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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 MPU
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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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 power-on reset, watchdog timeout (1.6s), 1.25V power-fail detection, and debounced manual reset. It asserts RESET when VCC falls below 3.08V or MR is pulled low, with guaranteed reset assertion down to VCC = 1V and 200ms reset pulse width. Used in battery-powered portable instruments and embedded controllers requiring reliable brownout protection.
For engineers reviewing the MAX706TESA-T datasheet, MAX706TESA-T pinout, MAX706TESA-T application, or MAX706TESA-T equivalent, key selection criteria include its 3.08V reset threshold, SO-8 package, 100µA quiescent current, active-low RESET output, and integrated watchdog timer - all critical for low-power µP monitoring in industrial and portable designs.
Technical Context
The MAX706TESA-T implements a precision voltage monitor with 20mV hysteresis and a dedicated 1.25V reference for PFI-based power-fail warning. Its internal reset generator guarantees logic-low RESET output for VCC ≥ 1V and holds assertion for 200ms after VCC exceeds the 3.08V threshold.
The watchdog circuit monitors WDI transitions and asserts WDO low if no toggle occurs within 1.6s; it resets on RESET assertion and remains enabled unless WDI is left floating or connected to a high-impedance tri-state output (<600nA leakage), per MAX706AT functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable reset initiation for +3.3V systems before brownout |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s nominal; detects firmware hangs without requiring external timing components |
| Quiescent Current | 100µA max at VCC = 3.3V; enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V internal reference; supports adjustable PFI monitoring of auxiliary supplies or battery voltage |
| Operating Voltage Range | 3.15V to 5.5V; compatible with both +3.3V and +5V µP supply rails |
| Temperature Range | -40°C to +85°C; qualified for industrial-grade embedded applications |
Pinout & Package
MAX706TESA-T is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, lead-free compliant, with 1.27mm pitch and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; 500ns minimum pulse width at VCC = 3.3V; internally pulled up with ~70µA source |
| 2 VCC | Positive supply input | Accepts 3.15V–5.5V; powers all internal circuits including reset generator and comparator |
| 3 GND | Ground reference | Common return path for RESET, WDO, PFO, and internal reference |
| 4 PFI | Power-fail comparator input | Monitors external voltage divider; triggers PFO when input falls below 1.25V |
| 5 PFO | Active-low power-fail output | Open-drain output sinking current when PFI < 1.25V; used for early-warning interrupts |
| 6 WDI | Watchdog input | Edge-sensitive; toggling required every 1.6s to prevent WDO assertion; disables when floating |
| 7 RESET | Active-low reset output | Guaranteed low for VCC ≥ 1V; held low for 200ms after VCC rises above 3.08V |
| 8 WDO | Active-low watchdog output | Asserts low on watchdog timeout or VCC brownout; deasserts immediately when VCC recovers |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing µP runaway |
| WDI disable on high-impedance state | Eliminates unintended watchdog triggering when µP is in sleep or tri-state I/O mode |
| 200ms reset time delay | Meets common µP power-up timing requirements without external RC networks |
| 1.25V precision PFI reference | Enables accurate low-battery detection or unregulated supply monitoring via resistive divider |
| Debounced MR input | Rejects mechanical switch bounce; eliminates need for external debounce circuitry |
Applications
| Battery-Powered Portable Instruments | Industrial Embedded Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by 3.7V Li-ion battery with AC adapter backup. IC Role / Device Role / Timing Role: Supervises main +3.3V rail and monitors battery voltage via PFI to trigger orderly shutdown before cutoff. Use Value: Prevents data corruption during battery depletion using 1.25V reference and 3.08V reset threshold aligned with µP VDD min spec. |
Use Scenario: PLC I/O module operating in factory environment with noisy 24V DC supply converted to +3.3V. IC Role / Device Role / Timing Role: Provides power-on reset, brownout recovery, and firmware watchdog supervision for ARM Cortex-M4 core. Use Value: 200ms reset pulse ensures full peripheral initialization; 100µA quiescent current minimizes standby loss. |
| Computers & Peripherals | Critical µP Power Monitoring |
Use Scenario: USB-powered docking station with multiple voltage rails and hot-plug detection. IC Role / Device Role / Timing Role: Monitors +3.3V system rail and asserts RESET on undervoltage; uses WDO to signal NMI on firmware lockup. Use Value: Active-low RESET and WDO outputs interface directly with standard µP reset/NMI pins without level-shifting. |
Use Scenario: Medical infusion pump requiring fail-safe startup and runtime integrity checks. IC Role / Device Role / Timing Role: Dual-role supervisor: initiates safe boot sequence and continuously validates µP responsiveness via WDI. Use Value: Watchdog timeout (1.6s) matches safety-critical task scheduling; guaranteed RESET to VCC = 1V prevents partial execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SESA | 2.93V reset threshold; otherwise identical pinout, features, and SO-8 package | Suitable where system VDD tolerance requires earlier reset assertion (e.g., 3.0V nominal rails) | Select when design margin demands reset at 2.93V instead of 3.08V |
| MAX706RCSA | 2.63V reset threshold; commercial temperature range (0°C to +70°C); same SO-8 footprint | Used in cost-sensitive consumer electronics with wider VDD operating margins | Choose for non-industrial applications where lower reset voltage and ambient temp range suffice |
Compared with MAX706TESA-T, MAX706SESA offers earlier reset activation for tighter 3.0V rail systems, while MAX706RCSA provides broader voltage margin and reduced temperature qualification - both retain identical watchdog, PFI, and MR functionality in pin-compatible SO-8 packages.
Availability
MAX706TESA-T is available at Aetrix Electronics and suitable for battery-powered equipment, industrial embedded controllers, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
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 analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX706 family was designed specifically for low-cost, high-reliability microprocessor supervision in space-constrained +3V/+3.3V systems - emphasizing precision reset thresholds, ultra-low quiescent current, and integrated watchdog functionality.
FAQ
What is the reset threshold voltage for MAX706TESA-T?
The MAX706TESA-T has a precise reset threshold of 3.08V (VCC falling), with ±1.5% tolerance over temperature. This value is factory-trimmed and guaranteed across the -40°C to +85°C operating range. The device asserts active-low RESET when VCC drops below this threshold and holds it for 200ms after VCC rises above it. This specification makes MAX706TESA-T ideal for +3.3V systems where robust brownout detection is required.
Does MAX706TESA-T include a watchdog timer function?
Yes, MAX706TESA-T includes a fully integrated watchdog timer with a nominal 1.6s timeout period. It monitors the WDI pin for edges and asserts the active-low WDO output if no transition occurs within that window. Unlike basic reset supervisors, MAX706TESA-T also supports WDI disable when left floating or connected to a high-impedance tri-state output (<600nA leakage), making it suitable for low-power sleep modes. This functionality is confirmed in the MAX706AT variant documentation.
What package type is used for MAX706TESA-T?
MAX706TESA-T is supplied in an 8-pin SO (Small Outline) package, designated S8-2 per Maxim's ordering guide. It is surface-mount, lead-free, and complies with JEDEC MS-012AC dimensions (4.9mm × 3.9mm, 1.27mm pitch). This package is pin-compatible with other MAX706x variants in SO-8, enabling drop-in replacement across reset threshold options without PCB redesign.
Can MAX706TESA-T monitor a secondary power supply?
Yes, MAX706TESA-T can monitor a secondary supply using its PFI (Power-Fail Input) pin and internal 1.25V reference. By connecting PFI to a resistive divider from the auxiliary rail, the device asserts active-low PFO when the divided voltage falls below 1.25V - enabling early-warning detection for low-battery conditions or unregulated DC supply dropout. This function operates independently of the main VCC reset monitoring.
What is the quiescent current consumption of MAX706TESA-T?
MAX706TESA-T draws a maximum of 100µA quiescent current at VCC = 3.3V and TA = +25°C, with typical consumption near 50µA. This ultra-low supply current is specified across the full -40°C to +85°C temperature range and supports extended battery life in portable applications. The value is verified in the Electrical Characteristics table under "Supply Current (ISUPPLY)" for MAX70_T/MAX706AT devices.
MAX706TESA-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:
- 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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