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Analog Devices Inc./Maxim Integrated MAX6887RETE+
- Part No.:
- MAX6887RETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6887RETE+.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,881
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Product details
Overview
MAX6887RETE+ from Maxim Integrated is a hex-voltage supervisory IC with six adjustable undervoltage/overvoltage detector inputs, active-low open-drain RESET/OV/WDO outputs, 10% threshold tolerance, and dual-mode watchdog timer (102.4s initial / 1.6s normal timeout). It operates from -40°C to +85°C in telecom power systems requiring multi-rail monitoring and fail-safe reset generation.
For engineers reviewing the MAX6887RETE+ datasheet, MAX6887RETE+ pinout, MAX6887RETE+ application, or MAX6887RETE+ equivalent, this page delivers verified specifications, validated pin functions, confirmed timing behavior (200ms RESET timeout, 25µs OV timeout), and real-world substitution guidance for multivoltage server and networking supply supervision.
Technical Context
The MAX6887RETE+ implements six independent voltage detectors-each with factory-trimmed ±10% undervoltage (0.527V) and overvoltage (0.673V) thresholds-enabling user-defined monitoring via external resistor dividers on all IN1–IN6 pins. Its virtual diode-OR power architecture selects the highest of IN1–IN4 (≥2.7V) or VCC to supply internal circuitry.
It integrates a two-phase watchdog timer: initial timeout (102.4s) supports µP boot initialization, while normal timeout (1.6s) detects runtime stalls. WDO assertion triggers RESET when connected to MR, and MARGIN input overrides all outputs during system margin testing without affecting timing behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V on IN1–IN4 or VCC; powers internal logic only-cannot drive external loads |
| Undervoltage Threshold | 0.527V ±10% per input; enables precise low-voltage rail monitoring (e.g., 1.2V core supplies via divider) |
| Overvoltage Threshold | 0.673V ±10% per input; provides fast overvoltage fault detection with 25µs output hold time |
| RESET Timeout Period | 180–220ms; ensures stable processor reset after supply recovery or manual trigger |
| Watchdog Timeout | 102.4s (initial), 1.6s (normal); accommodates boot sequence then enforces runtime software health checks |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade telecom and server environments |
| Package | 16-pin thin QFN (5mm × 5mm × 0.8mm) with exposed pad; supports high-density PCB layouts and thermal dissipation |
Pinout & Package
MAX6887RETE+ uses a 16-pin thin QFN package (5mm × 5mm × 0.8mm) with exposed thermal pad (EP) internally connected to GND. The package is RoHS-compliant and optimized for thermal performance in high-reliability power systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low open-drain reset output | Asserts when any input falls below 0.527V or MR is pulled low; holds low for 200ms after fault clearance |
| 2 (WDO) | Active-low open-drain watchdog output | Asserts after 102.4s (initial) or 1.6s (normal) watchdog timeout; connects to MR to auto-generate resets |
| 3 (OV) | Active-low open-drain overvoltage output | Asserts when any input exceeds 0.673V; remains low for 25µs after all overvoltages clear |
| 4 (GND) | Ground reference | Common return path for all analog/digital circuitry and EP thermal pad connection point |
| 5 (MR) | Manual reset input | Pulled up to BP via 10µA current source; 1µs minimum pulse width required to assert RESET |
| 6 (MARGIN) | Output state hold control | Overrides MR and detector outputs when low; maintains RESET/OV/WDO state during margin testing |
| 7 (WDI) | Watchdog timer input | Internally pulled down; requires low-to-high or high-to-low transition within timeout period to prevent WDO assertion |
| 9 (VCC) | Internal power-supply voltage node | Derived from highest IN1–IN4 voltage; bypassed with 1µF ceramic capacitor; not for external powering |
| 10 (BP) | Bypass voltage for internal logic | Stable +2.55V internal supply; bypassed with 1µF ceramic capacitor; not for external powering |
| 11–16 (IN6–IN1) | Adjustable voltage detector inputs | All six inputs monitor undervoltage (0.527V) and overvoltage (0.673V); require external dividers for rails >0.6V |
Key Features
| Feature | Design Value |
|---|---|
| Hex adjustable voltage detectors | All six inputs support user-defined thresholds via external resistor dividers-no fixed-voltage constraints |
| ±10% threshold accuracy | Guaranteed over -40°C to +85°C; enables reliable detection across temperature extremes in telecom gear |
| Dual-mode watchdog timer | 102.4s initial timeout prevents premature reset during boot; 1.6s normal timeout catches runtime hangs |
| Active-low open-drain outputs | RESET, OV, WDO each sink 4mA at 0.4V; compatible with mixed-voltage systems using external pullups |
| MARGIN override function | Holds all outputs in current state during system-level stress testing-no spurious resets during validation |
Applications
| Telecom Power Shelf Monitoring | Server CPU Core Supply Supervision |
|---|---|
Use Scenario: Monitoring multiple DC-DC outputs (12V, 5V, 3.3V, 1.8V, 1.2V, 1.0V) in a carrier-grade power shelf with hot-swap capability. IC Role / Device Role / Timing Role: Centralized supervisory hub detecting undervoltage/overvoltage faults across all rails and asserting system-wide RESET. Use Value: Prevents field failures by catching marginal supply conditions before they corrupt FPGA configuration or memory subsystems. | Use Scenario: Validating tight-tolerance core voltages (e.g., 1.2V ±3%) on high-end server CPUs during burn-in and thermal stress testing. IC Role / Device Role / Timing Role: Adjustable-threshold detector providing precise UV/OV detection aligned to CPU VID requirements. Use Value: Enables margin testing via MARGIN pin-holds RESET asserted while supplies are swept beyond nominal range. |
| Industrial Network Switch PSU | Storage Controller Power Sequencing |
Use Scenario: Supervising isolated 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, and 1.0V rails in a Layer-3 switch with redundant PSUs. IC Role / Device Role / Timing Role: Fault-detection engine triggering graceful shutdown via WDO→MR linkage when watchdog expires due to firmware lockup. Use Value: Eliminates need for discrete comparators and timers-reduces BOM count and layout area in space-constrained switch modules. | Use Scenario: Coordinating power-up sequencing and fault response for NVMe controller, DRAM, and flash memory rails in enterprise SSDs. IC Role / Device Role / Timing Role: Synchronized supervisor ensuring RESET deassertion only after all supplies stabilize and watchdog clears. Use Value: Guarantees deterministic boot by enforcing 200ms RESET timeout after last rail reaches regulation-prevents partial initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888RETE+ | Quad-input version (IN1–IN4 only); identical 0.527V/0.673V thresholds, 10% tolerance, and watchdog timing | No IN5/IN6-suitable where only four rails require monitoring; same footprint and pinout except IN5/IN6 replaced by N.C. | Select MAX6888RETE+ when system has ≤4 critical supplies and board space must be minimized. |
| TPS386000RGPT | Triple adjustable UV/OV detector (not hex); 0.4V–5.8V threshold range; 1.5% accuracy vs. 10% for MAX6887RETE+ | Lacks integrated watchdog timer; requires external timing components for reset supervision | Choose TPS386000RGPT when higher threshold precision is mandatory and watchdog functionality is implemented separately. |
Compared with MAX6887RETE+, MAX6888RETE+ reduces channel count but retains full compatibility for 4-rail systems, while TPS386000RGPT trades integration for tighter threshold accuracy-making it suitable only when watchdog independence and sub-1% UV/OV matching are design priorities.
Availability
MAX6887RETE+ is available at Aetrix Electronics and suitable for telecom power shelves, server CPU core monitoring, industrial network switches, and enterprise storage controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6887RETE+ 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 demanding industrial, communications, and computing applications.
The MAX6887/MAX6888 family targets multivoltage power-supply supervision in high-reliability systems-delivering integrated voltage detection, watchdog safety, and flexible reset control in compact QFN packages.
FAQ
What is the exact undervoltage and overvoltage threshold for MAX6887RETE+?
The MAX6887RETE+ features factory-set thresholds of 0.527V ±10% for undervoltage detection and 0.673V ±10% for overvoltage detection on all six inputs (IN1–IN6). These values are specified in Table 1 of the datasheet and apply across the full -40°C to +85°C operating range. Each input requires an external resistor divider to scale higher supply voltages to these reference levels.
Can MAX6887RETE+ be powered solely from VCC, or must it use IN1–IN4?
MAX6887RETE+ can be powered from VCC, but only if all IN1–IN6 are configured as adjustable inputs (as is the case for MAX6887RETE+). Per datasheet Note 4, versions Q and R-including MAX6887RETE+-require external VCC supply because none of the INx pins are preconfigured for fixed-voltage monitoring. VCC must be ≥200mV higher than any INx voltage and brought up first.
How does the MARGIN pin affect RESET, OV, and WDO outputs in MAX6887RETE+?
When the MARGIN pin is pulled low, MAX6887RETE+ holds RESET, OV, and WDO in their current asserted or deasserted states regardless of subsequent changes to monitored input voltages or watchdog timer expiration. This allows safe system-level margin testing-e.g., sweeping supply voltages beyond nominal-without triggering unintended resets. MARGIN overrides MR if both are asserted simultaneously.
What is the watchdog timeout behavior of MAX6887RETE+ during power-up and runtime?
At power-up, MAX6887RETE+ enters an initial watchdog timeout period of 102.4s, allowing sufficient time for microprocessor initialization. After WDO goes high, the normal timeout period of 1.6s takes effect. If WDI is not toggled within that window, WDO asserts. Connecting WDO to MR causes automatic RESET assertion-clearing the watchdog and holding RESET for its 200ms timeout.
Does MAX6887RETE+ support simultaneous monitoring of six different supply rails?
Yes, MAX6887RETE+ supports true six-rail monitoring via IN1 through IN6, each independently configurable with external resistor dividers to detect undervoltage (0.527V) and overvoltage (0.673V) conditions. All six inputs are functional-unlike MAX6888 variants-and share identical electrical characteristics, enabling consolidated supervision of complex multivoltage systems like 1U servers or modular telecom line cards.
MAX6887RETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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)
MAX6887RETE+ FAQ
1.How can I place an order for MAX6887RETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6887RETE+ 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 MAX6887RETE+ reliable?
The price and inventory of MAX6887RETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6887RETE+ is usually 5 days.
3.What payment methods are accepted for MAX6887RETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6887RETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6887RETE+?
MAX6887RETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6887RETE+ 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 MAX6887RETE+?
For technical support, including MAX6887RETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6887RETE+ requirements.
6.How does Aetrix verify that MAX6887RETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6887RETE+ 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 MAX6887RETE+ meets industry standards.
7.What is the process for return or replacement of MAX6887RETE+?
All MAX6887RETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6887RETE+, 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 MAX6887RETE+ part is unused and in its original packaging.
Return procedure for MAX6887RETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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