Analog Devices Inc./Maxim Integrated MAX792REPE+

Overview

MAX792REPE+ from Maxim Integrated is a microprocessor supervisory circuit with dual reset outputs (RESET and RESET), 200ms power-up reset timeout, ±2% reset threshold accuracy (4.62V nominal), and integrated watchdog timer with programmable timeout via SWT pin. It monitors VCC for brownout, provides manual reset input (MR), low-line warning (LOW LINE), and chip-enable gating for nonvolatile memory protection in embedded control systems.

For engineers reviewing the MAX792REPE+ datasheet, MAX792REPE+ pinout, MAX792REPE+ application, or MAX792REPE+ equivalent, this page delivers verified functional identity, confirmed 16-pin PDIP package mapping, validated 4.62V internal reset threshold, real-world timing behavior (200ms reset delay, 70ns WDPO-to-WDO propagation), and two field-validated alternative parts with documented parameter-level differences.

Technical Context

The MAX792REPE+ implements independent reset and low-line comparators with factory-trimmed 4.62V reset threshold and 4.74V low-line threshold (120mV above reset), both referenced to an internal 1.30V bandgap. Its watchdog function uses an RC-timed oscillator tied to the SWT pin, delivering nominal 1.6s timeout at VCC = 5V with k = 16.2 scaling factor.

It integrates a bidirectional CE transmission gate with ≤10ns propagation delay and active-low CE OUT that remains latched low for 15µs after reset assertion if CE IN is low-ensuring memory write-cycle completion during power-down. The MR input features internal 1.30V comparator and 12µs propagation delay, eliminating external pull-up requirements.

Key Specifications

Pinout & Package

MAX792REPE+ is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; pins are numbered counter-clockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX792REPE+, MAX706REPA+ omits critical safety features like WDPO and CE gating, while TPS3823MPDBVR removes MR and LOW LINE-making MAX792REPE+ the only option among the three supporting full fault escalation (NMI → reset → hardware shutdown) and memory write-cycle completion.

Availability

MAX792REPE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, telecom remote terminal units, and automotive body control modules requiring stable component supply across commercial temperature ranges.

Supply support for MAX792REPE+ 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 and mixed-signal ICs for industrial, medical, and communications applications, with emphasis on reliability and integration.

The MAX792REPE+ belongs to Maxim's microprocessor supervisory product line, engineered to consolidate reset generation, watchdog supervision, memory protection, and power-fail warning into a single 16-pin IC for space-constrained embedded systems.

FAQ

What is the exact reset threshold voltage for MAX792REPE+?

The MAX792REPE+ has a factory-trimmed nominal reset threshold voltage of 4.62V with ±2% accuracy over temperature. This value is fixed for the 'R' suffix variant and applies in internal threshold mode when RESET IN/INT is grounded. The threshold remains valid down to VCC = 1V, ensuring robust operation during deep brownout conditions.

Does MAX792REPE+ support external reset threshold programming?

Yes, MAX792REPE+ supports external reset threshold programming via the RESET IN/INT and LLIN/REFOUT pins. When RESET IN/INT is pulled to ≥600mV, the device enters external mode and uses an external resistor divider to set both reset and low-line thresholds. The internal 4.62V threshold is disabled in this configuration.

How does the watchdog timeout period work on MAX792REPE+?

The MAX792REPE+ watchdog timeout defaults to 1.6s when SWT is tied to VCC. To adjust it, connect a capacitor from SWT to GND: timeout = k × C_SWT, where k = 16.2 for VCC = 5V and k = 27 for VCC = 3V. The capacitor must exceed 4.7nF; values below cause undefined behavior. WDPO pulses first, followed 70ns later by WDO assertion.

What is the purpose of the CE IN and CE OUT pins on MAX792REPE+?

The CE IN and CE OUT pins implement a transmission gate that blocks chip-enable signals to nonvolatile memory during brownout. When reset is asserted, CE OUT is forced high-impedance or pulled up, preventing spurious writes. If CE IN is low at reset assertion, CE OUT stays low for 15µs to complete the current memory write cycle-critical for EEPROM/CMOS RAM integrity.

Can MAX792REPE+ generate a non-maskable interrupt (NMI)?

Yes, MAX792REPE+ generates a low-line warning on the LOW LINE pin, which is designed specifically to drive a µP's NMI input. In internal threshold mode, LOW LINE asserts 120mV above the 4.62V reset threshold (i.e., at ~4.74V) with 15mV hysteresis-providing advance warning before reset occurs, enabling graceful software shutdown.