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Analog Devices Inc./Maxim Integrated MAX706TESA+
- Part No.:
- MAX706TESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706TESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,224
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Product details
Overview
MAX706TESA+ 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 portable instruments and battery-powered controllers for reliable µP startup and brownout recovery.
For engineers reviewing the MAX706TESA+ datasheet, MAX706TESA+ pinout, MAX706TESA+ application, or MAX706TESA+ equivalent, key selection criteria include its 3.08V reset threshold, SO-8 package, -40°C to +85°C industrial temperature range, and compatibility with 3.3V/5V supply rails in embedded control and instrumentation designs.
Technical Context
The MAX706TESA+ 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 200ms reset pulse width after VCC exceeds threshold or MR release.
Watchdog functionality relies on edge-triggered WDI input with 100ns minimum pulse width at 3V; WDO asserts low if no transition occurs within 1.6s. Unlike MAX706AP variants, the MAX706TESA+ watchdog cannot be disabled - WDI must be actively toggled or tied to a driven logic signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable 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; balances fault detection responsiveness with software execution margin |
| Supply Current | 100µA max at VCC = 3.3V; enables long battery life in portable equipment |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded controller environments |
| PFO Threshold | 1.25V ±0.05V; supports accurate low-battery or unregulated supply monitoring via external resistor divider |
| MR Input Compatibility | TTL/CMOS; allows direct interface with pushbutton switches or µP GPIO without level-shifting |
Pinout & Package
MAX706TESA+ is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, lead-free compliant, with 1.27mm pitch and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | Pull below 0.6V to trigger 200ms reset pulse; internally pulled up with 70µA current |
| 2 (VCC) | Positive supply input | Accepts 3.15V to 5.5V; reset asserted down to VCC = 1V |
| 3 (GND) | Ground reference | Common return for all internal circuits and output sinks |
| 4 (PFI) | Power-fail comparator input | Compares against internal 1.25V reference; used for battery warning or auxiliary supply monitoring |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; can interrupt µP or drive MR for cascaded reset |
| 6 (WDO) | Active-low watchdog output | Goes low if WDI not toggled within 1.6s; also asserts during VCC brownout |
| 7 (RESET) | Active-low reset output | Drives µP reset pin; remains low ≥200ms after VCC rise or MR release |
| 8 (WDI) | Watchdog input | Edge-sensitive; requires rising/falling transition every 1.6s to prevent WDO assertion |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery sag conditions |
| 200ms reset time delay | Meets µP reset timing requirements without external RC components |
| Debounced manual reset input | Eliminates need for external hardware debounce circuitry on pushbutton interfaces |
| 1.25V precision PFI threshold | Enables accurate low-battery detection or secondary supply monitoring with minimal external parts |
| 100µA quiescent current | Supports multi-year operation in coin-cell–powered portable instruments |
Applications
| Battery-Powered Portable Instruments | Industrial Controller Power Monitoring |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA batteries with AC adapter fallback. IC Role / Device Role / Timing Role: Supervises 3.3V rail, triggers reset on battery voltage drop below 3.08V, and warns of impending power loss via PFO-driven µP interrupt. Use Value: Prevents corrupted measurements during battery depletion and enables graceful shutdown before data loss. |
Use Scenario: PLC I/O module operating in factory environment with fluctuating 24V DC input. IC Role / Device Role / Timing Role: Monitors regulated 3.3V logic supply; asserts RESET on brownout and uses WDO to detect firmware lockup. Use Value: Eliminates need for external watchdog timer IC while ensuring µP reliability under noisy industrial power conditions. |
| Embedded Computing Systems | Critical µP Power Monitoring |
Use Scenario: Fanless industrial PC using 3.3V SoC with backup supercapacitor hold-up. IC Role / Device Role / Timing Role: Generates power-on reset, monitors main 3.3V rail, and signals capacitor discharge via PFI/PFO before shutdown. Use Value: Enables deterministic boot sequence and safe state capture prior to complete power loss. |
Use Scenario: Medical diagnostic device requiring fail-safe µP restart on any supply anomaly. IC Role / Device Role / Timing Role: Primary reset supervisor with 3.08V threshold matched to 3.3V µP VDD min spec; WDO tied to NMI for lockup recovery. Use Value: Meets IEC 62304 safety requirements for automatic recovery from undervoltage and software hang conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+ | 2.63V reset threshold; same SO-8 package and -40°C to +85°C rating | Designed for 2.7V–3.0V µP systems; unsuitable where 3.3V rail must remain above reset point until full dropout | Select only if system VDD nominal is ≤3.0V and brownout margin must begin earlier |
| MAX706SESA+ | 2.93V reset threshold; identical pinout, timing, and feature set | Optimized for 3.0V–3.3V systems with tighter tolerance between supply and reset trip point | Prefer when µP VDD min spec is 2.95V and design requires earlier reset assertion than MAX706TESA+ |
Compared with MAX706RCSA+ and MAX706SESA+, the MAX706TESA+ offers the highest reset threshold (3.08V) in the family, making it optimal for 3.3V systems where maximum supply headroom before reset is critical - especially in battery-powered applications where voltage decay must be closely tracked.
Availability
MAX706TESA+ 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 MAX706TESA+ 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 applications.
The MAX706 family was designed specifically for cost-sensitive, space-constrained µP systems needing integrated reset, watchdog, and power-fail monitoring - eliminating discrete solutions in portable and embedded control designs.
FAQ
What is the reset threshold voltage of the MAX706TESA+?
The MAX706TESA+ has a fixed reset threshold of 3.08V (typical) with ±75mV tolerance over temperature and supply. 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. This makes MAX706TESA+ ideal for 3.3V systems where reset must occur just before the µP's minimum operating voltage is violated.
Does the MAX706TESA+ include a watchdog timer, and how is it configured?
Yes, the MAX706TESA+ includes a watchdog timer with a nominal timeout of 1.6s. It is edge-triggered via the WDI pin: any rising or falling transition resets the timer. If no transition occurs within 1.6s, WDO asserts low. Unlike MAX706AP variants, the MAX706TESA+ watchdog cannot be disabled - WDI must be actively toggled by firmware or tied to a driven clock/GPIO. WDO also asserts immediately during VCC brownout.
Can the MAX706TESA+ monitor a power supply other than VCC?
Yes, the MAX706TESA+ includes a dedicated PFI (Power-Fail Input) pin referenced to an internal 1.25V comparator. By connecting PFI to a resistive divider from an unregulated or auxiliary supply (e.g., 12V rail or battery), the device generates a PFO (Power-Fail Output) signal when that supply drops below the calculated threshold. This enables early-warning shutdown or status indication independent of the main 3.3V VCC rail monitored by the reset function.
What package type and temperature range does the MAX706TESA+ use?
The MAX706TESA+ is supplied in an 8-pin SO (Small Outline) package (JEDEC MS-012AC, pkg code S8-2), with 1.27mm lead pitch and lead-free finish. It is rated for operation from -40°C to +85°C, meeting industrial temperature requirements. The SO package supports automated PCB assembly and provides thermal and mechanical reliability comparable to larger DIP variants while reducing board area by >50%.
How does the manual reset (MR) input function on the MAX706TESA+?
The MR pin on the MAX706TESA+ is an active-low, TTL/CMOS-compatible input that triggers a full 200ms reset pulse when pulled below 0.6V. It features internal 70µA pull-up current, allowing direct connection to a pushbutton switch (to GND) without external resistors. Minimum MR pulse width is 150ns at VCC = 5V or 500ns at VCC = 3.3V. MR can also be driven by µP GPIO for software-initiated resets, and its debounced behavior eliminates need for external RC filtering.
MAX706TESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
MAX706TESA+ FAQ
1.How can I place an order for MAX706TESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TESA+ 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+ reliable?
The price and inventory of MAX706TESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TESA+ is usually 5 days.
3.What payment methods are accepted for MAX706TESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TESA+?
MAX706TESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TESA+ 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+?
For technical support, including MAX706TESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TESA+ requirements.
6.How does Aetrix verify that MAX706TESA+ is sourced from the original manufacturer or authorized distributors?
All MAX706TESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX706TESA+?
All MAX706TESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX706TESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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