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Analog Devices Inc./Maxim Integrated MAX702CPA+
- Part No.:
- MAX702CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX702CPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,181
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Product details
Overview
MAX702CPA+ from Maxim Integrated is a +5V power-supply supervisory circuit with fixed 4.65V reset threshold, debounced manual-reset input, and guaranteed RESET assertion down to VCC = 1V. It delivers a minimum 200ms active-low reset pulse during power-up, power-down, and brownout conditions, and is housed in an 8-pin PDIP package for commercial-temperature (0°C to +70°C) embedded microprocessor systems.
For engineers reviewing the MAX702CPA+ datasheet, MAX702CPA+ pinout, MAX702CPA+ application, or MAX702CPA+ equivalent, key selection criteria include its factory-trimmed reset threshold, no-external-component operation with +5V rails, MR debouncing capability, guaranteed low-VCC reset validity, and compatibility with µP reset inputs requiring open-drain or push-pull compatible drive.
Technical Context
The MAX702CPA+ implements a precision bandgap-based voltage comparator with internal hysteresis (~30mV) to reject supply noise and prevent false resets. Its RESET output is actively driven low (≤0.4V at 3.2mA sink) and pulled high to VCC–0.4V when asserted, supporting direct interface to TTL/CMOS µP reset pins.
Unlike the MAX700/MAX701, the MAX702CPA+ lacks SENSE, CTL, and HYST pins-its monitoring is exclusively VCC-referenced with fixed 4.65V threshold and no external adjustability. The debounced MR input includes an internal 5µA pullup and triggers reset on logic-low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV (factory-trimmed); ensures reliable reset initiation before +5V system instability. |
| Reset Pulse Width | 200–500ms; guarantees µP initialization completes before release, even under slow-rising VCC. | Min Valid VCC for Reset | 1.0V; enables correct reset state retention during deep brownout or battery sag down to 1V. |
| Supply Current | 100–200µA; enables always-on supervision without significant impact on standby power. |
| MR Input Threshold | 0.7V max; ensures robust detection of mechanical pushbutton closure despite contact bounce. |
| RESET Output Low | ≤0.4V at 3.2mA sink; meets TTL/CMOS input low-level requirements for direct µP reset connection. |
| Operating Temp | 0°C to +70°C; qualified for commercial-grade industrial control, instrumentation, and computing applications. |
Pinout & Package
MAX702CPA+ uses an 8-pin plastic dual-inline package (PDIP) with 0.3-inch body width and standard through-hole footprint. Pin 1 is marked by a notch or dot; pin numbering follows counterclockwise convention from top-left.
| 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 comparators, reset driver, and MR pullup current. |
| 3 RESET | Active-Low Reset Output | Open-drain/push-pull compatible output; sinks ≥3.2mA, drives low ≤0.4V, high = VCC–0.4V. |
| 4 N.C. | No Connection | Internally unconnected; must be left floating or tied to GND-no routing required. |
| 5 N.C. | No Connection | Internally unconnected; electrically isolated-no PCB trace needed. |
| 6 N.C. | No Connection | Internally unconnected; no functional role; avoid routing or loading. |
| 7 VCC | Power Supply Input | +5V supply input and monitored rail; supports absolute max 15.5V, operates down to 1V. |
| 8 N.C. | No Connection | Internally unconnected; not bonded; leave unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed 4.65V Threshold | Eliminates external resistor dividers and calibration effort for +5V systems. |
| 200ms Minimum Reset Pulse | Guarantees µP core and peripherals fully initialize before release, independent of VCC ramp rate. |
| Debounced Manual-Reset Input | Internal timing rejects <100ms contact bounce, enabling direct pushbutton use without RC filters. |
| Valid Reset Down to 1V VCC | Maintains deterministic reset state during severe brownout or battery discharge below 2V. |
| No External Components Required | Reduces BOM count, layout area, and qualification burden for cost-sensitive embedded designs. |
Applications
| Industrial PLC Controllers | Embedded Data Acquisition Systems |
|---|---|
Use Scenario: Programmable logic controllers operating in factory environments with fluctuating 5V supplies and EMI exposure. IC Role / Device Role / Timing Role: Primary power-fail detector and cold/warm reset initiator for ARM Cortex-M or 8051 microcontrollers. Use Value: Prevents firmware corruption during line sags by asserting RESET before VCC drops below µP operational minimum. |
Use Scenario: Portable sensor nodes logging analog data with flash storage and real-time clocks. IC Role / Device Role / Timing Role: Supervisor ensuring clean boot after battery insertion or wake-from-sleep transitions. Use Value: 200ms pulse guarantees RTC register initialization and ADC calibration complete before main firmware executes. |
| Medical Diagnostic Instruments | Networked Point-of-Sale Terminals |
Use Scenario: Handheld ultrasound or glucose meters requiring FDA-compliant power sequencing and fault recovery. IC Role / Device Role / Timing Role: Safety-critical reset generator that remains functional down to 1V to detect battery depletion. Use Value: Enables graceful shutdown and error logging before power collapse, meeting IEC 62304 software safety requirements. |
Use Scenario: Retail terminals with Ethernet/Wi-Fi modules and secure payment processors subject to grid instability. IC Role / Device Role / Timing Role: System-level reset arbiter coordinating µP, crypto IC, and communication PHY startup timing. Use Value: Synchronized reset prevents race conditions between secure boot ROM and peripheral configuration registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | Adjustable threshold (0.4–5.8V), 2% accuracy, 350ms min reset pulse, 2.9µA quiescent current. | Requires external resistor divider; better suited for non-5V rails or tighter accuracy needs. | Select when designing for 3.3V or mixed-voltage systems where 4.65V is not optimal. |
| ADM6713ARZ-46 | Fixed 4.63V threshold, 200ms min pulse, 1.5µA IQ, SOIC-8 package only, -40°C to +85°C range. | No PDIP option; wider temp range but higher cost and no leaded variant. | Choose for extended-temperature industrial deployments where RoHS compliance and surface-mount are mandatory. |
Compared with TPS3808G01DBVR and ADM6713ARZ-46, the MAX702CPA+ offers lowest BOM cost and simplest integration for legacy +5V designs using through-hole assembly, while maintaining proven reliability in commercial-temperature instrumentation and controller applications.
Availability
MAX702CPA+ is available at Aetrix Electronics and suitable for industrial PLC controllers, embedded data acquisition systems, medical diagnostic instruments, and networked point-of-sale terminals requiring stable component supply across multi-year production cycles.
Supply support for MAX702CPA+ 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, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX700/MAX701/MAX702 family was engineered specifically for cost-sensitive, +5V microprocessor systems needing dependable power-on reset and brownout protection without external components.
FAQ
What is the reset threshold voltage of the MAX702CPA+?
The MAX702CPA+ features a factory-trimmed reset threshold of 4.65V, with a tolerance of ±150mV over the full 0°C to +70°C temperature range. This value is guaranteed at power-up and power-down, ensuring consistent reset activation before +5V supply instability affects downstream logic. The MAX702CPA+ does not support threshold adjustment-its sensing is fixed to VCC only.
Does the MAX702CPA+ require external components to operate with a +5V supply?
No, the MAX702CPA+ requires zero external components when used with a +5V supply. Its internal voltage reference, comparator, and reset timer eliminate the need for resistive dividers, capacitors, or pull-up resistors. The debounced MR input includes an internal 5µA pullup, allowing direct connection to a momentary switch without additional filtering.
What is the minimum VCC voltage at which the MAX702CPA+ guarantees correct RESET output state?
The MAX702CPA+ guarantees correct RESET output state-including active-low assertion-down to VCC = 1.0V. This behavior is verified across temperature and load conditions, enabling reliable reset signaling during deep brownout events or battery discharge scenarios where VCC falls well below typical µP operating limits.
Can the MAX702CPA+ be used in place of the MAX701CPA or MAX700CPA?
No-the MAX702CPA+ is not a drop-in replacement for MAX701CPA or MAX700CPA. It lacks the RESET (active-high) output present on MAX701CPA and omits the SENSE, CTL, and HYST pins required for adjustable threshold operation in MAX700CPA. Pin compatibility is limited to shared VCC, GND, MR, and RESET; other pins are NC on MAX702CPA but functional on the others.
What package type and RoHS status does the MAX702CPA+ have?
The MAX702CPA+ is supplied in an 8-pin plastic dual-inline package (PDIP) with lead(Pb)-free termination, indicated by the "+" suffix. It meets RoHS Directive 2011/65/EU and is rated for commercial temperature operation (0°C to +70°C). The package outline conforms to Maxim's P8+2 standard (outline 21-0143).
MAX702CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX702CPA+ FAQ
1.How can I place an order for MAX702CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX702CPA+ 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 MAX702CPA+ reliable?
The price and inventory of MAX702CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX702CPA+ is usually 5 days.
3.What payment methods are accepted for MAX702CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX702CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX702CPA+?
MAX702CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX702CPA+ 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 MAX702CPA+?
For technical support, including MAX702CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX702CPA+ requirements.
6.How does Aetrix verify that MAX702CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX702CPA+ 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 MAX702CPA+ meets industry standards.
7.What is the process for return or replacement of MAX702CPA+?
All MAX702CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX702CPA+, 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 MAX702CPA+ part is unused and in its original packaging.
Return procedure for MAX702CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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