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Analog Devices Inc./Maxim Integrated MAX792SCSE
- Part No.:
- MAX792SCSE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX792SCSE.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
MAX792SCSE from Maxim Integrated is a microprocessor supervisory circuit providing reset generation, manual reset input, two-stage power-fail warning (low-line detection 120mV above reset threshold), watchdog timeout monitoring, and chip-enable signal gating for nonvolatile memory protection. It operates over 2.75V–5.5V supply, guarantees RESET validity down to VCC = 1V, and features 200ms reset timeout with ±2% reset threshold accuracy in external programming mode. Used in embedded controllers and critical µP power monitoring systems.
For engineers reviewing the MAX792SCSE datasheet, MAX792SCSE pinout, MAX792SCSE application, or MAX792SCSE equivalent, this page delivers verified functional identity, confirmed 16-pin narrow SO package mapping, validated 16-pin terminal roles per official pin description, exact reset/wdog/CE timing values, and two manufacturer-confirmed alternative parts with documented technical and application differences.
Technical Context
The MAX792SCSE implements dual comparator-based supervision: one for reset assertion (with hysteresis) and another for low-line warning, both configurable via internal reference (1.30V) or external resistor divider. Its watchdog timer uses an RC-controlled timeout (default 1.6s at VCC = 5V, k = 16.2) with independent WDPO pulse output preceding WDO by 70ns.
Chip-enable gating employs a transmission gate with ≤10ns propagation delay and 15µs hold time on CE OUT during reset assertion to ensure memory write-cycle completion. Reset active timeout is fixed at 200ms typ, and RESET remains valid down to VCC = 1V via internal design - not dependent on external pull-downs for basic functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.91V nominal (S-suffix), ±2% accuracy in external programming mode - sets precise brownout detection point |
| Low-Line Threshold Offset | 120mV above reset threshold - provides advance NMI warning before reset assertion |
| Watchdog Timeout Period | 1.6s nominal (SWT tied to VCC), adjustable via capacitor on SWT pin - enables flexible software fault detection window |
| Reset Active Timeout | 200ms typical - ensures stable µP initialization after power-up or brownout recovery |
| Chip-Enable Propagation Delay | 10ns max - supports high-speed µP bus timing without CE skew |
| Supply Current | 70µA typical at +25°C, VCC = 5V - enables low-power system supervision |
| Operating Voltage Range | 2.75V to 5.5V - compatible with 3.3V and 5V logic domains |
Pinout & Package
MAX792SCSE is housed in a 16-pin narrow SO (Small Outline) package, 3.9mm width, 1.27mm pitch, RoHS-compliant lead-free option available with '+' suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | RESET / RESET | Complementary active-low and active-high reset outputs; RESET guaranteed valid down to VCC = 1V |
| 3 | VCC | Main supply input (2.75V–5.5V); powers all internal comparators, timers, and gates |
| 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, 7 | OVO / OVI | Uncommitted overvoltage comparator output/input; OVI threshold = 1.30V, no effect on other functions |
| 8 | SWT | Set Watchdog Timeout input; capacitor-to-GND selects timeout period (k = 16.2 @ 5V) |
| 9 | MR | Manual-reset input; internally pulled up, 1.30V threshold, 25µs min pulse width |
| 10 | LOW LINE | Active-low low-line warning output; asserts 120mV above reset threshold in internal mode |
| 11 | WDI | Watchdog input; transition resets timer; no activity > timeout → WDPO/WDO assert |
| 12 | GND | Ground reference for all analog and digital circuitry |
| 13 | CE OUT | Chip-enable output; gated pass-through of CE IN when reset inactive; holds low 15µs on reset assert |
| 14 | CE IN | Chip-enable input; high-impedance during reset; enables memory write-cycle completion |
| 15, 16 | WDO / WDPO | Watchdog fault output (latched) and watchdog pulse output (500µs–6ms pulse, precedes WDO by 70ns) |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail warning | Independent low-line comparator asserts 120mV above reset threshold - enables NMI-triggered graceful shutdown before reset |
| Pulsed watchdog output (WDPO) | 500µs–6ms pulse precedes WDO by 70ns - allows external flip-flop latching for two-fault hardware shutdown |
| Memory write-cycle completion | CE OUT holds low 15µs after reset assertion if CE IN was low - prevents RAM corruption during power-down |
| On-board chip-enable gating | ≤10ns CE IN→CE OUT propagation delay - preserves µP bus timing integrity while adding supervision |
| Voltage monitor for overvoltage warning | OVI/OVO uncommitted comparator with 1.30V threshold - adds system-level overvoltage detection without affecting core supervision |
Applications
| Industrial PLC Controller Power Monitoring | Medical Device Microcontroller Supervision |
|---|---|
Use Scenario: Continuous operation of programmable logic controllers in factory automation where undetected brownout could cause unsafe actuator states. IC Role / Device Role / Timing Role: MAX792SCSE provides synchronized reset, low-line NMI, and watchdog monitoring - ensuring deterministic µP restart and fault logging before voltage collapse. Use Value: 200ms reset timeout and 120mV low-line offset enable 15–30ms advance warning for controlled I/O freeze, preventing spurious relay switching. | Use Scenario: Battery-backed patient monitors requiring fail-safe µP reset and memory write protection during AC power interruption. IC Role / Device Role / Timing Role: MAX792SCSE gates CE signals to preserve SRAM contents during brownout and asserts RESET only after VCC stabilizes above 2.91V. Use Value: Chip-enable hold time (15µs) and 10ns CE propagation delay ensure full write-cycle completion even during rapid 3.3V rail collapse. |
| Telecom Base Station Management Unit | Automotive Infotainment Head Unit |
Use Scenario: Remote telecom equipment operating on PoE or DC-DC converters where input ripple may trigger false resets. IC Role / Device Role / Timing Role: MAX792SCSE uses external resistor programming to set precise 2.91V reset and 3.03V low-line thresholds - rejecting transient dips under 10ms. Use Value: ±2% threshold accuracy in external mode eliminates need for margin-based design, reducing BOM cost vs. generic supervisors. | Use Scenario: Automotive infotainment systems subject to load-dump and cold-crank conditions requiring robust power sequencing. IC Role / Device Role / Timing Role: MAX792SCSE monitors 5V domain with manual reset button interface (MR) and watchdog on UART TX line - detecting firmware hangs during CAN communication loss. Use Value: WDPO pulse triggers external latch for hard reset only after two consecutive faults - avoiding nuisance reboots during brief CAN bus glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SCSE | Single reset output (no RESET), no low-line comparator, no WDPO, 200ms fixed timeout, same 2.91V threshold | Lacks two-stage warning and pulse-based watchdog latching - suitable only for basic reset-only systems | Select when system requires only power-on reset and manual reset, with no NMI or hardware shutdown capability |
| TPS3823-29DBVR | Single reset output, no CE gating, no WDPO, 200ms timeout, 2.93V threshold, push-pull output (vs. open-drain) | No memory protection gating or low-line warning - designed for simple µP reset, not memory-critical applications | Select for cost-sensitive consumer electronics where CE signal integrity and write-cycle completion are not required |
Compared with MAX792SCSE, MAX706SCSE omits low-line warning and WDPO latching - reducing fault response granularity; TPS3823-29DBVR lacks CE gating entirely, making it unsuitable for systems requiring guaranteed memory write completion during brownout.
Availability
MAX792SCSE is available at Aetrix Electronics and suitable for industrial PLC controller power monitoring, medical device microcontroller supervision, and telecom base station management units requiring stable component supply across extended temperature ranges (0°C to +70°C).
Supply support for MAX792SCSE 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, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX792SCSE belongs to Maxim's microprocessor supervisory product line, engineered specifically for systems requiring coordinated reset, memory write protection, and multi-level power-fail warning in space-constrained embedded designs.
FAQ
What is the exact reset threshold voltage for MAX792SCSE?
The MAX792SCSE has a nominal reset threshold voltage of 2.91V, corresponding to the 'S' suffix in its part number. This value is factory-trimmed and specified with ±2% accuracy in external programming mode. In internal threshold mode, the device uses the same 2.91V setting but with standard tolerance per datasheet Electrical Characteristics table.
Does MAX792SCSE support both internal and external reset threshold programming?
Yes, MAX792SCSE supports both modes. Pulling RESET IN/INT ≤60mV selects internal threshold mode (2.91V fixed). Pulling it ≥600mV enables external programming mode, allowing custom reset and low-line thresholds using a resistor divider network connected to LLIN/REFOUT and RESET IN/INT pins.
How does the chip-enable gating function work in MAX792SCSE?
The MAX792SCSE gates CE signals via an internal transmission gate between CE IN and CE OUT. During normal operation, CE transitions pass through with ≤10ns delay. When reset is asserted, the gate disables and CE OUT holds low for 15µs if CE IN was low - ensuring memory write-cycle completion before power collapse.
What is the purpose of the WDPO pin on MAX792SCSE?
The WDPO (Watchdog Pulse Output) pin on MAX792SCSE delivers a 500µs–6ms low pulse immediately before WDO assertion, with 70ns precedence. This enables external D-flip-flop latching to implement two-consecutive-fault hardware shutdown - a safety-critical feature absent in basic watchdog ICs.
Can MAX792SCSE operate reliably below 2.75V supply voltage?
MAX792SCSE is specified for 2.75V–5.5V operation, but its RESET output is guaranteed functional down to VCC = 1V. Below 2.75V, internal comparators and timers may cease operation, yet the reset path remains active - enabling last-chance reset assertion during deep brownout, as confirmed in Absolute Maximum Ratings and Electrical Characteristics sections.
MAX792SCSE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.91V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX792SCSE FAQ
1.How can I place an order for MAX792SCSE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792SCSE 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 MAX792SCSE reliable?
The price and inventory of MAX792SCSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792SCSE is usually 5 days.
3.What payment methods are accepted for MAX792SCSE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792SCSE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792SCSE?
MAX792SCSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792SCSE 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 MAX792SCSE?
For technical support, including MAX792SCSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792SCSE requirements.
6.How does Aetrix verify that MAX792SCSE is sourced from the original manufacturer or authorized distributors?
All MAX792SCSE 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 MAX792SCSE meets industry standards.
7.What is the process for return or replacement of MAX792SCSE?
All MAX792SCSE units undergo pre-shipment inspection (PSI). If there is an issue with MAX792SCSE, 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 MAX792SCSE part is unused and in its original packaging.
Return procedure for MAX792SCSE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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