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Analog Devices Inc./Maxim Integrated MAX6887QETE+
- Part No.:
- MAX6887QETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6887QETE+.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,029
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Product details
Overview
The MAX6887QETE+ from Maxim Integrated is a hex-voltage supervisory IC with six adjustable undervoltage/overvoltage detector inputs, active-low open-drain RESET/OV/WDO outputs, 1% threshold accuracy, and dual-mode watchdog timer (102.4s initial / 1.6s normal timeout). It monitors multivoltage power rails in telecom and server systems where precise supply margining and fault recovery are critical.
For engineers reviewing the MAX6887QETE+ datasheet, MAX6887QETE+ pinout, MAX6887QETE+ application, or MAX6887QETE+ equivalent, key selection criteria include its six fully adjustable input thresholds (0.557V UV / 0.643V OV), -40°C to +85°C operation, 16-pin 5mm × 5mm thin QFN package with exposed pad, and integrated margin disable functionality for system-level testing.
Technical Context
The MAX6887QETE+ implements six independent voltage detectors, each with factory-trimmed undervoltage (0.557V) and overvoltage (0.643V) thresholds referenced to a 0.6V internal reference with ±7.5% tolerance. All six inputs are configured as adjustable (Adj) per Selector Guide, enabling user-defined monitoring via external resistor dividers.
Its watchdog logic features two distinct timeout modes: an initial 102.4s period for microprocessor initialization, followed by a normal 1.6s period for runtime supervision. The device derives power from IN1–IN4 or VCC using virtual diode-ORing, with internal BP regulation at 2.55V for logic circuitry and mandatory 1µF ceramic bypassing on both VCC and BP pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Count | 6 voltage-detector inputs (IN1–IN6), all adjustable per Selector Guide |
| UV/OV Thresholds | 0.557V undervoltage / 0.643V overvoltage (factory-set for Adj inputs) |
| Threshold Accuracy | ±1% over -40°C to +85°C - enables precise supply margining without calibration |
| Watchdog Timeout | 102.4s initial / 1.6s normal - supports µP boot sequence and runtime supervision |
| RESET Timeout | 180–220ms - ensures reliable system reset after supply recovery |
| Supply Range | 2.7V to 5.8V on IN1–IN4 or VCC - accommodates common DC-DC output rails |
| Package | 16-pin thin QFN (5mm × 5mm × 0.8mm) with exposed thermal pad (EP = GND) |
Pinout & Package
MAX6887QETE+ uses a 16-pin thin QFN package (5mm × 5mm × 0.8mm) with exposed pad thermally and electrically connected to GND. Pin 1 is RESET; pin 16 is IN1; pin 11 is IN6; pin 8 is I.C. (internal connection, no bond wire); EP must be soldered to PCB GND plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low open-drain reset output | Asserts when any input falls below UV threshold or MR is pulled low; remains low ≥180ms after fault clearance |
| 2 (WDO) | Active-low open-drain watchdog output | Asserts if WDI lacks valid edge within timeout; connects to MR to auto-generate resets on watchdog expiry |
| 3 (OV) | Active-low open-drain overvoltage output | Asserts when any input exceeds OV threshold; deasserts after 25µs once all inputs return to safe range |
| 4 (GND) | Ground reference | Primary return path for all analog/digital circuitry and EP thermal interface |
| 5 (MR) | Manual reset input | Pull low ≥1µs to force RESET assertion; internally pulled up to BP (2.55V) via 10µA current source |
| 6 (MARGIN) | Margin disable control | Pull low to freeze RESET/OV/WDO states during supply stress testing; overrides MR when both asserted |
| 7 (WDI) | Watchdog timer input | Edge-triggered (H→L or L→H); internal 10µA pulldown ensures default timeout if unconnected or floating |
| 9 (VCC) | Internal power-supply voltage | Internally generated from highest of IN1–IN4; bypass with 1µF ceramic capacitor; not for external powering |
| 10 (BP) | Bypass voltage for internal logic | 2.55V regulated output; powers RESET logic; bypass with 1µF ceramic capacitor; not for external loading |
| 11–12 (IN6, IN5) | Adjustable voltage detector inputs | Monitor supplies >0.6V via external resistor divider; require 0.1µF local bypass to GND for noise immunity |
| 13–16 (IN4–IN1) | Adjustable voltage detector inputs | Same function as IN5/IN6; support full 6-input supervision; powered via diode-ORing from IN1–IN4 or VCC |
Key Features
| Feature | Design Value |
|---|---|
| Hex adjustable voltage detection | All six inputs configurable for custom UV/OV thresholds via resistor dividers - eliminates need for multiple discrete supervisors |
| Dual-mode watchdog timer | 102.4s initial timeout allows full µP boot before switching to 1.6s runtime supervision - prevents spurious resets during startup |
| Margin disable function | MARGIN input holds RESET/OV/WDO in current state during supply over/under-stress testing - enables controlled validation without system interruption |
| 1% threshold accuracy | Guaranteed over full industrial temperature range (-40°C to +85°C) - reduces design margin requirements and improves supply tolerance verification |
| Integrated BP regulator | 2.55V internal logic supply with dedicated 1µF bypass - isolates sensitive timing circuitry from noisy input rails |
Applications
| Telecom Power Management | Server PSU Monitoring |
|---|---|
Use Scenario: Supervising multiple DC-DC converter outputs (12V, 5V, 3.3V, 1.8V, 1.2V, 1.0V) in carrier-grade line cards where supply sequencing and fault isolation are critical. IC Role / Device Role / Timing Role: Hex-voltage supervisor providing simultaneous UV/OV detection, watchdog supervision, and margin testing capability across all rails. Use Value: Single-chip solution replaces six discrete supervisors and external watchdog IC, reducing BOM count and PCB area while improving timing correlation between rail faults. | Use Scenario: Monitoring redundant 12V, 5V, 3.3V, 2.5V, 1.8V, and 1.5V supplies in enterprise storage controllers where supply margining and graceful shutdown on overvoltage are required. IC Role / Device Role / Timing Role: Centralized power-good arbiter with active-low open-drain outputs driving system reset, fault interrupt, and watchdog reset chains. Use Value: 0.557V/0.643V fixed thresholds on all six inputs enable consistent margin testing across diverse supply voltages without recalibration. |
| Networking Switch Fabric | Industrial Control PLC |
Use Scenario: Ensuring stable operation of high-speed SerDes, PHY, and CPU power domains in 10G/25G Ethernet switches subject to transient load steps and thermal drift. IC Role / Device Role / Timing Role: Real-time supply health monitor with sub-25µs OV response and 200ms RESET hold time to prevent metastability during rail recovery. Use Value: 1% threshold accuracy and 10ppm/°C tempco ensure detection margins remain valid across extended temperature excursions in fanless enclosures. | Use Scenario: Validating robustness of isolated 24V, 12V, 5V, 3.3V, 1.8V, and 1.2V supplies in programmable logic controllers deployed in harsh factory environments. IC Role / Device Role / Timing Role: Fault-tolerant supervisor with MARGIN input enabling live supply stress testing without disrupting PLC program execution. Use Value: Margin disable function freezes RESET/OV/WDO states during intentional overvoltage testing - confirms system behavior under worst-case supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888QETE+ | Quad-input version (IN1–IN4 only); identical UV/OV thresholds (0.557V/0.643V), watchdog timing, and package | No IN5/IN6 support - suitable when only four supply rails require monitoring | Select MAX6888QETE+ to reduce cost and complexity in designs with ≤4 monitored rails |
| TPS3808G33DBVR | Single-channel supervisor with 3.3V fixed UV threshold; no OV detection, no watchdog, no margin disable | Lacks multi-rail coordination, overvoltage protection, and system-level test features | Choose only for simple single-rail reset generation where hex supervision and advanced features are unnecessary |
Compared with MAX6888QETE+, the MAX6887QETE+ provides two additional adjustable inputs for expanded rail coverage; compared with TPS3808G33DBVR, it delivers comprehensive multivoltage supervision, dual-mode watchdog, and margin testing - making it essential for complex, safety-critical systems.
Availability
MAX6887QETE+ is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and industrial control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6887QETE+ 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, sensing, connectivity, and security applications.
The MAX6887/MAX6888 product line delivers multivoltage supervisory circuits with integrated watchdog and margining functions specifically for high-reliability computing, networking, and telecom systems demanding coordinated power-rail monitoring.
FAQ
What is the undervoltage and overvoltage threshold configuration for MAX6887QETE+?
The MAX6887QETE+ has all six inputs (IN1–IN6) configured as adjustable ("Adj") per the Selector Guide, with factory-set undervoltage and overvoltage thresholds of 0.557V and 0.643V respectively. These thresholds are referenced to a 0.6V internal reference and support user-defined monitoring via external resistor dividers. The MAX6887QETE+ datasheet Table 1 confirms these values for the Q variant.
How does the watchdog timer operate in MAX6887QETE+?
The MAX6887QETE+ watchdog timer features two distinct timeout periods: an initial 102.4s period for microprocessor initialization, followed by a normal 1.6s period for runtime supervision. WDI must receive a valid edge transition (H→L or L→H) within the active timeout window to prevent WDO assertion. This dual-mode behavior is explicitly specified in the MAX6887QETE+ Electrical Characteristics table under parameter tWD.
What is the function of the MARGIN pin on MAX6887QETE+?
The MARGIN pin on MAX6887QETE+ allows system-level testing by holding RESET, OV, and WDO outputs in their current asserted or deasserted state during supply over/under-stress conditions. When pulled low, it overrides MR and freezes output states - enabling validation of system behavior under marginal supply conditions without triggering unintended resets. This function is documented in the MAX6887QETE+ Detailed Description section.
What package type and thermal considerations apply to MAX6887QETE+?
The MAX6887QETE+ uses a 16-pin thin QFN package (5mm × 5mm × 0.8mm) with exposed thermal pad (EP) internally connected to GND. The EP must be soldered to a PCB GND plane for optimal thermal dissipation and electrical performance. Absolute Maximum Ratings specify 1667mW continuous power dissipation at +70°C with 20.8mW/°C derating above that temperature.
Can MAX6887QETE+ be powered from VCC alone, and what are the voltage requirements?
Yes, MAX6887QETE+ can be powered from VCC alone, but only when all IN_ inputs are configured as "Adj" (as is the case for MAX6887QETE+). In this configuration, VCC must be externally supplied at ≥2.7V and brought up before any IN_ inputs. VCC must also be at least 200mV higher than the highest IN_ voltage applied. This requirement is stated in the MAX6887QETE+ Powering section and Note 4 of the Electrical Characteristics.
MAX6887QETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 6
- Voltage - Threshold:
- 6 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 180ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX6887QETE+ FAQ
1.How can I place an order for MAX6887QETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6887QETE+ 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 MAX6887QETE+ reliable?
The price and inventory of MAX6887QETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6887QETE+ is usually 5 days.
3.What payment methods are accepted for MAX6887QETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6887QETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6887QETE+?
MAX6887QETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6887QETE+ 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 MAX6887QETE+?
For technical support, including MAX6887QETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6887QETE+ requirements.
6.How does Aetrix verify that MAX6887QETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6887QETE+ 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 MAX6887QETE+ meets industry standards.
7.What is the process for return or replacement of MAX6887QETE+?
All MAX6887QETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6887QETE+, 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 MAX6887QETE+ part is unused and in its original packaging.
Return procedure for MAX6887QETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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