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Analog Devices Inc./Maxim Integrated MAX6888OETE+
- Part No.:
- MAX6888OETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888OETE+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
MAX6888OETE+ from Maxim Integrated is a quad-voltage, overvoltage/undervoltage supervisory IC with 10% threshold tolerance, active-low open-drain RESET/OV/WDO outputs, and dual-mode watchdog timer (102.4s initial / 1.6s normal timeout). It monitors four supply rails-including 3.3V and 2.5V-within -40°C to +85°C for telecom and server power sequencing.
For engineers reviewing the MAX6888OETE+ datasheet, MAX6888OETE+ pinout, MAX6888OETE+ application, or MAX6888OETE+ equivalent, this page delivers verified electrical parameters, terminal roles, thermal operating range, watchdog timing behavior, and confirmed alternative parts for multivoltage system supervision.
Technical Context
The MAX6888OETE+ implements independent undervoltage and overvoltage detection per input using factory-set thresholds (IN1 = 2.88V UV / 3.70V OV; IN2 = 2.19V UV / 2.81V OV; IN3–IN4 = 0.527V UV / 0.673V OV), with ±1.5% accuracy over temperature. Its virtual diode-OR power selection logic derives internal supply from the highest of IN1–IN4 (≥2.7V required).
It integrates a two-phase watchdog timer: initial timeout (102.4s) enables microprocessor initialization before switching to normal 1.6s timeout; WDO assertion triggers reset when WDI fails to toggle. All three outputs (RESET, OV, WDO) are open-drain, requiring external pullups and offering 200ms RESET timeout and 25µs OV timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V on any IN1–IN4 or VCC - ensures operation across common DC-DC output rails |
| UV/OV Threshold Accuracy | ±1.5% over -40°C to +85°C - guarantees reliable trip points under industrial thermal stress |
| RESET Timeout Period | 180–220ms - holds system reset long enough for full power stabilization after fault clearance |
| Watchdog Timeout | 102.4s (initial), 1.6s (normal) - accommodates boot firmware execution then tight runtime monitoring |
| Output Type | Active-low open-drain (RESET/OV/WDO) - enables wired-OR logic and voltage-level translation |
| Input Leakage Current | ±150nA on adjustable inputs - minimizes divider error in user-defined threshold configurations |
| Operating Temperature | -40°C to +85°C - qualified for telecom infrastructure and enterprise storage environments |
Pinout & Package
MAX6888OETE+ uses a 5mm × 5mm × 0.8mm, 16-pin thin QFN package with exposed pad (EP) internally connected to GND. Pin 1 is RESET; pins 11–12 are no-connect (N.C.) - distinct from MAX6887's IN5/IN6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low open-drain reset output | Asserts low for ≥200ms when any monitored rail falls below UV threshold or MR is pulled low |
| 2 (WDO) | Active-low open-drain watchdog output | Asserts low if WDI fails to toggle within 1.6s (normal mode); connects to MR to auto-generate resets |
| 3 (OV) | Active-low open-drain overvoltage output | Asserts low for ≥25µs when any rail exceeds OV threshold; enables fast fault isolation |
| 4 (GND) | Ground reference | Common return for all analog/digital circuitry; EP must be soldered to PCB ground plane |
| 5 (MR) | Manual reset input | Pull low ≥1µs to force RESET; 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 system margin testing; overrides MR if both asserted |
| 7 (WDI) | Watchdog input | Accepts rising/falling edges; internally pulled down to GND via 10µA sink; rejects <100ns glitches |
| 8 (I.C.) | Internal connection | No external connection required; leave unconnected |
| 9 (VCC) | Internal power-supply node | Internally generated from max(IN1–IN4); bypass with 1µF ceramic capacitor; not for external load |
| 10 (BP) | Bypass voltage output | 2.55V internal LDO output powering logic; bypass with 1µF ceramic; not for external load |
| 13–16 (IN4–IN1) | Supply voltage detector inputs | Monitor rails simultaneously; IN1=2.88V/3.70V, IN2=2.19V/2.81V, IN3/IN4=0.527V/0.673V UV/OV thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV detectors | Four factory-set thresholds (2.88V/3.70V, 2.19V/2.81V, 0.527V/0.673V, 0.527V/0.673V) eliminate need for external comparators |
| Dual-mode watchdog timer | 102.4s initial timeout supports safe processor boot; 1.6s normal timeout detects runtime lockups without false triggers |
| Margin disable function | MARGIN pin freezes all outputs during supply margining tests - prevents spurious resets while validating over/under-spec conditions |
| Open-drain outputs with 4mA sink capability | RESET/OV/WDO drive standard 3.3V/5V logic buses directly; VOL ≤0.4V at 4mA ensures solid low-state noise margin |
| Virtual diode-OR power selection | Automatically selects highest valid IN1–IN4 (≥2.7V) as internal supply - simplifies multi-rail board power architecture |
Applications
| Telecom Power Sequencing | Server PSU Monitoring |
|---|---|
|
Use Scenario: Supervising 12V, 5V, 3.3V, and 2.5V rails in carrier-grade line cards where simultaneous UV/OV faults must trigger coordinated shutdown. IC Role / Device Role / Timing Role: Quad-detector supervisor asserting RESET within 20µs of first rail fault and holding for 200ms to ensure clean system reset. Use Value: Prevents latch-up and data corruption by guaranteeing all supplies stabilize before processor release. |
Use Scenario: Monitoring redundant 3.3V and 2.5V auxiliary rails in rack-mounted servers, with adjustable thresholds for custom low-voltage domains. IC Role / Device Role / Timing Role: Voltage supervisor detecting undervoltage on dual 3.3V/2.5V rails and asserting OV on overvoltage events with 25µs response. Use Value: Enables rapid isolation of faulty PSUs while maintaining uptime on healthy rails via open-drain OR-ing. |
| Networking Switch Fabric | Industrial Embedded Controller |
|
Use Scenario: Securing FPGA configuration and PHY power integrity in 10G Ethernet switches where transient overvoltage on 1.8V I/O rails risks interface damage. IC Role / Device Role / Timing Role: Dedicated OV detector on 1.8V-equivalent input (0.527V UV / 0.673V OV) triggering immediate OV assertion. Use Value: Limits exposure time to overvoltage transients to ≤25µs, protecting sensitive SerDes interfaces. |
Use Scenario: Enabling watchdog-secured boot in programmable logic controllers with extended initialization sequences (e.g., FPGA bitstream loading). IC Role / Device Role / Timing Role: Dual-mode watchdog providing 102.4s initial window for FPGA configuration before enforcing 1.6s runtime checks. Use Value: Eliminates need for external RC timers or secondary supervisors - reduces BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6887OETE+ | Six-input version with identical IN1–IN4 thresholds but adds IN5/IN6 (0.527V/0.673V); same 10% tolerance and watchdog timing | Required when monitoring >4 rails; occupies same 16-pin QFN footprint but uses pins 11–12 for IN5/IN6 | Select MAX6887OETE+ only if fifth/sixth rail supervision is needed; otherwise MAX6888OETE+ saves routing complexity |
| TPS3808G33DBVR | Single 3.3V supervisor with 200ms reset timeout; no OV detection, no watchdog, no multi-rail capability | Limited to single-rail systems; lacks quad monitoring, overvoltage response, and watchdog functionality | Use only for cost-sensitive, single-rail applications where MAX6888OETE+ features are unnecessary |
Compared with MAX6887OETE+, MAX6888OETE+ removes two detector inputs to simplify layout and reduce pin count while retaining identical threshold accuracy, watchdog behavior, and thermal rating - making it optimal for four-rail systems. Against TPS3808G33DBVR, MAX6888OETE+ provides integrated quad-rail supervision, OV fault signaling, and watchdog safety - eliminating multiple discrete supervisors.
Availability
MAX6888OETE+ is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and networking equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6888OETE+ 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 high-reliability industrial, communications, and computing applications.
The MAX6887/MAX6888 family delivers multivoltage supervision with integrated watchdog and margining for complex power architectures in telecom, servers, and storage systems.
FAQ
What are the factory-set undervoltage and overvoltage thresholds for MAX6888OETE+?
The MAX6888OETE+ has four fixed thresholds: IN1 = 2.88V UV / 3.70V OV; IN2 = 2.19V UV / 2.81V OV; IN3 = 0.527V UV / 0.673V OV; IN4 = 0.527V UV / 0.673V OV. These values are specified in Table 2 of the datasheet and reflect 10% tolerance across -40°C to +85°C. The MAX6888OETE+ does not support adjustable thresholds on these inputs.
How does the watchdog timer operate in MAX6888OETE+ during power-up and runtime?
The MAX6888OETE+ watchdog starts with a 102.4s initial timeout after power-up (tD-PO delay), allowing microprocessor initialization. Once WDI receives its first valid edge, it switches to 1.6s normal timeout. If WDI fails to toggle within that period, WDO asserts low. Connecting WDO to MR causes automatic reset with ~5µs pulse width, clearing the watchdog and restarting the cycle.
Can MAX6888OETE+ be powered solely from VCC, or must it use IN1–IN4?
The MAX6888OETE+ can be powered from VCC only if all IN1–IN4 are configured as "Adj" (adjustable) inputs - otherwise, it requires at least one IN1–IN4 ≥2.7V to power the device via internal virtual diode-OR logic. When externally supplying VCC, it must exceed the highest IN1–IN4 voltage by ≥200mV and be ramped first.
What is the function of the MARGIN pin on MAX6888OETE+ and how does it interact with MR?
The MARGIN pin on MAX6888OETE+ holds RESET, OV, and WDO in their current state during system-level margin testing - preventing spurious resets when supplies are intentionally driven beyond spec. When both MARGIN and MR are asserted, MARGIN takes priority and overrides MR, freezing outputs until MARGIN is released.
Does MAX6888OETE+ require external pullup resistors on its open-drain outputs?
Yes, MAX6888OETE+ requires external pullup resistors on RESET, OV, and WDO because all three are active-low open-drain outputs. Typical values range from 4.7kΩ to 10kΩ to 3.3V or 5V rails. Without pullups, outputs cannot achieve valid high logic levels, rendering the MAX6888OETE+ nonfunctional in most system interfaces.
MAX6888OETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.5V, 3.3V, Adj, Adj
- 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)
MAX6888OETE+ FAQ
1.How can I place an order for MAX6888OETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888OETE+ 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 MAX6888OETE+ reliable?
The price and inventory of MAX6888OETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888OETE+ is usually 5 days.
3.What payment methods are accepted for MAX6888OETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888OETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888OETE+?
MAX6888OETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888OETE+ 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 MAX6888OETE+?
For technical support, including MAX6888OETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888OETE+ requirements.
6.How does Aetrix verify that MAX6888OETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6888OETE+ 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 MAX6888OETE+ meets industry standards.
7.What is the process for return or replacement of MAX6888OETE+?
All MAX6888OETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888OETE+, 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 MAX6888OETE+ part is unused and in its original packaging.
Return procedure for MAX6888OETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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