My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX706TCUA
- Part No.:
- MAX706TCUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX706TCUA.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:7,130
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX706TCUA from Maxim Integrated is an active-low microprocessor supervisory circuit in 8-pin µMAX package, providing reset generation (3.08V threshold), watchdog timer (1.6s timeout), power-fail detection (1.25V comparator), and manual-reset input for +3V/+3.3V systems. It ensures reliable µP startup and brownout recovery in battery-powered instrumentation.
For engineers reviewing the MAX706TCUA datasheet, MAX706TCUA pinout, MAX706TCUA application, or MAX706TCUA equivalent, key selection factors include its guaranteed RESET assertion down to VCC = 1V, 200ms reset pulse width, 100µA quiescent current, and compatibility with TTL/CMOS manual-reset interfaces in space-constrained designs.
Technical Context
The MAX706TCUA implements a precision voltage monitor with 3.08V ±1.5% reset threshold and 20mV hysteresis, coupled to a monostable reset generator producing a fixed 200ms active-low reset pulse after VCC rise or MR assertion. Its watchdog circuit resets on missing WDI transitions within 1.6s and asserts WDO low - independent of reset state but disabled during reset assertion.
It integrates a 1.25V reference-based power-fail comparator (PFI/PFO) with <25nA input bias, enabling external resistive-divider monitoring of auxiliary supplies. The MR input features internal 70µA pullup and supports debounced pushbutton or logic-level triggering with 500ns minimum pulse width at 3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - precisely monitors +3.3V supply dropout with guaranteed assertion down to VCC = 1V |
| Reset Pulse Width | 200ms typical - provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±40% - detects µP lockup without requiring software servicing overhead |
| Quiescent Current | 100µA max - enables long battery life in portable equipment |
| Supply Range | 1.2V to 5.5V - operates across full industrial voltage range including degraded battery conditions |
| PFI Threshold | 1.25V ±40mV - supports accurate power-fail warning or low-battery detection via external divider |
| MR Input Compatibility | TTL/CMOS - directly interfaces with µP GPIO or pushbutton without level-shifting |
Pinout & Package
MAX706TCUA is housed in an 8-pin µMAX package (U8-1), measuring 3mm × 3mm × 0.8mm, with exposed pad for thermal enhancement and lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | Internally pulled up with 70µA; triggers 200ms reset pulse when pulled below 0.6V |
| 2 (VCC) | Positive supply input | Accepts 1.2V–5.5V; powers all internal functions including reset generator and comparator |
| 3 (GND) | Ground reference | Common return path for reset, watchdog, and power-fail outputs |
| 4 (PFI) | Power-fail comparator inverting input | Connected to internal 1.25V reference; monitors external supply via resistive divider |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; used for early-warning interrupt or cascaded reset initiation |
| 6 (WDI) | Watchdog input | Edge-sensitive; resets 1.6s timer on rising/falling transition; disables when open or high-Z |
| 7 (RESET) | Active-low reset output | Asserted low during power-up, brownout, or MR activation; holds for 200ms after recovery |
| 8 (WDO) | Active-low watchdog output | Asserted low if WDI idle >1.6s; also asserts on VCC dropout but releases immediately on recovery |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior even during deep brownout or battery sag |
| Debounced manual reset input | Eliminates need for external RC debounce circuitry; 140ms minimum pulse width tolerance |
| WDI disable on high-impedance state | Prevents false watchdog timeouts when µP enters sleep mode with tri-stated WDI |
| 1.25V precision PFI reference | Enables accurate low-battery detection or unregulated supply monitoring with minimal external components |
| 8-pin µMAX surface-mount package | Reduces PCB footprint by >50% vs. SO-8 while maintaining same pinout and thermal performance |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers with Brownout Resilience |
|---|---|
Use Scenario: Handheld multimeter operating from single 3.3V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET during battery voltage sag below 3.08V and generating power-fail interrupt via PFO before regulator dropout. Use Value: Prevents corrupted measurements and flash writes during low-voltage operation; extends usable battery range by 12% via precise 3.08V threshold. |
Use Scenario: PLC I/O module powered from 3.3V rail derived from noisy 24V DC bus. IC Role / Device Role / Timing Role: Active-low RESET generator and watchdog supervisor ensuring µP recovery from EMI-induced lockups and supply transients. Use Value: Eliminates field failures caused by undetected µP hangs; 200ms reset pulse exceeds ARM Cortex-M boot requirement by 2×. |
| Embedded Computing in Space-Constrained Devices | Critical µP Power Monitoring in Medical Sensors |
Use Scenario: Wearable health monitor with 3.3V SoC and tight 12mm² PCB area budget. IC Role / Device Role / Timing Role: Compact µMAX-packaged supervisor providing reset, watchdog, and PFI monitoring in single IC. Use Value: Replaces three discrete components (reset IC, watchdog, comparator), saving 8.5mm² board area and reducing BOM count. |
Use Scenario: Implantable glucose sensor requiring fail-safe power sequencing and battery depletion warning. IC Role / Device Role / Timing Role: Dual-role supervisor generating RESET on main supply fault and PFO-triggered shutdown on battery voltage decay. Use Value: Meets ISO 13485 power integrity requirements; 1.25V PFI threshold enables accurate end-of-life detection with ±2% battery voltage error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SCUA | 2.93V reset threshold (vs. 3.08V); identical pinout, timing, and feature set | Suitable for systems with tighter 3.3V supply tolerance where earlier reset assertion is required | Select when monitoring 3.3V rails with ±3% regulation; no layout change needed |
| MAX706RCUA | 2.63V reset threshold; otherwise functionally identical in µMAX package | Preferred for legacy 3.3V designs with higher dropout margins or dual-voltage (3.3V/5V) systems | Choose for backward compatibility with existing MAX706R-based designs; same footprint and drive strength |
Compared with MAX706SCUA and MAX706RCUA, the MAX706TCUA offers the highest reset threshold in the family, making it optimal for modern low-dropout 3.3V regulators where late reset assertion prevents unnecessary reboots during transient dips.
Availability
MAX706TCUA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controllers, embedded computing, and medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX706TCUA 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, automotive, and communications applications.
The MAX706 family was designed specifically for cost-sensitive, space-constrained microprocessor systems requiring integrated reset, watchdog, and power-fail monitoring in a single 8-pin package.
FAQ
What is the reset threshold voltage of the MAX706TCUA?
The MAX706TCUA has a nominal reset threshold voltage of 3.08V with ±1.5% tolerance over temperature. This value is factory-trimmed and specified for VCC falling conditions. It guarantees active-low RESET assertion when the supply drops below this threshold and remains asserted until VCC rises 20mV above it, providing noise immunity against supply ripple.
Does the MAX706TCUA include a watchdog timer function?
Yes, the MAX706TCUA includes a watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on any edge (rising or falling) at the WDI pin. If no transition occurs within 1.6s, WDO goes low. The watchdog function disables automatically when WDI is left open or driven high-impedance, preventing spurious timeouts during µP sleep modes.
Can the MAX706TCUA monitor a secondary power supply like a battery?
Yes, the MAX706TCUA can monitor auxiliary supplies using its PFI input and internal 1.25V reference. By connecting PFI to a resistive divider from the battery rail, the device asserts PFO low when battery voltage falls below the programmed threshold - enabling early low-battery warnings or controlled shutdown sequences without additional comparators.
What package type is used for the MAX706TCUA?
The MAX706TCUA is supplied in an 8-pin µMAX package (U8-1), a miniature surface-mount package measuring 3mm × 3mm × 0.8mm with exposed thermal pad. It is pin-compatible with SO-8 and PDIP-8 variants of the MAX706 family and supports lead-free assembly processes.
Is the MAX706TCUA compatible with both 3.3V and 5V microprocessor systems?
Yes, the MAX706TCUA operates from 1.2V to 5.5V and is fully specified for use with both 3.3V and 5V µP systems. Its reset threshold (3.08V) is optimized for 3.3V rails, but it maintains valid logic levels, timing, and drive strength across the full supply range - including degraded 3V battery operation.
MAX706TCUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- 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-µMAX
MAX706TCUA FAQ
1.How can I place an order for MAX706TCUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706TCUA 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 MAX706TCUA reliable?
The price and inventory of MAX706TCUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706TCUA is usually 5 days.
3.What payment methods are accepted for MAX706TCUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706TCUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706TCUA?
MAX706TCUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706TCUA 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 MAX706TCUA?
For technical support, including MAX706TCUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706TCUA requirements.
6.How does Aetrix verify that MAX706TCUA is sourced from the original manufacturer or authorized distributors?
All MAX706TCUA 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 MAX706TCUA meets industry standards.
7.What is the process for return or replacement of MAX706TCUA?
All MAX706TCUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX706TCUA, 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 MAX706TCUA part is unused and in its original packaging.
Return procedure for MAX706TCUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX706TCUA 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…
