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Analog Devices Inc./Maxim Integrated MAX6887KETE+T
- Part No.:
- MAX6887KETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6887KETE+T.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6887KETE+T from Maxim Integrated is a hex-voltage supervisory IC with six factory-set voltage-detector inputs (IN1–IN6), undervoltage/overvoltage monitoring, 1% threshold accuracy, 180ms reset timeout, and integrated watchdog timer with 102.4s initial / 1.6s normal timeout periods. It operates from -40°C to +85°C in telecom and server power systems requiring multirail supply integrity verification.
For engineers reviewing the MAX6887KETE+T datasheet, MAX6887KETE+T pinout, MAX6887KETE+T application, or MAX6887KETE+T equivalent, this page delivers verified specifications, exact pin functions, real-world use cases in multivoltage systems, and two confirmed alternative parts with documented functional differences.
Technical Context
The MAX6887KETE+T implements six independent voltage detectors-each with matched undervoltage (UV) and overvoltage (OV) thresholds-and a dual-mode watchdog timer with configurable initial (102.4s) and normal (1.6s) timeout periods. All three outputs (RESET, OV, WDO) are active-low open-drain with guaranteed 0.4V VOL at 4mA sink current.
Power is derived from IN1–IN4 or VCC via internal virtual diode-ORing; the highest valid input (≥2.7V) supplies internal circuitry. BP provides a regulated +2.55V for logic, bypassed by a 1µF capacitor. Thresholds for MAX6887KETE+T are UV: 4.38V/2.88V/1.58V/0.527V/0.557V/0.557V and OV: 5.62V/3.70V/2.02V/0.673V/0.673V/0.673V per Tables 1 and 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V on IN1–IN4 or VCC - ensures operation across standard DC-DC output rails without external regulation |
| Threshold Accuracy | ±1% at +25°C, ±1.5% over -40°C to +85°C - enables precise margin testing of 5V/3.3V/1.8V rails |
| Reset Timeout Period | 180–220ms - guarantees sufficient hold time for microprocessor initialization after power stabilization |
| Watchdog Timeout | Initial: 92.16–112.64s; Normal: 1.44–1.76s - supports safe boot sequence then tight runtime supervision |
| Input Impedance | 130–300kΩ on IN1–IN4 - minimizes loading on monitored supplies while enabling high-resistor divider use for adjustable thresholds |
| Output Drive | 0.4V max VOL at 4mA sink - ensures reliable logic-level assertion into standard pull-up networks |
| Operating Temperature | -40°C to +85°C - validated for industrial-grade telecom and server board environments |
Pinout & Package
MAX6887KETE+T is housed in a 5mm × 5mm × 0.8mm, 16-pin thin QFN package with exposed pad (EP) internally connected to GND. The package supports high-density PCB layouts and efficient thermal dissipation.
| 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; asserts if WDI lacks valid edge 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; clears after 25µs once all inputs return within limits |
| 4 | GND | System ground reference; EP pad must be soldered to PCB ground plane for thermal and electrical integrity |
| 5 | MR | Manual reset input; internally pulled up to BP (10µA); 1µs minimum pulse width required to assert RESET; rejects 100ns glitches |
| 6 | MARGIN | Margin disable input; overrides MR and holds RESET/OV/WDO state during system stress testing; internally pulled up to BP (10µA) |
| 7 | WDI | Watchdog input; requires low-to-high or high-to-low transition within timeout window; internally pulldown (10µA) to GND |
| 8 | I.C. | Internal connection; no external connection required |
| 9 | VCC | Internal power-supply node; powered from highest of IN1–IN4; bypass with 1µF ceramic capacitor; not for external load sourcing |
| 10 | BP | Bypass voltage output (+2.55V nominal); powers internal logic; bypass with 1µF ceramic capacitor; not for external load sourcing |
| 11 | IN6 | Voltage detector input 6; monitors UV/OV with factory-set thresholds (0.557V UV / 0.673V OV); requires 0.1µF bypass to GND |
| 12 | IN5 | Voltage detector input 5; monitors UV/OV with factory-set thresholds (0.557V UV / 0.673V OV); requires 0.1µF bypass to GND |
| 13 | IN4 | Voltage detector input 4; monitors UV/OV with factory-set threshold (0.527V UV / 0.673V OV); powers device when ≥2.7V |
| 14 | IN3 | Voltage detector input 3; monitors UV/OV with factory-set threshold (1.580V UV / 2.020V OV); powers device when ≥2.7V |
| 15 | IN2 | Voltage detector input 2; monitors UV/OV with factory-set threshold (2.880V UV / 3.700V OV); powers device when ≥2.7V |
| 16 | IN1 | Voltage detector input 1; monitors UV/OV with factory-set threshold (4.380V UV / 5.620V OV); powers device when ≥2.7V |
Key Features
| Feature | Design Value |
|---|---|
| Hex voltage detection | Simultaneous monitoring of six independent supply rails (5V, 3.3V, 1.8V, and three adjustable inputs) eliminates need for multiple discrete supervisors |
| 1% UV/OV threshold accuracy | Enables precise power-rail margining tests without calibration overhead in production test environments |
| Dual-mode watchdog timer | 102.4s initial timeout allows full firmware boot before switching to 1.6s runtime supervision-reducing false resets during startup |
| Open-drain RESET/OV/WDO outputs | Supports wired-OR configuration with other system supervisors and compatibility with diverse logic families (CMOS/TTL) |
| Internal BP regulator (+2.55V) | Provides stable internal bias voltage independent of input rail fluctuations-ensuring consistent timing and threshold behavior |
Applications
| Telecom Power Management | Server Board Supervision |
|---|---|
Use Scenario: Monitoring redundant 12V, 5V, 3.3V, 2.5V, 1.8V, and 1.2V DC-DC outputs in carrier-grade line cards. IC Role / Device Role / Timing Role: Centralized supply integrity monitor asserting RESET on any rail failure and triggering watchdog-initiated recovery on processor lockup. Use Value: Prevents field failures due to undetected brownouts or overvoltages; 180ms reset timeout ensures clean reboot of baseband processors. | Use Scenario: Verifying stable power delivery to CPU, memory, and PCIe controllers in rack-mounted servers. IC Role / Device Role / Timing Role: Six-input supervisor validating core, I/O, and auxiliary voltages while providing fail-safe watchdog coverage for BMC and host CPUs. Use Value: Enables early detection of aging VRM components; 1% threshold accuracy supports automated margin testing during burn-in. |
| Networking Switch Fabric | Industrial Embedded Control |
Use Scenario: Ensuring clean power sequencing and continuous health monitoring of ASIC, PHY, and SerDes supplies in 10G/25G switches. IC Role / Device Role / Timing Role: Multirail supervisor with MARGIN input for in-system stress testing under overvoltage conditions without disrupting RESET state. Use Value: Allows validation of power integrity margins during design verification; adjustable IN5/IN6 inputs support custom SerDes bias rails. | Use Scenario: Supervising isolated 24V, 5V, 3.3V, and 1.8V rails in programmable logic controller (PLC) backplanes operating in harsh environments. IC Role / Device Role / Timing Role: Industrial-grade supervisor with -40°C to +85°C operation and robust glitch rejection on MR/WDI inputs. Use Value: Guarantees deterministic reset behavior despite EMI-induced transients; 100ns MR glitch rejection prevents spurious reboots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888KETE+T | Quad-input version (IN1–IN4 only); identical UV/OV thresholds for IN1–IN4; no IN5/IN6 pins; same 16-pin TQFN package | Lacks two voltage inputs-suitable only where ≤4 rails require monitoring | Select when system has exactly four critical supplies and board space constraints favor pin-compatible footprint reuse |
| TPS3808G33DBVR | Single-channel 3.3V supervisor with 200ms reset timeout; no watchdog or overvoltage detection; SOT-23-6 package | Monitors only one rail; no multivoltage capability or OV fault reporting | Choose only for simple single-rail applications where cost and size outweigh feature requirements |
Compared with MAX6888KETE+T, the MAX6887KETE+T provides two additional voltage-monitoring channels and full overvoltage reporting-critical for complex multirail systems-while TPS3808G33DBVR offers minimal functionality in a smaller package but cannot replace the six-input supervision capability.
Availability
MAX6887KETE+T is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, and industrial embedded control applications requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX6887KETE+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX6887/MAX6888 product line delivers multivoltage supervisory circuits optimized for high-reliability systems requiring simultaneous undervoltage, overvoltage, and watchdog monitoring across six independent supply rails.
FAQ
What are the factory-set undervoltage and overvoltage thresholds for MAX6887KETE+T?
The MAX6887KETE+T features factory-set thresholds per Table 1: IN1 UV = 4.380V / OV = 5.620V; IN2 UV = 2.880V / OV = 3.700V; IN3 UV = 1.580V / OV = 2.020V; IN4 UV = 0.527V / OV = 0.673V; IN5 and IN6 UV = 0.557V / OV = 0.673V. These values are specified at ±1.5% over -40°C to +85°C.
How does the watchdog timer operate in MAX6887KETE+T?
The MAX6887KETE+T watchdog timer has two modes: an initial timeout of 102.4s (allowing full microprocessor boot) followed by a normal timeout of 1.6s. WDO asserts low if WDI fails to toggle within the active timeout window. Connecting WDO to MR generates automatic system resets on timeout expiration.
Can MAX6887KETE+T monitor adjustable voltage thresholds?
Yes-IN4, IN5, and IN6 on MAX6887KETE+T are configured as adjustable inputs. External resistor dividers can set custom UV/OV thresholds using the equations provided in the datasheet, with reference points based on 0.6V ±7.5% (UV) and ±12.5% (OV).
What is the function of the MARGIN pin on MAX6887KETE+T?
The MARGIN pin on MAX6887KETE+T holds RESET, OV, and WDO in their current asserted or deasserted states during system-level stress testing-even if monitored voltages exceed normal operating ranges. When pulled low, it overrides MR and maintains output stability for controlled validation.
Does MAX6887KETE+T require external bypass capacitors?
Yes-MAX6887KETE+T requires a 1µF ceramic capacitor from VCC to GND and another from BP to GND, placed as close to the device as possible. Each voltage-detector input (IN1–IN6) also needs a 0.1µF ceramic capacitor to GND for noise immunity, per layout guidelines.
MAX6887KETE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MAX6887KETE+T FAQ
1.How can I place an order for MAX6887KETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6887KETE+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 MAX6887KETE+T reliable?
The price and inventory of MAX6887KETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6887KETE+T is usually 5 days.
3.What payment methods are accepted for MAX6887KETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6887KETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6887KETE+T?
MAX6887KETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6887KETE+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 MAX6887KETE+T?
For technical support, including MAX6887KETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6887KETE+T requirements.
6.How does Aetrix verify that MAX6887KETE+T is sourced from the original manufacturer or authorized distributors?
All MAX6887KETE+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 MAX6887KETE+T meets industry standards.
7.What is the process for return or replacement of MAX6887KETE+T?
All MAX6887KETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6887KETE+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 MAX6887KETE+T part is unused and in its original packaging.
Return procedure for MAX6887KETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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