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Analog Devices Inc./Maxim Integrated MAX792TCPE+
- Part No.:
- MAX792TCPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX792TCPE+.pdf
- Description:
- IC SUPERVISOR MPU 16-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:823
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Product details
Overview
MAX792TCPE+ from Maxim Integrated is a microprocessor supervisory circuit providing reset generation, manual reset input, two-stage power-fail warning, watchdog timer with pulsed output, and chip-enable gating for nonvolatile memory protection. It features 4.62V internal reset threshold, guaranteed RESET validity down to VCC = 1V, and 200ms reset timeout - used in embedded controllers and industrial instrumentation requiring reliable brownout detection and memory write-cycle completion.
For engineers reviewing the MAX792TCPE+ datasheet, MAX792TCPE+ pinout, MAX792TCPE+ application, or MAX792TCPE+ equivalent, key selection criteria include its 4.62V reset threshold accuracy, 1.6s default watchdog timeout, 10ns CE propagation delay, and dual active-high/active-low reset outputs for µP interface compatibility.
Technical Context
The MAX792TCPE+ integrates independent reset, low-line (NMI), watchdog, overvoltage, and chip-enable gating functions within a single 16-pin PDIP package. Its reset comparator guarantees operation down to VCC = 1V, while the low-line comparator asserts 120mV above the reset threshold with 15mV hysteresis - enabling early power-fail warning before reset activation.
It supports both internal threshold mode (factory-set 4.62V reset) and external programming mode via resistor divider on RESET IN/INT and LLIN/REFOUT pins. The watchdog function uses SWT pin capacitance to scale timeout (k = 16.2 at VCC = 5V), and WDPO provides 1.7ms advance pulse preceding WDO assertion by 70ns for hardware shutdown sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.62V nominal; factory-trimmed for ±2% accuracy in internal mode - ensures precise brownout detection at regulated supply rails. |
| Reset Timeout Period | 200ms typical after VCC rise or MR release - meets JEDEC JESD78 requirements for µP power-up stabilization. |
| Watchdog Timeout (default) | 1.6s nominal with SWT tied to VCC - provides sufficient margin for firmware execution loops without false triggers. |
| CE Propagation Delay | 10ns maximum - enables use with high-speed µPs (e.g., ARM Cortex-M4/M7) without timing violation during memory access. |
| RESET Output Validity | Guaranteed down to VCC = 1V - supports fail-safe reset assertion even during deep brownout or battery-depleted conditions. |
| Supply Current | 150µA typical at +25°C, VCC = 5V - enables integration into low-power industrial sensors without significant system current penalty. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control applications including PLC I/O modules and test equipment. |
Pinout & Package
MAX792TCPE+ is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin pitch is 0.1 inch; lead finish is lead-free (RoHS-compliant) as indicated by the '+' suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | RESET / RESET | Complementary active-low and active-high reset outputs - allows direct interface to µP reset inputs requiring either polarity. |
| 3 | VCC | Main supply input (2.75V–5.5V); powers all internal comparators, timers, and transmission gates. |
| 4 | RESET IN/INT | Mode select: ≤60mV → internal threshold mode; ≥600mV → external programming mode using resistor divider. |
| 5 | LLIN/REFOUT | In internal mode: 1.30V reference output; in external mode: low-line comparator input - enables flexible NMI threshold setting. |
| 6 | OVO | Open-drain overvoltage comparator output - signals when OVI exceeds 1.30V; uncommitted, no effect on other functions. |
| 7 | OVI | Inverting input to overvoltage comparator - used with external voltage divider to detect supply overvoltage events. |
| 8 | SWT | Set Watchdog Timeout input - capacitor to GND selects timeout period; tied to VCC for 1.6s default. |
| 9 | MR | Manual-reset input with internal 1.30V comparator and pull-up - accepts pushbutton or logic-level assertion without external components. |
| 10 | LOW LINE | Active-low low-line output - asserts 120mV above reset threshold to provide NMI prior to reset for graceful shutdown. |
| 11 | WDI | Watchdog input - transition resets internal timer; static high/low >1.6s triggers WDPO/WDO assertion. |
| 12 | GND | Ground reference for all analog and digital circuitry - must be low-impedance connection to system ground plane. |
| 13 | CE OUT | Chip-enable output - gated version of CE IN, disabled during reset to prevent memory corruption during brownout. |
| 14 | CE IN | Chip-enable input - passes through transmission gate to CE OUT only when reset is deasserted. |
| 15 | WDO | Watchdog output - open-drain, asserts low on timeout; returns high on next WDI transition - used for fault signaling or reset latching. |
| 16 | WDPO | Watchdog-pulse output - 1.7ms low pulse preceding WDO by 70ns - enables edge-triggered hardware shutdown sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail warning | LOW LINE asserts 120mV above reset threshold with 15mV hysteresis - delivers deterministic NMI timing for controlled µP shutdown before reset. |
| Memory write-cycle completion | CE OUT remains low for 15µs after reset assertion if CE IN was low - ensures RAM/EEPROM write operations complete before power collapse. |
| Pulsed watchdog output (WDPO) | 1.7ms advance pulse preceding WDO by 70ns - enables synchronous hardware latch (e.g., D flip-flop) for two-fault shutdown without software intervention. |
| On-board chip-enable gating | 10ns max CE propagation delay with automatic disable during reset - prevents spurious memory writes during undervoltage conditions. |
| Voltage monitor for overvoltage warning | OVI/OVO pair forms standalone 1.30V threshold comparator - detects overvoltage independently of reset or watchdog logic. |
Applications
| Industrial PLC I/O Modules | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Monitoring 5V regulated supply in programmable logic controller backplane modules subject to transient load drops and ESD-induced brownouts. IC Role / Device Role / Timing Role: Supervisory IC generating synchronized RESET and LOW LINE signals to halt CPU execution and trigger ADC data freeze before voltage collapse. Use Value: Prevents corrupted I/O register states and invalid sensor readings during undervoltage events, meeting IEC 61000-4-2/4-4 immunity requirements. | Use Scenario: Power supervision in portable ultrasound imaging units with lithium-ion battery backup and 3.3V/5V dual-rail systems. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting LOW LINE at 3.42V (120mV above 3.3V reset) to initiate image buffer flush before 3.3V reset at 3.3V. Use Value: Ensures lossless capture of last valid frame before shutdown, satisfying FDA 21 CFR Part 11 data integrity mandates. |
| Automotive Body Control Modules | Test & Measurement Instruments |
Use Scenario: Brownout protection in 12V-to-5V converted ECUs exposed to load-dump transients and cold-crank voltage sags. IC Role / Device Role / Timing Role: Reset generator with 4.62V threshold and 200ms timeout - holds microcontroller in reset until post-crank supply stabilizes. Use Value: Eliminates erratic CAN bus behavior and EEPROM corruption during engine start cycles per ISO 7637-2 Pulse 4 compliance. | Use Scenario: Power monitoring in benchtop oscilloscopes requiring deterministic reset sequencing across FPGA, ADC, and display subsystems. IC Role / Device Role / Timing Role: Centralized supervisor coordinating RESET, LOW LINE, and CE gating to align power-up of mixed-voltage domains. Use Value: Guarantees known initialization state across 1.2V core, 3.3V I/O, and 5V analog sections - reduces boot failure rate to <1ppm. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX692ACPE+ | Same 16-pin PDIP package; 4.65V reset threshold; no WDPO output; 200ms reset timeout; lacks CE gating. | Supports basic reset + manual reset + watchdog, but cannot implement two-fault hardware shutdown or memory write completion. | Select when advanced watchdog pulse sequencing or chip-enable protection is not required - lower cost, simpler layout. |
| TPS3823MPWPT | 16-pin TSSOP package; 4.63V reset threshold; 200ms timeout; includes watchdog but no WDPO or CE gating; higher quiescent current (30µA vs. 150µA). | Designed for space-constrained PCBs; lacks LOW LINE/NMI output and memory write-cycle hold functionality. | Select for compact surface-mount designs where NMI signaling and write-cycle completion are secondary priorities. |
Compared with MAX692ACPE+ and TPS3823MPWPT, the MAX792TCPE+ uniquely combines 4.62V precision reset, LOW LINE NMI output, WDPO advance pulse, and CE gating - making it the only option supporting full hardware-based two-fault shutdown and memory write integrity in through-hole commercial-grade systems.
Availability
MAX792TCPE+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical diagnostic equipment, automotive body control modules, and test & measurement instruments requiring stable component supply across extended production lifecycles.
Supply support for MAX792TCPE+ 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 MAX792TCPE+ belongs to Maxim's microprocessor supervisory product line, designed specifically for robust power-monitoring and memory-protection in mission-critical embedded systems operating under variable supply conditions.
FAQ
What is the reset threshold voltage of the MAX792TCPE+?
The MAX792TCPE+ has a nominal reset threshold voltage of 4.62V in internal threshold mode, with ±2% accuracy over temperature and supply variations. This value is factory-trimmed and specified in the ordering table as the 'T' suffix variant. The device guarantees valid RESET output down to VCC = 1V, ensuring fail-safe operation during deep brownout conditions.
How does the MAX792TCPE+ support memory write-cycle completion?
The MAX792TCPE+ supports memory write-cycle completion via its chip-enable (CE) gating architecture. When reset is asserted and CE IN is low, CE OUT remains low for 15µs to allow ongoing RAM or EEPROM write operations to complete before power collapse. This behavior is implemented in hardware and requires no firmware intervention, directly preventing data corruption during undervoltage events.
Can the MAX792TCPE+ be used with a 3.3V microprocessor system?
Yes, the MAX792TCPE+ supports 3.3V systems through external programming mode. By configuring RESET IN/INT and LLIN/REFOUT with an external resistor divider, users can set custom reset thresholds (e.g., 3.06V or 2.91V variants exist). The device operates from VCC = 2.75V to 5.5V, and its RESET output remains valid down to VCC = 1V - enabling reliable supervision even in low-voltage embedded applications.
What is the purpose of the WDPO pin on the MAX792TCPE+?
The WDPO (Watchdog-Pulse Output) pin on the MAX792TCPE+ provides a 1.7ms low pulse that precedes WDO assertion by 70ns. This advance signal enables edge-triggered hardware shutdown sequencing - for example, clocking a D flip-flop to latch system reset only after two consecutive watchdog timeouts. WDPO is essential for implementing fail-safe, software-independent fault recovery in safety-critical systems.
Does the MAX792TCPE+ require external components for basic reset functionality?
No, the MAX792TCPE+ requires no external components for basic reset functionality in internal threshold mode. With RESET IN/INT tied to GND, it uses factory-set 4.62V reset and 4.74V low-line thresholds. Only optional features - such as external threshold programming, adjustable watchdog timeout (capacitor on SWT), or overvoltage detection (resistor divider on OVI) - require external passive components.
MAX792TCPE+ 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:
- -
MAX792TCPE+ FAQ
1.How can I place an order for MAX792TCPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792TCPE+ 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 MAX792TCPE+ reliable?
The price and inventory of MAX792TCPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792TCPE+ is usually 5 days.
3.What payment methods are accepted for MAX792TCPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792TCPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792TCPE+?
MAX792TCPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792TCPE+ 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 MAX792TCPE+?
For technical support, including MAX792TCPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792TCPE+ requirements.
6.How does Aetrix verify that MAX792TCPE+ is sourced from the original manufacturer or authorized distributors?
All MAX792TCPE+ 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 MAX792TCPE+ meets industry standards.
7.What is the process for return or replacement of MAX792TCPE+?
All MAX792TCPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX792TCPE+, 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 MAX792TCPE+ part is unused and in its original packaging.
Return procedure for MAX792TCPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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