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Analog Devices Inc./Maxim Integrated MAX792RCSE+
- Part No.:
- MAX792RCSE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX792RCSE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:802
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Product details
Overview
MAX792RCSE+ from Maxim Integrated is a microprocessor supervisory circuit providing reset generation, manual reset input, two-stage power-fail warning (low-line comparator 120mV above reset threshold), watchdog timer with pulsed fault output (WDPO), and chip-enable signal gating for nonvolatile memory protection. It guarantees RESET validity down to VCC = 1V and supports external reset/low-line threshold programming via resistor divider. Used in embedded controllers requiring reliable brownout and software fault detection.
For engineers reviewing the MAX792RCSE+ datasheet, MAX792RCSE+ pinout, MAX792RCSE+ application, or MAX792RCSE+ equivalent, this page delivers verified functional identity, confirmed 16-pin narrow SOIC package mapping, validated 4.62V internal reset threshold, documented 200ms reset timeout, and real-world timing roles in µP power monitoring and RAM write-cycle completion.
Technical Context
The MAX792RCSE+ integrates independent reset, low-line, overvoltage, and watchdog comparators with internal 1.30V reference and programmable thresholds. Its dual reset outputs (RESET and RESET) operate with guaranteed validity at VCC ≥1V, while the CE IN/CE OUT transmission gate enforces ≤10ns propagation delay and automatic write-cycle completion during power-down.
Watchdog timeout is factory-set to 1.6s (SWT tied to VCC) or adjustable via external capacitor (k=16.2 for VCC=5V), and WDPO provides 1.7ms advance pulse preceding WDO assertion by 70ns - enabling hardware latching of consecutive faults using external D flip-flop logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.62V nominal (R suffix), ±3% accuracy over 0°C to +70°C - sets precise brownout detection point for 5V systems |
| Reset Timeout Period | 200ms typical after VCC rise - ensures stable µP initialization before code execution |
| Supply Current | 70µA typical at +25°C - enables low-power operation in battery-backed or energy-sensitive systems |
| Chip-Enable Propagation Delay | 10ns maximum - preserves timing integrity for high-speed µP address/data bus gating |
| Watchdog Timeout (default) | 1.6s nominal with SWT = VCC - balances fault detection latency and false-trigger immunity |
| Low-Line Threshold Offset | 120mV above reset threshold - provides early NMI warning before reset assertion during VCC sag |
| RESET Output Validity | Guaranteed down to VCC = 1V - maintains deterministic reset state during deep brownout |
Pinout & Package
MAX792RCSE+ is housed in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, standard JEDEC MS-012AC footprint, RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 | RESET / RESET | Complementary active-low and active-high reset outputs - drive µP reset pin directly without level-shifting |
| 3 | VCC | Main supply input (2.75V–5.5V) - powers all internal comparators, timers, and transmission gate |
| 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 - signals OVI >1.30V; uncommitted, no effect on other functions |
| 7 | OVI | Inverting input to overvoltage comparator - connect to voltage divider for custom overvoltage trip point |
| 8 | SWT | Set Watchdog Timeout input - capacitor-to-GND selects timeout; tie to VCC for 1.6s default |
| 9 | MR | Manual reset input - 1.30V threshold, 25µs minimum pulse width, internally pulled up to VCC |
| 10 | LOW LINE | Active-low low-line output - asserts 120mV above reset threshold to trigger µP NMI interrupt |
| 11 | WDI | Watchdog input - edge-sensitive; transition resets watchdog timer; idle high/low triggers WDPO/WDO |
| 12 | GND | Ground reference - common return for all analog and digital circuitry |
| 13 | CE OUT | Chip-enable output - gated pass-through of CE IN, disabled during reset to prevent RAM corruption |
| 14 | CE IN | Chip-enable input - series transmission gate input; high-impedance when reset asserted |
| 15 | WDO | Watchdog fault output - open-drain, asserts low on timeout; used for system shutdown or MR assertion |
| 16 | WDPO | Watchdog pulse output - 1.7ms low pulse preceding WDO by 70ns; clocks external latch for dual-fault detection |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail warning | Independent low-line comparator asserts 120mV above reset threshold - enables preemptive NMI before reset, avoiding data loss |
| Pulsed watchdog output (WDPO) | 1.7ms advance pulse preceding WDO assertion - allows external logic to distinguish first vs. consecutive faults |
| Chip-enable signal gating | ≤10ns CE IN→CE OUT propagation delay with automatic 15µs hold on CE OUT during reset deassertion - ensures RAM write-cycle completion |
| Reset validity at ultra-low VCC | RESET guaranteed functional down to VCC = 1V - supports robust operation during severe brownout or backup battery switchover |
| External threshold programming | RESET IN/INT pin selects between factory-set (R=4.62V) and user-defined thresholds via resistor divider - enables flexible supply monitoring across multiple rails |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Programmable logic controller operating in factory environments with fluctuating 24VDC-derived 5V supplies subject to transient sags. IC Role / Device Role / Timing Role: Supervises 5V rail, asserts LOW LINE to µP NMI pin 120mV before reset, then asserts RESET after 200ms timeout to force controlled reboot. Use Value: Prevents spurious I/O state changes during brownout by triggering early NMI for graceful I/O freeze, followed by full reset only if sag persists - minimizing downtime. |
Use Scenario: Portable ultrasound device with battery/supply switchover and critical nonvolatile parameter storage in CMOS RAM. IC Role / Device Role / Timing Role: Gating CE IN→CE OUT path during VCC drop below 4.62V; holds CE OUT low for 15µs after reset deassertion to complete last RAM write. Use Value: Eliminates risk of corrupted calibration data during power transition by enforcing write-cycle completion before µP resumes execution. |
| Telecom Base Station Management | Automotive Infotainment Head Unit |
Use Scenario: Remote radio unit with watchdog-monitored firmware managing RF power amplifiers and thermal sensors. IC Role / Device Role / Timing Role: WDI connected to µP timer output; WDPO pulses 1.7ms before WDO to clock external D flip-flop; second pulse latches MR low for hardware reset. Use Value: Converts software hang into deterministic hardware shutdown - prevents RF amplifier lockup and thermal runaway without host intervention. |
Use Scenario: Infotainment head unit powered from vehicle battery (9V–16V) with 5V LDO, requiring brownout resilience during engine cranking. IC Role / Device Role / Timing Role: Internal threshold mode with 4.62V reset; RESET output drives µP reset pin; RESET IN/INT grounded; LLIN/REFOUT unused. Use Value: Guarantees µP remains held in reset until 5V rail stabilizes post-cranking, avoiding boot failure or undefined behavior during 500ms voltage dip. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX820RCSE+ | ±2% reset/low-line threshold accuracy (vs. ±3% for MAX792RCSE+); identical pinout, timing, and feature set | Required where tighter voltage monitoring tolerance is mandated for safety-critical brownout response | Select MAX820RCSE+ when design requires certified ±2% threshold accuracy per datasheet spec; otherwise MAX792RCSE+ suffices for general industrial use. |
| TPS3808G33DBVR | Single reset output (active-low only), no low-line/NMI output, no CE gating, no WDPO; 3.3V fixed threshold, 200ms timeout | Limited to basic reset supervision in 3.3V systems without advanced fault signaling or memory protection | Choose TPS3808G33DBVR only for cost-sensitive 3.3V designs omitting NMI, watchdog pulsing, and CE control - not a functional replacement. |
Compared with MAX820RCSE+, the MAX792RCSE+ trades ±2% threshold accuracy for lower cost in non-safety-critical applications; versus TPS3808G33DBVR, it delivers full supervisory functionality - including dual reset outputs, low-line NMI, CE gating, and WDPO - essential for robust µP system recovery and data integrity.
Availability
MAX792RCSE+ 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 guaranteed long-term availability.
Supply support for MAX792RCSE+ 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 demanding industrial, communications, and computing applications.
The MAX792/MAX820 product line was engineered specifically for microprocessor-based systems needing coordinated reset, power-fail warning, watchdog fault detection, and nonvolatile memory write protection - targeting reliability-critical embedded control.
FAQ
What is the exact reset threshold voltage of the MAX792RCSE+?
The MAX792RCSE+ has a nominal reset threshold voltage of 4.62V, indicated by the 'R' suffix in the part number. This value is factory-trimmed and specified with ±3% accuracy over the 0°C to +70°C operating temperature range. The threshold is valid for both internal and external programming modes, though external resistors can override it when RESET IN/INT is pulled above 600mV. The MAX792RCSE+ guarantees RESET output functionality down to VCC = 1V, making it suitable for deep brownout scenarios.
Does the MAX792RCSE+ support watchdog timeout adjustment?
Yes, the MAX792RCSE+ supports adjustable watchdog timeout via the SWT (Set Watchdog Timeout) pin. With SWT tied to VCC, the default timeout is 1.6 seconds. To select an alternative period, connect a capacitor from SWT to GND: timeout = k × C (in nF), where k = 16.2 for VCC = 5V and k = 27 for VCC = 3V. Capacitor values must exceed 4.7nF for predictable operation. The MAX792RCSE+ does not support digital register-based timeout configuration - adjustment is strictly analog via external capacitance.
How does the chip-enable gating function work on the MAX792RCSE+?
The MAX792RCSE+ implements chip-enable gating using a transmission gate between CE IN (pin 14) and CE OUT (pin 13). During normal operation, CE IN passes directly to CE OUT with ≤10ns propagation delay. When reset is asserted, the gate disables and CE OUT is pulled high. If CE IN is low at reset assertion, CE OUT remains low for 15µs to ensure RAM write-cycle completion. This function is fully integrated - no external logic required - and is a core feature distinguishing the MAX792RCSE+ from basic reset supervisors.
Can the MAX792RCSE+ generate an early warning before reset assertion?
Yes, the MAX792RCSE+ provides early warning via its LOW LINE output (pin 10), which asserts 120mV above the reset threshold - for example, at ~4.74V when the reset threshold is 4.62V. This signal connects directly to a µP's NMI (non-maskable interrupt) pin, allowing firmware to execute controlled shutdown routines (e.g., save state, disable peripherals) before the 200ms reset timeout expires and RESET is asserted. The low-line comparator includes 15mV hysteresis to prevent chatter during slow VCC recovery.
What is the role of the WDPO pin on the MAX792RCSE+?
The WDPO (Watchdog Pulse Output) pin (16) on the MAX792RCSE+ delivers a 1.7ms low pulse that precedes WDO assertion by 70ns upon watchdog timeout. Its purpose is to enable hardware-level detection of consecutive faults: WDPO clocks an external D flip-flop, and a second WDPO pulse (indicating back-to-back timeouts) forces MR low for latched hardware reset. Unlike WDO, WDPO is not a fault indicator alone - it is a timing-controlled advance signal designed specifically for building fail-safe shutdown logic, a capability not found in simpler watchdog ICs.
MAX792RCSE+ 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:
- 2.61V
- 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
MAX792RCSE+ FAQ
1.How can I place an order for MAX792RCSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792RCSE+ 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 MAX792RCSE+ reliable?
The price and inventory of MAX792RCSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792RCSE+ is usually 5 days.
3.What payment methods are accepted for MAX792RCSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792RCSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792RCSE+?
MAX792RCSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792RCSE+ 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 MAX792RCSE+?
For technical support, including MAX792RCSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792RCSE+ requirements.
6.How does Aetrix verify that MAX792RCSE+ is sourced from the original manufacturer or authorized distributors?
All MAX792RCSE+ 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 MAX792RCSE+ meets industry standards.
7.What is the process for return or replacement of MAX792RCSE+?
All MAX792RCSE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX792RCSE+, 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 MAX792RCSE+ part is unused and in its original packaging.
Return procedure for MAX792RCSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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