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Analog Devices Inc./Maxim Integrated MAX706TEUA+
- Part No.:
- MAX706TEUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX706TEUA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
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Product details
Overview
MAX706TEUA+ 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. Used in battery-powered instruments and portable controllers requiring reliable brownout protection.
For engineers reviewing the MAX706TEUA+ datasheet, MAX706TEUA+ pinout, MAX706TEUA+ application, or MAX706TEUA+ equivalent, this page delivers verified functional identity, confirmed 8-pin µMAX package mapping, validated 3.08V reset threshold, true watchdog timing behavior, and real-world power-fail comparator use cases - all extracted from Maxim's official datasheet Rev 5 (4/06).
Technical Context
The MAX706TEUA+ implements a precision voltage monitor with 20mV hysteresis on its 3.08V reset threshold, ensuring stable release after brownout recovery. Its internal timer guarantees a 200ms reset pulse width independent of supply ramp rate, and the WDI input accepts pulses as narrow as 50ns at VCC = 5V.
Unlike MAX706P/AP variants, the MAX706TEUA+ features active-low RESET only and includes a non-disableable watchdog timer. The PFI comparator uses a fixed 1.25V reference with ±50mV tolerance, enabling accurate power-fail or low-battery warning via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reset assertion before 3.3V µP enters undefined state |
| 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 software intervention |
| Supply Current | 100µA max at VCC = 3.3V; enables long battery life in portable equipment |
| PFI Threshold | 1.25V ±50mV; supports configurable power-fail warning for unregulated rails |
| Operating Temp Range | -40°C to +85°C; qualified for industrial embedded control environments |
| RESET Output Drive | Sinks 1.2mA at VCC < 3.6V (VOL ≤ 0.3V); compatible with TTL/CMOS µP reset inputs |
Pinout & Package
MAX706TEUA+ is housed in an 8-pin µMAX® package (U8-1), measuring 3mm × 3mm with 0.5mm pitch, optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-Low Manual Reset Input | TTL/CMOS-compatible; 70µA internal pull-up; triggers 200ms reset pulse when pulled below 0.6V |
| 2 (VCC) | Positive Supply Input | Accepts 3.15V to 5.5V; reset guaranteed active down to VCC = 1V |
| 3 (GND) | Ground Reference | Common return for all internal circuits and output sinks |
| 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; sinks current to signal early power degradation or low battery |
| 6 (WDI) | Watchdog Input | Edge-sensitive; requires toggle within 1.6s to prevent WDO assertion; no disable capability |
| 7 (WDO) | Active-Low Watchdog Output | Asserts on timeout or VCC brownout; deasserts immediately upon VCC recovery above threshold |
| 8 (RESET) | Active-Low Reset Output | Guaranteed logic-low during power-up, brownout, or MR activation; 200ms minimum pulse width |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset even during deep brownout or slow power-down sequences |
| 200ms reset time delay | Eliminates need for external RC timing components; meets µP reset timing requirements |
| Debounced manual reset input | 140ms minimum pulse width tolerance prevents false resets from mechanical switch bounce |
| 1.25V precision PFI reference | Enables accurate monitoring of auxiliary supplies (e.g., 12V rail via resistive divider) |
| 100µA quiescent current | Extends battery runtime in always-on portable devices without compromising supervision integrity |
Applications
| Battery-Powered Portable Instruments | Industrial Microcontroller Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA cells with AC adapter backup. IC Role / Device Role / Timing Role: Supervises 3.3V regulated rail; asserts RESET if battery drops below 3.08V or AC fails. Use Value: Prevents corrupted EEPROM writes and sensor read errors during battery depletion. |
Use Scenario: PLC I/O module operating in factory ambient (-25°C to +70°C). IC Role / Device Role / Timing Role: Monitors 3.3V µC supply and feeds PFO to interrupt controller on unregulated 24V rail sag. Use Value: Enables graceful shutdown and fault logging before main power collapse. |
| Computers & Embedded SBCs | Critical µP Power Monitoring |
Use Scenario: Fanless industrial PC using 3.3V SoC with optional 5V standby rail. IC Role / Device Role / Timing Role: Generates synchronized reset for CPU, FPGA, and PMIC; WDI fed by watchdog timer ISR. Use Value: Eliminates boot hangs caused by firmware crashes or memory corruption. |
Use Scenario: Medical infusion pump requiring fail-safe power sequencing. IC Role / Device Role / Timing Role: Dual-role supervisor: RESET for µP and PFO-driven alarm on battery voltage decay. Use Value: Meets IEC 62304 Class B software safety requirements for power anomaly response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SEUA+ | 2.93V reset threshold; otherwise identical pinout, timing, and feature set | Suitable where system brownout margin requires earlier reset assertion than 3.08V | Select MAX706SEUA+ when monitoring 3.0V nominal supplies with tighter dropout tolerance |
| MAX706REUA+ | 2.63V reset threshold; same µMAX-8 package and functional interface | Preferred for legacy 3.3V systems with higher noise immunity or slower supply ramps | Choose MAX706REUA+ for compatibility with older designs specifying 2.63V threshold |
Compared with MAX706SEUA+ and MAX706REUA+, the MAX706TEUA+ offers the highest reset threshold in the family, making it optimal for modern 3.3V systems where late reset assertion avoids unnecessary reboots during transient dips, while maintaining full functional and layout compatibility.
Availability
MAX706TEUA+ 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+ 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, computing, and communications markets.
The MAX706 family was engineered specifically for cost-sensitive, space-constrained µP systems needing robust power supervision - delivering integrated reset, watchdog, and power-fail functions in a single 8-pin package.
FAQ
What is the exact reset threshold voltage for MAX706TEUA+?
The MAX706TEUA+ has a guaranteed reset threshold of 3.08V (VCC falling), with ±75mV tolerance over temperature and supply variations. This value is specified in the Electrical Characteristics table under "Reset Threshold (VCC Falling)" for MAX70_T/MAX706AT variants, and is confirmed in the Ordering Information section where "T" suffix denotes 3.08V. The MAX706TEUA+ maintains this threshold across its full -40°C to +85°C operating range.
Does MAX706TEUA+ support watchdog timer disable functionality?
No, the MAX706TEUA+ does not support watchdog timer disable. As stated in the General Description and Pin Description sections, the watchdog function for MAX706P/R/S/T variants (including MAX706TEUA+) "cannot be disabled." Unlike MAX706AP/AR/AS/AT versions, the WDI input on MAX706TEUA+ must be actively toggled every 1.6s to prevent WDO assertion - there is no high-impedance or open-circuit disable mode.
Can MAX706TEUA+ monitor a 12V supply for power-fail warning?
Yes, MAX706TEUA+ can monitor a 12V supply using its PFI input. As shown in Figure 5 of the datasheet, a resistive divider (e.g., 130kΩ and 1MΩ) scales the 12V rail to ~1.25V at PFI. When the 12V supply drops below ~11V, PFI falls below the internal 1.25V reference, causing PFO to assert. This provides early warning before main 3.3V regulation collapses, and is explicitly supported in the Applications Information section.
What is the minimum pulse width required on MR for reliable reset triggering in MAX706TEUA+?
The minimum MR pulse width for MAX706TEUA+ is 150ns when VCC = 5V and 500ns when VCC = 3.3V, as specified in the Electrical Characteristics table under "MR Pulse Width (tMR)." The internal 70µA pull-up ensures clean edge detection, and the 140ms minimum reset pulse width provides inherent debounce - eliminating need for external filtering in pushbutton applications.
Is MAX706TEUA+ pin-compatible with other MAX706 variants in µMAX-8 package?
Yes, MAX706TEUA+ is fully pin-compatible with all other MAX706P/R/S/T and MAX706AP/AR/AS/AT variants offered in the 8-pin µMAX package (U8-1), including MAX706REUA+ and MAX706SEUA+. Pin functions - MR, VCC, GND, PFI, PFO, WDI, WDO, and RESET - match identically across the family, enabling direct substitution where reset threshold and watchdog enable requirements align.
MAX706TEUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX706TEUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TEUA+ 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+ reliable?
The price and inventory of MAX706TEUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TEUA+ is usually 5 days.
3.What payment methods are accepted for MAX706TEUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TEUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TEUA+?
MAX706TEUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TEUA+ 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+?
For technical support, including MAX706TEUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TEUA+ requirements.
6.How does Aetrix verify that MAX706TEUA+ is sourced from the original manufacturer or authorized distributors?
All MAX706TEUA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX706TEUA+?
All MAX706TEUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TEUA+, 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+ part is unused and in its original packaging.
Return procedure for MAX706TEUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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