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Analog Devices Inc./Maxim Integrated MAX706SESA+T
- Part No.:
- MAX706SESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706SESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,912
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Product details
Overview
MAX706SESA+T from Maxim Integrated is an active-low reset supervisory IC for +3V microprocessor systems, featuring 2.93V reset threshold, 200ms reset pulse width, 1.25V power-fail comparator input, watchdog timer with 1.6s timeout, and manual reset input - used in portable instruments and battery-powered controllers to ensure reliable power-up sequencing and brownout recovery.
For engineers reviewing the MAX706SESA+T datasheet, MAX706SESA+T pinout, MAX706SESA+T application, or MAX706SESA+T equivalent, this page delivers verified functional identity, exact SO-8 package mapping, confirmed watchdog and reset timing behavior, and validated alternative options for industrial embedded designs requiring stable low-voltage supervision.
Technical Context
The MAX706SESA+T implements a precision voltage monitor with hysteresis (20mV), a monostable reset generator triggered by VCC drop below 2.93V or MR assertion, and a transition-sensitive watchdog timer reset on WDI edge within 1.6s. Its PFI comparator uses an internal 1.25V reference to support external undervoltage detection independent of VCC.
It operates across -40°C to +85°C with guaranteed RESET assertion down to VCC = 1V, draws only 100µA quiescent current, and features TTL/CMOS-compatible MR input with debounced 500ns minimum pulse width at 3V supply - enabling robust integration into space-constrained +3.3V embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); ensures reset assertion before 3.3V µP enters unstable operating region |
| Reset Pulse Width | 200ms typical; guarantees sufficient hold time for full µP initialization after power stabilization |
| Watchdog Timeout | 1.6s nominal; provides deterministic firmware hang detection without external timing components |
| Quiescent Current | 100µA max; enables multi-year operation in battery-backed monitoring applications |
| PFI Threshold | 1.25V ±50mV; supports accurate power-fail warning via external resistor divider |
| Operating Temp Range | -40°C to +85°C; qualified for industrial-grade embedded controller environments |
| Supply Voltage Range | 3.0V to 5.5V; compatible with both +3.3V logic rails and legacy +5V system backplanes |
Pinout & Package
MAX706SESA+T is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount compatible with standard reflow profiles and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA source; triggers 200ms reset pulse when pulled ≤0.6V |
| 2 VCC | Positive supply input | Accepts 3.0V–5.5V; powers all internal comparators, timer, and outputs |
| 3 GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance |
| 4 PFI | Power-fail comparator input | Monitors external voltage via resistive divider; asserts PFO when input falls below 1.25V |
| 5 PFO | Active-low power-fail output | Open-drain output sinks current when PFI < 1.25V; used for early-warning interrupt or MR triggering |
| 6 WDI | Watchdog input | Edge-triggered; requires rising/falling transition every 1.6s to prevent WDO assertion |
| 7 RESET | Active-low reset output | Push-pull output; held low during VCC < 2.93V or MR assertion, then held low for 200ms post-recovery |
| 8 WDO | Active-low watchdog output | Push-pull output; goes low if WDI idle >1.6s or VCC drops below reset threshold; resets on WDI edge |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures fail-safe reset even during deep brownout conditions where other supervisors lose output drive |
| Debounced MR input with 500ns min pulse width | Eliminates need for external RC debounce circuitry in pushbutton interfaces |
| WDI disable on high-impedance state | Allows watchdog to be safely disabled when µP enters low-power sleep mode with tri-stated I/O |
| 1.25V precision PFI reference with 10mV hysteresis | Prevents chatter on PFO during noisy or slowly decaying supply transitions |
| 200ms factory-trimmed reset delay | Removes dependency on external capacitor timing, improving production yield and temperature stability |
Applications
| Battery-Powered Portable Instruments | Industrial Microcontroller Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA cells with automatic shutdown on low battery. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail and battery voltage via PFI divider; asserts RESET on brownout and PFO on low-battery warning. Use Value: Prevents corrupted EEPROM writes during voltage collapse and enables graceful shutdown sequence initiated by PFO interrupt. |
Use Scenario: PLC I/O module with isolated 3.3V logic supply and field-side 24V power monitoring. IC Role / Device Role / Timing Role: Resets microcontroller on 3.3V rail dropout; uses PFI to detect 24V field supply failure via resistive scaling. Use Value: Maintains deterministic fault response across dual-supply domains without adding discrete comparators or timers. |
| Embedded Computing Systems | Critical µP Power Monitoring |
Use Scenario: Fanless edge gateway booting Linux from SPI flash with watchdog-enforced firmware health check. IC Role / Device Role / Timing Role: Generates power-on reset; feeds WDI with periodic GPIO toggle; asserts WDO on software lockup. Use Value: Enables autonomous recovery from frozen application threads without host intervention or external watchdog IC. |
Use Scenario: Medical sensor node requiring fail-safe reset under rapid AC-DC adapter disconnect events. IC Role / Device Role / Timing Role: Monitors 3.3V supply with 2.93V threshold; guarantees RESET remains asserted until VCC ≥3.0V for 200ms. Use Value: Eliminates risk of partial register initialization or metastable I/O states during marginal power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TEPA | Same 3.08V reset threshold, PDIP-8 package, 0°C to +70°C temp range | Lacks extended industrial temperature rating; through-hole mounting only | Select for cost-sensitive, non-industrial prototypes where SO-8 reflow is unavailable |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms delay, but no PFI/PFO or watchdog functionality | Single-purpose reset IC; cannot replace MAX706SESA+T's integrated power-fail and watchdog features | Choose only if design requires basic reset only and can implement PFI/WDT externally |
Compared with MAX706TEPA and TPS3808G33DBVR, MAX706SESA+T uniquely combines industrial temperature range, SO-8 footprint, active-low reset, watchdog timer, and power-fail comparator in one device - eliminating three discrete functions and reducing BOM count in compact µP systems.
Availability
MAX706SESA+T is available at Aetrix Electronics and suitable for battery-powered equipment, portable instruments, and industrial microcontroller controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX706SESA+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 industrial, automotive, and communications applications, with emphasis on power management and reliability-critical functions.
The MAX706 family was engineered specifically for low-voltage microprocessor supervision in portable and embedded systems, integrating reset generation, watchdog timing, and auxiliary voltage monitoring into a single 8-pin package.
FAQ
What is the reset threshold voltage of the MAX706SESA+T?
The MAX706SESA+T has a factory-trimmed reset threshold of 2.93V (VCC falling), with ±70mV tolerance over temperature and supply. This value is specified in the Electrical Characteristics table and ensures reliable reset assertion before a 3.3V microprocessor exits its valid operating range. The MAX706SESA+T maintains this threshold across its full -40°C to +85°C operating range.
Does the MAX706SESA+T include a watchdog timer?
Yes, the MAX706SESA+T includes a watchdog timer with a nominal timeout period of 1.6 seconds. It monitors the WDI pin for edges and asserts the WDO output low if no transition occurs within that window. Unlike some variants, the MAX706SESA+T watchdog cannot be disabled - it remains active whenever VCC is within specification.
What is the function of the PFI and PFO pins on the MAX706SESA+T?
The PFI (Power-Fail Input) pin connects to an external resistive divider to monitor a secondary voltage rail; it compares against an internal 1.25V reference. When PFI falls below that threshold, the PFO (Power-Fail Output) pin goes active-low. This allows the MAX706SESA+T to generate early warnings for supply droop or low-battery conditions independent of the main VCC rail.
Can the MAX706SESA+T operate from a 3.3V supply?
Yes, the MAX706SESA+T is fully specified for operation from 3.0V to 5.5V, making it ideal for +3.3V systems. At 3.3V, it delivers guaranteed RESET output drive, 200ms reset pulse width, and correct WDI/PFI threshold behavior. Its 100µA quiescent current also minimizes load on battery-powered 3.3V rails.
What package type is used for the MAX706SESA+T?
The MAX706SESA+T is supplied in an 8-pin SO (Small Outline) package with S8-2 footprint, lead-free and RoHS-compliant. This surface-mount package supports automated assembly and meets IPC-7351 standards for thermal and mechanical reliability in industrial environments.
MAX706SESA+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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX706SESA+T FAQ
1.How can I place an order for MAX706SESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706SESA+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 MAX706SESA+T reliable?
The price and inventory of MAX706SESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706SESA+T is usually 5 days.
3.What payment methods are accepted for MAX706SESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706SESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706SESA+T?
MAX706SESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706SESA+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 MAX706SESA+T?
For technical support, including MAX706SESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706SESA+T requirements.
6.How does Aetrix verify that MAX706SESA+T is sourced from the original manufacturer or authorized distributors?
All MAX706SESA+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 MAX706SESA+T meets industry standards.
7.What is the process for return or replacement of MAX706SESA+T?
All MAX706SESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706SESA+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 MAX706SESA+T part is unused and in its original packaging.
Return procedure for MAX706SESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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