Analog Devices Inc./Maxim Integrated MAX698CWE+T

Overview

MAX698CWE+T from Maxim Integrated is a low-cost, single-supply +5V power-on reset and brownout monitor IC with 140ms minimum reset pulse width, 4.65V reset threshold (typ), 40mV hysteresis, and open-drain RESET output - used in microprocessor systems requiring reliable power-up initialization without external components.

For engineers reviewing the MAX698CWE+T datasheet, MAX698CWE+T pinout, MAX698CWE+T application, or MAX698CWE+T equivalent, key selection criteria include its C-grade temperature range (0°C to +70°C), 16-pin wide SO package, absence of watchdog functionality, and compatibility with +5V digital systems requiring precise voltage monitoring and guaranteed reset timing.

Technical Context

The MAX698CWE+T implements an internal precision bandgap reference and comparator-based voltage monitor that asserts RESET when VCC drops below 4.4V (min) and deasserts at 4.65V (typ), delivering hysteresis to prevent chatter during brownout recovery. It requires no external timing capacitors or pull-up resistors for basic operation.

Unlike the MAX699 variant, the MAX698CWE+T omits watchdog circuitry and WDI/WDO pins; its 16-pin SO package provides non-inverted RESET (pin 15) and inverted RESET (pin 16), both open-drain outputs rated for 1.6mA sink current at ≤0.4V drop.

Key Specifications

Pinout & Package

MAX698CWE+T is housed in a 16-pin wide SOIC (0.3in body width), RoHS-compliant, lead(Pb)-free package (indicated by "+T" suffix). Pin 1 is located at top-left corner with notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-on reset monitoring applications.

Compared with MAX698CPA+T and TPS3808G33DBVR, the MAX698CWE+T uniquely delivers dual-polarity open-drain RESET outputs in a surface-mount 16-pin SO package optimized for +5V systems requiring robust, self-timed power-on initialization without external components.

Availability

MAX698CWE+T is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and critical μP power monitoring applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for MAX698CWE+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.

The MAX698 product line delivers cost-optimized, single-chip power-on reset and brownout supervisors targeting commercial-grade microprocessor systems requiring guaranteed reset timing and minimal external components.

FAQ

What is the reset threshold voltage of the MAX698CWE+T?

The MAX698CWE+T asserts RESET when VCC falls below 4.4V (minimum) and deasserts at 4.65V (typical), with 40mV hysteresis. This threshold is internally trimmed and does not require external adjustment. The MAX698CWE+T maintains this behavior across its full 0°C to +70°C operating range and 3.0V to 5.5V supply range.

Does the MAX698CWE+T include a watchdog timer function?

No, the MAX698CWE+T does not include a watchdog timer. That feature is exclusive to the MAX699 family. The MAX698CWE+T is a dedicated power-on reset and brownout monitor with dual-polarity RESET outputs. Its pinout omits WDI and WDO terminals entirely, confirming the absence of watchdog circuitry in the MAX698CWE+T.

What are the output configurations available on the MAX698CWE+T?

The MAX698CWE+T provides two open-drain RESET outputs: pin 15 (active-low) and pin 16 (active-high), both capable of sinking 1.6mA at ≤0.4V. Neither output is internally pulled up; external pull-up resistors must be used. This dual-output architecture allows direct interface to both active-low and active-high reset inputs on different microprocessors or peripherals within the same system.

Can the MAX698CWE+T operate from a 3.3V supply?

Yes, the MAX698CWE+T operates over 3.0V to 5.5V, making it compatible with 3.3V systems. However, its reset threshold remains fixed at ~4.65V (typ), so it will assert RESET whenever VCC drops below that level - meaning it cannot supervise a 3.3V rail directly. It is intended for +5V monitoring; for 3.3V supervision, a dedicated 3.3V reset IC like the MAX6326 should be used instead of the MAX698CWE+T.

Is the MAX698CWE+T pin-compatible with the MAX699CWE+T?

No, the MAX698CWE+T is not pin-compatible with the MAX699CWE+T. Although both use the same 16-pin wide SO package, the MAX699CWE+T repurposes pins 11 (WDI) and 14 (WDO), while the MAX698CWE+T assigns those pins as N.C. Swapping them without board revision would leave WDI/WDO unconnected or shorted, disabling watchdog functionality or causing undefined behavior - the MAX698CWE+T and MAX699CWE+T require separate PCB layouts.