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Analog Devices Inc./Maxim Integrated MAX792MEPE+
- Part No.:
- MAX792MEPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX792MEPE+.pdf
- Description:
- IC SUPERVISOR MPU 16-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:962
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Product details
Overview
MAX792MEPE+ from Maxim Integrated is a microprocessor supervisory circuit providing reset generation, manual reset input, two-stage power-fail warning, watchdog timer with pulse output, and chip-enable gating for nonvolatile memory protection. It features 4.37V internal reset threshold, guaranteed RESET validity down to VCC = 1V, and 200ms reset timeout. Used in embedded controllers and industrial instrumentation requiring reliable power-up/down sequencing.
For engineers reviewing the MAX792MEPE+ datasheet, MAX792MEPE+ pinout, MAX792MEPE+ application, or MAX792MEPE+ equivalent, this page delivers verified specifications, validated pin functions, confirmed alternative parts, and design-meaningful feature interpretations - all grounded in Maxim's official documentation for the MAX792 family and specifically applicable to the MAX792MEPE+ variant.
Technical Context
The MAX792MEPE+ integrates five independent monitoring functions: a reset generator with hysteresis and 200ms delay, a low-line comparator asserting 120mV above the reset threshold, a programmable watchdog timer (default 1.6s, adjustable via SWT capacitor), an overvoltage comparator (OVI/OVO), and a bidirectional CE transmission gate with ≤10ns propagation delay. All comparators reference a precision 1.30V internal bandgap.
It operates in two mutually exclusive modes: internal threshold mode (RESET IN/INT ≤60mV) using factory-trimmed thresholds, or external programming mode (RESET IN/INT ≥600mV) enabling user-defined reset and low-line thresholds via resistor dividers. The device guarantees functional operation down to VCC = 1V on RESET output and supports both 3V and 5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.37V nominal (M-suffix), ±3% accuracy over -40°C to +85°C - sets precise brownout detection point for 5V systems. |
| Reset Timeout Period | 200ms typical after VCC rise - ensures µP completes power stabilization before release from reset. |
| Watchdog Timeout | 1.6s nominal (SWT tied to VCC) - provides sufficient margin for firmware execution loops without false triggers. |
| CE Propagation Delay | ≤10ns max - enables use with high-speed µPs without timing violation on memory access paths. |
| Supply Current | 70µA typical at +25°C - minimizes quiescent load on battery-backed or low-power supply rails. |
| Operating Temperature | -40°C to +85°C (E-grade) - qualified for industrial control and automotive under-hood environments. |
| RESET Validity Range | Guaranteed down to VCC = 1V - ensures deterministic reset assertion during deep brownout or controlled shutdown. |
Pinout & Package
MAX792MEPE+ is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.3-inch body width, through-hole mounting, and RoHS-compliant lead-free finish (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | RESET / RESET | Complementary active-low and active-high reset outputs; RESET sinks 1.6mA at 0.1V, valid to VCC = 1V. |
| 3 | VCC | Main supply input (2.75V to 5.5V); powers all internal circuits and drives CE OUT high state. |
| 4 | RESET IN/INT | Mode select: ≤60mV → internal threshold mode; ≥600mV → external programming mode. |
| 5 | LLIN/REFOUT | In external mode: low-line comparator input; in internal mode: buffered 1.30V reference output. |
| 6 | OVO | Open-drain overvoltage comparator output; pulls low when OVI > 1.30V - uncommitted, no internal effect. |
| 7 | OVI | Inverting input of overvoltage comparator; connect to voltage divider for custom overvoltage trip point. |
| 8 | SWT | Watchdog timeout setting: tie to VCC for 1.6s default; connect capacitor to GND for adjustable timeout (k×C). |
| 9 | MR | Manual reset input; internally pulled up; asserts reset when <1.30V; 25µs minimum pulse width required. |
| 10 | LOW LINE | Active-low NMI output; asserts 120mV above reset threshold - provides early warning before reset. |
| 11 | WDI | Watchdog input; transition resets timer; static high/low > timeout causes WDPO/WDO assertion. |
| 12 | GND | Ground reference for all analog comparators and digital logic; must be low-impedance connection. |
| 13 | CE OUT | Chip-enable output; gated pass-through of CE IN when reset inactive; disabled during reset to block writes. |
| 14 | CE IN | Chip-enable input; connected to µP CE signal; high-impedance during reset to prevent bus contention. |
| 15 | WDO | Watchdog fault output; open-drain, asserts low on timeout; returns high on next WDI transition. |
| 16 | WDPO | Watchdog pulse output; 500µs–6ms low pulse preceding WDO by 70ns - enables hardware shutdown latching. |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail warning | LOW LINE asserts 120mV above reset threshold - gives µP time to execute save routines before reset. |
| Pulsed watchdog output (WDPO) | Generates 500µs–6ms advance warning pulse before WDO - enables single-event latch or dual-fault shutdown. |
| On-board CE gating with 10ns delay | Prevents partial writes to CMOS RAM/EEPROM during brownout by disabling CE path within 15µs of reset assert. |
| Memory write-cycle completion | If CE IN is low when reset asserts, CE OUT stays low for 15µs - ensures ongoing memory write completes. |
| Voltage monitor for overvoltage warning | OVI/OVO comparator operates independently - allows system-level overvoltage detection without affecting reset logic. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Programmable logic controller operating in factory-floor environments with fluctuating 24VDC-derived 5V supplies. IC Role / Device Role / Timing Role: Supervisory circuit providing brownout reset, early low-line NMI, and watchdog-triggered safe shutdown. Use Value: Prevents corrupted I/O state during voltage sags; enables deterministic recovery from software lockup without operator intervention. |
Use Scenario: Portable ultrasound device with battery backup and critical nonvolatile parameter storage. IC Role / Device Role / Timing Role: Power supervisor ensuring EEPROM write integrity during battery switchover and detecting overvoltage from charging circuit. Use Value: Guarantees memory write completion before reset; blocks invalid data writes during power transitions. |
| Telecom Remote Terminal Unit | Automotive Body Control Module |
|
Use Scenario: Outdoor RTU powered by solar-charged battery with wide temperature (-40°C to +85°C) operation. IC Role / Device Role / Timing Role: Reset generator with extended VCC validity (to 1V) and temperature-stable thresholds for reliable cold-start. Use Value: Ensures µP boots correctly even after deep discharge; eliminates need for external reset IC biasing. |
Use Scenario: CAN-connected BCM subjected to load-dump transients and cold-cranking voltage dips. IC Role / Device Role / Timing Role: Dual-threshold supervisor detecting both brownout (reset) and pre-brownout (LOW LINE) conditions. Use Value: Triggers NMI for graceful peripheral shutdown before reset, preserving diagnostic logs across power cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX820MEPE+ | Same pinout and function, but ±2% reset/low-line threshold accuracy vs. ±3% for MAX792MEPE+. | Better suited for systems requiring tighter voltage-margin tolerance, e.g., precision sensor nodes. | Select MAX820MEPE+ only if ±2% accuracy is explicitly required; otherwise MAX792MEPE+ offers cost advantage. |
| TPS3823MPDBVR | Single-output (RESET only), no WDPO, no CE gating, fixed 3.08V threshold, SOT-23-5 package. | Limited to basic reset supervision; lacks NMI warning, memory protection, and watchdog pulse functionality. | Use only for space-constrained designs where full MAX792MEPE+ feature set is unnecessary. |
Compared with MAX820MEPE+, MAX792MEPE+ trades threshold accuracy for lower cost while retaining identical functionality and timing. Against TPS3823MPDBVR, MAX792MEPE+ delivers comprehensive supervision - including dual-threshold warning, memory write protection, and hardware-shutdown-capable watchdog - in a larger but functionally complete DIP package.
Availability
MAX792MEPE+ is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, telecom infrastructure, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX792MEPE+ 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 applications.
The MAX792MEPE+ belongs to Maxim's microprocessor supervisory product line, designed to ensure robust power-on reset, brownout protection, and software fault recovery in mission-critical embedded systems without battery backup.
FAQ
What is the exact reset threshold voltage for MAX792MEPE+?
The MAX792MEPE+ has a nominal reset threshold voltage of 4.37V, corresponding to the 'M' suffix in its part number. This value is factory-trimmed and specified with ±3% accuracy over the full -40°C to +85°C operating temperature range. The threshold is referenced to an internal 1.30V bandgap and remains stable across supply voltage variations from 2.75V to 5.5V.
Does MAX792MEPE+ support watchdog timeout adjustment?
Yes, MAX792MEPE+ supports adjustable watchdog timeout via the SWT pin. With SWT tied to VCC, the default timeout is 1.6 seconds. To adjust, connect a capacitor between SWT and GND: timeout = k × C, where k = 16.2 for VCC = 5V and k = 27 for VCC = 3V, and C is in nanofarads. Capacitor values above 4.7nF are recommended for stable operation.
How does the CE gating function protect memory in MAX792MEPE+?
The MAX792MEPE+ prevents memory corruption by disabling the CE transmission gate during reset assertion. When reset is active, CE IN becomes high-impedance and CE OUT is pulled high, blocking all chip-select signals to attached RAM or EEPROM. If CE IN is low at reset onset, CE OUT remains low for 15µs to allow completion of the current write cycle before isolation.
Can MAX792MEPE+ operate with VCC below 2.75V?
Yes, MAX792MEPE+ guarantees RESET output validity down to VCC = 1V, though the minimum recommended operating voltage is 2.75V. Below 2.75V, internal comparators and logic may not function fully, but the RESET output remains electrically valid and asserted as long as VCC stays above 1V. For operation below 2.75V, external pull-down resistors on RESET are recommended to maintain noise margin.
What is the purpose of the LOW LINE output on MAX792MEPE+?
The LOW LINE output on MAX792MEPE+ is an active-low non-maskable interrupt (NMI) signal that asserts approximately 120mV above the reset threshold voltage. It provides early warning of impending power failure, allowing the microprocessor to execute critical save routines or graceful shutdown sequences before reset is triggered - adding a crucial safety margin in power-sensitive applications.
MAX792MEPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX792MEPE+ FAQ
1.How can I place an order for MAX792MEPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792MEPE+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX792MEPE+ reliable?
The price and inventory of MAX792MEPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792MEPE+ is usually 5 days.
3.What payment methods are accepted for MAX792MEPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792MEPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792MEPE+?
MAX792MEPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792MEPE+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX792MEPE+?
For technical support, including MAX792MEPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792MEPE+ requirements.
6.How does Aetrix verify that MAX792MEPE+ is sourced from the original manufacturer or authorized distributors?
All MAX792MEPE+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX792MEPE+ meets industry standards.
7.What is the process for return or replacement of MAX792MEPE+?
All MAX792MEPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX792MEPE+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX792MEPE+ part is unused and in its original packaging.
Return procedure for MAX792MEPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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