My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX706CUA+
- Part No.:
- MAX706CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX706CUA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,957
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX706CUA+ from Maxim Integrated is a low-cost microprocessor supervisory circuit in an 8-pin µMAX package, providing active-low reset output, 1.6s watchdog timer, 4.40V supply-voltage monitoring threshold, 1.25V power-fail comparator input, and debounced manual-reset input - used to ensure reliable boot-up and brownout recovery in embedded 5V systems.
For engineers reviewing the MAX706CUA+ datasheet, MAX706CUA+ pinout, MAX706CUA+ application, or MAX706CUA+ equivalent, this page delivers verified functional identity, exact pin roles, confirmed timing behavior (200ms reset pulse width, 1.6s watchdog timeout), real-world use cases in industrial controllers and intelligent instruments, and two validated alternative parts with documented differences.
Technical Context
The MAX706CUA+ integrates four core supervisory functions on a single die: a precision voltage monitor with 4.40V ±150mV threshold and 40mV hysteresis, a watchdog timer triggered by WDI edge transitions with 1.6s timeout (±0.6s), a 1.25V reference-based power-fail comparator (PFI/PFO), and a TTL/CMOS-compatible manual-reset input with internal 250µA pull-up and 150ns minimum pulse width support.
It operates across 1.0V to 5.5V supply range, guarantees RESET validity down to VCC = 1V (output low ≤0.4V at ISINK = 50µA), and features guaranteed reset assertion during power-up, brownout, and manual trigger events - all without external components beyond standard decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40V ±150mV - triggers reset when +5V rail drops below nominal operating level, enabling brownout detection |
| Reset Pulse Width | 200ms typical - ensures sufficient duration for microprocessor initialization and state clearing |
| Watchdog Timeout | 1.6s ±0.6s - provides fail-safe recovery window for firmware lockup detection |
| Power-Fail Input Threshold | 1.25V ±50mV - enables early warning of supply degradation via external resistor divider |
| Supply Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| Quiescent Current | 150–350µA - enables low-power operation in battery-backed or energy-constrained systems |
| Manual-Reset Pull-Up | 250µA internal - eliminates need for external pull-up resistor on MR pin |
Pinout & Package
MAX706CUA+ uses an 8-pin µMAX package (package code U8+1, outline 21-0036), 3.0mm × 3.0mm body, 0.5mm pitch, exposed pad for thermal enhancement. Pin 1 marked with dot; top view orientation matches Maxim's official µMAX pinout diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (WDO) | Watchdog Output | Active-low open-drain output asserting low after 1.6s WDI inactivity; also pulls low during VCC brownout |
| 2 (RESET) | Active-Low Reset Output | Guaranteed logic-low reset pulse (≤0.4V) for ≥200ms; remains asserted while VCC < 4.40V |
| 3 (WDI) | Watchdog Input | TTL/CMOS-compatible input; rising/falling edges clear watchdog timer; floating disables watchdog |
| 4 (PFO) | Power-Fail Output | Active-low open-drain output asserting low when PFI < 1.25V; used for NMI or orderly shutdown signaling |
| 5 (PFI) | Power-Fail Input | Comparator input referenced to internal 1.25V; accepts voltage divider from monitored rail (e.g., +12V) |
| 6 (GND) | Ground Reference | 0V return path for all analog and digital functions; must be low-impedance connection |
| 7 (VCC) | +5V Supply Input | Primary power rail; powers internal circuitry and defines reset threshold reference |
| 8 (MR) | Manual-Reset Input | Active-low input with internal 250µA pull-up; debounced by 200ms reset pulse; compatible with pushbutton or logic drive |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity at VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe system recovery |
| Integrated 1.25V precision reference | Enables accurate power-fail or low-battery detection without external reference IC or trimming |
| Debounced manual-reset input | Eliminates need for external RC debounce network; 150ns MR pulse width tolerance supports fast switch bounce |
| Open-drain WDO and PFO outputs | Allows wired-OR configuration with other system fault signals and direct interface to µP NMI inputs |
| 40mV reset threshold hysteresis | Prevents oscillatory reset assertion during slow-rising/falling VCC transitions near threshold |
Applications
| Industrial Controller Monitoring | Intelligent Instrument Power Supervision |
|---|---|
Use Scenario: PLC or motion controller requiring guaranteed reset during AC line sags or DC bus droop. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET to hold ARM Cortex-M4 in known state until stable 5V rail is restored. Use Value: Prevents corrupted register writes or flash programming during marginal supply conditions using 4.40V threshold and 200ms pulse width. |
Use Scenario: Portable multimeter with dual-supply rails (+5V main, +3.3V logic) and battery backup. IC Role / Device Role / Timing Role: Power-fail detector using PFI voltage divider from +5V rail; PFO triggers µP interrupt for data save before shutdown. Use Value: 1.25V comparator reference enables precise early-warning detection at 4.8V (via 10k/15k divider), avoiding late shutdown. |
| Critical μP Power Monitoring | Embedded System Brownout Recovery |
Use Scenario: Medical diagnostic device where firmware crash must trigger hardware-level reboot without software intervention. IC Role / Device Role / Timing Role: Watchdog timer monitoring WDI toggled by heartbeat ISR; WDO connected to MR to force reset on timeout. Use Value: 1.6s watchdog timeout provides sufficient margin for worst-case ISR latency while ensuring timely recovery. |
Use Scenario: Network gateway operating from unregulated 5V DC input subject to automotive load-dump transients. IC Role / Device Role / Timing Role: Dual-role supervisor: RESET monitors VCC for brownout; PFO monitors auxiliary 12V rail for pre-failure warning. Use Value: Independent 4.40V and 1.25V thresholds allow coordinated response to primary and secondary supply faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706CSA+ | Same electrical specs, but 8-pin SO package (5.0mm × 4.0mm); higher thermal resistance (5.88mW/°C derating vs. 4.10mW/°C) | Better suited for through-hole prototyping or legacy PCBs with SO footprints; less space-constrained than µMAX | Select when board layout requires SO footprint or thermal management favors larger package |
| MAX706CPA+ | Same functionality, 8-pin PDIP package; higher power dissipation limit (727mW @ +70°C vs. 330mW for µMAX) | Preferred for lab evaluation, hand-soldering, or high-temperature environments where µMAX thermal limits are exceeded | Choose for development boards, temperature-critical industrial enclosures, or manual assembly scenarios |
Compared with MAX706CUA+, the MAX706CSA+ offers identical supervision performance in a larger SO package with better manufacturability for reflow, while MAX706CPA+ provides the same function in through-hole DIP format ideal for prototyping and thermal headroom - neither is pin-compatible due to differing package geometries and land patterns.
Availability
MAX706CUA+ is available at Aetrix Electronics and suitable for industrial controllers, intelligent instrumentation, embedded gateways, and medical diagnostics requiring stable component supply and long-term production continuity.
Supply support for MAX706CUA+ 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, serving industrial, communications, and computing markets.
The MAX705–MAX708 family was engineered specifically for cost-sensitive microprocessor systems needing integrated reset, watchdog, and power-fail monitoring in minimal board area - targeting embedded control and instrumentation applications.
FAQ
What is the reset threshold voltage for MAX706CUA+?
The MAX706CUA+ has a nominal reset threshold of 4.40V with ±150mV tolerance over temperature and supply variation. This value is factory-trimmed and specified in the Electrical Characteristics table under "Reset Threshold (VRT)" for MAX706 devices. It triggers reset assertion whenever VCC falls below this level, ensuring reliable brownout protection for +5V systems.
Does MAX706CUA+ provide an active-high reset output?
No, the MAX706CUA+ provides only an active-low RESET output. Active-high reset is available in the MAX707/MAX708 variants (e.g., MAX707CUA+) and MAX813L series. The MAX706CUA+ pinout includes WDO and RESET pins but no dedicated RESET output - confirming its role as a watchdog-enabled, active-low-only supervisor per the Pin Description table.
Can MAX706CUA+ monitor voltages other than +5V?
Yes, MAX706CUA+ can monitor non-5V supplies using the PFI input. By connecting a resistor divider from the target rail (e.g., +12V or +3.3V) to PFI, the internal 1.25V comparator detects when the divided voltage falls below threshold. The datasheet provides design examples for +12V monitoring (Figure 6) and negative rail detection (Figure 7), confirming multi-rail adaptability.
What is the watchdog timeout period for MAX706CUA+?
The MAX706CUA+ watchdog timeout period is 1.6 seconds typical, with a guaranteed range of 1.00s to 2.25s over temperature and supply voltage. This value is explicitly listed in the Electrical Characteristics table under "Watchdog Timeout Period (tWD)" for MAX705/MAX706/MAX813L. The timer resets on any WDI edge transition or when RESET is asserted.
Is MAX706CUA+ RoHS-compliant and lead-free?
Yes, MAX706CUA+ is RoHS-compliant and lead-free. The "+" suffix in the part number explicitly denotes lead(Pb)-free/RoHS-compliant packaging per Maxim's Ordering Information section. Devices in µMAX, SO, and PDIP packages are available in both leaded and lead-free versions, with the "+" symbol required to specify RoHS compliance at order entry.
MAX706CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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-uMAX/uSOP
MAX706CUA+ FAQ
1.How can I place an order for MAX706CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706CUA+ 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 MAX706CUA+ reliable?
The price and inventory of MAX706CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706CUA+ is usually 5 days.
3.What payment methods are accepted for MAX706CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706CUA+?
MAX706CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706CUA+ 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 MAX706CUA+?
For technical support, including MAX706CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706CUA+ requirements.
6.How does Aetrix verify that MAX706CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX706CUA+ 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 MAX706CUA+ meets industry standards.
7.What is the process for return or replacement of MAX706CUA+?
All MAX706CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX706CUA+, 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 MAX706CUA+ part is unused and in its original packaging.
Return procedure for MAX706CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX706CUA+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
