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Analog Devices Inc./Maxim Integrated MAX792SESE+
- Part No.:
- MAX792SESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX792SESE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
MAX792SESE+ 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 timer with pulsed fault output (WDPO), and chip-enable gating for CMOS RAM protection. It operates over 0°C to +70°C, features ±2% reset threshold accuracy in external programming mode, and guarantees RESET validity down to VCC = 1V.
For engineers reviewing the MAX792SESE+ datasheet, MAX792SESE+ pinout, MAX792SESE+ application, or MAX792SESE+ equivalent, this page delivers verified functional identity, confirmed 16-pin narrow SO package mapping, validated 200ms reset timeout, exact watchdog timing behavior (1.6s nominal with SWT=VCC), and real-world memory write-cycle completion support via CE IN/CE OUT transmission gate.
Technical Context
The MAX792SESE+ integrates independent reset, low-line, watchdog, overvoltage, and chip-enable control blocks sharing a common VCC supply and internal 1.30V reference. Its dual-mode threshold selection-internal (RESET IN/INT ≤60mV) or external (≥600mV)-directly configures comparator inputs to either factory-trimmed dividers or user-defined resistor networks.
Reset assertion occurs on VCC fall below threshold, MR <1.30V, or watchdog timeout; all paths trigger synchronous 200ms minimum reset pulse and disable CE transmission gate. WDPO pulses low 70ns before WDO during timeout, enabling hardware shutdown sequencing without software intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.91V nominal (S-suffix), ±2% accuracy in external programming mode, enabling precise brownout detection at system-specific voltage margins. |
| Reset Timeout Period | 200ms typical after VCC rise or MR release, ensuring reliable µP initialization across power-up transients. |
| Watchdog Timeout | 1.6s nominal with SWT tied to VCC; adjustable via capacitor on SWT pin (k=16.2 @5V, k=27 @3V), supporting flexible firmware supervision intervals. |
| Chip-Enable Propagation Delay | 10ns maximum from CE IN to CE OUT, allowing safe integration with high-speed µP address/data buses without timing violation. |
| Supply Current | 70µA typical at +25°C, VCC=5V, enabling low-quiescent-power operation in battery-backed or energy-sensitive systems. |
| Operating Temperature | 0°C to +70°C, validated for commercial-grade embedded controllers, industrial HMIs, and instrumentation requiring stable reset behavior across ambient range. |
| Package | 16-pin narrow SO (SOIC), 3.9mm body width, surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. |
Pinout & Package
MAX792SESE+ uses a 16-pin narrow SO (SOIC) package with 0.300-inch body width and 0.050-inch lead pitch. Pin 1 is marked by a beveled corner or dot; pins are numbered counterclockwise starting from top-left when viewed from top with marking side up.
| 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, guaranteed valid down to VCC=1V for fail-safe boot sequencing. |
| 3 | VCC | Main supply input (2.75V–5.5V); powers all internal comparators, timers, and transmission gates. |
| 4 | RESET IN/INT | Mode select: ≤60mV enables internal threshold mode; ≥600mV enables external resistor-divider programming of reset and low-line thresholds. |
| 5 | LLIN/REFOUT | In external mode: low-line comparator input; in internal mode: buffered 1.30V reference output for external circuitry. |
| 6,7 | OVO / OVI | Uncommitted overvoltage comparator: OVI is inverting input (threshold = 1.30V), OVO is open-drain output used for independent overvoltage alarm. |
| 8 | SWT | Set Watchdog Timeout input: tied to VCC for 1.6s default; capacitor to GND scales timeout linearly (e.g., 100nF → ~1.62s @5V). |
| 9 | MR | Manual-reset input with internal 1.30V comparator and high-impedance pull-up; 25µs minimum pulse width required for reliable assertion. |
| 10 | LOW LINE | Active-low low-line output asserted 120mV above reset threshold in internal mode, providing early NMI warning before reset triggers. |
| 11 | WDI | Watchdog input detecting µP activity; transition (high/low/pulse ≥100ns) resets internal timer; no transition within timeout asserts WDPO/WDO. |
| 12 | GND | Ground reference for all analog and digital functions; must be low-impedance connection to minimize noise coupling into comparators. |
| 13 | CE OUT | Chip-enable output gated by CE IN and reset state; goes high-impedance during reset to prevent spurious memory writes during brownout. |
| 14 | CE IN | Chip-enable input passed through transmission gate; disabled during reset to isolate memory bus from unstable µP signals. |
| 15,16 | WDO / WDPO | WDPO pulses low 70ns before WDO for advance warning; WDO remains latched low until next WDI transition, enabling hardware fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail warning | LOW LINE asserts 120mV above reset threshold with 15mV hysteresis, delivering deterministic NMI timing margin before system reset. |
| Memory write-cycle completion | CE OUT holds low for 15µs after reset assertion if CE IN was low, ensuring ongoing RAM write completes before bus isolation. |
| Pulsed watchdog output (WDPO) | Generates 500µs–6ms low pulse 70ns before WDO, enabling external flip-flop latching for two-fault shutdown without µP involvement. |
| On-board chip-enable gating | 10ns max propagation delay CE IN→CE OUT transmission gate prevents corrupted memory access during VCC transients. |
| Voltage monitor for overvoltage warning | OVI/OVO comparator operates independently with 1.30V threshold, supporting external supply monitoring without affecting core supervisory functions. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power monitoring in programmable logic controller CPU modules where brownout must trigger controlled I/O shutdown before µP lockup. IC Role / Device Role / Timing Role: Primary reset supervisor asserting RESET and LOW LINE outputs to halt execution and signal power degradation to FPGA-based I/O manager. Use Value: 200ms reset timeout ensures full µP register save before power collapse; ±2% threshold accuracy prevents false trips during line sags. | Use Scenario: Critical power sequencing in portable ultrasound units requiring guaranteed boot integrity after battery swap or AC adapter disconnect. IC Role / Device Role / Timing Role: Dual-role supervisor providing both reset assertion (RESET) and early warning (LOW LINE) to ARM Cortex-M4 host and analog front-end ASIC. Use Value: RESET validity down to VCC=1V enables last-chance firmware save; WDPO pulse triggers backup SRAM retention before main power loss. |
| Telecom Base Station Management | Automotive Infotainment Head Unit |
Use Scenario: Monitoring 3.3V management rail in remote radio head units exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Supervisory interface between PMIC and baseband processor, using external resistor divider (R1/R2/R3) to set custom 3.06V reset threshold. Use Value: External programming mode allows precise alignment with PMIC UVLO; 0.016×VTH hysteresis prevents chatter near threshold crossing. | Use Scenario: Power integrity assurance in infotainment head units with multi-rail supplies (5V, 3.3V, 1.8V) and CAN bus connectivity. IC Role / Device Role / Timing Role: Dedicated 2.91V reset supervisor for application processor subsystem, with MR tied to service button and WDI monitored on SPI clock line. Use Value: 1.6s watchdog timeout matches firmware heartbeat interval; CE IN/CE OUT gating protects eMMC boot partition during ignition cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX820SESE+ | Guarantees ±2% reset/low-line threshold accuracy across full temperature range; MAX792SESE+ specifies ±2% only in external programming mode. | Required for designs needing guaranteed accuracy over -40°C to +85°C without external calibration. | Select MAX820SESE+ when operating beyond 0°C to +70°C or when tighter tolerance is mandated by safety standards. |
| TPS3808G33DBVR | Single-output (active-low reset only), no low-line output, no WDPO, no CE gating; 3.3V fixed threshold, 200ms timeout, 1.8µA quiescent current. | Suitable for cost-sensitive, space-constrained applications lacking need for NMI warning or memory protection. | Choose TPS3808G33DBVR only if low-pin-count, ultra-low-power reset-only function suffices and dual outputs/advanced features are unnecessary. |
Compared with MAX820SESE+, MAX792SESE+ trades guaranteed wide-temperature accuracy for lower cost in commercial-grade systems; versus TPS3808G33DBVR, it provides comprehensive supervision (dual reset, low-line, watchdog, CE gating) at higher quiescent current but essential for complex µP systems requiring layered fault response.
Availability
MAX792SESE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom base station management units, and automotive infotainment head units requiring stable component supply with long-term lifecycle support.
Supply support for MAX792SESE+ 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 power, sensing, and interface applications in industrial, medical, and communications markets.
The MAX792/MAX820 product line delivers integrated microprocessor supervision with reset, watchdog, low-line warning, and memory protection-engineered for reliability-critical embedded systems where power integrity directly impacts functional safety.
FAQ
What is the exact reset threshold voltage for MAX792SESE+?
The MAX792SESE+ 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 when used in external programming mode. In internal threshold mode, the device maintains this same nominal threshold, though absolute accuracy depends on temperature drift and supply variation as documented in the Electrical Characteristics table.
Does MAX792SESE+ support watchdog timeout adjustment, and how is it implemented?
Yes, MAX792SESE+ supports adjustable watchdog timeout via the SWT pin. With SWT tied to VCC, the nominal timeout is 1.6 seconds. To adjust, connect a capacitor from SWT to GND: timeout = k × C (in nF), where k = 16.2 at VCC = 5V and k = 27 at VCC = 3V. Capacitor values above 4.7nF are recommended; floating or grounded SWT is prohibited.
How does the chip-enable gating function work in MAX792SESE+?
The MAX792SESE+ implements chip-enable gating using a transmission gate between CE IN and CE OUT. During normal operation, CE IN transitions pass through with ≤10ns delay. When reset is asserted, the gate disables: CE IN becomes high-impedance, and CE OUT is pulled high. If CE IN is low at reset assertion, CE OUT remains low for 15µs to complete the current memory write cycle before isolation.
Can MAX792SESE+ generate an early warning signal before reset assertion?
Yes, MAX792SESE+ provides early warning via the LOW LINE output, which asserts 120mV above the reset threshold in internal threshold mode. This gives deterministic advance notice-typically tens of microseconds before RESET activation-enabling non-maskable interrupt (NMI) handling for graceful shutdown, data save, or fault logging prior to full reset.
What is the purpose of the LLIN/REFOUT pin on MAX792SESE+?
The LLIN/REFOUT pin serves dual roles depending on mode: in internal threshold mode (RESET IN/INT ≤60mV), it outputs a buffered 1.30V reference for external circuitry; in external programming mode (RESET IN/INT ≥600mV), it becomes the low-line comparator input, accepting a user-defined voltage divider to set custom low-line detection thresholds independent of reset threshold.
MAX792SESE+ 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:
- Active
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX792SESE+ FAQ
1.How can I place an order for MAX792SESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792SESE+ 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 MAX792SESE+ reliable?
The price and inventory of MAX792SESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792SESE+ is usually 5 days.
3.What payment methods are accepted for MAX792SESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792SESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792SESE+?
MAX792SESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792SESE+ 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 MAX792SESE+?
For technical support, including MAX792SESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792SESE+ requirements.
6.How does Aetrix verify that MAX792SESE+ is sourced from the original manufacturer or authorized distributors?
All MAX792SESE+ 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 MAX792SESE+ meets industry standards.
7.What is the process for return or replacement of MAX792SESE+?
All MAX792SESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX792SESE+, 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 MAX792SESE+ part is unused and in its original packaging.
Return procedure for MAX792SESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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