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Analog Devices Inc./Maxim Integrated MAX707EPA+
- Part No.:
- MAX707EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX707EPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,991
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Product details
Overview
MAX707EPA+ from Maxim Integrated is a precision microprocessor supervisory circuit in 8-pin PDIP package, providing active-high RESET output, 4.65V supply-voltage monitoring, 1.25V power-fail comparator input, and manual-reset input-designed for reliable reset assertion during power-up, brownout, and system fault conditions in embedded controllers and industrial instrumentation.
For engineers reviewing the MAX707EPA+ datasheet, MAX707EPA+ pinout, MAX707EPA+ application, or MAX707EPA+ equivalent, this page delivers verified functional identity, exact reset threshold (4.65V), guaranteed RESET validity down to VCC = 1.2V, 200ms reset pulse width, and confirmed compatibility with TTL/CMOS logic interfaces and +5V µP systems.
Technical Context
The MAX707EPA+ integrates a precision bandgap-based voltage monitor with 40mV hysteresis, a debounced manual-reset input with 250µA internal pull-up, and a 1.25V reference-comparator for external power-fail or low-battery detection. Its active-high RESET output is fully specified from VCC = 1.2V to 5.5V, ensuring deterministic behavior across wide supply transients.
Unlike watchdog-equipped variants (e.g., MAX705), the MAX707EPA+ replaces the watchdog timer with a second reset output (RESET), delivering complementary active-low and active-high reset signals-enabling direct interface with µPs requiring either polarity, such as Intel 80C51 or Motorola 68HC11 families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV - triggers reset when +5V rail drops below nominal regulation limit, preventing code execution during brownout. |
| Reset Pulse Width | 200ms (min) - ensures sufficient duration to fully initialize µP and peripheral clocks before release. |
| Supply Voltage Range | 1.2V to 5.5V - guarantees RESET output validity even during deep brownout or battery-backed operation. |
| Power-Fail Input Threshold | 1.25V ±50mV - enables accurate early-warning detection of failing +5V, +12V, or negative rails via external divider. |
| Manual-Reset Input Current | 250µA pull-up - allows direct connection to pushbutton switches without external biasing components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments including factory automation and outdoor instrumentation. |
| Package | 8-pin Plastic DIP (PDIP) - through-hole compatible for prototyping, legacy board repair, and high-reliability solder-joint applications. |
Pinout & Package
MAX707EPA+ uses an 8-pin plastic dual in-line package (PDIP) with standard 0.3-inch body width and 0.1-inch pin pitch. Pin 1 is marked by a notch or dot; leads are tin-lead (leaded) unless specified with '+' suffix for RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual-Reset Input | Active-low TTL/CMOS-compatible input; internally pulled up at 250µA; asserts both RESET and RESET on falling edge. |
| 2 VCC | +5V Supply Input | Primary power rail; RESET outputs remain valid down to 1.2V, enabling brownout-safe operation. |
| 3 GND | Ground Reference | Common return for all analog and digital functions; must be low-impedance for stable comparator reference. |
| 4 PFI | Power-Fail Input | High-impedance (±25nA) comparator input referenced to 1.25V; used for external voltage monitoring. |
| 5 PFO | Power-Fail Output | Open-drain active-low output; sinks current when PFI < 1.25V; can drive interrupt lines or external logic. |
| 6 RESET | Active-High Reset Output | CMOS-compatible output; complements RESET; asserted high during reset condition and VCC undervoltage. |
| 7 RESET | Active-Low Reset Output | Guaranteed logic low ≤0.4V at 1.2mA sink; meets µP reset timing requirements across full temperature range. |
| 8 WDO | Watchdog Output | Not present - MAX707EPA+ omits watchdog function; pin 8 is no-connect (N.C.) per official pinout. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET Validity at Low VCC | RESET output remains functional down to VCC = 1.2V, enabling robust reset assertion during battery backup or severe brownout. |
| Dual-Polarity Reset Outputs | Simultaneous active-high (RESET) and active-low (RESET) outputs eliminate need for external inverters in mixed-logic systems. |
| Debounced Manual-Reset Interface | 250µA internal pull-up and 140ms minimum pulse width provide hardware-level switch bounce immunity without external RC networks. |
| Precision Power-Fail Comparator | 1.25V ±50mV reference enables accurate early-warning detection of supply degradation across multiple rails using simple resistor dividers. |
| Industrial Temperature Range | -40°C to +85°C operation supports deployment in harsh environments including motor drives, PLCs, and remote sensors. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Main controller board in programmable logic controller subjected to 24V DC field power fluctuations and EMI-rich factory floor environment. IC Role / Device Role / Timing Role: Supervisory IC asserting both RESET and RESET to initialize ARM Cortex-M7 core and FPGA configuration logic upon power stabilization. Use Value: 4.65V reset threshold prevents spurious resets during transient dips; dual-polarity outputs ensure compatibility with mixed-voltage I/O banks on FPGA and µP. |
Use Scenario: Portable ultrasound unit powered by Li-ion battery with regulated +5V and +12V rails feeding analog front-end and display subsystems. IC Role / Device Role / Timing Role: Monitoring both +5V and +12V rails via PFI divider network; triggering orderly shutdown via PFO interrupt before battery depletion. Use Value: 1.25V comparator reference enables precise cross-rail fail detection; 200ms reset pulse guarantees full ADC calibration and memory save before power loss. |
| Smart Energy Meter | Ruggedized Data Logger |
Use Scenario: ANSI C12.20-certified electricity meter operating in outdoor enclosures with wide ambient temperature swings and lightning-induced surges. IC Role / Device Role / Timing Role: Providing fail-safe reset to metrology SoC during AC line sags and capacitor discharge events; interfacing with isolated RS-485 transceiver. Use Value: -40°C to +85°C rating ensures reliability across climatic zones; 40mV hysteresis prevents chatter during slow VCC recovery after brownout. |
Use Scenario: Environmental sensor node deployed in unheated substations, logging temperature/humidity over extended periods on primary battery. IC Role / Device Role / Timing Role: Detecting end-of-life battery voltage drop via PFI; asserting RESET to halt non-critical peripherals and preserve flash write integrity. Use Value: Valid RESET operation down to VCC = 1.2V extends usable battery life; low 50µA typical supply current minimizes standby drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CPA | Same functionality and pinout, but rated for 0°C to +70°C commercial temperature range. | Suitable only for indoor, climate-controlled equipment-not for industrial or outdoor deployments. | Select MAX707CPA only if ambient operating temperature stays within 0–70°C and cost sensitivity outweighs environmental robustness. |
| MAX813LEPA+ | Includes watchdog timer (1.6s timeout) and active-high RESET, but lacks active-low RESET output; PFI/PFO identical. | Enables watchdog-based system recovery but requires external inverter or logic to generate active-low reset signal. | Choose MAX813LEPA+ when watchdog supervision is mandatory and dual-reset polarity is not required. |
Compared with MAX707EPA+, MAX707CPA offers lower cost but reduced thermal margin, while MAX813LEPA+ adds watchdog capability at the expense of losing dedicated active-low RESET-making MAX707EPA+ optimal for dual-polarity reset-critical industrial control designs.
Availability
MAX707EPA+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, smart energy meters, and ruggedized data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX707EPA+ 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) is a semiconductor design and manufacturing leader specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX705–MAX708 family was engineered to replace discrete reset circuits in µP-based systems-delivering integrated voltage monitoring, manual reset, and power-fail warning in compact packages for space-constrained embedded applications.
FAQ
What is the reset threshold voltage for MAX707EPA+?
The MAX707EPA+ has a nominal reset threshold of 4.65V with ±150mV tolerance over temperature. This value is guaranteed across the full -40°C to +85°C operating range and triggers a 200ms reset pulse whenever VCC falls below this level, ensuring reliable µP initialization during brownout conditions.
Does MAX707EPA+ include a watchdog timer?
No, the MAX707EPA+ does not include a watchdog timer. It substitutes the watchdog function found in MAX705/MAX706 with a second reset output (RESET), providing complementary active-high and active-low reset signals. Pin 8 (WDO) is no-connect (N.C.) in MAX707EPA+.
Can MAX707EPA+ monitor voltages other than +5V?
Yes, MAX707EPA+ can monitor any DC voltage via its PFI pin using an external resistor divider. The internal 1.25V comparator reference allows precise detection of supply degradation on +12V, +3.3V, or even negative rails-enabling early-warning power-fail signaling across multi-rail systems.
What is the minimum supply voltage at which MAX707EPA+ guarantees RESET output validity?
The MAX707EPA+ guarantees RESET output validity down to VCC = 1.2V, with RESET remaining a valid logic high (≤0.4V low-state for RESET) even during deep brownout. This specification supports battery-backed operation and graceful shutdown in energy-constrained systems.
Is MAX707EPA+ RoHS-compliant?
Yes, MAX707EPA+ is RoHS-compliant and lead-free. The '+' suffix in the part number explicitly denotes lead-free/RoHS-compliant packaging per Maxim Integrated's ordering convention, with tin-silver-copper (SAC) solder finish and compliant substrate materials.
MAX707EPA+ 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, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX707EPA+ FAQ
1.How can I place an order for MAX707EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX707EPA+ 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 MAX707EPA+ reliable?
The price and inventory of MAX707EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX707EPA+ is usually 5 days.
3.What payment methods are accepted for MAX707EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX707EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX707EPA+?
MAX707EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX707EPA+ 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 MAX707EPA+?
For technical support, including MAX707EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX707EPA+ requirements.
6.How does Aetrix verify that MAX707EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX707EPA+ 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 MAX707EPA+ meets industry standards.
7.What is the process for return or replacement of MAX707EPA+?
All MAX707EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX707EPA+, 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 MAX707EPA+ part is unused and in its original packaging.
Return procedure for MAX707EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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