging, open-drain output for bidirectional reset sharing, and sub-1μA supply current - making it optimal for space- and power-constrained portable designs where MR control and reset flexibility are essential.

Availability

MAX16074RS19D2+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, cell phones, and digital cameras requiring stable component supply and long-term lifecycle support.

Supply support for MAX16074RS19D2+ 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, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.

The MAX1607x family delivers nanoPower supervisory functions in chip-scale packaging - engineered specifically for battery-critical portable electronics where size, current, and reset flexibility are non-negotiable.

FAQ

What is the reset threshold voltage of the MAX16074RS19D2+?

The MAX16074RS19D2+ has a factory-trimmed reset threshold of 1.90V, specified with ±2.5% accuracy over the full –40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "19" suffix variant. The MAX16074RS19D2+ uses this precise threshold to monitor 1.8V–3.6V system supplies and assert reset during brownout conditions.

Does the MAX16074RS19D2+ require an external pullup resistor on the RESET pin?

Yes, the MAX16074RS19D2+ features an open-drain RESET output and requires an external pullup resistor to VCC or another logic rail. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. This architecture enables direct connection to bidirectional µP reset pins - a capability not supported by push-pull alternatives. The MAX16074RS19D2+ itself does not provide internal pullup on RESET.

What is the function of the MR pin on the MAX16074RS19D2+?

The MR (Manual Reset) pin on the MAX16074RS19D2+ is an active-low input that forces reset assertion when pulled low. It includes an internal 50kΩ pullup resistor to VCC, allowing it to be left unconnected if unused. When MR is driven low, RESET goes active immediately (within 1–2µs), and remains active for the full 34ms timeout after MR returns high. This feature enables hardware-initiated resets in the MAX16074RS19D2+ without requiring µP intervention.

Can the MAX16074RS19D2+ operate with supply voltages below 1.8V?

Yes, the MAX16074RS19D2+ operates from 1.2V to 5.5V and guarantees valid reset assertion down to VCC = 1.0V - well below its 1.8V–3.6V nominal monitoring range. While the 1.90V threshold is optimized for 1.8V+ systems, the device continues to function as a reset generator during deep brownout. However, the detector's accuracy degrades below 1.2V, and the MAX16074RS19D2+ is not characterized for threshold performance below that point.

What package type and dimensions does the MAX16074RS19D2+ use?

The MAX16074RS19D2+ uses a 4-bump, 1mm × 1mm chip-scale package (UCSP™) with bottom-side solder bumps. Its outline number is R41C1-1 (package code R41), and it complies with RoHS standards ("+" suffix). This ultra-compact package enables placement in tight spaces such as smartphone SIM card trays or wearable sensor modules - a key differentiator versus SOT-23 or SC70 alternatives. The MAX16074RS19D2+ footprint requires no perimeter clearance, only bump-to-bump spacing per Maxim's land pattern guidelines.