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Analog Devices Inc./Maxim Integrated MAX706TCSA+T
- Part No.:
- MAX706TCSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706TCSA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,690
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Product details
Overview
MAX706TCSA+T from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing reset generation (3.08V threshold), 1.6s watchdog timeout, 1.25V power-fail comparator input, and debounced manual-reset input - used in battery-powered instruments and portable controllers requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX706TCSA+T datasheet, MAX706TCSA+T pinout, MAX706TCSA+T application, or MAX706TCSA+T equivalent, this page delivers verified functional identity, confirmed SO-8 package mapping, validated pin roles, exact reset timing (200ms), and two field-validated alternative parts with documented technical differences.
Technical Context
The MAX706TCSA+T implements a precision voltage monitor with fixed 3.08V reset threshold (±1.5% over temperature), integrated 200ms reset timer, and independent watchdog circuit triggered by WDI transitions. Its PFI comparator uses an internal 1.25V reference with 10mV hysteresis for stable power-fail detection.
It features TTL/CMOS-compatible MR input with 500ns minimum pulse width at VCC = 3V, guaranteed RESET assertion down to VCC = 1V, and WDO output that asserts immediately on VCC dropout - distinct from the delayed RESET signal. The device operates across 0°C to +70°C and draws only 100µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely monitors +3.3V supply rails during power-up/down and brownout |
| Reset Pulse Width | 200ms typical - ensures µP initialization completes before release from reset |
| Watchdog Timeout | 1.6s ±40% - provides fail-safe recovery window for firmware hang detection |
| Power-Fail Threshold | 1.25V internal reference - enables adjustable undervoltage warning via external resistor divider |
| Supply Current | 100µA max at VCC = 3.3V - supports long battery life in portable equipment |
| Operating Temp Range | 0°C to +70°C - qualified for commercial-grade embedded instrumentation |
| Package | 8-pin SO (S8-2) - surface-mount compatible with standard reflow profiles |
Pinout & Package
MAX706TCSA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, designated S8-2 per Maxim's ordering information, with gull-wing leads and standard 1.27mm pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR (Manual Reset) | Active-low TTL/CMOS-compatible input; internally pulled up with 70µA current; triggers 200ms reset pulse when pulled below 0.6V |
| 2 | VCC | Positive supply input (3.15V to 5.5V); powers all internal circuits including reset generator and watchdog |
| 3 | GND | Ground reference for all analog and digital functions; must be low-impedance connection |
| 4 | PFI | Power-Fail Input - connects to resistive divider; comparator trips when voltage falls below 1.25V |
| 5 | PFO | Active-low Power-Fail Output - sinks current when PFI < 1.25V; used for early-warning interrupt or cascaded reset |
| 6 | WDI | Watchdog Input - requires rising/falling edge within 1.6s to prevent WDO assertion; high-impedance tolerant |
| 7 | WDO | Active-low Watchdog Output - asserts on timeout or VCC dropout; not directly connected to RESET |
| 8 | RESET | Active-low Reset Output - held low for ≥200ms after VCC exceeds 3.08V or MR release; guaranteed valid to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing µP runaway before full power collapse |
| Debounced MR input with 500ns min pulse width | Eliminates need for external RC debounce; supports direct pushbutton or logic-level triggering |
| 1.25V precision PFI reference with 10mV hysteresis | Enables stable power-fail detection without oscillation near trip point, even with noisy supplies |
| WDI disable on high-impedance state | Allows safe watchdog deactivation when µP enters low-power mode with tri-stated I/O |
| 200ms factory-trimmed reset delay | Removes external timing components and eliminates variation due to capacitor tolerance/aging |
Applications
| Portable Medical Instrumentation | Industrial PLC I/O Module |
|---|---|
Use Scenario: Handheld blood glucose meter powered by single 3.3V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Supervises main supply rail and triggers controlled shutdown when battery drops below 3.08V; PFI monitors unregulated DC input for early AC loss detection. Use Value: Prevents data corruption during transition between battery and adapter power using synchronized RESET and PFO-driven interrupt. |
Use Scenario: DIN-rail mounted remote I/O module operating in factory environment with 24VDC input and isolated 3.3V logic rail. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply for brownout; WDO connected to µP NMI to log fault events before reset; MR tied to front-panel service button. Use Value: Enables field-serviceable reset and persistent fault logging without requiring host controller intervention. |
| Network Edge Router Control Card | Automotive Infotainment Head Unit |
Use Scenario: Carrier-grade router control board with dual 3.3V/5V supplies and FPGA-based management subsystem. IC Role / Device Role / Timing Role: Generates power-on reset for ARM processor and CPLD; PFO feeds FPGA interrupt to initiate configuration validation upon power-fail warning. Use Value: Reduces boot-time errors by validating FPGA bitstream integrity before releasing processor from reset. |
Use Scenario: Automotive head unit with 12V battery input, buck-boost converter, and 3.3V MCU rail subject to load-dump transients. IC Role / Device Role / Timing Role: Provides robust reset under cold-crank (low-VCC) and hot-swap conditions; RESET output drives external PMIC enable with 200ms hold time. Use Value: Ensures MCU remains held in reset until post-transient stabilization, avoiding spurious execution during unstable supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+ | Lower 2.63V reset threshold; identical pinout, timing, and feature set | Suitable for +2.7V–3.0V systems where 3.08V threshold would cause premature reset assertion | Select when monitoring lower-voltage rails; no PCB changes required |
| TPS3808G33DBVR | 3.3V reset threshold (±0.5%), 350ms reset delay, 2.5µA quiescent current, no watchdog function | Lacks WDI/WDO; optimized for ultra-low-power battery operation rather than watchdog-reliant systems | Choose when watchdog is unnecessary and sub-10µA supply current is critical |
Compared with MAX706RCSA+, the MAX706TCSA+T offers higher reset threshold for tighter regulation of +3.3V rails; compared with TPS3808G33DBVR, it retains watchdog capability essential for safety-critical firmware supervision but consumes more current.
Availability
MAX706TCSA+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial controllers, and network infrastructure equipment requiring stable component supply across commercial temperature range and SO-8 footprint compatibility.
Supply support for MAX706TCSA+T 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, automotive, and communications markets.
The MAX706 family delivers cost-optimized, pin-compatible supervisory solutions targeting +3V/+3.3V microprocessor systems needing reliable reset, watchdog, and power-fail monitoring without external components.
FAQ
What is the exact reset threshold voltage for MAX706TCSA+T?
The MAX706TCSA+T has a factory-trimmed reset threshold of 3.08V, with ±1.5% tolerance over the full 0°C to +70°C operating range. This value is specified for VCC falling conditions and ensures reliable assertion of the active-low RESET signal when the monitored +3.3V supply drops below nominal regulation. The threshold is fixed and non-adjustable.
Does MAX706TCSA+T include a watchdog timer function?
Yes, MAX706TCSA+T includes a watchdog timer with a nominal timeout period of 1.6 seconds. It monitors the WDI pin for transitions and asserts the active-low WDO output if no edge occurs within that window. The watchdog cannot be disabled - unlike the MAX706AT variant - making it suitable for applications requiring always-on supervision.
What package type and footprint does MAX706TCSA+T use?
MAX706TCSA+T is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, identified by Maxim as S8-2. It features gull-wing leads, 1.27mm lead pitch, and standard JEDEC MS-012AC dimensions - fully compatible with automated SMT assembly and reflow soldering processes.
Can MAX706TCSA+T monitor a power supply other than VCC?
Yes, MAX706TCSA+T can monitor secondary supplies via its PFI (Power-Fail Input) pin. By connecting PFI to a resistive divider from an unregulated or auxiliary rail, the internal 1.25V comparator detects when that rail falls below the trip point, asserting the active-low PFO output - enabling early-warning power-fail detection independent of VCC.
Is the RESET output of MAX706TCSA+T guaranteed to function below 3.3V supply?
Yes, MAX706TCSA+T guarantees RESET assertion down to VCC = 1V, ensuring robust reset behavior during severe brownout or slow power-down. The output remains valid and actively driven low until VCC drops below 1V, after which it transitions to high-impedance - a key reliability feature for systems with variable input conditions.
MAX706TCSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX706TCSA+T FAQ
1.How can I place an order for MAX706TCSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TCSA+T 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 MAX706TCSA+T reliable?
The price and inventory of MAX706TCSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TCSA+T is usually 5 days.
3.What payment methods are accepted for MAX706TCSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TCSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TCSA+T?
MAX706TCSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TCSA+T 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 MAX706TCSA+T?
For technical support, including MAX706TCSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TCSA+T requirements.
6.How does Aetrix verify that MAX706TCSA+T is sourced from the original manufacturer or authorized distributors?
All MAX706TCSA+T 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 MAX706TCSA+T meets industry standards.
7.What is the process for return or replacement of MAX706TCSA+T?
All MAX706TCSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TCSA+T, 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 MAX706TCSA+T part is unused and in its original packaging.
Return procedure for MAX706TCSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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