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Analog Devices Inc./Maxim Integrated MAX792LCSE+T
- Part No.:
- MAX792LCSE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX792LCSE+T.pdf
- Description:
- IC SUPERVISOR MPU 16-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
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Product details
Overview
MAX792LCSE+T 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 timeout monitoring, and chip-enable signal gating for nonvolatile memory protection. It guarantees RESET validity down to VCC = 1V and features ±2% reset threshold accuracy in internal mode. Used in embedded controllers and industrial instrumentation requiring reliable brownout and software fault detection.
For engineers reviewing the MAX792LCSE+T datasheet, MAX792LCSE+T pinout, MAX792LCSE+T application, or MAX792LCSE+T equivalent, this page delivers verified functional identity, confirmed 16-pin SO package mapping, validated 4.62V nominal reset threshold, exact watchdog timeout behavior (1.6s default), and real-world memory write-cycle completion support - all directly traceable to Maxim's official documentation.
Technical Context
The MAX792LCSE+T implements dual independent comparators: one for reset assertion at 4.62V (±2%) with 200ms timeout delay, and another for low-line warning at 4.74V (120mV above reset) with hysteresis. Its watchdog timer uses an external SWT capacitor or internal 1.6s timeout, with WDPO providing advance pulse warning 70ns before WDO assertion.
It integrates a bidirectional CE transmission gate (10ns max propagation delay) that disables during reset to prevent memory corruption, and supports both internal threshold mode (via RESET IN/INT grounded) and external resistor-programmed thresholds. The device operates from 2.75V to 5.5V and guarantees functionality down to VCC = 1V for RESET output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.62V ±2% - factory-trimmed voltage at which RESET asserts during VCC fall; ensures deterministic brownout response. |
| Low-Line Warning Threshold | 4.74V (4.62V + 120mV) - triggers LOW LINE output prior to reset for early NMI signaling. |
| Power-On Reset Delay | 200ms typical - holds RESET active after VCC rise to guarantee µP initialization stability. |
| Watchdog Timeout (default) | 1.6s nominal - hardware timeout period before WDPO/WDO assert if WDI stalls; configurable via SWT capacitor. |
| CE Propagation Delay | 10ns maximum - enables use with high-speed µPs by preserving timing integrity of chip-enable signals. |
| RESET Validity Range | VCC ≥ 1V - RESET output remains electrically valid even during deep undervoltage conditions. |
| Supply Current | 70µA typical at +25°C - ultra-low quiescent current suitable for battery-backed or energy-sensitive systems. |
Pinout & Package
MAX792LCSE+T is housed in a 16-pin narrow SOIC (SO) package, 3.9mm body width, 1.27mm pitch, RoHS-compliant lead-free construction (+T 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 down to VCC = 1V. |
| 3 | VCC | Main supply input (2.75V–5.5V); powers all internal comparators, timers, and output drivers. |
| 4 | RESET IN/INT | Mode select: ≤60mV → internal threshold mode; ≥600mV → external resistor programming mode. |
| 5 | LLIN/REFOUT | In external mode: low-line comparator input; in internal mode: 1.30V reference output (buffered). |
| 6 | OVO | Open-drain overvoltage comparator output; asserts low when OVI > 1.30V; uncommitted function. |
| 7 | OVI | Inverting input to overvoltage comparator; connect to GND if unused. |
| 8 | SWT | Watchdog timeout control: tied to VCC for 1.6s default; capacitor to GND sets alternative timeout (k×C). |
| 9 | MR | Manual-reset input with internal 1.30V comparator and pull-up; 25µs minimum pulse width required. |
| 10 | LOW LINE | Active-low low-line output; asserts 120mV above reset threshold for early NMI warning. |
| 11 | WDI | Watchdog input; transition resets timer; stall > timeout asserts WDPO then WDO. |
| 12 | GND | Ground reference for all analog and digital circuitry; common return path. |
| 13 | CE OUT | Chip-enable output gated by reset state; goes high-impedance or pulled up during reset to block memory writes. |
| 14 | CE IN | Chip-enable input; transmission gate passes signal only when reset is deasserted. |
| 15 | WDO | Watchdog fault output; open-drain, asserts low on timeout; returns high on next WDI edge. |
| 16 | WDPO | Watchdog pulse output; 1.7ms low pulse preceding WDO by 70ns for advance fault notification. |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail detection | Independent low-line comparator (4.74V) provides 120mV margin before 4.62V reset, enabling early NMI for graceful shutdown. |
| Pulsed watchdog warning (WDPO) | 1.7ms advance pulse precedes WDO assertion by 70ns, allowing external logic (e.g., D flip-flop) to implement two-fault latching shutdown. |
| Memory write-cycle completion | CE OUT remains low for 15µs after reset assertion if CE IN was low, ensuring ongoing RAM/EEPROM write completes before disable. |
| Guaranteed RESET operation down to 1V | Internal driver maintains valid logic levels even during severe brownout, eliminating need for external pull-down in most cases. |
| Configurable watchdog timeout | SWT pin accepts capacitor (≥4.7nF) to scale timeout linearly: 27×C (ms) at 3V, 16.2×C (ms) at 5V. |
Applications
| Industrial PLC Controller Monitoring | Medical Diagnostic Instrument Power Supervision |
|---|---|
Use Scenario: Continuous monitoring of 5V system rail in programmable logic controller with EEPROM configuration storage. IC Role / Device Role / Timing Role: MAX792LCSE+T asserts RESET on brownout, blocks CE during undervoltage, and pulses WDPO/WDO on firmware hang. Use Value: Prevents EEPROM corruption during power loss and enables automatic recovery from software lockup without operator intervention. |
Use Scenario: Power supervision in portable ultrasound device with battery-backed SRAM and safety-critical boot sequence. IC Role / Device Role / Timing Role: Provides 200ms power-on reset hold, low-line warning at 4.74V for pre-reset alert, and guaranteed RESET validity down to VCC = 1V. Use Value: Ensures deterministic boot state and data integrity even during rapid battery depletion or AC adapter disconnect. |
| Telecom Base Station Management Card | Automotive Infotainment Head Unit |
Use Scenario: Supervision of multiple voltage rails (3.3V, 5V) on carrier-grade network equipment management module. IC Role / Device Role / Timing Role: Uses OVI/OVO for overvoltage detection on 5V rail and MR for remote reset via service processor GPIO. Use Value: Adds hardware-level overvoltage protection and field-serviceable reset capability without additional discrete components. |
Use Scenario: Reset and memory protection in infotainment head unit with CAN interface and flash-based firmware storage. IC Role / Device Role / Timing Role: Generates clean reset on ignition power ramp-up, gates CE to NAND flash during brownout, and monitors WDI on CAN message timer. Use Value: Eliminates boot failures due to unstable 5V supply and prevents flash corruption during vehicle start-stop cycles. |
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 DIP package; 4.65V reset threshold; no WDPO output; only WDO with no advance pulse. | Lacks pulsed watchdog warning and memory write-cycle completion timing; unsuitable where two-fault shutdown is required. | Select when board space allows DIP and WDPO functionality is unnecessary; verify CE gating timing matches design. |
| TPS3823MPDBVR | 3-pin SOT-23; 4.63V reset; no manual reset, no watchdog, no CE gating; only basic reset + power-fail. | Minimalist solution for cost-sensitive designs needing only reset and PFI; cannot replace full MAX792LCSE+T feature set. | Choose only for simple reset-only applications; not a functional substitute for watchdog, CE, or low-line functions. |
Compared with MAX692ACPE+, MAX792LCSE+T adds WDPO for advanced fault handling and guaranteed 1V RESET operation; compared with TPS3823MPDBVR, it delivers full supervisory integration-reset, watchdog, low-line, CE gating, and manual reset-in a single 16-pin SOIC.
Availability
MAX792LCSE+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom management cards, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX792LCSE+T 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, medical, and communications applications.
The MAX792 family targets microprocessor supervisory needs in systems without battery backup, integrating reset, watchdog, low-line warning, and memory protection functions into a single compact IC for robust power sequencing and fault recovery.
FAQ
What is the exact reset threshold voltage for MAX792LCSE+T?
The MAX792LCSE+T has a nominal reset threshold voltage of 4.62V with ±2% accuracy over temperature. This value is factory-trimmed and applies in internal threshold mode when RESET IN/INT is grounded. The low-line comparator activates at 4.74V (120mV above reset threshold) to provide early warning before reset assertion. These thresholds are specified in Maxim's official datasheet revision 4, section "ELECTRICAL CHARACTERISTICS".
Does MAX792LCSE+T support watchdog timeout adjustment?
Yes, MAX792LCSE+T supports adjustable watchdog timeout via the SWT pin. With SWT tied to VCC, the default timeout is 1.6s. Connecting a capacitor from SWT to GND sets an alternative timeout: 27 × C (ms) at VCC = 3V or 16.2 × C (ms) at VCC = 5V, where C is capacitance in nanofarads and ≥4.7nF. This behavior is confirmed in the "WATCHDOG FUNCTION" section of the datasheet.
How does the CE IN/CE OUT gating function work in MAX792LCSE+T?
The MAX792LCSE+T implements a transmission gate between CE IN and CE OUT that enables chip-enable pass-through only when reset is deasserted. During reset, CE IN becomes high-impedance and CE OUT is pulled up to VCC. If CE IN is low when reset asserts, CE OUT stays low for 15µs to complete the current memory write cycle - a feature explicitly documented in the "CHIP-ENABLE SIGNAL GATING" section of the datasheet.
Can MAX792LCSE+T operate below 2.75V supply voltage?
While the recommended operating range is 2.75V to 5.5V, MAX792LCSE+T guarantees RESET output validity down to VCC = 1V in internal threshold mode. The reset comparator continues functioning, and RESET remains electrically valid (0.1V low, VCC−1V high) even at 1V. However, other functions like watchdog and CE gating may be disabled below 2.75V - this limitation is stated in Note 1 of the datasheet Absolute Maximum Ratings table.
What is the purpose of the WDPO pin on MAX792LCSE+T?
The WDPO (Watchdog Pulse Output) pin on MAX792LCSE+T delivers a 1.7ms low pulse 70ns before WDO asserts, providing advance warning of impending watchdog fault. This enables external logic (e.g., a D flip-flop) to implement two-consecutive-fault latching shutdown - a key safety feature documented in Figure 8 and the "Watchdog-Pulse Output" section of the datasheet.
MAX792LCSE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- 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
MAX792LCSE+T FAQ
1.How can I place an order for MAX792LCSE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX792LCSE+T 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 MAX792LCSE+T reliable?
The price and inventory of MAX792LCSE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX792LCSE+T is usually 5 days.
3.What payment methods are accepted for MAX792LCSE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX792LCSE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX792LCSE+T?
MAX792LCSE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX792LCSE+T 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 MAX792LCSE+T?
For technical support, including MAX792LCSE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX792LCSE+T requirements.
6.How does Aetrix verify that MAX792LCSE+T is sourced from the original manufacturer or authorized distributors?
All MAX792LCSE+T 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 MAX792LCSE+T meets industry standards.
7.What is the process for return or replacement of MAX792LCSE+T?
All MAX792LCSE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX792LCSE+T, 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 MAX792LCSE+T part is unused and in its original packaging.
Return procedure for MAX792LCSE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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