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Analog Devices Inc./Maxim Integrated MAX702ESA-T
- Part No.:
- MAX702ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX702ESA-T.pdf
- Description:
- IC SUPERVISOR PWR SUP MON RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX702ESA-T from Maxim Integrated is a precision power-supply supervisory IC that monitors +5V systems and asserts an active-low RESET signal when VCC drops below 4.65V. It features a debounced manual-reset input (MR), guaranteed valid reset output down to 1V VCC, and delivers a minimum 200ms reset pulse during power-up, power-down, and brownout conditions. Used in microprocessor-based embedded controllers for reliable system initialization.
For engineers reviewing the MAX702ESA-T datasheet, MAX702ESA-T pinout, MAX702ESA-T application, or MAX702ESA-T equivalent, key selection criteria include its fixed 4.65V reset threshold, −40°C to +85°C extended temperature operation, narrow-SO-8 package, and compatibility with low-power µP reset sequencing requirements.
Technical Context
The MAX702ESA-T implements a single-voltage monitoring channel with internal bandgap reference and comparator circuitry. Its reset logic guarantees correct output state for VCC ≥ 1V and provides built-in hysteresis (~30mV) to prevent chatter near threshold. No external components are required for standard +5V operation.
Unlike the MAX700/MAX701, the MAX702ESA-T lacks SENSE, CTL, and HYST pins - it monitors only VCC directly and outputs only RESET (no RESET). Its MR input includes internal 5µA pullup and debouncing, enabling robust pushbutton reset without external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV - factory-trimmed for stable +5V system monitoring without calibration. |
| Reset Pulse Width | 200–500ms - ensures µP reset assertion meets minimum timing requirements across voltage transients. |
| Min Valid VCC | 1.0V - guarantees functional reset output even during deep brownout or battery sag. |
| Supply Current | 100–200µA - enables use in always-on monitoring circuits with negligible power impact. |
| Operating Temp | −40°C to +85°C - supports industrial and extended-temperature embedded applications. |
| Package | 8-pin narrow-SO - surface-mount compatible with standard PCB assembly and 150°C reflow profiles. |
| MR Input Threshold | 0.7V - compatible with TTL/CMOS logic levels for clean manual reset triggering. |
Pinout & Package
MAX702ESA-T is supplied in an 8-pin narrow-SO (SOIC-8) package with 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant lead-free construction (suffix "+" optional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Debounced active-low input with internal 5µA pullup; asserts RESET when pulled ≤0.7V. |
| 2 GND | Ground Reference | Primary return path for all internal circuitry and reset output sink current. |
| 3 RESET | Active-Low Reset Output | Open-drain output; sinks ≥3.2mA at 0.4V max drop for direct µP /RESET connection. |
| 4 VCC | Power Supply Input | +3V to +5.5V supply pin; also serves as monitored voltage source when CTL/SENSE/HYST not present. |
| 5–8 N.C. | No Connection | Pins 5–8 are unconnected internally; must remain floating or grounded per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.65V Reset Threshold | Eliminates external resistor dividers and calibration for standard +5V systems. |
| 200ms Minimum Reset Pulse | Meets Intel and ARM µP reset timing requirements without external timing capacitors. |
| Debounced Manual-Reset Input | Prevents false resets from mechanical switch bounce; no external RC needed. |
| Valid Reset Down to 1V VCC | Ensures deterministic reset behavior during severe undervoltage or battery discharge. |
| Narrow-SO-8 Package | Reduces PCB area vs. PDIP; supports automated assembly and thermal performance up to +85°C. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in factory environments with fluctuating 5V rails. IC Role / Device Role / Timing Role: Primary power-good monitor and hard reset generator for ARM Cortex-M7 host MCU. Use Value: Guarantees 200ms reset hold time during 5V rail dips caused by motor switching noise, preventing firmware corruption. | Use Scenario: Ensuring safe boot and watchdog-triggered recovery in portable ultrasound units powered from Li-ion batteries. IC Role / Device Role / Timing Role: Brownout detector and reset initiator for safety-critical FPGA and ADC subsystems. Use Value: Maintains valid RESET output down to 1.0V VCC, enabling controlled shutdown before battery cutoff. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
Use Scenario: Cold-cranking resilience in 12V-to-5V converted infotainment systems exposed to engine start transients. IC Role / Device Role / Timing Role: System-level reset supervisor for SoC and audio codec during VCC sags. Use Value: Factory-trimmed 4.65V threshold rejects short-duration noise spikes while responding reliably to sustained undervoltage. | Use Scenario: Tamper-resistant power monitoring in utility-grade meters requiring long-term reliability under wide ambient temperatures. IC Role / Device Role / Timing Role: Primary reset source for metrology ASIC and secure bootloader execution. Use Value: Extended −40°C to +85°C operation ensures consistent reset timing across outdoor deployment conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed reset threshold; 2% accuracy; 350ms default timeout (adjustable via capacitor). | Designed for 3.3V systems; requires external timing cap for non-default pulse width. | Select when monitoring 3.3V rails or needing adjustable reset duration. |
| ADM6705ARTZ-REEL7 | 4.63V threshold; 200ms min pulse; SOT-23-5 package; no manual reset input. | Smaller footprint but lacks MR pin; limited to space-constrained designs where manual reset is unnecessary. | Select for compact layouts where board space is critical and manual reset is handled elsewhere. |
Compared with TPS3808G33DBVR and ADM6705ARTZ-REEL7, the MAX702ESA-T offers fixed +5V compatibility, integrated MR debouncing, and guaranteed 1V-minimum VCC operation - making it optimal for legacy and industrial 5V µP systems requiring zero-component supervision.
Availability
MAX702ESA-T is available at Aetrix Electronics and suitable for industrial controllers, medical instruments, smart energy meters, and automotive infotainment head units requiring stable component supply across extended temperature ranges.
Supply support for MAX702ESA-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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, interface, sensing, and security applications.
The MAX700/MAX701/MAX702 family was designed specifically for cost-sensitive, high-reliability power-supply monitoring in microprocessor-based systems - emphasizing simplicity, low external part count, and robust reset timing.
FAQ
What is the reset threshold voltage of the MAX702ESA-T?
The MAX702ESA-T has a factory-trimmed reset threshold of 4.65V, with a tolerance of ±150mV over the full −40°C to +85°C operating range. This value is optimized for +5V digital systems and requires no external components or calibration. The MAX702ESA-T asserts its open-drain RESET output low when VCC falls below this threshold and holds it for a minimum of 200ms after VCC recovers.
Does the MAX702ESA-T support manual reset functionality?
Yes, the MAX702ESA-T includes a dedicated MR (Manual Reset) pin (Pin 1) with internal 5µA pullup and hardware debouncing. Pulling MR low to ≤0.7V triggers an immediate RESET assertion, independent of VCC level. This eliminates the need for external RC filters or Schmitt-trigger buffers, simplifying board design while ensuring noise immunity during pushbutton operation.
What is the minimum supply voltage at which the MAX702ESA-T guarantees correct RESET output behavior?
The MAX702ESA-T guarantees correct RESET output state - meaning predictable high-impedance or low-level behavior - for VCC voltages as low as +1.0V. This capability ensures reliable reset assertion during deep brownout events or battery discharge scenarios where other supervisors may fail, making the MAX702ESA-T especially valuable in safety-critical and portable applications.
Is the MAX702ESA-T pin-compatible with other devices in the MAX700/MAX701/MAX702 family?
No, the MAX702ESA-T is not pin-compatible with the MAX700 or MAX701. While all three share the same 8-pin narrow-SO package outline, the MAX702ESA-T has no SENSE, CTL, HYST, or RESET pins - only MR, GND, RESET, and VCC (with Pins 5–8 unconnected). Substituting it for MAX700/MAX701 would require PCB redesign due to missing and repurposed pins.
What package type and temperature grade does the MAX702ESA-T use?
The MAX702ESA-T uses an 8-pin narrow-SO (SOIC-8) package with 1.27mm lead pitch and is rated for the extended industrial temperature range of −40°C to +85°C. The "E" suffix denotes the extended temperature grade, and the "SA" suffix specifies the narrow-SO package. It is RoHS-compliant and available in lead-free form (add "+" suffix when ordering).
MAX702ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX702ESA-T FAQ
1.How can I place an order for MAX702ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX702ESA-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 MAX702ESA-T reliable?
The price and inventory of MAX702ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX702ESA-T is usually 5 days.
3.What payment methods are accepted for MAX702ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX702ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX702ESA-T?
MAX702ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX702ESA-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 MAX702ESA-T?
For technical support, including MAX702ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX702ESA-T requirements.
6.How does Aetrix verify that MAX702ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX702ESA-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 MAX702ESA-T meets industry standards.
7.What is the process for return or replacement of MAX702ESA-T?
All MAX702ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX702ESA-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 MAX702ESA-T part is unused and in its original packaging.
Return procedure for MAX702ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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