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Analog Devices Inc./Maxim Integrated MAX706CSA
- Part No.:
- MAX706CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706CSA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,904
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Product details
Overview
The MAX706CSA from Maxim Integrated is a microprocessor supervisory circuit in 8-pin SO package, providing active-low reset output, 1.6s watchdog timeout, 4.40V supply-voltage monitor threshold, 1.25V power-fail comparator input, and debounced manual-reset input - used to ensure reliable boot and brownout recovery in embedded controllers and industrial instrumentation.
For engineers reviewing the MAX706CSA datasheet, MAX706CSA pinout, MAX706CSA application, or MAX706CSA equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Maxim's official specifications for the MAX706 family at commercial temperature range (0°C to +70°C).
Technical Context
The MAX706CSA integrates four core supervisory functions: a precision voltage monitor with 4.40V reset threshold and 40mV hysteresis, a 1.6s watchdog timer with edge-sensitive WDI input, a 1.25V reference-based power-fail comparator (PFI/PFO), and a TTL/CMOS-compatible manual-reset input with internal 250µA pull-up. All outputs are push-pull and guaranteed functional down to VCC = 1V.
Its reset generator asserts RESET low for ≥140ms (typ. 200ms) after VCC rises above threshold or MR release, and maintains valid logic levels during brownout - with RESET remaining low until VCC drops below 1V. The watchdog output (WDO) goes low on timeout or VCC undervoltage, but lacks minimum pulse width guarantee unlike RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40V ±0.15V - triggers reset when +5V supply dips below safe operating level for most 5V µPs. |
| Reset Pulse Width | 200ms typ. - ensures sufficient duration to fully initialize microcontrollers before releasing reset. |
| Watchdog Timeout | 1.6s ±0.65s - provides deterministic time window for firmware to service watchdog and avoid unintended reset. |
| Power-Fail Threshold | 1.25V ±0.05V - enables early warning of supply degradation via external resistor divider on PFI. |
| Supply Current | 350µA max at +70°C - supports low-power operation in battery-backed or energy-constrained systems. |
| Operating Voltage Range | 1.0V to 5.5V - guarantees RESET validity even during deep brownout, critical for graceful shutdown. |
| Manual-Reset Input | Debounced by ≥140ms internal timing - eliminates need for external RC filtering in pushbutton interfaces. |
Pinout & Package
MAX706CSA is housed in an 8-pin Small Outline (SO) package, RoHS-compliant, with standard 1.27mm pitch and JEDEC MS-012AC outline. Pin 1 is marked with dot or bevel; device orientation follows standard SO top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-Low Manual-Reset Input | Drives reset pulse when pulled below 0.8V; internally pulled up with 250µA current for switch interface. |
| 2 (VCC) | +5V Supply Input | Primary power rail; all supervisory functions referenced to this pin; operates down to 1.0V. |
| 3 (GND) | Ground Reference | Common return for VCC, PFI, MR, and all outputs; must be low-impedance for noise immunity. |
| 4 (PFI) | Power-Fail Monitor Input | Compares external voltage (e.g., from resistor divider) against 1.25V internal reference. |
| 5 (PFO) | Power-Fail Output | Open-drain compatible active-low output; sinks current when PFI < 1.25V - used for NMI or interrupt. |
| 6 (WDI) | Watchdog Input | Edge-triggered input; toggling required every ≤1.6s to prevent WDO assertion; floating disables watchdog. |
| 7 (RESET) | Active-Low Reset Output | Push-pull output; guaranteed low (≤0.4V) at VCC ≥1V; pulses low for 200ms on power-up/brownout/MR. |
| 8 (WDO) | Watchdog Output | Push-pull active-low output; goes low on timeout or VCC undervoltage; no minimum pulse width guarantee. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET Validity at VCC = 1V | Enables robust reset assertion during deep brownout, supporting fail-safe shutdown in 5V systems. |
| Integrated 1.25V Precision Reference | Allows accurate monitoring of auxiliary supplies (e.g., +12V, -5V) using external resistor dividers on PFI. |
| Debounced Manual-Reset Input | Eliminates need for external hardware debounce circuitry - simplifies PCB layout and reduces BOM count. |
| Independent Watchdog and Power-Fail Outputs | WDO and PFO provide separate fault signals for distinct system responses (e.g., NMI vs. data save). |
| 40mV Reset Threshold Hysteresis | Prevents oscillation during slow VCC ramp-up/down, ensuring clean, single-pulse reset behavior. |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
|
Use Scenario: Real-time control logic in programmable logic controllers where unexpected resets must be avoided during voltage sags. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET during brownout and generating watchdog timeout if firmware hangs. Use Value: Prevents corrupted I/O states and ensures deterministic restart - meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Battery-backed portable ultrasound or ECG units requiring orderly shutdown before main supply collapse. IC Role / Device Role / Timing Role: Monitoring both VCC and backup battery via PFI divider; triggering PFO interrupt for data preservation. Use Value: Enables >200ms of safe processing time before power loss - preserving critical patient waveform data. |
| Telecom Line Cards | Automotive Body Control Modules |
|
Use Scenario: Hot-swap power management in carrier-grade line cards exposed to transient surges and dips. IC Role / Device Role / Timing Role: Providing 4.40V reset threshold aligned with +5V LDO tolerance; WDO tied to MR for self-recovery. Use Value: Eliminates need for external reset supervisor IC - reducing footprint while maintaining AEC-Q100 Class 2 margin. |
Use Scenario: Low-voltage detection in 12V automotive subsystems where ignition transients cause momentary dips. IC Role / Device Role / Timing Role: Using PFI to monitor switched 12V rail via resistor network; asserting PFO to wake microcontroller for diagnostics. Use Value: Detects supply degradation ≥100ms before brownout - enabling preemptive error logging per ISO 16750-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706CPA | Same electrical specs and functionality, but in 8-pin PDIP package instead of SO. | Preferred for through-hole prototyping or legacy board rework where SO footprint unavailable. | Select MAX706CPA only when DIP mounting is required; identical timing and thresholds apply. |
| MAX706CUA | Identical supervisory functions and thresholds, but in space-saving 8-pin µMAX (3mm × 3mm) package. | Suitable for compact designs like handheld test equipment where board area is constrained. | Choose MAX706CUA for high-density layouts; same pinout mapping but different thermal and soldering profile. |
Compared with MAX706CPA and MAX706CUA, the MAX706CSA offers the optimal balance of surface-mount compatibility, thermal performance (471mW dissipation), and industry-standard SO footprint - making it the default choice for new production designs targeting volume manufacturing and automated assembly.
Availability
MAX706CSA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom line cards, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for MAX706CSA 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 analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX705–MAX708 family was designed specifically for cost-sensitive, high-reliability microprocessor supervision - delivering integrated reset, watchdog, power-fail, and manual-reset functions in minimal footprint.
FAQ
What is the reset threshold voltage for MAX706CSA?
The MAX706CSA has a nominal reset threshold of 4.40V, with guaranteed limits of 4.25V (min) and 4.50V (max) over the full operating temperature range. This threshold is factory-trimmed and applies specifically to the MAX706 variant - distinguishing it from the 4.65V threshold of the MAX705 series. The 40mV hysteresis prevents chatter during slow VCC transitions.
Does MAX706CSA support active-high reset output?
No, the MAX706CSA provides only an active-low RESET output (pin 7) and active-low WDO output (pin 8). Active-high reset is available only on MAX707/MAX708/MAX813L variants. For applications requiring active-high reset, MAX707CSA or MAX813LCSA must be selected - MAX706CSA does not include the complementary RESET output.
Can MAX706CSA monitor voltages other than +5V?
Yes, the MAX706CSA can monitor auxiliary supplies using its PFI input and internal 1.25V reference. By connecting a resistor divider from the target voltage (e.g., +12V or -5V) to PFI, the device asserts PFO when the divided voltage falls below 1.25V. The MAX706CSA datasheet provides design examples for both positive and negative rail monitoring.
What is the watchdog timeout period for MAX706CSA?
The MAX706CSA features a fixed watchdog timeout period of 1.6 seconds, with typical value 1.60s and guaranteed range of 1.00s to 2.25s over temperature and supply. The watchdog timer clears on any rising or falling edge at WDI (pin 6), and is also cleared automatically during RESET assertion or when WDI is three-stated.
Is MAX706CSA RoHS-compliant and lead-free?
Yes, the MAX706CSA is available in lead(Pb)-free/RoHS-compliant packaging. Per Maxim's ordering information, the standard SO package (S8+2) is RoHS-compliant by default; no "+" suffix is required for lead-free compliance in this variant. Full compliance documentation and material declarations are available from Analog Devices' product page for MAX706CSA.
MAX706CSA 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:
- 4.4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX706CSA FAQ
1.How can I place an order for MAX706CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706CSA 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 MAX706CSA reliable?
The price and inventory of MAX706CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706CSA is usually 5 days.
3.What payment methods are accepted for MAX706CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706CSA?
MAX706CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706CSA 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 MAX706CSA?
For technical support, including MAX706CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706CSA requirements.
6.How does Aetrix verify that MAX706CSA is sourced from the original manufacturer or authorized distributors?
All MAX706CSA 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 MAX706CSA meets industry standards.
7.What is the process for return or replacement of MAX706CSA?
All MAX706CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX706CSA, 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 MAX706CSA part is unused and in its original packaging.
Return procedure for MAX706CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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