Analog Devices Inc./Maxim Integrated MAX698EPA

Overview

MAX698EPA from Maxim Integrated is an industrial-grade, 8-pin PDIP power-on reset and voltage monitor IC for +5V microprocessor systems. It delivers a guaranteed 140ms RESET pulse on power-up, brownout (assertion at 4.4V, deassertion at 4.65V), and power-down, with ±40mV hysteresis and 5mA supply current. It operates from -40°C to +85°C and requires zero external components.

For engineers reviewing the MAX698EPA datasheet, MAX698EPA pinout, MAX698EPA application, or MAX698EPA equivalent, key selection criteria include its fixed 4.65V reset threshold, open-drain RESET output (0.4V low @ 1.6mA), industrial temperature range, and absence of watchdog functionality-distinguishing it from the MAX699 series.

Technical Context

The MAX698EPA implements a precision bandgap-based voltage comparator with internal hysteresis to detect +5V supply deviations. Its reset timer is monolithic and unadjustable, generating a minimum 140ms active-low pulse upon VCC crossing the 4.4V–4.65V window.

No watchdog circuitry is present-WDI and WDO pins are absent in the 8-pin PDIP configuration. The device uses dual VCC pins (pins 1 & 2) and triple GND pins (pins 3, 4, & 7) for noise immunity and low-impedance grounding in noisy digital environments.

Key Specifications

Pinout & Package

MAX698EPA is housed in an 8-lead plastic dual in-line package (PDIP) with 0.3-inch width, compliant with JEDEC MS-001. Pin 1 is top-left corner (notch side), with pins numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX699EPA, MAX698EPA offers simpler integration without watchdog overhead; versus TPS3808G33DBVR, it provides higher noise immunity via dual VCC/triple GND and fixed +5V optimization-but lacks adjustability and uses larger PDIP packaging.

Availability

MAX698EPA is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and critical μP power monitoring applications requiring stable component supply across industrial temperature ranges.

Supply support for MAX698EPA 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, interface, sensing, and timing applications.

The MAX698/MAX699 product line delivers low-cost, single-chip power-on reset and watchdog supervision for +5V microprocessor systems, targeting cost-sensitive industrial and embedded control designs.

FAQ

What is the reset threshold voltage of the MAX698EPA?

The MAX698EPA asserts RESET when VCC falls below 4.4V and deasserts RESET when VCC rises above 4.65V, providing a fixed 40mV hysteresis window. This threshold is factory-trimmed and guaranteed over the full -40°C to +85°C temperature range. The MAX698EPA does not support external adjustment of this threshold.

Does the MAX698EPA include a watchdog timer function?

No, the MAX698EPA does not include a watchdog timer. Watchdog functionality is exclusive to the MAX699 series (e.g., MAX699EPA), which adds a WDI input and corresponding timeout supervision. The MAX698EPA is a dedicated power-on reset and brownout detector with no WDI or WDO pins in its 8-pin PDIP package.

What is the minimum guaranteed RESET pulse width for the MAX698EPA?

The MAX698EPA guarantees a minimum RESET pulse width of 140ms on power-up, power-down, and during brownout events. This duration is internally generated and fixed-no external components are required or supported to modify the timing. The pulse width remains valid across the full industrial temperature range.

Can the MAX698EPA be used with a 3.3V supply?

No, the MAX698EPA is specified for +5V systems only, with an operating voltage range of 3.0V to 5.5V but a fixed 4.4V/4.65V reset threshold optimized for nominal +5V rails. For 3.3V applications, consider alternatives like the TPS3808G33DBVR, which features a 3.08V threshold and SOT-23-6 packaging.

What package type and lead finish does the MAX698EPA use?

The MAX698EPA is supplied in an 8-lead plastic dual in-line package (PDIP) with 0.3-inch width. It is available in both leaded and lead(Pb)-free versions; the standard MAX698EPA is leaded, while the lead-free variant is designated MAX698EPA+ (with "+" suffix). Both meet RoHS requirements per Maxim's packaging standards.