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Analog Devices Inc./Maxim Integrated MAX706TESA+T
- Part No.:
- MAX706TESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706TESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,592
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Product details
Overview
MAX706TESA+T from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing reset generation during power-up/down/brownout (200ms delay), watchdog timeout (1.6s), 1.25V power-fail comparator input, and debounced manual-reset input. It operates over –40°C to +85°C and is used in battery-powered portable instruments and embedded controllers requiring reliable power monitoring.
For engineers reviewing the MAX706TESA+T datasheet, MAX706TESA+T pinout, MAX706TESA+T application, or MAX706TESA+T equivalent, this page delivers verified functional identity, exact reset threshold (3.08V), watchdog behavior, package mapping (8-pin SO), and validated alternatives - all confirmed against Maxim's official documentation.
Technical Context
The MAX706TESA+T implements a precision voltage-monitoring architecture with a fixed 3.08V reset threshold (±1.5% tolerance) and 20mV hysteresis, guaranteeing RESET assertion down to VCC = 1V. Its internal watchdog timer resets on WDI transitions and asserts WDO low after 1.6s (±40%) if no toggle occurs.
It integrates four independent functions: power-on reset generator, watchdog monitor, 1.25V reference-based PFI comparator (for power-fail/low-battery detection), and TTL/CMOS-compatible MR input with 500ns minimum pulse width at VCC = 3V. The device lacks watchdog disable capability - unlike MAX706AT variants - and provides only active-low RESET output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable reset assertion for +3.3V µP systems before brownout |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±40%; detects firmware hangs without requiring external timing components |
| Supply Current | 100µA max at VCC = 3.3V; enables long battery life in portable equipment |
| PFI Threshold | 1.25V ±40mV; supports configurable power-fail warning via external resistor divider |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded applications |
| Package | 8-pin SO (S8-2); surface-mount compatible with standard reflow profiles |
Pinout & Package
MAX706TESA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package per package code S8-2, with gull-wing leads, JEDEC MS-012AC compliant footprint, and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA current; triggers 200ms reset pulse when pulled below 0.6V |
| 2 VCC | Positive supply input | Accepts 3.15V to 5.5V; guarantees RESET assertion down to VCC = 1V |
| 3 GND | Ground reference | Common return path for all internal circuits and outputs |
| 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 interrupt or cascaded reset initiation |
| 6 WDI | Watchdog input | Edge-sensitive; requires transition every 1.6s to prevent WDO assertion; no disable function |
| 7 RESET | Active-low reset output | PuLL-type output; sinks ≥1.2mA at VCC = 3.3V; held low for 200ms after VCC exceeds 3.08V |
| 8 WDO | Active-low watchdog output | Open-drain; asserts low on watchdog timeout or VCC brownout; deasserts immediately upon VCC recovery |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset state even during deep brownout conditions |
| Debounced MR input with 500ns min pulse width | Eliminates need for external RC debounce circuitry in pushbutton interfaces |
| 1.25V precision PFI reference | Enables accurate low-battery detection or auxiliary supply monitoring without external reference |
| 200ms factory-trimmed reset delay | Removes requirement for external timing capacitor; improves BOM simplicity and reliability |
| 100µA quiescent current | Supports multi-year operation in coin-cell–powered IoT sensors and portable instrumentation |
Applications
| Battery-Powered Portable Instruments | Industrial Embedded Controllers |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by 3.3V Li-ion batteries with variable discharge profiles. IC Role / Device Role / Timing Role: Supervisory IC monitoring main VCC and triggering controlled shutdown before critical brownout. Use Value: Prevents corrupted EEPROM writes and flash programming errors during low-voltage operation using guaranteed 3.08V reset threshold and 200ms hold time. |
Use Scenario: Programmable logic controllers (PLCs) operating in factory environments with noisy 3.3V rails. IC Role / Device Role / Timing Role: System-level reset supervisor with watchdog monitoring of firmware execution. Use Value: Detects software lockups via 1.6s watchdog timeout and initiates safe state recovery without host CPU intervention. |
| Computers & Peripherals | Intelligent Power Management Systems |
Use Scenario: USB-powered embedded computers with dual-supply capability (3.3V battery / 5V adapter). IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean boot sequence regardless of supply source. Use Value: Maintains identical 3.08V reset threshold across both 3.3V and 5V operation, eliminating supply-dependent configuration. |
Use Scenario: Smart battery packs with integrated fuel gauging and protection circuitry. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors pack voltage (via PFI divider) and asserts PFO for low-battery interrupt. Use Value: Uses internal 1.25V reference to generate precise low-Vbat warning at user-defined thresholds, reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TCSA | Same 3.08V reset threshold, same SO-8 package, but rated for 0°C to +70°C commercial temp range | Not suitable for extended industrial temperature deployments where –40°C startup is required | Select MAX706TESA+T for designs needing full –40°C to +85°C qualification; use MAX706TCSA only for cost-sensitive commercial applications. |
| TPS3808G33DBVR | 3.3V reset threshold (±0.5%), 350ms reset delay, no integrated watchdog, lower 12µA quiescent current | Lacks watchdog functionality and PFI comparator; requires external components for power-fail detection | Choose TPS3808G33DBVR only when watchdog and PFI features are unnecessary and ultra-low IQ is critical. |
Compared with MAX706TCSA, MAX706TESA+T adds industrial temperature support without altering pinout or electrical behavior; compared with TPS3808G33DBVR, it delivers integrated watchdog and PFI functions at higher quiescent current but eliminates design complexity from discrete supervision circuits.
Availability
MAX706TESA+T is available at Aetrix Electronics and suitable for battery-powered equipment, portable instruments, and industrial embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX706TESA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX706 family was engineered specifically for low-cost, highly integrated microprocessor supervision in space- and power-constrained embedded systems, emphasizing precision voltage monitoring and robust reset timing without external components.
FAQ
What is the reset threshold voltage of the MAX706TESA+T?
The MAX706TESA+T has a factory-trimmed reset threshold of 3.08V (±1.5%) for VCC falling conditions. This value is specified in the Electrical Characteristics table under "Reset Threshold (VCC Falling)" and applies across its full –40°C to +85°C operating range. The device guarantees RESET assertion down to VCC = 1V, making it suitable for deep brownout detection in 3.3V systems.
Does the MAX706TESA+T include a watchdog timer?
Yes, the MAX706TESA+T includes a watchdog timer with a nominal timeout period of 1.6s (±40%). It monitors the WDI pin for transitions and asserts the WDO output low if no edge occurs within that window. Unlike MAX706AT variants, the watchdog function in MAX706TESA+T cannot be disabled - leaving WDI open or floating will cause continuous WDO assertion.
What is the function of the PFI and PFO pins on the MAX706TESA+T?
The PFI (Power-Fail Input) pin connects to an external resistive divider to monitor auxiliary voltages; it compares the applied voltage against an internal 1.25V reference. When PFI falls below 1.25V, the PFO (Power-Fail Output) pin - an active-low open-drain output - pulls low to signal impending power loss or low battery condition, enabling orderly shutdown or interrupt handling in the host µP.
Can the MAX706TESA+T operate from a 3.3V supply?
Yes, the MAX706TESA+T is fully specified for operation from 3.15V to 5.5V, including standard 3.3V supplies. Its reset threshold remains fixed at 3.08V, ensuring compatibility with 3.3V µPs. Electrical characteristics such as supply current (100µA max), output drive strength, and MR pulse width are all validated at VCC = 3.3V per the datasheet's test conditions.
What package type is used for the MAX706TESA+T?
The MAX706TESA+T uses an 8-pin SOIC (Small Outline Integrated Circuit) package with package code S8-2, measuring 3.9mm × 4.9mm with 1.27mm lead pitch. It is RoHS-compliant and lead-free, and matches industry-standard SO-8 footprints for seamless PCB integration and automated assembly.
MAX706TESA+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:
- 3.08V
- 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
MAX706TESA+T FAQ
1.How can I place an order for MAX706TESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TESA+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 MAX706TESA+T reliable?
The price and inventory of MAX706TESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TESA+T is usually 5 days.
3.What payment methods are accepted for MAX706TESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TESA+T?
MAX706TESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TESA+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 MAX706TESA+T?
For technical support, including MAX706TESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TESA+T requirements.
6.How does Aetrix verify that MAX706TESA+T is sourced from the original manufacturer or authorized distributors?
All MAX706TESA+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 MAX706TESA+T meets industry standards.
7.What is the process for return or replacement of MAX706TESA+T?
All MAX706TESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TESA+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 MAX706TESA+T part is unused and in its original packaging.
Return procedure for MAX706TESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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