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Analog Devices Inc./Maxim Integrated MAX706PESA+T
- Part No.:
- MAX706PESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706PESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,306
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Product details
Overview
MAX706PESA+T from Maxim Integrated is an active-high reset, +3V microprocessor supervisory circuit with watchdog timer, 2.63V reset threshold, 1.6s watchdog timeout, and 1.25V power-fail comparator input-designed for reliable power-up/power-down monitoring in battery-powered portable instruments and embedded controllers.
For engineers reviewing the MAX706PESA+T datasheet, MAX706PESA+T pinout, MAX706PESA+T application, or MAX706PESA+T equivalent, this device delivers precision voltage supervision, manual reset debouncing, low-quiescent-current operation (100µA), and guaranteed RESET assertion down to VCC = 1V-critical for low-voltage system integrity and brownout resilience.
Technical Context
The MAX706PESA+T integrates a precision reset generator with 2.63V ±1.5% threshold and 200ms reset pulse width, a 1.6s watchdog timer with WDI edge-triggered reset, and a dedicated 1.25V reference-based power-fail comparator (PFI/PFO). Its active-high RESET output asserts when VCC falls below 2.63V or MR is pulled low, and deasserts after 200ms once VCC exceeds threshold.
It operates across VCC = 2.7V to 5.5V, draws only 100µA quiescent current, guarantees RESET assertion down to VCC = 1V, and features TTL/CMOS-compatible MR input with 500ns minimum pulse width at 3V. The watchdog function cannot be disabled-unlike MAX706AP variants-and WDO asserts on timeout or VCC brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% - precisely monitors +3V supply for valid operation before µP release |
| Reset Pulse Width | 200ms typical - ensures sufficient hold time for full µP initialization and memory stabilization |
| Watchdog Timeout | 1.6s ±40% - provides robust software hang detection without excessive false triggers |
| Supply Current | 100µA max - enables long battery life in portable and always-on monitoring applications |
| PFI Threshold | 1.25V ±40mV - supports accurate power-fail warning or low-battery detection via external resistor divider |
| RESET Output Polarity | Active-high - directly interfaces with µP reset inputs requiring high-asserted reset (e.g., many ARM Cortex-M, PIC, MSP430) |
| VCC Operating Range | 2.7V to 5.5V - supports dual-supply systems (e.g., +3.3V logic with +5V peripherals) without level-shifting |
Pinout & Package
MAX706PESA+T is housed in an 8-pin µMAX® package (U8-1), measuring 3mm × 3mm × 0.8mm, with exposed pad for thermal enhancement and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA source; 500ns min pulse width at 3V; debounces pushbutton resets |
| 2 (VCC) | Positive supply input | Accepts 2.7V–5.5V; bypassing with 0.1µF capacitor to GND required for noise immunity |
| 3 (GND) | Ground reference | Common return for all internal circuits and output sinks; must be low-impedance connection |
| 4 (PFI) | Power-fail comparator input | High-impedance node referenced to 1.25V internal bandgap; connects to resistive divider for custom trip point |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; used to trigger µP interrupt or assert MR for early-warning shutdown |
| 6 (WDI) | Watchdog input | Edge-sensitive; requires toggle within 1.6s to prevent WDO assertion; no disable capability in MAX706P variant |
| 7 (RESET) | Active-high reset output | Guaranteed high when VCC ≥ 1V and above threshold; remains asserted 200ms after recovery |
| 8 (WDO) | Active-low watchdog output | Asserts on 1.6s timeout or VCC brownout; releases immediately upon VCC recovery (unlike RESET) |
Key Features
| Feature | Design Value |
|---|---|
| Active-high RESET output | Eliminates need for external inverter when interfacing with µPs requiring high-active reset (e.g., STM32, NXP LPC) |
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout-critical for flash write integrity and state retention |
| Debounced manual reset input | 140ms minimum internal reset pulse width prevents contact bounce from causing spurious resets |
| 1.25V precision PFI reference | Enables accurate, temperature-stable power-fail detection across -40°C to +85°C operating range |
| 100µA quiescent current | Extends battery runtime in portable medical devices, handheld test equipment, and remote sensors |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers with Brownout Resilience |
|---|---|
|
Use Scenario: Handheld multimeter powered by single Li-ion cell (3.0–4.2V) with USB charging and sleep mode. IC Role / Device Role: Supervises main 3.3V rail, asserts RESET if VCC drops below 2.63V during discharge, and triggers PFO-based low-battery alert at 3.2V via PFI divider. Use Value: Prevents corrupted measurements or EEPROM writes during voltage sag; extends usable battery capacity by 12% via precise low-VCC cutoff. |
Use Scenario: PLC I/O module operating in factory environments with fluctuating 24VDC supply and local 3.3V regulation. IC Role / Device Role: Monitors 3.3V logic supply; uses WDI to verify firmware heartbeat; asserts RESET on brownout and PFO to log fault events. Use Value: Eliminates undetected lockups during EMI-induced MCU stalls; reduces field failure rate by >90% vs. discrete RC reset circuits. |
| Embedded Systems with Dual-Supply Operation | Critical µP Power Monitoring in Medical Devices |
|
Use Scenario: IoT gateway supporting both 3.3V battery backup and 5V wall adapter operation. IC Role / Device Role: Provides unified reset timing across supply modes; uses same 200ms tRST and 2.63V threshold regardless of VCC source. Use Value: Removes need for supply-sensing logic or dual reset ICs-reducing BOM count and layout complexity by 30%. |
Use Scenario: Portable ultrasound probe with real-time image processing and nonvolatile parameter storage. IC Role / Device Role: Guarantees RESET assertion down to VCC = 1V during rapid battery depletion; monitors DC-DC converter output with PFI for pre-failure warning. Use Value: Meets IEC 62304 Class C safety requirement for fail-safe shutdown; prevents corrupted DICOM metadata or calibration data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Active-low RESET output; 3.08V reset threshold; identical pinout, watchdog, PFI/PFO functions | Requires inverter or µP with active-low reset input; suited for systems where higher reset threshold avoids nuisance trips on noisy 3.3V rails | Select MAX706TESA+ only if system design mandates active-low reset signaling and tolerates 3.08V trip point. |
| TPS3808G12DBVR | Active-high RESET; 1.2V fixed threshold; no watchdog or PFI; 350ms reset delay; 1.5µA IQ | Lacks watchdog and power-fail monitoring; optimized for ultra-low-power applications where those functions are handled elsewhere | Choose TPS3808G12DBVR only when watchdog and PFI are unnecessary and sub-µA quiescent current is mandatory. |
Compared with MAX706TESA+, MAX706PESA+T provides active-high reset compatibility and lower threshold for earlier intervention; compared with TPS3808G12DBVR, it delivers integrated watchdog and PFI functionality at the cost of higher IQ-making it superior for comprehensive supervision in resource-constrained embedded systems.
Availability
MAX706PESA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controllers, and medical electronics requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX706PESA+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX706 family targets cost-sensitive, space-constrained µP systems needing reliable power supervision-emphasizing low IQ, small footprint (µMAX), and guaranteed operation across wide VCC and temperature ranges.
FAQ
What is the reset threshold voltage of the MAX706PESA+T?
The MAX706PESA+T has a nominal reset threshold of 2.63V with ±1.5% tolerance over temperature. This value is factory-trimmed and specified for VCC falling conditions. It ensures reliable reset assertion before the microprocessor enters undefined operation during brownout or power-up sequencing. The threshold remains stable across the full -40°C to +85°C operating range and is independent of supply voltage slope rate.
Does the MAX706PESA+T include a watchdog timer, and can it be disabled?
Yes, the MAX706PESA+T includes a watchdog timer with a nominal 1.6s timeout period triggered by edges on the WDI pin. Unlike the MAX706AP series, the watchdog function in the MAX706PESA+T cannot be disabled-WDI must be actively toggled within each timeout window to prevent WDO assertion. This design ensures continuous supervision without reliance on software configuration.
What is the function of the PFI and PFO pins on the MAX706PESA+T?
The PFI (Power-Fail Input) pin connects to an external resistive divider to monitor a secondary voltage rail (e.g., unregulated DC input), comparing it against an internal 1.25V reference. When PFI falls below 1.25V, the PFO (Power-Fail Output) pin goes low, enabling early-warning shutdown or µP interrupt. This allows the MAX706PESA+T to supervise multiple rails using a single IC without additional comparators.
Is the MAX706PESA+T compatible with 5V systems?
Yes, the MAX706PESA+T operates across VCC = 2.7V to 5.5V and maintains full specification compliance at 5V. Its RESET output drives high to VCC – 1.5V (min) at 3.2mA sink, and MR input remains TTL/CMOS-compatible. All timing parameters-including 200ms reset delay and 1.6s watchdog timeout-remain valid across the entire supply range, making it suitable for mixed-voltage designs.
What package type does the MAX706PESA+T use, and what are its key mechanical features?
The MAX706PESA+T uses the 8-pin µMAX® package (U8-1), a 3mm × 3mm surface-mount package with exposed thermal pad. It features gull-wing leads, 0.65mm pitch, and RoHS-compliant lead-free finish. The exposed pad improves thermal performance and must be soldered to a PCB thermal plane per Maxim's layout guidelines to ensure reliability under continuous 100µA operation.
MAX706PESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-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:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX706PESA+T FAQ
1.How can I place an order for MAX706PESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706PESA+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 MAX706PESA+T reliable?
The price and inventory of MAX706PESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706PESA+T is usually 5 days.
3.What payment methods are accepted for MAX706PESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706PESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706PESA+T?
MAX706PESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706PESA+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 MAX706PESA+T?
For technical support, including MAX706PESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706PESA+T requirements.
6.How does Aetrix verify that MAX706PESA+T is sourced from the original manufacturer or authorized distributors?
All MAX706PESA+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 MAX706PESA+T meets industry standards.
7.What is the process for return or replacement of MAX706PESA+T?
All MAX706PESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706PESA+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 MAX706PESA+T part is unused and in its original packaging.
Return procedure for MAX706PESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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