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Analog Devices Inc./Maxim Integrated MAX706ATESA+T
- Part No.:
- MAX706ATESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706ATESA+T.pdf
- Description:
- IC SUPERVISOR MPU 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,426
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Product details
Overview
MAX706ATESA+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. Used in portable instruments and battery-powered controllers for reliable µP startup and brownout recovery.
For engineers reviewing the MAX706ATESA+T datasheet, MAX706ATESA+T pinout, MAX706ATESA+T application, or MAX706ATESA+T equivalent, key selection criteria include its 3.08V reset threshold, 200ms reset pulse width, 100µA quiescent current, active-low RESET output, and SO-8 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The MAX706ATESA+T implements a precision voltage monitor with 3.08V ±1.5% reset threshold and 20mV hysteresis, ensuring stable reset assertion during supply transients. Its internal watchdog timer resets on WDI transitions and times out after 1.6s if no toggle occurs - a critical safeguard against firmware lockup in embedded µP systems.
It integrates a 1.25V reference-based power-fail comparator (PFI/PFO) for early warning of supply collapse, independent of VCC monitoring. The MR input accepts TTL/CMOS-compatible pulses as short as 150ns at VCC = 5V and features internal 70µA pull-up, enabling direct pushbutton interfacing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely triggers reset before 3.3V µP supply dropout |
| Reset Pulse Width | 200ms typical - ensures µP completes full initialization before release |
| Watchdog Timeout | 1.6s ±40% - balances fault detection responsiveness and false-trigger immunity |
| Quiescent Current | 100µA max - enables multi-year operation in battery-backed applications |
| Supply Range | 3.15V to 5.5V - supports both 3.3V and 5V system rails without level shifting |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and flexible pull-up voltage selection |
Pinout & Package
MAX706ATESA+T is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Active-low TTL/CMOS-compatible trigger; internally pulled up with 70µA current |
| 2 (VCC) | Positive Supply Input | Accepts 3.15V–5.5V; powers all internal circuits including reference and comparators |
| 3 (GND) | Ground Reference | Return path for all analog and digital functions; must be low-impedance for noise immunity |
| 4 (PFI) | Power-Fail Input | Connects to resistive divider; asserts PFO when voltage drops below 1.25V threshold |
| 5 (PFO) | Power-Fail Output | Active-low open-drain signal indicating auxiliary supply failure or low-battery condition |
| 6 (WDI) | Watchdog Input | Edge-sensitive input; toggling within 1.6s prevents WDO assertion; high-impedance disables watchdog |
| 7 (WDO) | Watchdog Output | Active-low open-drain interrupt signal; asserts on timeout or VCC brownout |
| 8 (RESET) | Reset Output | Active-low open-drain reset signal asserted during power-up, brownout, or MR activation |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior even during deep brownout or slow power ramp-down |
| Debounced MR input with 140ms min pulse width | Eliminates mechanical switch bounce without external RC filtering |
| WDI disable on high-impedance state | Allows safe watchdog deactivation when µP enters low-power sleep mode |
| 1.25V precision PFI reference with 10mV hysteresis | Prevents chatter on PFO during noisy or slowly decaying supply conditions |
| SO-8 lead-free package (RoHS compliant) | Meets modern environmental compliance requirements and supports automated assembly |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers with Brownout Resilience |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA cells with AC adapter backup. IC Role / Device Role / Timing Role: Supervises 3.3V rail from DC-DC converter; asserts RESET during battery depletion or adapter disconnect. Use Value: Prevents corrupted EEPROM writes and ensures clean µP restart when supply recovers - critical for measurement integrity. |
Use Scenario: PLC I/O module operating in factory environment with fluctuating 24V bus-derived 3.3V supply. IC Role / Device Role / Timing Role: Monitors local 3.3V domain; triggers watchdog reset if µP hangs due to EMI-induced crash. Use Value: Maintains control loop continuity without operator intervention - avoids production line stoppages. |
| Embedded Computing in Ruggedized Devices | Low-Power IoT Edge Node with Power-Fail Warning |
Use Scenario: In-vehicle telematics unit exposed to cold-cranking voltage dips. IC Role / Device Role / Timing Role: Generates 200ms reset pulse synchronized to VCC recovery above 3.08V threshold. Use Value: Guarantees ARM Cortex-M4 boots only after stable power - eliminates boot failures at –40°C. |
Use Scenario: Wireless sensor node powered by Li-SOCl₂ battery with 10-year lifespan. IC Role / Device Role / Timing Role: Uses PFI/PFO to detect falling battery voltage via resistor divider; signals µP 500ms before cutoff. Use Value: Enables graceful shutdown and nonvolatile data save - preserves sensor calibration history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Identical pinout, same 3.08V reset threshold and SO-8 package; differs only in temp grade (0°C to +70°C vs. –40°C to +85°C) | Suitable for commercial-grade applications without extended temperature requirements | Select MAX706TESA+ only if ambient operating temperature stays within 0°C–70°C. |
| TPS3808G33DBVR | 3.3V reset threshold (±0.5%), 200ms delay, but no integrated watchdog or PFI/PFO comparator | Lacks power-fail warning and watchdog functionality - requires external components for equivalent capability | Choose only if watchdog and PFI features are unnecessary and tighter reset tolerance is prioritized. |
Compared with MAX706TESA+, MAX706ATESA+T extends operational reliability to industrial temperatures; compared with TPS3808G33DBVR, it delivers integrated watchdog and power-fail monitoring in a single SO-8 IC - reducing BOM count and PCB area while maintaining identical reset timing behavior.
Availability
MAX706ATESA+T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered portable instruments, and ruggedized embedded computing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX706ATESA+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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX706 family delivers cost-optimized µP supervision with integrated reset, watchdog, and power-fail detection - engineered specifically for space-constrained, low-power embedded systems operating from 3V/3.3V supplies.
FAQ
What is the exact reset threshold voltage for MAX706ATESA+T?
The MAX706ATESA+T has a nominal reset threshold of 3.08V, with a guaranteed tolerance of ±1.5% over temperature and supply variations. This value is specified for VCC falling conditions and includes 20mV hysteresis to prevent oscillation near the trip point. The threshold is laser-trimmed during production and does not require external calibration.
Does MAX706ATESA+T include a watchdog timer function?
Yes, MAX706ATESA+T includes a watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on any edge transition at the WDI pin and asserts the WDO output low if no transition occurs within that window. Unlike the MAX706R/S/T variants, the MAX706ATESA+T belongs to the MAX706AT series, which supports watchdog disable when WDI is left floating or driven high-impedance.
Can MAX706ATESA+T monitor a power supply other than VCC?
Yes, MAX706ATESA+T provides a dedicated 1.25V precision reference for the PFI input, enabling monitoring of auxiliary supplies such as battery voltage or unregulated DC rails. By connecting PFI to a resistive divider, users can set custom trip points - for example, detecting Li-ion battery voltage drop below 3.0V or 12V rail collapse before regulator dropout.
What is the minimum pulse width required on the MR pin for reliable reset activation?
The MR pin of MAX706ATESA+T requires a minimum pulse width of 150ns when VCC = 5V and 500ns when VCC = 3.3V. These values are guaranteed across the full operating temperature range. The internal 70µA pull-up ensures MR remains logic-high when unconnected, making discrete pull-up resistors unnecessary in most designs.
Is MAX706ATESA+T compatible with 5V microprocessor systems?
Yes, MAX706ATESA+T operates over a supply range of 3.15V to 5.5V and maintains full specification compliance at 5V. Its RESET, WDO, and PFO outputs are open-drain and tolerate voltages up to VCC + 0.3V, allowing direct interface with 5V-tolerant µP reset inputs. Logic thresholds scale with VCC, ensuring robust noise margins at both 3.3V and 5V operation.
MAX706ATESA+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
MAX706ATESA+T FAQ
1.How can I place an order for MAX706ATESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706ATESA+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 MAX706ATESA+T reliable?
The price and inventory of MAX706ATESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706ATESA+T is usually 5 days.
3.What payment methods are accepted for MAX706ATESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706ATESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706ATESA+T?
MAX706ATESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706ATESA+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 MAX706ATESA+T?
For technical support, including MAX706ATESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706ATESA+T requirements.
6.How does Aetrix verify that MAX706ATESA+T is sourced from the original manufacturer or authorized distributors?
All MAX706ATESA+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 MAX706ATESA+T meets industry standards.
7.What is the process for return or replacement of MAX706ATESA+T?
All MAX706ATESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706ATESA+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 MAX706ATESA+T part is unused and in its original packaging.
Return procedure for MAX706ATESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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