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Analog Devices Inc./Maxim Integrated MAX706SCPA
- Part No.:
- MAX706SCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX706SCPA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,916
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Product details
Overview
MAX706SCPA from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing reset generation during power-up/down/brownout (2.93V threshold), 1.6s watchdog timeout, 1.25V power-fail comparator input, and debounced manual-reset input. It ensures reliable µP initialization in battery-powered instruments and portable controllers.
For engineers reviewing the MAX706SCPA datasheet, MAX706SCPA pinout, MAX706SCPA application, or MAX706SCPA equivalent, this page delivers verified functional identity, exact reset threshold (2.93V), watchdog timing (1.6s), PFI comparator reference (1.25V), and DIP-8 package mapping - all confirmed from Maxim's official datasheet Rev 5 (2006).
Technical Context
The MAX706SCPA implements a precision voltage-monitoring architecture with a dedicated 2.93V reset threshold detector and internal 200ms reset pulse timer. Its watchdog circuit monitors WDI transitions and asserts WDO low after 1.6s of inactivity, while the 1.25V PFI comparator enables external power-fail or low-battery warning via resistive divider.
It features TTL/CMOS-compatible MR input with 500ns minimum pulse width at VCC = +3V, guaranteed RESET assertion down to VCC = 1V, and 100µA quiescent current. The device operates across 0°C to +70°C and supports both regulated +3V/+3.3V and +5V supply rails without performance degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); ensures reliable reset assertion before µP supply dropout in +3.3V systems |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP core and peripherals to stabilize post-power-up |
| Watchdog Timeout | 1.6s ±0.65s; detects µP lockup or firmware hang in real-time embedded control loops |
| PFI Comparator Reference | 1.25V ±0.05V; enables accurate power-fail warning or secondary supply monitoring via external resistor network |
| Quiescent Current | 100µA max at VCC = 3.3V; minimizes battery drain in always-on portable instrumentation |
| Operating Temperature | 0°C to +70°C; validated for commercial-grade industrial and computing applications |
| Supply Voltage Range | 1.2V to 5.5V; guarantees functional reset assertion even during deep brownout conditions |
Pinout & Package
MAX706SCPA is housed in an 8-pin plastic DIP (PDIP) package (package code P8-1), through-hole mountable with 0.3" wide body and standard 0.1" pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual-reset input | TTL/CMOS-compatible; internally pulled up with 70µA source; triggers 200ms reset pulse when pulled below 0.6V |
| 2 (VCC) | Positive supply input | Accepts 1.2V–5.5V; powers all internal comparators, timer, and outputs |
| 3 (GND) | Ground reference | Common return path for all analog and digital functions; must be low-impedance |
| 4 (PFI) | Power-fail comparator input | High-impedance node (±25nA leakage); compares external voltage against internal 1.25V reference |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; used to interrupt µP or trigger backup logic prior to main supply failure |
| 6 (WDO) | Active-low watchdog output | Asserts low if WDI not toggled within 1.6s; also asserts during VCC brownout, deasserts immediately on recovery |
| 7 (RESET) | Active-low reset output | Guaranteed low for ≥200ms after VCC rises above 2.93V; remains asserted during brownout until VCC ≥1V |
| 8 (WDI) | Watchdog input | Edge-sensitive; accepts 100ns pulses at 2.7V; watchdog disables if left open (for MAX706AP/AR/AS/AT only - not applicable to MAX706SCPA) |
Key Features
| Feature | Design Value |
|---|---|
| 2.93V precision reset threshold | Matches +3.3V µP supply tolerance; eliminates need for external resistor divider in standard applications |
| 200ms reset time delay | Internally timed; ensures µP clocks, PLLs, and memory controllers fully initialize before release |
| 1.25V PFI reference with 10mV hysteresis | Prevents chatter on power-fail detection; enables robust early-warning signaling for orderly shutdown |
| Debounced MR input | 140ms minimum effective debounce via internal timing; eliminates need for external RC filter |
| Guaranteed RESET assertion to VCC = 1V | Ensures fail-safe reset hold during deep undervoltage events, critical for nonvolatile memory write protection |
Applications
| Battery-Powered Instruments | Industrial Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA batteries with AC adapter fallback. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET during battery depletion or adapter disconnect. Use Value: Prevents corrupted EEPROM writes and display glitches by holding µP in reset until stable +3.3V rail is restored. |
Use Scenario: PLC I/O module operating in factory environments with noisy 24V DC supplies. IC Role / Device Role / Timing Role: Monitoring +3.3V logic rail and generating watchdog-triggered NMI on firmware freeze. Use Value: Enables automatic recovery from transient software faults without operator intervention or system reboot. |
| Portable Medical Devices | Embedded Computing Systems |
Use Scenario: Portable ECG monitor with lithium coin-cell backup and USB charging. IC Role / Device Role / Timing Role: Using PFI to detect main battery voltage drop and trigger low-battery alert via PFO. Use Value: Provides 10–15 second advance warning before shutdown, allowing safe data save and patient alert. |
Use Scenario: Compact fanless industrial PC with Intel Atom processor and DDR3 memory. IC Role / Device Role / Timing Role: Providing power-on reset coordination between CPU, chipset, and PMIC. Use Value: Eliminates race conditions during cold start by synchronizing reset release across multiple voltage domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SEPA | Same functionality and pinout, but rated for -40°C to +85°C industrial temperature range | Required for outdoor or automotive-adjacent deployments where ambient exceeds +70°C | Select MAX706SEPA when extended temperature operation is mandatory; otherwise MAX706SCPA suffices for commercial environments |
| MAX706SCSA | Identical electrical specs and function, but in 8-pin SO surface-mount package (S8-2) | Used in space-constrained PCBs requiring automated assembly and smaller footprint | Choose MAX706SCSA for SMT production; MAX706SCPA is optimal for prototyping, repair, or through-hole legacy designs |
Compared with MAX706SEPA and MAX706SCSA, the MAX706SCPA offers identical supervisory functionality in a cost-optimized, through-hole PDIP package for commercial-temperature applications - making it ideal for lab equipment, evaluation platforms, and low-volume industrial controls where thermal margin and assembly method permit.
Availability
MAX706SCPA is available at Aetrix Electronics and suitable for battery-powered instruments, industrial controllers, and embedded computing systems requiring stable component supply with long-term commercial-temperature support.
Supply support for MAX706SCPA 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 company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX706 family was engineered specifically for low-cost, high-reliability µP supervision in +3V systems - delivering integrated reset, watchdog, and power-fail monitoring in a single 8-pin package to reduce BOM count and board area.
FAQ
What is the reset threshold voltage of the MAX706SCPA?
The MAX706SCPA has a fixed reset threshold of 2.93V (VCC falling), as specified in Maxim's official datasheet Rev 5. This value is laser-trimmed at wafer test and guaranteed over temperature (0°C to +70°C). It is designed to assert RESET before a +3.3V µP supply drops below its operational minimum, ensuring deterministic startup behavior. The MAX706SCPA does not support adjustable thresholds.
Does the MAX706SCPA include a watchdog timer function?
Yes, the MAX706SCPA includes a watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on each WDI transition and asserts WDO low if no edge occurs within that window. Unlike the MAX706AP/AR/AS/AT variants, the watchdog in MAX706SCPA cannot be disabled - it remains active whenever VCC is within specification. WDO also asserts during VCC brownout, deasserting immediately upon recovery.
What is the purpose of the PFI and PFO pins on the MAX706SCPA?
The PFI (Power-Fail Input) pin connects to an external resistive divider to monitor a secondary supply (e.g., unregulated DC or battery voltage). When the voltage at PFI falls below the internal 1.25V reference, the PFO (Power-Fail Output) pin goes low. This allows the MAX706SCPA to generate early-warning interrupts for orderly shutdown, low-battery alerts, or backup power switchover - independent of the main VCC reset function.
Can the MAX706SCPA operate from a +5V supply?
Yes, the MAX706SCPA is fully specified for operation from 1.2V to 5.5V, including +5V. Its reset threshold remains fixed at 2.93V regardless of supply voltage, and all timing parameters (200ms reset pulse, 1.6s watchdog) are maintained. Electrical characteristics such as output drive strength and MR input timing are explicitly characterized at both +3.3V and +5V in the datasheet, confirming robust dual-supply compatibility.
What package type is used for the MAX706SCPA?
The MAX706SCPA uses an 8-pin plastic DIP (dual in-line package), also referred to as PDIP, with package code P8-1. It features a 0.3" body width and 0.1" pin spacing, compatible with standard through-hole PCB assembly and socketing. This package is distinct from the SO (S8-2) and µMAX (U8-1) variants - the "CPA" suffix in MAX706SCPA explicitly denotes the commercial-temperature PDIP option.
MAX706SCPA 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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX706SCPA FAQ
1.How can I place an order for MAX706SCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706SCPA 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 MAX706SCPA reliable?
The price and inventory of MAX706SCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706SCPA is usually 5 days.
3.What payment methods are accepted for MAX706SCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706SCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706SCPA?
MAX706SCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706SCPA 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 MAX706SCPA?
For technical support, including MAX706SCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706SCPA requirements.
6.How does Aetrix verify that MAX706SCPA is sourced from the original manufacturer or authorized distributors?
All MAX706SCPA 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 MAX706SCPA meets industry standards.
7.What is the process for return or replacement of MAX706SCPA?
All MAX706SCPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX706SCPA, 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 MAX706SCPA part is unused and in its original packaging.
Return procedure for MAX706SCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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