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Analog Devices Inc./Maxim Integrated MAX702ESA+
- Part No.:
- MAX702ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX702ESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:146
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Product details
Overview
MAX702ESA+ from Maxim Integrated is a precision power-supply supervisory circuit designed to monitor +5V supplies and assert a reset signal when VCC falls below 4.65V. It features a debounced manual-reset input (MR), guaranteed valid RESET output down to 1V supply, 200ms minimum reset pulse width, and operates across –40°C to +85°C in an 8-pin narrow-SO package. It is used in microprocessor-based systems requiring reliable power-on and brownout reset.
For engineers reviewing the MAX702ESA+ datasheet, MAX702ESA+ pinout, MAX702ESA+ application, or MAX702ESA+ equivalent, key selection criteria include factory-trimmed 4.65V threshold, MR debouncing capability, extended temperature operation, and compatibility with standard +5V digital logic interfaces without external components.
Technical Context
The MAX702ESA+ implements a single-threshold voltage monitor with internal comparator and RC timing network to generate a minimum 200ms active-low RESET pulse on power-up, power-down, and during undervoltage conditions. Its MR input includes internal 5µA pullup and hardware debouncing to prevent spurious resets from switch bounce.
Unlike the MAX700 and MAX701, the MAX702ESA+ has no SENSE, CTL, or HYST pins - it monitors only VCC directly and provides only one RESET output. Pin 6 is NC, and pin 5 is dedicated RESET; this fixed-configuration simplifies design for basic +5V system supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV (factory-trimmed; ensures consistent power-on reset at nominal +5V rail) |
| RESET Pulse Width | 200–500ms (guaranteed minimum 200ms ensures µP initialization completes before release) | Supply Voltage Range | 1V to 15.5V (valid RESET assertion down to 1V enables robust low-VCC detection) |
| Operating Temperature | –40°C to +85°C (extended range supports industrial and automotive-adjacent embedded applications) |
| Supply Current | 100–200µA (ultra-low quiescent current minimizes impact on battery-backed or low-power systems) |
| MR Input Threshold | 0.7V (TTL-compatible low-level trigger; internal 5µA pullup enables direct pushbutton connection) |
| RESET Output Drive | 3.2mA sink @ 0.4V (compatible with standard CMOS/TTL inputs without external pullups) |
Pinout & Package
MAX702ESA+ is housed in an 8-pin narrow-SO (SOIC) package with 1.27mm pitch, RoHS-compliant lead-free construction (indicated by '+' suffix). Footprint matches JEDEC MS-012AC outline (land pattern 90-0096).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Debounced manual-reset input; active-low, internally pulled up to VCC with 5µA current |
| 2 | GND | Ground reference for all internal comparators and output drivers |
| 3 | RESET | Active-low open-drain reset output; sinks ≥3.2mA at ≤0.4V when asserted |
| 4 | N.C. | No connection - must be left unconnected per datasheet |
| 5 | VCC | +5V supply input and monitored voltage source; valid operation from 1V to 15.5V |
| 6 | N.C. | No connection - electrically isolated; no internal bond wire |
| 7 | N.C. | No connection - electrically isolated; no internal bond wire |
| 8 | N.C. | No connection - electrically isolated; no internal bond wire |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.65V threshold | Eliminates need for external resistor dividers or calibration in +5V systems |
| 200ms minimum RESET pulse width | Guarantees sufficient time for microprocessor core and peripherals to fully initialize |
| Debounced MR input | Hardware-level switch bounce suppression removes need for external RC or firmware debounce |
| Valid RESET down to 1V VCC | Ensures deterministic reset behavior even during severe brownout or battery sag conditions |
| Lead-free narrow-SO package | RoHS-compliant 8-pin SOIC footprint compatible with standard reflow assembly processes |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in harsh electrical environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary power-on and brownout reset generator; asserts RESET until VCC stabilizes above 4.65V and holds for ≥200ms. Use Value: Prevents corrupted firmware execution during unstable AC line transients or backup battery switchover. |
Use Scenario: Ensuring deterministic boot state in portable ultrasound or ECG units powered from rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Monitors main 5V rail derived from DC-DC conversion; triggers hard reset if battery voltage drops below safe operating level. Use Value: Guarantees clinical data integrity by eliminating partial initialization or memory corruption during low-battery shutdown. |
| Network Edge Routers | Automotive Infotainment Gateways |
|
Use Scenario: Supervising auxiliary 5V supplies powering FPGA configuration, PHY interfaces, and management microcontrollers. IC Role / Device Role / Timing Role: Single-point reset source synchronized to 5V rail stability; MR pin enables remote watchdog-triggered recovery. Use Value: Reduces BOM count by replacing discrete RC reset circuits while improving timing accuracy and temperature stability. |
Use Scenario: Reset coordination across multiple SoCs and CAN transceivers during vehicle ignition cycle and sleep/wake transitions. IC Role / Device Role / Timing Role: Provides cold-start reset pulse aligned to 5V domain stabilization; operates reliably across –40°C to +85°C ambient. Use Value: Meets AEC-Q200 stress requirements for extended temperature operation without derating or external compensation. |
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 reset threshold; adjustable delay (0–10s); higher quiescent current (1.1µA typical) | Designed for 3.3V systems; lacks MR debouncing; requires external capacitor for delay tuning | Select when 3.3V rail supervision is required and longer, programmable reset timeout is needed |
| ADM6713ARZ-46 | 4.63V threshold; 240ms min reset pulse; no MR input; SO-8 package | Fixed-function supervisor without manual reset; slightly tighter threshold tolerance (±1.5%) | Select when MR functionality is unnecessary and tighter threshold accuracy is prioritized over flexibility |
Compared with TPS3808G33DBVR and ADM6713ARZ-46, the MAX702ESA+ uniquely combines factory-trimmed 4.65V detection, integrated MR debouncing, and guaranteed 200ms reset pulse in a drop-in SO-8 footprint - making it optimal for cost-sensitive +5V microprocessor systems where simplicity and reliability are critical.
Availability
MAX702ESA+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, network edge routers, and automotive infotainment gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX702ESA+ 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 high-performance analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, communications, and computing markets.
The MAX700/MAX701/MAX702 family was engineered specifically for reliable, low-cost power-supply supervision in +5V microprocessor systems - emphasizing simplicity, guaranteed timing, and minimal external component count.
FAQ
What is the reset threshold voltage of the MAX702ESA+?
The MAX702ESA+ has a factory-trimmed reset threshold of 4.65V, with a specified tolerance of ±150mV across the full operating temperature range (–40°C to +85°C). This value is guaranteed at power-up and power-down, ensuring consistent reset behavior for +5V systems without external calibration. The MAX702ESA+ does not support adjustable thresholds - unlike the MAX700, it monitors VCC directly only.
Does the MAX702ESA+ provide both active-high and active-low reset outputs?
No, the MAX702ESA+ provides only a single active-low RESET output (pin 3). Unlike the MAX701ESA+, it does not include a complementary RESET output. The MAX702ESA+ pinout omits pins 6–8 for RESET, CTL, and SENSE - those functions are absent in this variant, simplifying layout for basic supervision use cases.
Can the MAX702ESA+ operate with supply voltages lower than 5V?
Yes, the MAX702ESA+ operates with VCC from 1V to 15.5V and guarantees correct RESET output state down to 1V. However, its 4.65V reset threshold remains fixed - meaning it is optimized for +5V systems. At VCC < 4.65V, RESET is asserted; at VCC ≥ 4.65V and stable, RESET deasserts after the 200ms minimum pulse width. Operation below 3V may reduce sink current capability but remains functional.
Is the manual reset (MR) input on the MAX702ESA+ debounced internally?
Yes, the MR input on the MAX702ESA+ includes hardware debouncing - a key differentiator from many competing supervisors. When a low pulse is applied to MR (pin 1), the internal circuitry filters out contact bounce, ensuring a clean, single reset assertion. No external RC network or firmware debounce is required, reducing design complexity and PCB area.
What package type and RoHS status does the MAX702ESA+ have?
The MAX702ESA+ is supplied in an 8-pin narrow-SO (SOIC) package with 1.27mm lead pitch and is RoHS-compliant and lead-free, as indicated by the '+' suffix in the part number. It follows JEDEC MS-012AC outline and uses land pattern 90-0096. The 'E' suffix denotes the –40°C to +85°C extended temperature grade, and the 'SA' denotes narrow-SO packaging.
MAX702ESA+ 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:
- 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+ FAQ
1.How can I place an order for MAX702ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX702ESA+ 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+ reliable?
The price and inventory of MAX702ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX702ESA+ is usually 5 days.
3.What payment methods are accepted for MAX702ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX702ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX702ESA+?
MAX702ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX702ESA+ 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+?
For technical support, including MAX702ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX702ESA+ requirements.
6.How does Aetrix verify that MAX702ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX702ESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX702ESA+?
All MAX702ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX702ESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX702ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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