Analog Devices Inc./Maxim Integrated MAX792MCSE

Overview

MAX792MCSE from Maxim Integrated is a microprocessor supervisory circuit with integrated watchdog timer, dual reset outputs (RESET and RESET), and chip-enable gating logic for nonvolatile memory protection. It features 4.37V factory-programmed reset threshold, 200ms reset timeout, and guaranteed RESET validity down to VCC = 1V. Used in embedded controllers and industrial instrumentation for reliable power-up/power-down sequencing and brownout recovery.

For engineers reviewing the MAX792MCSE datasheet, MAX792MCSE pinout, MAX792MCSE application, or MAX792MCSE equivalent, this page delivers verified functional identity, exact pin roles, real-world timing behavior, memory write-cycle completion support, and validated alternative options for critical µP monitoring designs.

Technical Context

The MAX792MCSE implements independent reset generation via internal voltage comparators with ±2% threshold accuracy in external programming mode and fixed 4.37V threshold in internal mode. Its watchdog function uses an adjustable timeout (1.6s nominal, capacitor-tunable) with dual outputs: WDPO provides advance warning pulse (1.7ms min), while WDO asserts hardware shutdown on timeout.

It integrates a bidirectional CE transmission gate (10ns max propagation delay) that disables during reset to prevent memory corruption, and includes overvoltage detection (OVI/OVO) and low-line warning (LOW LINE) with 120mV offset above reset threshold. All functions operate across 2.75V–5.5V supply range with 70µA typical quiescent current.

Key Specifications

Pinout & Package

MAX792MCSE is housed in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 3.9mm width, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX820MCSE, the MAX792MCSE offers identical functionality but with relaxed accuracy specs-sufficient for industrial control where ±2% is verified only in external programming mode. Versus TPS3823MPDBVR, MAX792MCSE adds critical reliability layers: dual reset polarity, early NMI warning, and memory-write-safe CE gating-justifying its use in mission-critical embedded systems.

Availability

MAX792MCSE is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom base station modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX792MCSE 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX792MCSE belongs to Maxim's microprocessor supervisory product line, designed specifically for robust power monitoring, watchdog supervision, and nonvolatile memory protection in embedded systems operating under harsh electrical conditions.

FAQ

What is the exact reset threshold voltage for MAX792MCSE?

The MAX792MCSE has a factory-programmed reset threshold of 4.37V nominal, corresponding to the 'M' suffix in the part number. This value is specified with typical accuracy in internal threshold mode and ±2% accuracy when used in external programming mode with resistor dividers. The threshold remains stable across the full operating temperature range of 0°C to +70°C.

Does MAX792MCSE support both active-high and active-low reset outputs?

Yes, the MAX792MCSE provides complementary reset outputs: pin 1 is RESET (active-low) and pin 2 is RESET (active-high). Both outputs are asserted simultaneously during power-up, brownout, or manual reset events. RESET sinks up to 1.6mA at 0.1V, while RESET sources up to 1.6mA at VCC − 1.5V, enabling direct interface with diverse µP reset input requirements.

How does the watchdog function work in MAX792MCSE?

The MAX792MCSE watchdog monitors the WDI pin (pin 11) for transitions. If no edge occurs within the timeout period (1.6s nominal, set by SWT capacitor), WDPO pulses low for ≥1.7ms, followed 70ns later by WDO going low. WDO remains low until the next WDI transition. This dual-output structure allows early fault detection (WDPO) and definitive shutdown signaling (WDO) in safety-critical applications.

Can MAX792MCSE protect CMOS RAM during power failure?

Yes, the MAX792MCSE includes dedicated chip-enable gating logic. When reset is asserted, the CE transmission gate disables the path from CE IN (pin 14) to CE OUT (pin 13), preventing spurious memory writes. If CE IN is low when reset activates, CE OUT stays low for 15µs to complete the ongoing write cycle-ensuring data integrity in SRAM, EEPROM, or flash memory during undervoltage events.

What is the purpose of the LOW LINE output on MAX792MCSE?

The LOW LINE output (pin 10) is an active-low signal that asserts when VCC falls to 120mV above the reset threshold (i.e., 4.49V for MAX792MCSE). It serves as a non-maskable interrupt (NMI) to the µP, enabling early warning and graceful system response-such as saving volatile data or disabling peripherals-before the full reset sequence begins. This feature is critical for systems requiring deterministic shutdown behavior.