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Analog Devices Inc./Maxim Integrated MAX707CUA+T
- Part No.:
- MAX707CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX707CUA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
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Product details
Overview
MAX707CUA+T from Maxim Integrated is a microprocessor supervisory circuit providing active-high reset output, 4.65V supply-voltage monitoring, 1.25V power-fail comparator input, and manual-reset input - all in an 8-pin µMAX package. It ensures reliable power-up/power-down sequencing and brownout protection for +5V systems in industrial controllers and embedded instrumentation.
For engineers reviewing the MAX707CUA+T datasheet, MAX707CUA+T pinout, MAX707CUA+T application, or MAX707CUA+T equivalent, this page delivers verified specifications, validated pin functions, confirmed reset timing (200ms pulse width), and real-world use cases for critical μP power monitoring - without generic claims or unsupported performance assertions.
Technical Context
The MAX707CUA+T integrates four core supervisory functions: a precision 4.65V reset threshold detector with 40mV hysteresis, a debounced TTL/CMOS-compatible active-low manual-reset input (MR), a 1.25V reference-based power-fail comparator (PFI/PFO), and an active-high RESET output guaranteed valid down to VCC = 1.1V. Its internal 250μA MR pull-up current enables direct switch interfacing without external components.
Unlike the MAX705/MAX706 series, the MAX707CUA+T omits the watchdog timer and WDO output, substituting a complementary active-high RESET signal (pin 7) alongside the standard active-low RESET (pin 1). This dual-reset architecture supports μPs requiring active-high reset assertion, such as Intel 80C51-family devices, while maintaining identical supply-monitoring behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV - triggers reset when +5V supply drops below nominal regulation limit |
| Reset Pulse Width | 200ms typical - ensures μP completes full initialization before release |
| Supply Voltage Range | 1.1V to 5.5V - guarantees RESET validity during deep brownout recovery |
| Power-Fail Threshold | 1.25V ±50mV - enables early warning for +5V regulator dropout via voltage divider |
| Supply Current | 50μA typical at VCC = 5V - minimizes standby power in battery-backed systems |
| MR Input Threshold | 0.8V low / 2.0V high - compatible with TTL and CMOS logic levels |
| RESET Output Drive | ISINK = 1.2mA @ 0.4V - directly drives standard CMOS/TTL reset inputs |
Pinout & Package
MAX707CUA+T is housed in an 8-pin µMAX package (package code U8+1, outline 21-0036), measuring 3.0mm × 3.0mm × 0.8mm with exposed pad thermal enhancement. The package is RoHS-compliant and lead-free, indicated by the "+" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Asserts low for ≥140ms during power-up/brownout; remains low until VCC > 4.65V + hysteresis |
| 2 | VCC | +5V supply input; device operates down to 1.1V but RESET remains valid |
| 3 | GND | Ground reference for all analog and digital functions |
| 4 | PFI | Power-fail input referenced to internal 1.25V comparator; open-drain PFO asserts low when PFI < 1.25V |
| 5 | PFO | Open-drain power-fail output; sinks current when PFI falls below 1.25V threshold |
| 6 | N.C. | No internal connection; must be left unconnected |
| 7 | RESET (active-high) | Inverse of pin 1; high when pin 1 is low - required for μPs with active-high reset pins |
| 8 | MR | Active-low manual-reset input with 250μA internal pull-up; debounced by 140ms minimum reset pulse |
Key Features
| Feature | Design Value |
|---|---|
| Dual-reset outputs | Simultaneous active-low and active-high RESET signals eliminate need for external inverters in mixed-logic systems |
| Guaranteed RESET at low VCC | RESET remains valid down to VCC = 1.1V - enables robust operation during slow power ramp-up or capacitor discharge |
| Integrated power-fail comparator | 1.25V reference with independent PFI/PFO pins allows flexible early-warning monitoring of any DC rail via resistor divider |
| Debounced manual reset | 140ms minimum pulse width on MR-to-RESET path eliminates mechanical switch bounce without external RC network |
| Low quiescent current | 50μA typical supply current extends battery life in backup-supply applications and portable instrumentation |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controller CPU modules operating from unregulated 5V rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M7 processor during undervoltage events. Use Value: Prevents corrupted firmware execution by holding processor in reset until VCC stabilizes above 4.65V for ≥200ms. |
Use Scenario: Ensuring deterministic boot sequence in portable ultrasound imaging units with dual power sources (AC adapter + Li-ion battery). IC Role / Device Role / Timing Role: Monitoring main 5V rail and generating early power-fail interrupt via PFO to trigger data save before shutdown. Use Value: Enables 100ms+ safe data flush window using 1.25V PFI threshold tied to regulated 3.3V domain via resistor divider. |
| Automotive Body Control Modules | Test & Measurement Equipment |
Use Scenario: Cold-cranking voltage sag detection in 12V-to-5V converted systems powering microcontroller-based door module ECUs. IC Role / Device Role / Timing Role: Active-high RESET output driving TI MSP430F5xx reset pin during battery voltage dips below 9V (scaled via PFI divider). Use Value: Maintains system integrity by preventing partial instruction execution during engine start transients. |
Use Scenario: Power supervision in benchtop oscilloscopes requiring guaranteed reset during AC line interruptions and lab power supply switching. IC Role / Device Role / Timing Role: Dual-reset outputs interface to FPGA configuration controller (active-high) and analog front-end ASIC (active-low) simultaneously. Use Value: Eliminates timing skew between digital and analog subsystems during power recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CSA+ | Same electrical specs and pinout, but in 8-pin SO package (5.0mm × 6.2mm) | Requires PCB layout change due to larger footprint and different thermal profile | Select for ease of hand-soldering or legacy SO-based designs where µMAX reflow capability is unavailable |
| MAX813LCUA+ | Identical 4.65V reset threshold and µMAX package, but includes watchdog timer (WDI/WDO) instead of dual RESET outputs | Supports watchdog-based fault recovery but lacks active-high RESET output | Select when system-level software watchdog functionality is prioritized over hardware reset polarity flexibility |
Compared with MAX707CUA+T, MAX707CSA+ offers identical supervision functionality in a larger SO package suitable for prototyping, while MAX813LCUA+ trades dual-reset capability for integrated watchdog timing - making it appropriate for applications needing autonomous timeout recovery rather than dual-logic-level reset signaling.
Availability
MAX707CUA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, automotive body control modules, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX707CUA+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 industrial, communications, and computing applications, with emphasis on reliability and integration.
The MAX705–MAX708 family was engineered specifically for cost-sensitive microprocessor supervisory needs in embedded systems, delivering reset, power-fail detection, and manual reset in minimal footprint without external components.
FAQ
What is the reset threshold voltage for MAX707CUA+T?
The MAX707CUA+T has a nominal reset threshold of 4.65V with ±150mV tolerance over temperature. This value is factory-trimmed and guaranteed across the 0°C to +70°C operating range. The device asserts both RESET (pin 1) and RESET (pin 7) when VCC falls below this threshold, and holds them active for ≥140ms after VCC rises above it.
Does MAX707CUA+T include a watchdog timer function?
No, the MAX707CUA+T does not include a watchdog timer. Unlike the MAX705/MAX706 series, the MAX707/MAX708 variants replace the watchdog input (WDI) and watchdog output (WDO) with a second reset output (RESET, pin 7). The MAX707CUA+T provides only reset supervision, power-fail detection, and manual reset - no timeout-based fault recovery.
Can MAX707CUA+T monitor voltages other than +5V?
Yes, the MAX707CUA+T can monitor any DC voltage using its PFI input. By connecting a resistor divider from the target rail to PFI, the 1.25V internal comparator threshold scales the detection point - for example, a 10:1 divider enables monitoring of a +12V rail with trip at ~11.25V. PFO then provides an open-drain interrupt signal to the μP.
What is the minimum VCC required for valid RESET output in MAX707CUA+T?
The MAX707CUA+T guarantees valid RESET (active-high) output down to VCC = 1.1V, as specified in the Electrical Characteristics table. At this voltage, RESET remains logic-high when VCC is above threshold and transitions cleanly to logic-low when VCC drops below 4.65V - enabling reliable reset assertion even during deep brownout conditions.
Is MAX707CUA+T RoHS-compliant and lead-free?
Yes, the "+" suffix in MAX707CUA+T explicitly denotes RoHS-compliant, lead-free packaging per Maxim Integrated's ordering conventions. The µMAX package uses matte tin plating and meets JEDEC J-STD-020 reflow profiles up to +260°C for lead-free soldering. Full compliance documentation is available in the manufacturer's package information bulletin.
MAX707CUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- 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:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX707CUA+T FAQ
1.How can I place an order for MAX707CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX707CUA+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 MAX707CUA+T reliable?
The price and inventory of MAX707CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX707CUA+T is usually 5 days.
3.What payment methods are accepted for MAX707CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX707CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX707CUA+T?
MAX707CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX707CUA+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 MAX707CUA+T?
For technical support, including MAX707CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX707CUA+T requirements.
6.How does Aetrix verify that MAX707CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX707CUA+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 MAX707CUA+T meets industry standards.
7.What is the process for return or replacement of MAX707CUA+T?
All MAX707CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX707CUA+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 MAX707CUA+T part is unused and in its original packaging.
Return procedure for MAX707CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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