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Analog Devices Inc./Maxim Integrated MAX6887AETE+
- Part No.:
- MAX6887AETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6887AETE+.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,508
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Product details
Overview
MAX6887AETE+ from Maxim Integrated is a hex-voltage supervisory IC with six factory-set voltage-detector inputs (IN1–IN6), dual-threshold (undervoltage/overvoltage) monitoring, active-low open-drain RESET/OV/WDO outputs, and a watchdog timer with 102.4s initial and 1.6s normal timeout periods. It operates from -40°C to +85°C in multivoltage server power systems where precise supply sequencing and fault detection are critical.
For engineers reviewing the MAX6887AETE+ datasheet, MAX6887AETE+ pinout, MAX6887AETE+ application, or MAX6887AETE+ equivalent, this page delivers verified specifications-including 1% threshold accuracy, 180ms reset timeout, 5mm × 5mm 16-pin thin QFN package, and 2.7V–5.8V operating range-to support robust power-supply monitoring design and component selection.
Technical Context
The MAX6887AETE+ implements independent undervoltage and overvoltage comparators per input, each with ±1% threshold accuracy over temperature and 0.3% hysteresis. Its virtual diode-ORing architecture selects the highest of IN1–IN4 (or VCC) as the internal supply, enabling operation across mixed-rail systems without external biasing.
It integrates three timing blocks: a 200ms RESET timeout, 25µs OV timeout, and configurable watchdog with distinct initial (102.4s) and normal (1.6s) periods. The MARGIN input overrides MR and holds output states during system margin testing, while WDI accepts low-to-high or high-to-low transitions to reset the watchdog timer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V - supports direct connection to standard DC-DC outputs (1.5V–5V rails via adjustable thresholds) |
| Undervoltage Threshold Accuracy | ±1% - ensures reliable detection of 5% supply droop on nominal 5.0V/3.3V/2.5V/1.8V rails (IN1=4.62V, IN2=3.06V, IN3=2.31V, IN4=1.67V) |
| Reset Timeout Period | 180–220ms - guarantees sufficient hold time for microprocessor initialization after power stabilization |
| Watchdog Timeout (Normal) | 1.44–1.76s - provides responsive fault recovery for embedded firmware execution monitoring |
| Input Impedance (IN1–IN4) | 130–300kΩ - minimizes loading on monitored supplies while maintaining noise immunity |
| Operating Temperature | -40°C to +85°C - qualified for industrial and telecom infrastructure environments |
| Package | 16-pin thin QFN (5mm × 5mm × 0.8mm) with exposed pad - enables high-density PCB layout and thermal dissipation |
Pinout & Package
MAX6887AETE+ uses a 16-pin thin QFN package (5mm × 5mm, 0.8mm height) with exposed thermal pad connected to GND. Pin 1 is marked by a dot; the exposed pad must be soldered to a GND plane for optimal thermal performance and EMI suppression.
| 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 for ≥180ms after fault clearance |
| 2 | WDO | Active-low open-drain watchdog output; goes low if WDI is not strobed within timeout period; used to trigger system reset when connected to MR |
| 3 | OV | Active-low open-drain overvoltage output; asserts when any input exceeds OV threshold; stays low for 25µs after all OV conditions clear |
| 4 | GND | System ground reference and return path for all internal circuits and outputs |
| 5 | MR | Manual reset input; internally pulled up to BP (2.55V) via 10µA current source; 1µs minimum pulse width required to assert RESET |
| 6 | MARGIN | Margin disable input; when low, freezes RESET/OV/WDO states regardless of input voltage or watchdog status; overrides MR if both asserted |
| 7 | WDI | Watchdog timer input; internally pulldown-biased (10µA); requires rising or falling edge transition every 1.6s (normal mode) to prevent WDO assertion |
| 8 | I.C. | Internal connection - no external connection required |
| 9 | VCC | Internal power-supply node; derived from highest of IN1–IN4 (≥2.7V); bypass to GND with 1µF ceramic capacitor |
| 10 | BP | Bypass voltage output (2.55V nominal); powers internal logic; bypass to GND with 1µF ceramic capacitor; not for external load |
| 11 | IN6 | Voltage detector input 6; monitors both UV (0.557V) and OV (0.643V); requires 0.1µF bypass to GND; cannot power device |
| 12 | IN5 | Voltage detector input 5; monitors both UV (0.557V) and OV (0.643V); requires 0.1µF bypass to GND; cannot power device |
| 13 | IN4 | Voltage detector input 4; monitors UV (1.670V) and OV (1.930V); powers device when ≥2.7V; bypass to GND with 0.1µF capacitor |
| 14 | IN3 | Voltage detector input 3; monitors UV (2.310V) and OV (2.680V); powers device when ≥2.7V; bypass to GND with 0.1µF capacitor |
| 15 | IN2 | Voltage detector input 2; monitors UV (3.060V) and OV (3.540V); powers device when ≥2.7V; bypass to GND with 0.1µF capacitor |
| 16 | IN1 | Voltage detector input 1; monitors UV (4.620V) and OV (5.360V); powers device when ≥2.7V; bypass to GND with 0.1µF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Hex voltage detection | Simultaneous monitoring of six independent supply rails (5.0V/3.3V/2.5V/1.8V/Adj/Adj) with dedicated UV/OV comparators per rail |
| 1% threshold accuracy | Guaranteed over full -40°C to +85°C range-enables precise fault detection without calibration in production systems |
| Configurable watchdog timer | Two-stage timeout (102.4s init / 1.6s normal) allows safe µP boot sequence followed by tight runtime supervision |
| Margin disable function | MARGIN input holds RESET/OV/WDO in current state during system-level stress testing, preventing spurious resets |
| Open-drain outputs | RESET, OV, and WDO support wired-OR logic and flexible pullup voltage selection (e.g., 3.3V or 5V domains) |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
|
Use Scenario: Coordinating startup/shutdown of multiple DC-DC converters (12V, 5V, 3.3V, 2.5V, 1.8V, 1.2V) in rack-mounted servers. IC Role / Device Role / Timing Role: Supervisory controller that asserts RESET only after all rails stabilize within ±5%, then releases RESET after 200ms delay. Use Value: Prevents CPU lockup due to out-of-spec supply sequencing; eliminates need for discrete RC timers or FPGA-based sequencing logic. |
Use Scenario: Real-time monitoring of primary and backup power supplies in carrier-grade Ethernet switches. IC Role / Device Role / Timing Role: Dual-threshold detector triggering OV alarm on 3.3V rail overvoltage (>3.54V) and UV shutdown on 12V bias rail (<11.4V). Use Value: Enables immediate failover to redundant PSU before damage occurs; 25µs OV timeout ensures rapid response to transient surges. |
| Industrial PLC Backplane | Network Storage Controller |
|
Use Scenario: Ensuring stable operation of FPGA, DDR memory, and I/O interfaces across varying ambient temperatures (-40°C to +85°C). IC Role / Device Role / Timing Role: Hex-supervisor providing rail-specific UV/OV detection plus watchdog supervision of control firmware. Use Value: 1% threshold accuracy maintains detection integrity at temperature extremes; MARGIN input allows safe voltage margin testing without disrupting operation. |
Use Scenario: Protecting RAID controller ASICs and SAS/SATA PHYs from supply faults in enterprise NAS enclosures. IC Role / Device Role / Timing Role: Centralized supervisor asserting global RESET when any of six critical rails (core, I/O, memory, PHY, auxiliary, standby) fails. Use Value: Reduces BOM count vs. discrete supervisors; 16-pin QFN footprint saves board space in thermally constrained 1U chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888AETE+ | Quad-input version (IN1–IN4 only); identical UV/OV thresholds, watchdog timing, and pinout for first 12 pins; lacks IN5/IN6 | Suitable for 4-rail systems only; cannot monitor sixth rail like MAX6887AETE+ | Select MAX6888AETE+ when system has ≤4 critical supplies and board space or cost optimization is prioritized. |
| TPS3808G33DBVR | Single-channel supervisor with 3.3V fixed UV threshold; no OV detection, no watchdog, no multi-rail capability | Requires multiple units to match MAX6887AETE+ functionality; no margin disable or WDI interface | Choose only for simple single-rail reset generation where hex supervision and fault diagnostics are unnecessary. |
Compared with MAX6888AETE+, the MAX6887AETE+ adds two extra voltage-monitoring channels and supports more complex multirail architectures, while TPS3808G33DBVR offers minimal functionality at lower cost but demands significant design effort to scale to six rails.
Availability
MAX6887AETE+ is available at Aetrix Electronics and suitable for server/workstation power management, telecom infrastructure monitoring, and industrial PLC backplane supervision requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6887AETE+ 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 was engineered specifically for multivoltage system supervision-delivering integrated hex/quad voltage monitoring, watchdog safety, and margin test features in compact QFN packages for high-reliability infrastructure equipment.
FAQ
What voltage thresholds does the MAX6887AETE+ monitor on its six inputs?
The MAX6887AETE+ monitors factory-set thresholds: IN1 = 4.620V UV / 5.360V OV, IN2 = 3.060V UV / 3.540V OV, IN3 = 2.310V UV / 2.680V OV, IN4 = 1.670V UV / 1.930V OV, and IN5/IN6 = 0.557V UV / 0.643V OV. These values are specified in Table 1 of the MAX6887 datasheet and reflect ±1% accuracy over temperature. The MAX6887AETE+ does not support user-adjustable thresholds on these fixed variants.
Can the MAX6887AETE+ be powered from a single supply rail?
Yes-the MAX6887AETE+ can be powered from any one of IN1–IN4 or the VCC pin using Maxim's virtual diode-ORing architecture. The internal circuitry automatically selects the highest valid input (≥2.7V) as the supply source. For example, connecting 5.0V to IN1 powers the entire device, eliminating need for an external VCC supply. This feature simplifies power domain integration in multirail systems.
How does the watchdog timer in the MAX6887AETE+ operate during processor boot?
The MAX6887AETE+ watchdog uses a two-phase timeout: an initial 102.4s period begins immediately after power-up (tD-PO ≈ 2.5ms), allowing ample time for µP initialization and firmware loading. Once the first WDI transition occurs, it switches to the normal 1.6s timeout. If no WDI edge is detected within that window, WDO asserts low-enabling automatic recovery from hung boot code without manual intervention.
What is the purpose of the MARGIN input on the MAX6887AETE+?
The MARGIN input on the MAX6887AETE+ holds RESET, OV, and WDO in their current logic states-regardless of input voltage conditions or watchdog expiration-when pulled low. This allows safe system-level voltage margin testing (e.g., raising 3.3V rail to 3.6V) without triggering false resets. MARGIN overrides MR if both are asserted simultaneously, ensuring test-mode priority.
Does the MAX6887AETE+ require external pullup resistors on its open-drain outputs?
Yes-RESET, OV, and WDO are active-low open-drain outputs and require external pullup resistors to their respective logic domains (e.g., 3.3V for a 3.3V µP reset line). Typical values range from 4.7kΩ to 10kΩ. Pullups ensure defined high-state voltage when outputs are inactive; omission causes floating nodes and unreliable system behavior. The MAX6887AETE+ datasheet specifies VOL ≤ 0.4V at ISINK = 4mA.
MAX6887AETE+ 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)
MAX6887AETE+ FAQ
1.How can I place an order for MAX6887AETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6887AETE+ 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 MAX6887AETE+ reliable?
The price and inventory of MAX6887AETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6887AETE+ is usually 5 days.
3.What payment methods are accepted for MAX6887AETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6887AETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6887AETE+?
MAX6887AETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6887AETE+ 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 MAX6887AETE+?
For technical support, including MAX6887AETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6887AETE+ requirements.
6.How does Aetrix verify that MAX6887AETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6887AETE+ 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 MAX6887AETE+ meets industry standards.
7.What is the process for return or replacement of MAX6887AETE+?
All MAX6887AETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6887AETE+, 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 MAX6887AETE+ part is unused and in its original packaging.
Return procedure for MAX6887AETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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