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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 MCU AND NV MEMORY
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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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 detection), watchdog timer with pulsed fault output, and chip-enable signal gating for nonvolatile memory protection. It features 4.62V internal reset threshold, guaranteed RESET validity down to VCC = 1V, and 200ms reset timeout delay. Used in embedded controllers and industrial instrumentation requiring reliable power monitoring.
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 narrow SO package mapping, validated pin roles including RESET/RESET, MR, WDI, WDPO/WDO, CE IN/CE OUT, LLIN/REFOUT, and exact threshold and timing specifications per Maxim's official documentation.
Technical Context
The MAX792LCSE-T implements dual-comparator architecture: one for reset assertion at 4.62V ±3% (internal mode), another for low-line warning at 4.74V (120mV above reset threshold), both with 15mV hysteresis. Its watchdog uses an external capacitor on SWT to set timeout (1.6s nominal with SWT = VCC), and generates WDPO pulse (min 500µs) preceding WDO assertion by 70ns for early fault signaling.
Chip-enable gating operates via a transmission gate between CE IN and CE OUT, enabling pass-through during normal operation and disabling during reset with ≤10ns propagation delay. The device supports both internal threshold mode (RESET IN/INT = GND) and external programming mode (RESET IN/INT ≥600mV), with MR input internally pulled up and compatible with TTL/CMOS logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.62V ±3% - sets precise brownout detection point for 5V systems |
| Low-Line Threshold | 4.74V (120mV above reset) - provides advance NMI warning before reset asserts |
| Reset Timeout Delay | 200ms typical - ensures stable power-up before µP release |
| Watchdog Timeout (SWT = VCC) | 1.6s nominal - detects software hang without external components |
| CE Propagation Delay | ≤10ns max - enables use with high-speed µPs without timing violation |
| Supply Current | 70µA typical at +25°C - minimizes quiescent load on regulated supply |
| Operating Voltage Range | 2.75V to 5.5V - supports 3V and 5V systems with guaranteed 1V RESET validity |
Pinout & Package
MAX792LCSE-T is housed in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, 1.27mm pitch, RoHS-compliant lead-free option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | RESET / RESET | Active-low and active-high complementary reset outputs; RESET valid down to VCC = 1V |
| 3 | VCC | Main supply input (2.75V–5.5V); powers all internal comparators and logic |
| 4 | RESET IN/INT | Mode select: GND = internal threshold; ≥600mV = external resistor divider programming |
| 5 | LLIN/REFOUT | In external mode: low-line comparator input; in internal mode: buffered 1.30V reference output |
| 9 | MR | Manual reset input with 1.30V threshold and internal pull-up; 25µs min pulse width required |
| 10 | LOW LINE | Open-drain NMI output asserted 120mV above reset threshold during VCC fall |
| 11 | WDI | Watchdog input; transition resets timer; no activity >1.6s triggers WDPO/WDO |
| 14 | CE IN | Chip-enable input gated during reset; high-impedance when reset active |
| 13 | CE OUT | Gated CE output; disabled during reset to prevent RAM corruption |
| 15, 16 | WDO / WDPO | WDO = latched watchdog fault; WDPO = 500µs–6ms pulse preceding WDO by 70ns |
| 6, 7 | OVO / OVI | OVI = overvoltage comparator input (1.30V threshold); OVO = open-drain output |
| 8 | SWT | Set watchdog timeout: VCC = 1.6s; capacitor to GND scales timeout linearly |
| 12 | GND | Analog/digital ground reference for all comparators and outputs |
Key Features
| Feature | Design Value |
|---|---|
| Two-stage power-fail detection | Independent low-line comparator asserts NMI 120mV above reset threshold, enabling preemptive system response |
| Pulsed watchdog output (WDPO) | Generates 500µs–6ms advance warning pulse before WDO latches, allowing software recovery or hardware escalation |
| Chip-enable transmission gate | ≤10ns propagation delay and automatic disable during reset prevents partial write cycles in CMOS RAM/EEPROM |
| Guaranteed RESET validity to 1V | Ensures deterministic reset behavior even during deep brownout, critical for fail-safe shutdown sequences |
| External threshold programming support | RESET IN/INT pin enables resistor-divider configuration for custom reset/low-line thresholds beyond factory options |
Applications
| Industrial PLC Controller Monitoring | Medical Diagnostic Instrument Power Supervision |
|---|---|
Use Scenario: Continuous monitoring of 5V main supply in programmable logic controller rack modules subject to transient line sags. IC Role / Device Role / Timing Role: Supervisory IC asserting LOW LINE NMI at 4.74V and RESET at 4.62V, with 200ms timeout ensuring clean µP restart after sag recovery. Use Value: Prevents spurious logic execution during undervoltage; enables firmware-triggered graceful shutdown upon low-line warning. | Use Scenario: Power integrity assurance in portable ultrasound imaging units using battery-backed 3.3V/5V rails. IC Role / Device Role / Timing Role: Dual-voltage supervisor providing reset, manual reset via front-panel button, and watchdog supervision of ARM-based control processor. Use Value: Guarantees safe state entry during battery depletion; WDPO pulse allows diagnostic logging before WDO forces hard reset. |
| Telecom Base Station Management Card | Automotive Body Control Module (BCM) |
Use Scenario: Monitoring auxiliary 5V supply powering FPGA configuration and communication interfaces in remote radio head units. IC Role / Device Role / Timing Role: Supervisor with CE IN/CE OUT gating protecting configuration EEPROM from corruption during power ramp-down. Use Value: 10ns CE propagation delay preserves timing margins; CE OUT holdover (15µs) ensures write completion before reset assertion. | Use Scenario: Supervising 5V microcontroller supply in vehicle door module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Reset generator with ±3% threshold accuracy and MR input tied to service port, supporting field diagnostics and forced reset. Use Value: 4.62V threshold aligns with automotive 5V regulator dropout; RESET validity to 1V covers cold-crank brownout profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX792MCSE-T | 4.37V reset threshold (vs. 4.62V); otherwise identical pinout, features, and timing | Suitable for systems with tighter 5V rail tolerance or lower dropout regulators | Select when design requires earlier reset assertion than 4.62V permits |
| TPS3823-46DBVR | Single-output (RESET only), no WDPO/WDI, no CE gating, fixed 4.63V threshold, 200ms delay | Lacks low-line NMI, watchdog, and memory protection features; simpler BOM | Choose only if full MAX792LCSE-T feature set is unnecessary and cost reduction is primary |
Compared with MAX792MCSE-T, the MAX792LCSE-T provides higher reset threshold for improved noise margin in noisy 5V environments; compared with TPS3823-46DBVR, it adds essential safety features-dual reset outputs, NMI warning, watchdog escalation, and CE gating-for mission-critical embedded control.
Availability
MAX792LCSE-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic instruments, telecom management cards, and automotive body control modules requiring stable component supply across extended temperature ranges (0°C to +70°C).
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 industrial, communications, and computing applications.
The MAX792 family targets microprocessor supervisory functions in resource-constrained embedded systems, integrating reset, watchdog, memory protection, and voltage monitoring in a single 16-pin SOIC package.
FAQ
What is the exact reset threshold voltage for MAX792LCSE-T?
The MAX792LCSE-T has a factory-programmed internal reset threshold of 4.62V ±3%, specified at TA = +25°C and valid across its operating temperature range (0°C to +70°C). This value is fixed and cannot be altered without switching to external programming mode using the RESET IN/INT pin and an external resistor divider. The MAX792LCSE-T datasheet confirms this threshold in the Electrical Characteristics table under "Reset Threshold Voltage-Internal Threshold Mode".
Does MAX792LCSE-T support watchdog functionality, and how is timeout configured?
Yes, MAX792LCSE-T includes a configurable watchdog timer. Timeout is set via the SWT pin: connecting SWT to VCC yields a nominal 1.6s period; connecting a capacitor from SWT to GND scales timeout linearly (k × C, where k = 16.2 for VCC = 5V). The device also provides WDPO-a 500µs to 6ms pulse preceding WDO assertion by 70ns-to enable early fault handling. Watchdog operation is disabled when VCC falls below the reset threshold.
How does the chip-enable (CE) gating function work in MAX792LCSE-T?
The MAX792LCSE-T gates CE signals using an internal transmission gate between CE IN (pin 14) and CE OUT (pin 13). During normal operation, CE transitions pass through with ≤10ns delay. When reset is asserted, the gate disables: CE IN becomes high-impedance, and CE OUT is held high. If CE IN is low at reset assertion, CE OUT remains low for 15µs to complete the current memory write cycle-preventing data corruption in CMOS RAM or EEPROM.
Can MAX792LCSE-T generate a non-maskable interrupt (NMI) signal?
Yes, MAX792LCSE-T provides a dedicated LOW LINE output (pin 10) designed explicitly for NMI generation. In internal threshold mode, LOW LINE asserts 120mV above the 4.62V reset threshold (i.e., at 4.74V) during VCC fall, delivering advance warning before reset activation. This allows firmware to initiate controlled shutdown, save state, or log events prior to forced reset-enhancing system reliability in critical applications.
What package type and pin count does MAX792LCSE-T use?
MAX792LCSE-T is supplied in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, 1.27mm lead pitch, with鸥翼 (gull-wing) leads. The "CSE" suffix in the part number explicitly denotes this package per Maxim's Ordering Information table. It is RoHS-compliant and available in lead-free version (denoted by "+" suffix, e.g., MAX792LCSE+T).
MAX792LCSE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Open Drain or Open Collector
- 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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