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Analog Devices Inc./Maxim Integrated MAX706TEUA+T
- Part No.:
- MAX706TEUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX706TEUA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
MAX706TEUA+T from Maxim Integrated is an active-low microprocessor supervisory circuit in 8-pin µMAX package, providing reset generation (200ms delay), watchdog timeout (1.6s), 1.25V power-fail comparator input, and debounced manual-reset input - all optimized for +3V/+3.3V systems in battery-powered portable instruments and industrial controllers.
For engineers reviewing the MAX706TEUA+T datasheet, MAX706TEUA+T pinout, MAX706TEUA+T application, or MAX706TEUA+T equivalent, this device delivers precision voltage monitoring (3.08V reset threshold), low-quiescent-current operation (100µA), and guaranteed RESET assertion down to VCC = 1V - critical for reliable power-up sequencing and brownout recovery in embedded µP systems.
Technical Context
The MAX706TEUA+T implements a dedicated reset generator with internal 200ms timer and hysteresis (20mV), a 1.6s watchdog timer that resets on WDI transitions and disables when WDI is open/high-Z (per MAX706AT specification), and a standalone 1.25V reference-based power-fail comparator feeding PFO. Its reset output asserts low when VCC falls below 3.08V or MR is pulled low.
All logic inputs (MR, WDI, PFI) are TTL/CMOS-compatible across 3.0V–5.5V VCC range; RESET output is guaranteed functional down to VCC = 1V, and supply current remains ≤100µA over temperature (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable reset assertion before µP supply dropout in +3.3V systems |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±0.65s; detects µP lockup without requiring external timing components |
| Supply Current | 100µA max at VCC = 5.5V; enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V ±0.05V; supports accurate low-battery warning or auxiliary supply monitoring via resistive divider |
| Operating Temperature | −40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Package | 8-pin µMAX (U8-1); 3mm × 3mm surface-mount footprint with exposed pad for thermal performance |
Pinout & Package
MAX706TEUA+T uses the 8-pin µMAX package (U8-1), a compact 3mm × 3mm surface-mount outline with exposed thermal pad. Pin numbering follows standard µMAX top-view orientation (pin 1 at top-left corner, counterclockwise).
| 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 |
| 2 (VCC) | Positive supply input | Operates from 3.15V to 5.5V; RESET asserted down to VCC = 1V |
| 3 (GND) | Ground reference | Common return for all internal circuits and outputs |
| 4 (PFI) | Power-fail comparator input | Compares against internal 1.25V reference; accepts resistive divider for custom trip points |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; used for early-warning interrupt or cascaded reset |
| 6 (WDI) | Watchdog input | Edge-sensitive; toggling within 1.6s prevents WDO assertion; disables when open or high-Z |
| 7 (WDO) | Active-low watchdog output | Asserts low on timeout or VCC brownout; deasserts immediately upon VCC recovery |
| 8 (RESET) | Active-low reset output | Guaranteed low during power-up/brownout; holds low for 200ms after VCC exceeds 3.08V |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset state even during deep brownout or partial power loss |
| WDI disable on high-impedance state | Eliminates false watchdog timeouts when µP enters sleep or tri-state I/O modes |
| Debounced MR input with 140ms minimum pulse | Removes mechanical switch bounce without external RC network |
| 1.25V precision reference for PFI | Enables accurate, stable power-fail detection independent of VCC variation |
| 20mV reset threshold hysteresis | Prevents oscillation during slow VCC ramp-up or noisy supply conditions |
Applications
| Battery-Powered Portable Instruments | Industrial Microcontroller Controllers |
|---|---|
Use Scenario: Handheld test meters powered by single Li-ion or dual alkaline cells with variable discharge profile. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail and triggers reset if voltage drops below 3.08V; PFI senses unregulated battery voltage for low-battery warning. Use Value: Prevents corrupted memory writes and erratic behavior during battery depletion while enabling graceful shutdown via PFO interrupt. |
Use Scenario: Programmable logic controller (PLC) I/O module operating in factory environments with fluctuating 24V DC input. IC Role / Device Role / Timing Role: Resets ARM Cortex-M4 microcontroller on 3.3V rail brownout; WDO monitors firmware execution integrity. Use Value: Guarantees system restart after transient power dips and detects firmware hangs without adding software overhead. |
| Embedded Computing Systems | Critical µP Power Monitoring |
Use Scenario: Fanless edge gateway using 3.3V SoM with USB and Ethernet interfaces. IC Role / Device Role / Timing Role: Generates clean 200ms reset pulse on power-up; MR allows remote reset via GPIO-controlled transistor. Use Value: Eliminates need for discrete RC reset circuit, reducing BOM count and improving timing consistency across production units. |
Use Scenario: Medical diagnostic device requiring fail-safe boot sequence compliance per IEC 62304. IC Role / Device Role / Timing Role: Provides hardware-enforced reset supervision with documented 3.08V threshold and 200ms delay. Use Value: Meets Class C safety requirements by ensuring µP never executes code outside valid supply range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SEUA+T | 2.93V reset threshold; otherwise identical functionality and pinout | Suitable for systems with tighter 3.0V nominal supply tolerance where 3.08V may cause premature reset | Select when VCC nominal is 3.0V and margin to 3.08V threshold is insufficient |
| MAX706REUA+T | 2.63V reset threshold; same package, temp range, and feature set | Used in +3V systems with higher supply ripple or lower dropout headroom | Choose for legacy 3.0V designs or where brownout immunity must extend deeper into discharge curve |
Compared with MAX706TEUA+T, the MAX706SEUA+T offers earlier reset assertion for marginal 3.0V supplies, while the MAX706REUA+T provides maximum brownout depth tolerance - all three share identical watchdog, PFI/PFO, and MR behavior, enabling direct substitution with only threshold adjustment.
Availability
MAX706TEUA+T is available at Aetrix Electronics and suitable for battery-powered equipment, portable instruments, and industrial controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX706TEUA+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, automotive, and communications markets.
The MAX706 family was designed specifically for cost-sensitive, space-constrained microprocessor systems needing integrated reset, watchdog, and power-fail monitoring - targeting portable, medical, and industrial embedded applications.
FAQ
What is the reset threshold voltage for MAX706TEUA+T?
The MAX706TEUA+T has a fixed reset threshold of 3.08V (typical) with ±75mV tolerance, specified for VCC falling conditions. This value is laser-trimmed at wafer test and guaranteed over −40°C to +85°C. The threshold applies to both power-up and brownout detection, and the device guarantees RESET assertion down to VCC = 1V.
Does MAX706TEUA+T include a watchdog timer function?
Yes, the MAX706TEUA+T includes a watchdog timer with a nominal timeout period of 1.6s. It monitors the WDI pin for transitions and asserts WDO low if no edge occurs within that window. The watchdog automatically disables when WDI is left open or driven high-impedance, per MAX706AT specifications confirmed in the datasheet.
What package type and footprint does MAX706TEUA+T use?
The MAX706TEUA+T is supplied in the 8-pin µMAX package (package code U8-1), measuring 3mm × 3mm with an exposed thermal pad. It is a surface-mount device compatible with standard reflow profiles and offers the smallest footprint among MAX706 variants - smaller than SO-8 and PDIP packages.
Can MAX706TEUA+T monitor a secondary power supply like +12V?
Yes, MAX706TEUA+T can monitor auxiliary supplies such as +12V using its PFI input. By connecting PFI to a resistive divider referenced to the target supply, the internal 1.25V comparator triggers PFO when the divided voltage falls below threshold - enabling early-warning power-fail detection independent of the main 3.3V rail.
Is MAX706TEUA+T pin-compatible with other MAX706 variants?
Yes, MAX706TEUA+T is fully pin-compatible with all MAX706xUxA variants (e.g., MAX706REUA+T, MAX706SEUA+T) in the µMAX package. All share identical pinout, electrical interface, and functional block diagram - differing only in reset threshold voltage (R=2.63V, S=2.93V, T=3.08V) and temperature grade.
MAX706TEUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-uMAX/uSOP
MAX706TEUA+T FAQ
1.How can I place an order for MAX706TEUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TEUA+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 MAX706TEUA+T reliable?
The price and inventory of MAX706TEUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TEUA+T is usually 5 days.
3.What payment methods are accepted for MAX706TEUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TEUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TEUA+T?
MAX706TEUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TEUA+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 MAX706TEUA+T?
For technical support, including MAX706TEUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TEUA+T requirements.
6.How does Aetrix verify that MAX706TEUA+T is sourced from the original manufacturer or authorized distributors?
All MAX706TEUA+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 MAX706TEUA+T meets industry standards.
7.What is the process for return or replacement of MAX706TEUA+T?
All MAX706TEUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TEUA+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 MAX706TEUA+T part is unused and in its original packaging.
Return procedure for MAX706TEUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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