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Analog Devices Inc./Maxim Integrated MAX709TESA+T
- Part No.:
- MAX709TESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX709TESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,253
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Product details
Overview
MAX709TESA+T from Maxim Integrated is a precision power-supply monitor IC with active-low reset output, designed for +3V systems. It asserts RESET when VCC falls below 3.08V (±0.08V), holds reset for ≥140ms after VCC recovers, and operates down to VCC = 1V. Its 35µA supply current, immunity to short VCC transients, and 8-pin SO package make it ideal for low-power microprocessor supervision in industrial controllers.
For engineers reviewing the MAX709TESA+T datasheet, MAX709TESA+T pinout, MAX709TESA+T application, or MAX709TESA+T equivalent, key selection criteria include reset threshold accuracy (3.08V nominal), guaranteed minimum reset timeout (140ms), VCC operating range (1.0V–5.5V), and compatibility with 3V/3.3V/5V logic interfaces without external components.
Technical Context
The MAX709TESA+T integrates a precision voltage comparator with hysteresis and a monostable timer to generate a clean, glitch-immune reset pulse. Its internal reference ensures stable 3.08V reset threshold across temperature (±0.5% typical drift) and supply voltage variation.
It features an open-drain RESET output capable of sinking 1.2mA at VCC = reset threshold min, supports bidirectional µP reset pins via series resistor buffering, and maintains valid output state down to VCC = 1V-enabling reliable brownout detection before system collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.08V - precisely matches 3V system supply rails with margin for brownout detection |
| Reset Timeout | 140ms min - ensures full microprocessor initialization before release from reset |
| Supply Current | 35µA typ - enables battery-backed operation for >10 years in low-duty-cycle systems |
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 3.3V/5V logic |
| RESET Output Type | Open-drain - allows wired-OR configuration and level translation with external pull-up |
| Transient Immunity | Immune to ≤40µs negative VCC glitches 100mV below threshold - prevents spurious resets in noisy environments |
| Operating Temp | -40°C to +85°C - qualified for industrial ambient conditions without derating |
Pinout & Package
MAX709TESA+T is housed in an 8-pin SO (Small Outline) package, 150mil width, RoHS-compliant and lead-free (+T suffix). Pin 1 is top-left corner, marked by dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 6, 8 | No Connect | Internally unconnected - must be left floating or tied to GND per layout best practice |
| 2 | VCC | Main supply input - requires local 0.1µF bypass capacitor for transient immunity |
| 3 | GND | Analog/digital ground reference - connect directly to system ground plane |
| 7 | RESET | Active-low open-drain reset output - requires external pull-up to VCC or logic rail |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates precision reference, comparator, and timing circuitry - eliminates trimming resistors, capacitors, and discrete logic |
| 140ms minimum power-on reset delay | Guaranteed minimum timeout ensures µP clock stabilization and memory initialization before release |
| Valid RESET output down to VCC = 1V | Enables early brownout detection while preserving reset assertion integrity during supply collapse |
| Immunity to short negative VCC transients | Withstands ≤40µs glitches 100mV below threshold - reduces need for additional filtering in EMI-prone environments |
| Low 35µA quiescent current | Minimizes standby power draw in battery-powered or energy-harvesting applications |
Applications
| Industrial PLC I/O Modules | Medical Sensor Nodes |
|---|---|
Use Scenario: Supervising ARM Cortex-M4-based I/O modules exposed to 24V field wiring noise and wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Power-supply monitor providing deterministic reset assertion during brownout and recovery, synchronized to 3.3V core rail. Use Value: Eliminates external RC network, reduces BOM count by 3 parts, and guarantees ≥140ms reset hold time even at -40°C. | Use Scenario: Enabling safe shutdown and restart of wearable ECG front-end ASICs powered from coin-cell batteries. IC Role / Device Role / Timing Role: Low-current supervisor detecting 3.0V battery depletion and asserting reset before analog front-end corruption. Use Value: 35µA supply current extends battery life beyond 2 years; 3.08V threshold aligns with LiMnO₂ discharge curve endpoint. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Monitoring 3.3V MCU supply in DIN-rail mounted meters subject to load-switching transients and extended storage at high temperature. IC Role / Device Role / Timing Role: Brownout detector with temperature-stable reset threshold and glitch immunity for EN 50470-3 compliance. Use Value: ±0.5% threshold drift over -40°C to +85°C ensures consistent trip point; no calibration needed across production lot. | Use Scenario: Reset supervision for LIN subsystem MCUs in door module ECUs operating from 12V-to-3.3V DC/DC converters. IC Role / Device Role / Timing Role: Secondary supervisor verifying post-regulator stability before enabling CAN/LIN communication stack. Use Value: Open-drain RESET allows direct interface to 3.3V µP reset pin with 10kΩ pull-up; immune to 100mV/40µs load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Includes watchdog timer and manual reset input; same 3.08V threshold and 140ms timeout | Required where firmware hang detection or user-initiated reset is needed | Select MAX706TESA+ if watchdog functionality is mandatory; otherwise MAX709TESA+T offers lower cost and smaller footprint |
| TPS3808G30DBVR | TI part with 3.0V threshold (±0.5%), 200ms timeout, 1.5µA quiescent current, but no VCC < 1V guarantee | Better suited for ultra-low-power battery applications where long-term standby dominates | Choose TPS3808G30DBVR only when sub-µA supply current is critical and VCC > 1.2V operation suffices |
Compared with MAX706TESA+, MAX709TESA+T omits watchdog and manual reset to reduce cost and complexity; versus TPS3808G30DBVR, it trades ultra-low current for guaranteed reset validity down to 1V-critical for robust brownout response in industrial systems.
Availability
MAX709TESA+T is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor nodes, smart energy meters, and automotive body control modules requiring stable component supply and long-lifecycle support.
Supply support for MAX709TESA+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 industrial, medical, and communications applications, emphasizing reliability, integration, and low-power operation.
The MAX709 family targets cost-sensitive, space-constrained microprocessor supervision-delivering accurate reset generation with zero external components for 3V/3.3V/5V systems across industrial temperature ranges.
FAQ
What is the exact reset threshold voltage for MAX709TESA+T?
The MAX709TESA+T has a nominal reset threshold of 3.08V, with guaranteed limits of 3.00V (min) and 3.15V (max) over the full -40°C to +85°C temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table under "RESET Threshold, VTH" for suffix T. The threshold remains stable with ±0.5% typical drift over temperature, making it suitable for precise 3V system monitoring.
Does MAX709TESA+T require external components to function?
No, MAX709TESA+T requires no external components for basic reset functionality. It integrates all necessary reference, comparator, and timing circuitry. A 0.1µF ceramic bypass capacitor on VCC (pin 2) is recommended for transient immunity but not strictly required for DC operation. No pull-up resistor is built-in-external pull-up to VCC or logic rail is needed for the open-drain RESET output (pin 7).
Can MAX709TESA+T operate when VCC drops below 1V?
MAX709TESA+T guarantees correct RESET output state down to VCC = 1V. Below 1V, the RESET output becomes high-impedance (open-circuit) and no longer actively sinks current. For applications requiring valid RESET down to 0V, a 100kΩ pull-down resistor on the RESET line is recommended-as documented in the Applications Information section of the MAX709TESA+T datasheet.
What is the minimum reset timeout duration for MAX709TESA+T?
The minimum reset timeout for MAX709TESA+T is 140ms, measured from the moment VCC rises above the reset threshold until RESET deasserts. This is a guaranteed minimum across temperature and supply voltage. Typical timeout is 280ms, and maximum is 560ms-providing ample margin for microprocessor clock stabilization and memory initialization before software execution begins.
Which package type does MAX709TESA+T use, and is it RoHS-compliant?
MAX709TESA+T uses an 8-pin SO (Small Outline) package, 150mil width, with gull-wing leads. The "+T" suffix explicitly denotes lead-free, RoHS-compliant packaging per JEDEC J-STD-020. The device meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH.
MAX709TESA+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
MAX709TESA+T FAQ
1.How can I place an order for MAX709TESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX709TESA+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 MAX709TESA+T reliable?
The price and inventory of MAX709TESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX709TESA+T is usually 5 days.
3.What payment methods are accepted for MAX709TESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX709TESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX709TESA+T?
MAX709TESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX709TESA+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 MAX709TESA+T?
For technical support, including MAX709TESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX709TESA+T requirements.
6.How does Aetrix verify that MAX709TESA+T is sourced from the original manufacturer or authorized distributors?
All MAX709TESA+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 MAX709TESA+T meets industry standards.
7.What is the process for return or replacement of MAX709TESA+T?
All MAX709TESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX709TESA+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 MAX709TESA+T part is unused and in its original packaging.
Return procedure for MAX709TESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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