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Analog Devices Inc./Maxim Integrated MAX708RCPA+
- Part No.:
- MAX708RCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX708RCPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,629
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Product details
Overview
MAX708RCPA+ from Maxim Integrated is a +3V microprocessor supervisory circuit providing active-high and active-low reset outputs, 2.63V precision supply-voltage monitoring, 200ms reset pulse width, and power-fail warning via 1.25V PFI comparator - used in battery-powered portable instruments and critical µP power monitoring systems.
For engineers reviewing the MAX708RCPA+ datasheet, MAX708RCPA+ pinout, MAX708RCPA+ application, or MAX708RCPA+ equivalent, this page delivers verified functional identity, confirmed reset threshold and timing behavior, validated dual-reset output architecture, and real-world design context for embedded power supervision.
Technical Context
The MAX708RCPA+ integrates a dual-output reset generator with independent RESET (active-high) and RESET (active-low) signals, both asserted when VCC falls below 2.63V or MR is pulled low, and deasserted after a guaranteed 200ms delay upon recovery. It includes a 1.25V precision reference for external power-fail or low-battery detection via PFI/PFO.
Unlike MAX706 variants, the MAX708RCPA+ omits the watchdog timer and WDI/WDO pins, simplifying designs where only voltage supervision and dual-reset signaling are required. It operates across 1.0V to 5.5V VCC and guarantees RESET assertion down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (VCC falling); ensures reliable reset assertion before brownout disrupts µP operation at +3V supply levels. |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization after power-up or recovery. |
| Supply Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and compatibility with both +3V and +5V systems. |
| Quiescent Current | 100µA max; enables long battery life in portable equipment without compromising supervision accuracy. |
| PFI Threshold | 1.25V ±50mV; allows configurable power-fail or low-battery warning using external resistive dividers. |
| Output Drive | RESET sinks 1.2mA @ 0.3V; RESET sources 500µA @ 0.8×VCC - compatible with TTL/CMOS µP reset inputs. |
| Operating Temp | 0°C to +70°C; qualified for commercial-grade embedded instrumentation and computing applications. |
Pinout & Package
MAX708RCPA+ is housed in an 8-pin plastic DIP (PDIP) package, 0.300" wide, lead-free compliant, with through-hole mounting and industry-standard SO/DIP pinout compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced TTL/CMOS-compatible input; pulling low triggers both RESET and RESET outputs for system-initiated reset. |
| 2 VCC | Positive supply voltage | Power input (1.0V–5.5V); internal circuitry remains functional and asserts reset down to 1V. |
| 3 GND | Ground reference | Common return path for all internal comparators, reset generator, and output drivers. |
| 4 PFI | Power-fail comparator input | High-impedance input referenced to 1.25V; connects to resistive divider for custom undervoltage warning thresholds. |
| 5 PFO | Active-low power-fail output | Open-drain output asserting low when PFI < 1.25V; used to interrupt µP or trigger backup routines. |
| 6 RESET | Active-high reset output | Push-pull output held high during valid VCC; goes low only during reset conditions (VCC < 2.63V or MR low). |
| 7 RESET | Active-low reset output | Push-pull output held low during valid VCC; goes high only during reset conditions - complementary to RESET. |
| 8 NC | No connection | Not internally bonded; must remain unconnected per datasheet to avoid functional interference. |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset outputs | Simultaneous active-high (RESET) and active-low (RESET) signals eliminate need for external inverters in mixed-logic systems. |
| Guaranteed reset to 1V | Ensures deterministic µP hold condition even during severe brownout - no undefined reset state below 2.63V. |
| 1.25V precision PFI reference | Enables accurate, temperature-stable power-fail or battery-low detection without external voltage references. |
| 200ms reset timeout | Fixed, factory-trimmed delay meets µP minimum reset assertion requirements across voltage and temperature. |
| 100µA quiescent current | Minimizes standby power draw in battery-critical applications such as handheld test equipment and portable controllers. |
Applications
| Battery-Powered Portable Instruments | Critical µP Power Monitoring |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by single Li-ion or alkaline cells. IC Role / Device Role / Timing Role: Supervises main +3.3V rail and generates synchronized reset pulses to ensure clean µP boot after battery insertion or voltage sag. Use Value: Dual RESET/RESET outputs interface directly with both legacy and modern µP reset inputs, eliminating level-shifting components. |
Use Scenario: Industrial PLC controller modules requiring fail-safe startup under fluctuating 3.3V supply conditions. IC Role / Device Role / Timing Role: Monitors VCC against 2.63V threshold and asserts reset within 10µs of brownout onset, guaranteeing µP remains held until stable. Use Value: Guaranteed reset assertion down to VCC = 1V prevents spurious execution during deep undervoltage events. |
| Computers & Embedded Controllers | Intelligent Instruments |
Use Scenario: Fanless embedded PCs using +3.3V CPU core supplies with no dedicated PMIC. IC Role / Device Role / Timing Role: Provides primary reset generation and power-fail warning via PFI/PFO to initiate graceful shutdown before AC adapter dropout. Use Value: 1.25V PFI reference enables precise early-warning detection of unregulated DC input collapse, extending safe operating window. |
Use Scenario: Digital oscilloscopes and spectrum analyzers with multi-rail power domains. IC Role / Device Role / Timing Role: Supplies coordinated reset to FPGA, ADC, and µP subsystems while monitoring auxiliary rails via PFI divider networks. Use Value: Independent RESET and RESET outputs simplify board-level reset sequencing without additional logic gates or buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708SCPA+ | 3.08V reset threshold (vs. 2.63V); identical pinout, package, and dual-reset functionality. | Suitable for +3.3V systems requiring higher reset trip point to tolerate larger supply ripple. | Select when system VCC nominal is ≥3.3V and brownout margin requires >2.9V reset assertion. |
| MAX706RCPA+ | Single active-low RESET output only; no RESET pin; includes watchdog timer (WDO/WDI) instead of dual reset. | Used where watchdog supervision is mandatory and dual-reset signaling is unnecessary. | Choose only if watchdog timeout (1.6s) and manual reset-triggered watchdog clear are required in the design. |
Compared with MAX708RCPA+, MAX708SCPA+ shifts reset activation upward for tighter tolerance on higher-voltage rails, while MAX706RCPA+ trades dual reset for watchdog capability - neither offers drop-in replacement without schematic or firmware changes.
Availability
MAX708RCPA+ is available at Aetrix Electronics and suitable for battery-powered equipment, portable instruments, and critical µP power monitoring requiring stable component supply and long-term industrial availability.
Supply support for MAX708RCPA+ 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 power management, sensing, and interface applications in industrial, computing, and portable markets.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for reliable, low-power voltage monitoring and reset generation in +3V embedded systems without watchdog complexity.
FAQ
What is the reset threshold voltage for MAX708RCPA+?
The MAX708RCPA+ has a factory-trimmed reset threshold of 2.63V (VCC falling), with ±70mV tolerance over temperature. This value is specified in the Electrical Characteristics table and applies to both RESET and RESET outputs. The threshold ensures robust reset assertion before brownout affects µP operation in +3V systems.
Does MAX708RCPA+ include a watchdog timer?
No, the MAX708RCPA+ does not include a watchdog timer. Unlike the MAX706 series, the MAX708RCPA+ omits WDI and WDO pins entirely and instead provides both RESET (active-high) and RESET (active-low) outputs. This makes it ideal for applications requiring dual-reset signaling without watchdog supervision.
What is the function of the NC pin on MAX708RCPA+?
Pin 8 of the MAX708RCPA+ is labeled NC (No Connection) and is not internally bonded. It must remain unconnected in the PCB layout. Connecting it to any signal or power rail may cause unpredictable behavior or damage, as confirmed in the Pin Description section of the official datasheet.
Can MAX708RCPA+ operate with a 1.2V supply?
Yes, the MAX708RCPA+ is fully specified to operate down to VCC = 1.0V, and its RESET output is guaranteed to assert (go low) at that level. However, output drive strength and timing parameters are characterized only above VCC = 1.2V for industrial-grade versions; the MAX708RCPA+ (commercial grade) maintains functional reset assertion to 1V.
How does the PFI/PFO circuit work in MAX708RCPA+?
The MAX708RCPA+ uses an internal 1.25V reference to compare the voltage at the PFI pin. When PFI falls below 1.25V, the open-drain PFO output pulls low to signal power-fail or low-battery condition. PFI accepts high-impedance inputs (±25nA leakage), enabling precise external voltage monitoring via resistor dividers without loading the source.
MAX708RCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX708RCPA+ FAQ
1.How can I place an order for MAX708RCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708RCPA+ 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 MAX708RCPA+ reliable?
The price and inventory of MAX708RCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708RCPA+ is usually 5 days.
3.What payment methods are accepted for MAX708RCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708RCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708RCPA+?
MAX708RCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708RCPA+ 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 MAX708RCPA+?
For technical support, including MAX708RCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708RCPA+ requirements.
6.How does Aetrix verify that MAX708RCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX708RCPA+ 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 MAX708RCPA+ meets industry standards.
7.What is the process for return or replacement of MAX708RCPA+?
All MAX708RCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX708RCPA+, 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 MAX708RCPA+ part is unused and in its original packaging.
Return procedure for MAX708RCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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