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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 MPU
- Quantity:
- Payment:
- Shipping:
Inventory:3,022
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Product details
Overview
MAX706SESA-T from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing power-on reset, watchdog timeout (1.6s), 1.25V power-fail detection, and debounced manual reset. It features a 3.08V reset threshold, 200ms reset pulse width, and 100µA quiescent current-enabling reliable µP startup and brownout recovery in battery-powered portable instruments.
For engineers reviewing the MAX706SESA-T datasheet, MAX706SESA-T pinout, MAX706SESA-T application, or MAX706SESA-T equivalent, this device serves as a precision voltage monitor and system health guardian in space-constrained industrial controllers and embedded computing platforms requiring stable low-voltage supervision with minimal external components.
Technical Context
The MAX706SESA-T integrates a precision bandgap reference, comparator-based reset generator with hysteresis (20mV), and a monostable watchdog timer triggered by WDI transitions. Its internal 70µA MR pull-up enables direct pushbutton interfacing without external biasing.
It operates across VCC = 3.15V to 5.5V, guarantees RESET assertion down to VCC = 1V, and delivers TTL/CMOS-compatible outputs with defined VOH/VOL across supply ranges-ensuring robust interface with modern low-voltage µPs and FPGAs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reset assertion before 3.3V µP supply dropout |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±0.65s; detects firmware hangs while allowing normal software servicing intervals |
| Quiescent Current | 100µA max at VCC = 3.3V; enables multi-year operation in battery-backed applications |
| Power-Fail Threshold | 1.25V internal reference; supports adjustable PFI monitoring of unregulated rails or battery voltage |
| Supply Range | 3.15V to 5.5V; compatible with both 3.3V and 5V system domains without level-shifting |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded deployment |
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 footprint requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA; triggers 200ms reset pulse when pulled below 0.6V |
| 2 VCC | Positive supply input | Accepts 3.15V–5.5V; powers all internal circuits and defines reset threshold reference |
| 3 GND | Ground reference | Return path for all analog and digital functions; must be low-impedance for noise immunity |
| 4 PFI | Power-fail comparator input | Monitors external voltage divider; asserts PFO when input falls below 1.25V |
| 5 PFO | Active-low power-fail output | Open-drain output sinking ≥1.2mA; used for early-warning interrupts or cascaded reset initiation |
| 6 WDI | Watchdog input | Edge-sensitive; requires transition within 1.6s to prevent WDO assertion; high-impedance disables watchdog in MAX706A variants (not applicable here) |
| 7 RESET | Active-low reset output | Pulled low during power-up, brownout, or MR assertion; remains low for 200ms after recovery |
| 8 WDO | Active-low watchdog output | Asserts independently of RESET when WDI timeout occurs; also asserts on VCC dropout |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing undefined µP states |
| Debounced manual reset input | 140ms minimum pulse width eliminates mechanical switch bounce without external RC |
| 1.25V precision PFI reference | Enables accurate low-battery warning or auxiliary rail monitoring with <±1% tolerance |
| 20mV reset threshold hysteresis | Prevents oscillatory reset assertion near trip point under noisy or slowly decaying supply conditions |
| Watchdog timeout disable not supported | WDI function is always enabled-no risk of accidental watchdog deactivation in safety-critical contexts |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers |
|---|---|
Use Scenario: Handheld multimeter operating from single 3.3V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and monitors battery voltage via PFI divider; asserts RESET on brownout and PFO on low-battery warning. Use Value: Prevents corrupted measurements during low-voltage operation and triggers graceful shutdown before battery depletion. |
Use Scenario: PLC I/O module powered from isolated 3.3V DC-DC converter with field-side voltage monitoring. IC Role / Device Role / Timing Role: Provides power-on reset sequencing and watchdog supervision of real-time control firmware; PFO monitors auxiliary 12V field power. Use Value: Eliminates need for discrete reset ICs and external comparators-reducing BOM count and board area by >40%. |
| Embedded Computing Platforms | Critical µP Power Monitoring |
Use Scenario: RISC-V SoM with dual-supply (3.3V core, 5V I/O) and thermal management MCU. IC Role / Device Role / Timing Role: Monitors 3.3V domain with 3.08V threshold; WDO feeds NMI input to trigger firmware diagnostics on hang detection. Use Value: Enables autonomous fault recovery without host intervention-meeting IEC 61508 SIL-2 functional safety requirements. |
Use Scenario: Medical infusion pump controller requiring fail-safe power sequencing and watchdog enforcement. IC Role / Device Role / Timing Role: Generates guaranteed-reset signal during power ramp-up and maintains supervision throughout operation; RESET asserted until VCC stabilizes above 3.08V for ≥200ms. Use Value: Meets FDA Class II device requirements for deterministic power-up behavior and runtime fault detection. |
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 and functionality, but in 8-pin PDIP package | Through-hole assembly; less suitable for automated SMT production | Select for prototyping, legacy repair, or mixed-technology boards where SO placement is impractical |
| TPS3808G30DBVR | 3.0V reset threshold (±0.5%), 200ms delay, no watchdog or PFI; 1.5µA IQ | Lacks watchdog and power-fail comparator-requires external circuitry for full MAX706SESA-T feature set | Choose only if watchdog and PFI are unused and ultra-low quiescent current is critical |
Compared with MAX706TEPA, MAX706SESA-T offers superior manufacturability in SMT lines; compared with TPS3808G30DBVR, it delivers integrated watchdog and PFI functionality-reducing total component count and design validation effort for complex supervision needs.
Availability
MAX706SESA-T is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, and embedded computing platforms requiring stable component supply across extended temperature ranges and long product 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX706 family delivers cost-effective, highly integrated µP supervisory functions-including reset generation, watchdog timing, and power-fail detection-for compact, low-power embedded systems.
FAQ
What is the reset threshold voltage for MAX706SESA-T?
The MAX706SESA-T has a fixed reset threshold of 3.08V (typical) with ±75mV tolerance over temperature. This value is specified for VCC falling conditions and includes 20mV hysteresis to prevent chatter near the trip point. The threshold is factory-trimmed and does not require external calibration. MAX706SESA-T guarantees RESET assertion down to VCC = 1V, ensuring reliable operation even during severe brownout events.
Does MAX706SESA-T include a watchdog timer, and what is its timeout period?
Yes, MAX706SESA-T includes a watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on any edge transition at the WDI pin and asserts the WDO output low if no transition occurs within that window. Unlike MAX706A variants, the watchdog function in MAX706SESA-T cannot be disabled-it remains active whenever VCC is within specification. WDO also asserts immediately upon VCC dropping below the 3.08V reset threshold.
Can MAX706SESA-T monitor a secondary power supply such as a battery or unregulated rail?
Yes, MAX706SESA-T supports secondary supply monitoring via its PFI (Power-Fail Input) pin, which compares an external voltage against an internal 1.25V reference. By connecting PFI to a resistive divider from the monitored rail, users can configure early-warning detection for battery depletion or auxiliary supply failure. The resulting PFO output is active-low and open-drain, enabling direct connection to µP interrupt inputs or cascaded reset logic without additional components.
What package type and footprint does MAX706SESA-T use?
MAX706SESA-T is supplied in an 8-pin SO (Small Outline) package with JEDEC MS-012AC outline (S8-2 code), featuring 1.27mm lead pitch and gull-wing leads. It is RoHS-compliant and compatible with standard reflow soldering profiles. The package measures 4.9mm × 6.0mm with 1.75mm maximum height, supporting high-density PCB layouts in space-constrained portable and industrial applications.
How does the manual reset (MR) input function on MAX706SESA-T?
The MR input on MAX706SESA-T is an active-low, TTL/CMOS-compatible pin internally pulled up with a 70µA current source. Pulling MR below 0.6V (for VCC < 3.6V) initiates a 200ms reset pulse on the RESET output. The input accepts minimum pulse widths of 500ns at 3.3V and 150ns at 5V, and its built-in debounce eliminates need for external filtering. When unused, MR should be left unconnected or tied to VCC-never floated.
MAX706SESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- 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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