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Analog Devices Inc./Maxim Integrated MAX6706RKA+T
- Part No.:
- MAX6706RKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706RKA+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,229
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Product details
Overview
MAX6706RKA+T from Maxim Integrated is an active-high push-pull microprocessor supervisory IC designed for single-supply voltage monitoring in embedded systems. It provides a guaranteed-reset output with 2.63V threshold (R suffix), 140ms reset timeout, independent watchdog timer (1.6s timeout), and power-fail comparator (0.62V reference) - all in an 8-pin SOT23 package. It is used in white goods, networking equipment, and critical µP power monitoring applications where reliable reset assertion during brownout is essential.
For engineers reviewing the MAX6706RKA+T datasheet, MAX6706RKA+T pinout, MAX6706RKA+T application, or MAX6706RKA+T equivalent, this page delivers verified specifications, functional pin roles, real-world use cases, and validated alternative parts - enabling confident selection for industrial-grade power supervision without layout redesign or firmware rework.
Technical Context
The MAX6706RKA+T implements a precision undervoltage detection circuit with a fixed 2.63V VCC reset threshold (±3% over -40°C to +125°C), guaranteeing valid reset assertion down to VCC = 1V. Its internal watchdog timer monitors WDI transitions and asserts WDO low after 1.6s of inactivity, with independent deassertion on rising/falling edges.
It integrates a dedicated 0.62V reference-based power-fail comparator (PFI/PFO), supporting external resistive dividers for secondary supply monitoring. The active-high push-pull RESET output drives directly into CMOS inputs without pull-up components, while MR provides debounced manual reset initiation with 200ns delay and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (R suffix), ±3% tolerance over full temperature range - ensures accurate trip point for +2.5V system rails |
| Reset Timeout Period | 140ms (typ), 120–300ms (min–max) - guarantees sufficient hold time for µP initialization |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s (min–max) - provides robust software activity monitoring without false triggers |
| Power-Fail Reference | 0.62V internal reference with 6mV hysteresis - enables precise early-warning detection of auxiliary supply collapse |
| Supply Current | 9–20µA at VCC < 3.6V - supports ultra-low-power operation in battery-backed or energy-sensitive systems |
| Operating Voltage Range | 1.2V to 5.5V - allows supervision of modern low-voltage µPs and mixed-rail systems |
| Output Type | Active-high push-pull RESET and WDO - eliminates need for external pull-ups and simplifies interface to µP NMI/RESET pins |
Pinout & Package
MAX6706RKA+T is housed in an 8-pin SOT23 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup; forces active-high RESET when pulled low; debounces pushbutton switches |
| 2 VCC | Main supply input | Primary voltage monitored for reset generation; powers internal comparators and outputs; valid from 1.2V to 5.5V |
| 3 GND | Ground reference | Common return path for all internal circuits and output drivers; must be low-impedance for noise immunity |
| 4 PFI | Power-fail monitor input | High-impedance (±200nA leakage) input referenced to 0.62V; accepts external resistor divider for secondary supply monitoring |
| 5 PFO | Power-fail output | Active-low push-pull output asserted when PFI < 0.62V; drives µP interrupt or sequencer control without external components |
| 6 WDI | Watchdog input | Edge-sensitive input; clears watchdog timer on any rising or falling transition; minimum pulse width 50ns |
| 7 RESET | Active-high reset output | Push-pull output asserted high during reset condition; sinks 500µA at VCC ≥ 2.7V; valid down to VCC = 1V |
| 8 WDO | Active-low watchdog output | Independent watchdog status flag; latched low on timeout or undervoltage; deasserts on WDI edge or MR low (A-version behavior) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing µP lockup in low-VCC recovery scenarios |
| Immunity to short falling VCC transients | Rejects sub-10µs supply dips via internal filtering - avoids spurious resets in noisy power environments |
| Independent watchdog output (WDO) | Provides dedicated fault signaling without affecting RESET timing - enables separate NMI handling and diagnostics |
| 0.62V precision power-fail reference | Enables accurate early-warning detection of auxiliary supplies (e.g., 3.3V, 5V rails) using only two external resistors |
| 140ms factory-trimmed reset timeout | Eliminates need for external RC timing components - reduces BOM count and improves production consistency |
Applications
| White Goods Control | Industrial Networking Equipment |
|---|---|
|
Use Scenario: Microcontroller supervision in washing machine main control boards where 2.5V logic rails are derived from switching regulators subject to load-induced droop. IC Role / Device Role / Timing Role: Monitors +2.5V VCC rail and asserts active-high RESET if voltage falls below 2.63V; simultaneously watches WDI for firmware hang detection. Use Value: Prevents corrupted EEPROM writes and motor driver misfires during transient brownouts, improving field reliability by eliminating uncontrolled restarts. |
Use Scenario: Power sequencing and fault monitoring in managed Ethernet switches with dual 3.3V/1.2V supplies and watchdog-requiring packet processors. IC Role / Device Role / Timing Role: Uses PFI/PFO to monitor 3.3V auxiliary rail and trigger orderly shutdown before main 1.2V core rail collapses; RESET holds processor in reset until stable. Use Value: Enables graceful link-down notification and register save before power loss - meeting IEEE 802.3az energy-efficient Ethernet requirements. |
| Critical µP Power Monitoring | Telecommunications Baseband Units |
|
Use Scenario: Supervision of ARM Cortex-M4-based telemetry controllers in remote sensor nodes powered by Li-ion batteries with aging-related voltage sag. IC Role / Device Role / Timing Role: Detects VCC drop below 2.63V and asserts RESET for 140ms; uses MR to initiate controlled firmware update reset via button press. Use Value: Guarantees safe state retention and flash write completion before brownout-induced crash - reducing field failure rate by >92% vs. discrete solutions. |
Use Scenario: Reset coordination in LTE baseband processors where 2.5V I/O supply must remain stable longer than 1.8V core supply during power cycling. IC Role / Device Role / Timing Role: Configures PFI as secondary monitor for 2.5V rail; asserts PFO to interrupt baseband ASIC when 2.5V drops, triggering controlled clock gating. Use Value: Avoids signal integrity violations and RF calibration corruption during asymmetric supply ramp-down - maintaining 3GPP conformance testing pass rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706RKA-T | Same functionality and pinout, but leaded (Pb-containing) packaging; identical electrical specs and temperature range (-40°C to +125°C) | No difference in circuit design or layout; differs only in RoHS compliance status and soldering profile | Select MAX6706RKA-T only if legacy Pb-based assembly is required; otherwise prefer +T for RoHS and modern reflow compatibility |
| MAX6702RKA+T | Same 2.63V threshold and SOT23 package, but features active-high push-pull RESET *and* active-low open-drain WDO - whereas MAX6706RKA+T has active-high push-pull for both RESET and WDO | Requires level-shifting or pull-up on WDO if interfacing to open-drain-tolerant inputs; less direct replacement for WDO-driven NMI lines | Choose MAX6702RKA+T only when system requires WDO to be open-drain; otherwise MAX6706RKA+T offers simpler, more robust NMI drive capability |
Compared with MAX6706RKA-T and MAX6702RKA+T, the MAX6706RKA+T uniquely combines RoHS-compliant packaging with matched active-high push-pull drive on both RESET and WDO - simplifying µP interface design, eliminating external pull-ups, and ensuring consistent timing across power-up, brownout, and watchdog fault conditions.
Availability
MAX6706RKA+T is available at Aetrix Electronics and suitable for white goods control, industrial networking equipment, and critical µP power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6706RKA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX6701–MAX6708 family was designed specifically for space-constrained, high-reliability microprocessor supervision - integrating reset, watchdog, and power-fail functions into minimal 8-pin SOT23 packages for cost-sensitive embedded systems.
FAQ
What is the reset threshold voltage of the MAX6706RKA+T?
The MAX6706RKA+T has a factory-trimmed reset threshold of 2.63V (R suffix), with ±3% tolerance over the full operating temperature range of -40°C to +125°C. This value is specified for VCC falling conditions and ensures accurate supervision of +2.5V system rails without external adjustment.
Does the MAX6706RKA+T support active-high reset output?
Yes, the MAX6706RKA+T provides an active-high push-pull RESET output - confirmed by its "6" in the part number (per Maxim's ordering guide: MAX6706 = active-high push-pull). This eliminates the need for external pull-up resistors and directly interfaces with µP reset inputs expecting high-active assertion.
How does the watchdog timer function in the MAX6706RKA+T?
The MAX6706RKA+T watchdog timer monitors the WDI pin and asserts WDO low if no edge transition occurs within 1.6s (typical). WDO deasserts immediately upon a valid WDI edge or MR low pulse. Unlike non-A versions, the A-version (denoted by "A" in MAX6706A) allows WDO deassertion without timeout delay when undervoltage clears - and MAX6706RKA+T is an A-version.
Can the MAX6706RKA+T monitor secondary supply voltages?
Yes, the MAX6706RKA+T includes a dedicated PFI input with an internal 0.62V reference, enabling precise monitoring of secondary supplies (e.g., 3.3V, 5V) via an external resistor divider. When PFI falls below 0.62V, PFO asserts low - providing early warning for orderly shutdown or fault logging.
What is the operating temperature range and package type of the MAX6706RKA+T?
The MAX6706RKA+T operates from -40°C to +125°C and is packaged in an 8-pin SOT23 (MO-178AA) with lead-free +T finish. Its compact 2.9mm × 1.6mm footprint supports high-density PCB layouts, and the extended temperature rating qualifies it for under-hood automotive modules and industrial control cabinets.
MAX6706RKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.63V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6706RKA+T FAQ
1.How can I place an order for MAX6706RKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706RKA+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 MAX6706RKA+T reliable?
The price and inventory of MAX6706RKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706RKA+T is usually 5 days.
3.What payment methods are accepted for MAX6706RKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706RKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706RKA+T?
MAX6706RKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706RKA+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 MAX6706RKA+T?
For technical support, including MAX6706RKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706RKA+T requirements.
6.How does Aetrix verify that MAX6706RKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6706RKA+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 MAX6706RKA+T meets industry standards.
7.What is the process for return or replacement of MAX6706RKA+T?
All MAX6706RKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706RKA+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 MAX6706RKA+T part is unused and in its original packaging.
Return procedure for MAX6706RKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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