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Analog Devices Inc./Maxim Integrated MAX706PCSA
- Part No.:
- MAX706PCSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706PCSA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,316
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Product details
Overview
MAX706PCSA from Maxim Integrated is an active-high reset, +3V microprocessor supervisory circuit in 8-pin SO package, providing power-up/down/brownout reset (200ms delay), 1.6s watchdog timer, 1.25V power-fail comparator input, and debounced manual-reset input. It operates from 2.7V to 5.5V and guarantees RESET assertion down to VCC = 1V, used in battery-powered portable instruments and embedded controllers requiring reliable power monitoring.
For engineers reviewing the MAX706PCSA datasheet, MAX706PCSA pinout, MAX706PCSA application, or MAX706PCSA equivalent, this page delivers verified functional identity, confirmed SO-8 pin mapping, exact reset threshold (2.63V), watchdog timeout (1.6s), and validated alternatives for +3V µP supervision with active-high reset output.
Technical Context
The MAX706PCSA implements a precision voltage-monitoring architecture with a dedicated 2.63V reset threshold detector and internal 200ms reset timer. Its watchdog circuit requires WDI toggling within 1.6s to prevent WDO assertion, and the WDI input disables automatically when left open or connected to a high-impedance tri-state output (leakage <600nA).
It integrates a 1.25V reference-based power-fail comparator (PFI/PFO) with 10mV hysteresis and supports TTL/CMOS-compatible MR input with 500ns minimum pulse width at 3V. RESET remains active high during VCC < 2.63V or MR low, deasserting only after VCC exceeds threshold and 200ms elapses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (VCC falling); ensures reliable reset initiation before µP supply dropout in +3V systems |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±0.65s; detects µP lockup without requiring external timing components |
| Supply Current | 100µA typical at VCC = 3.0V; enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V ±0.05V; enables accurate low-battery warning or auxiliary supply monitoring via PFI divider |
| Operating Voltage Range | 2.7V to 5.5V; supports dual-supply operation from +3V batteries or +5V wall adapters |
| Guaranteed RESET Assertion | Down to VCC = 1V; ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
MAX706PCSA is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, lead-free compatible, with 1.27mm pitch and JEDEC MS-012AC outline.
| 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 2.7V–5.5V; powers all internal circuits including reset generator, watchdog, and comparator |
| 3 GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance for noise immunity |
| 4 PFI | Power-fail comparator input | High-impedance node referenced to internal 1.25V; connects to resistive divider for custom trip-point setting |
| 5 PFO | Active-low power-fail output | Sinks current when PFI < 1.25V; used to signal early power failure or low-battery condition to µP interrupt |
| 6 WDI | Watchdog input | Edge-sensitive; toggling required every 1.6s; watchdog disables automatically if left open or driven high-Z |
| 7 RESET | Active-high reset output | Drives µP reset pin high during fault; remains asserted ≥200ms after VCC recovery or MR release |
| 8 WDO | Active-low watchdog output | Asserts low on watchdog timeout or VCC drop; resets only on WDI edge or VCC rise above threshold |
Key Features
| Feature | Design Value |
|---|---|
| Active-high RESET output | Eliminates need for external inverter in µP designs requiring high-active reset assertion |
| WDI auto-disable function | Prevents spurious watchdog timeouts during µP reset or tri-state I/O states without software intervention |
| 1.25V precision PFI reference | Enables accurate, temperature-stable power-fail detection across -40°C to +85°C operating range |
| 200ms factory-trimmed reset delay | Guarantees µP core and peripherals stabilize before release; no external RC component required |
| 100µA quiescent current | Extends battery runtime in always-on portable instrumentation without compromising supervision integrity |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers with Brownout Resilience |
|---|---|
Use Scenario: Handheld multimeter powered by two AA cells, requiring stable reset during battery depletion and cold-start. IC Role / Device Role / Timing Role: Supervisory IC providing active-high RESET, 2.63V threshold monitoring, and 1.25V PFI-based low-battery warning. Use Value: Guarantees µP reset assertion down to VCC = 1V and enables graceful shutdown via PFO interrupt before battery exhaustion. |
Use Scenario: PLC I/O module operating in factory environments with fluctuating 3.3V rail due to EMI and load transients. IC Role / Device Role / Timing Role: Primary power supervisor detecting brownouts and asserting RESET to halt firmware execution during voltage sags. Use Value: 200ms reset pulse prevents metastability in state machines; watchdog monitors firmware liveness independent of power events. |
| Embedded Systems with Dual-Supply Flexibility | Intelligent Sensors with Early Power-Fail Warning |
Use Scenario: Field-deployable environmental sensor node powered from either 3.3V Li-ion or 5V USB adapter. IC Role / Device Role / Timing Role: Unified supervision solution supporting both supply voltages with identical 2.63V reset threshold and 1.6s watchdog. Use Value: Eliminates BOM duplication; maintains consistent reset behavior regardless of input source, simplifying firmware validation. |
Use Scenario: Smart meter with backup supercapacitor, needing advance warning before main supply collapse. IC Role / Device Role / Timing Role: PFI input monitors unregulated DC bus via resistor divider; PFO triggers µP NMI for data save and capacitor charge management. Use Value: 10mV comparator hysteresis prevents chatter near trip point; 1.25V reference ensures repeatable 50ms warning margin before regulator dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SCSA | Active-low RESET output; 2.93V reset threshold (vs. 2.63V) | Requires µP with active-low reset input; higher threshold suits 3.3V systems with tighter margins | Select when system design mandates active-low reset assertion and operates near 3.3V nominal supply |
| MAX706APCSA | Identical package and pinout; adds WDI auto-disable feature (watchdog disables when WDI open) | Reduces risk of false watchdog timeout during µP reset or I/O tristate; same 2.63V threshold | Preferred for new designs where µP I/O states may float during boot or sleep; drop-in replacement with enhanced robustness |
Compared with MAX706SCSA and MAX706APCSA, the MAX706PCSA offers the lowest reset threshold (2.63V) among SO-8 variants and guarantees active-high RESET without requiring external logic - critical for legacy µPs with high-active reset inputs and marginal battery discharge profiles.
Availability
MAX706PCSA is available at Aetrix Electronics and suitable for battery-powered portable instruments, industrial controllers, and embedded systems requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX706PCSA 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, communications, and consumer applications.
The MAX706 family was designed specifically for cost-sensitive, space-constrained microprocessor systems requiring integrated voltage monitoring, reset generation, watchdog supervision, and power-fail warning in a single 8-pin package.
FAQ
What is the reset threshold voltage of the MAX706PCSA?
The MAX706PCSA has a factory-trimmed reset threshold of 2.63V (VCC falling), with ±70mV tolerance over temperature. This value is specified for operation from 2.7V to 5.5V supply and ensures reliable reset assertion before most +3V µPs lose functional stability. The MAX706PCSA maintains this exact threshold across its 0°C to +70°C commercial temperature range.
Does the MAX706PCSA provide active-high or active-low reset output?
The MAX706PCSA provides an active-high RESET output (pin 7), distinguishing it from the MAX706R/S/T series which offer active-low RESET. This eliminates the need for an external inverter when interfacing with µPs that require high-asserted reset signals, simplifying PCB layout and reducing component count in compact designs using the MAX706PCSA.
What is the watchdog timeout period for the MAX706PCSA?
The MAX706PCSA features a fixed 1.6s watchdog timeout period, with ±0.65s variation over temperature and supply voltage. A rising or falling edge on WDI (pin 6) resets the timer; failure to toggle within this window causes WDO (pin 8) to assert low. Unlike the MAX706AP variant, the MAX706PCSA watchdog cannot be disabled - it remains fully active whenever VCC is valid.
Can the MAX706PCSA monitor a secondary power supply like +12V?
Yes - the MAX706PCSA's PFI (pin 4) input accepts externally derived voltages via a resistive divider. By scaling a +12V rail to ≤1.25V at PFI, the device triggers PFO (pin 5) low when the 12V supply drops below the calculated trip point. This enables early-warning power-fail detection for auxiliary rails while the MAX706PCSA continues supervising the primary +3V µP supply.
What package type and footprint does the MAX706PCSA use?
The MAX706PCSA uses an 8-pin SO (Small Outline) package with JEDEC MS-012AC outline, 1.27mm lead pitch, and S8-2 package code. It is surface-mount compatible, RoHS-compliant, and pin-for-pin interchangeable with other MAX706xCSA variants (e.g., MAX706RCSA, MAX706SCSA) in the same SO-8 footprint, enabling flexible design reuse across reset threshold requirements.
MAX706PCSA 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX706PCSA FAQ
1.How can I place an order for MAX706PCSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706PCSA 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 MAX706PCSA reliable?
The price and inventory of MAX706PCSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706PCSA is usually 5 days.
3.What payment methods are accepted for MAX706PCSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706PCSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706PCSA?
MAX706PCSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706PCSA 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 MAX706PCSA?
For technical support, including MAX706PCSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706PCSA requirements.
6.How does Aetrix verify that MAX706PCSA is sourced from the original manufacturer or authorized distributors?
All MAX706PCSA 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 MAX706PCSA meets industry standards.
7.What is the process for return or replacement of MAX706PCSA?
All MAX706PCSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX706PCSA, 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 MAX706PCSA part is unused and in its original packaging.
Return procedure for MAX706PCSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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