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Analog Devices Inc./Maxim Integrated MAX6888IETE+
- Part No.:
- MAX6888IETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888IETE+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,325
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Product details
Overview
The MAX6888IETE+ from Maxim Integrated is a quad-voltage, overvoltage/undervoltage supervisory IC with integrated watchdog timer, active-low open-drain RESET/OV/WDO outputs, and factory-set thresholds for 5.0V, 3.3V, 2.5V, and 1.8V supplies - used in multivoltage server and telecom power monitoring systems.
For engineers reviewing the MAX6888IETE+ datasheet, MAX6888IETE+ pinout, MAX6888IETE+ application, or MAX6888IETE+ equivalent, key selection criteria include its 10% threshold tolerance, 180–220ms RESET timeout, 102.4s/1.6s dual-mode watchdog, -40°C to +85°C operation, and 16-pin thin QFN package with exposed pad.
Technical Context
The MAX6888IETE+ implements four independent voltage detectors with matched undervoltage (UV) and overvoltage (OV) thresholds per input, each with ±1.5% accuracy over temperature and 0.3% hysteresis. Its logic array monitors IN1–IN4 simultaneously and asserts RESET on any UV fault or MR assertion, while OV activates on any OV condition.
It features a dual-phase watchdog timer: initial timeout of 102.4s (for µP initialization), then normal 1.6s timeout; WDO output requires WDI strobing to prevent assertion. All three outputs (RESET, OV, WDO) are active-low, open-drain, requiring external pullups and supporting 4mA sink capability at 0.4V max VOL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V - powers from highest of IN1–IN4 or VCC; ensures full functionality across standard DC-DC output rails. |
| UV/OV Threshold Accuracy | ±1.5% over -40°C to +85°C - guarantees reliable trip points for 5.0V/3.3V/2.5V/1.8V supply monitoring without calibration. |
| RESET Timeout Period | 180–220ms - provides sufficient hold time for system processor reset sequencing and power rail stabilization. |
| Watchdog Timeout | Initial: 102.4s; Normal: 1.6s - enables safe boot initialization followed by tight runtime supervision of microprocessor execution. |
| Output Drive Strength | VOL ≤ 0.4V @ 4mA - supports robust interfacing with 3.3V/5V logic families using standard pullup resistors. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and telecom infrastructure environments with no derating required. |
| Package | 16-pin thin QFN (5mm × 5mm × 0.8mm) with exposed pad - enables high-density PCB layout and efficient thermal dissipation in space-constrained systems. |
Pinout & Package
MAX6888IETE+ uses a 16-pin thin QFN package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; asserts when any monitored supply 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 toggled within timeout period; used to trigger system reset when connected to MR. |
| 3 | OV | Active-low open-drain overvoltage output; asserts when any supply exceeds OV threshold; holds low for 25µs after all OV conditions clear. |
| 4 | GND | System ground reference and return path for internal circuitry and exposed pad. |
| 5 | MR | Manual reset input; internally pulled up to BP (2.55V); 1µs minimum pulse width required to assert RESET; rejects 100ns glitches. |
| 6 | MARGIN | Margin disable input; when pulled low, freezes RESET/OV/WDO state during system-level stress testing; overrides MR if both asserted. |
| 7 | WDI | Watchdog input; internally pulldown-biased; requires low-to-high or high-to-low transition within timeout to prevent WDO assertion. |
| 8 | I.C. | Internal connection - no external connection required; leave unconnected. |
| 9 | VCC | Internal power-supply node; powered from highest of IN1–IN4; bypass to GND with 1µF ceramic capacitor; not for external power delivery. |
| 10 | BP | Bypass voltage output (2.55V nominal); powers internal logic; bypass to GND with 1µF ceramic capacitor; not for external loads. |
| 11–12 | N.C. | No connection - not internally bonded; leave unconnected. |
| 13 | IN4 | Fourth voltage detector input; monitors 1.8V supply (UV = 1.580V, OV = 2.020V); supports adjustable thresholds via external divider if configured as "Adj". |
| 14 | IN3 | Third voltage detector input; monitors 2.5V supply (UV = 2.190V, OV = 2.810V); includes 130–300kΩ input impedance and <±150nA leakage. |
| 15 | IN2 | Second voltage detector input; monitors 3.3V supply (UV = 2.880V, OV = 3.700V); supports noise immunity via 0.1µF local bypass to GND. |
| 16 | IN1 | First voltage detector input; monitors 5.0V supply (UV = 4.380V, OV = 5.620V); powers device when selected as highest valid input (≥2.7V). |
Key Features
| Feature | Design Value |
|---|---|
| Quad factory-set voltage detectors | Monitors 5.0V/3.3V/2.5V/1.8V rails simultaneously with dedicated UV/OV thresholds - eliminates need for discrete comparators and external resistive dividers. |
| Dual-mode watchdog timer | 102.4s initial timeout allows safe µP boot initialization; 1.6s normal timeout enforces runtime software health checks - reduces risk of silent hangs in embedded systems. |
| 10% threshold tolerance variant | MAX6888IETE+ offers ±10% UV/OV accuracy (vs. ±5% in A–H variants), enabling cost-optimized designs where tighter regulation is not required. |
| Margin disable function | MARGIN input holds RESET/OV/WDO outputs in current state during supply margining tests - simplifies validation of system behavior under out-of-spec voltage conditions. |
| Open-drain outputs with 4mA sink | RESET/OV/WDO support flexible voltage-level translation and wired-OR configurations; compatible with 1.8V–5V host logic using appropriate pullup resistors. |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
Use Scenario: Monitors 12V, 5V, 3.3V, and 1.8V rails in dual-CPU server motherboards during cold start and dynamic load transients. IC Role / Device Role / Timing Role: Supervisory IC providing coordinated RESET assertion, OV fault signaling, and watchdog supervision for x86/ARM processors and PMBus-controlled DC-DCs. Use Value: Prevents firmware corruption and hardware damage by asserting RESET within 200ms of any rail dropping below 1.58V (1.8V rail) or exceeding 2.02V. | Use Scenario: Embedded in carrier-grade Ethernet line cards to supervise primary and backup power supplies feeding FPGA, PHY, and SerDes ICs. IC Role / Device Role / Timing Role: Quad-supply monitor with independent OV/UV detection per rail and MARGIN-enabled stress testing during field deployment. Use Value: Ensures continuous uptime by triggering immediate system reset upon detection of 3.3V rail overvoltage (>3.70V) or watchdog timeout due to firmware lockup. |
| Industrial Network Switch | Storage Controller Board |
Use Scenario: Used on managed Gigabit switch control boards to validate PoE injector, CPU core, I/O, and memory supply integrity. IC Role / Device Role / Timing Role: Centralized power supervisor generating RESET, OV, and WDO signals synchronized to multi-rail power-up timing. Use Value: Guarantees deterministic boot by holding RESET for ≥180ms until all rails stabilize, preventing race conditions between FPGA configuration and CPU initialization. | Use Scenario: Deployed on NVMe SSD controller boards to supervise 3.3V PCIe interface, 1.8V NAND I/O, 1.2V core, and 1.0V DDR supply rails. IC Role / Device Role / Timing Role: Quad-input supervisor with adjustable INx options (via external dividers) enabling reuse across multiple storage platform generations. Use Value: Enables rapid failure diagnosis via separate OV output - e.g., immediate alert on 1.8V I/O rail overvoltage (>2.02V) before NAND flash damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888EETE+ | Same 4-input architecture and 5% threshold tolerance; UV/OV thresholds: 3.3V/2.5V/1.8V/Adj (vs. 5.0V/3.3V/2.5V/1.8V in MAX6888IETE+) | Designed for systems with three fixed rails plus one adjustable rail; lacks native 5.0V monitoring capability | Select MAX6888EETE+ when fourth input must be user-configurable and 5.0V rail supervision is handled elsewhere. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no OV detection; no watchdog; SOT-23-6 package; 0.5% threshold accuracy | Targeted at cost-sensitive, single-rail applications; no multivoltage or safety-critical watchdog capability | Choose TPS3808G33DBVR only for simple 3.3V reset generation where quad monitoring and OV/fault isolation are unnecessary. |
Compared with MAX6888EETE+, the MAX6888IETE+ provides native 5.0V rail supervision critical for legacy server peripherals, while TPS3808G33DBVR trades multivoltage coverage and watchdog safety for lower cost and smaller footprint in single-rail designs.
Availability
MAX6888IETE+ is available at Aetrix Electronics and suitable for telecom infrastructure, enterprise server, and industrial network switch applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6888IETE+ 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 solutions with integrated watchdog timers and configurable thresholds - engineered specifically for high-reliability power monitoring in servers, telecom equipment, and storage systems.
FAQ
What are the factory-set undervoltage thresholds for MAX6888IETE+?
The MAX6888IETE+ has factory-set undervoltage thresholds of 4.380V (IN1), 2.880V (IN2), 2.190V (IN3), and 1.580V (IN4), corresponding to nominal 5.0V, 3.3V, 2.5V, and 1.8V supply rails, with ±10% tolerance per the I-suffix variant designation in the Selector Guide.
Does MAX6888IETE+ support overvoltage detection, and what are its OV thresholds?
Yes, MAX6888IETE+ provides overvoltage detection on all four inputs with thresholds of 5.620V (IN1), 3.700V (IN2), 2.810V (IN3), and 2.020V (IN4). These OV thresholds are factory-set and match the same 10% tolerance as the undervoltage thresholds.
How does the watchdog timer in MAX6888IETE+ operate during system startup?
The MAX6888IETE+ watchdog timer begins with an initial timeout period of 102.4s after power-up or reset, allowing ample time for microprocessor initialization. After the first WDI toggle, it switches to the normal 1.6s timeout period for ongoing runtime supervision.
Can MAX6888IETE+ be powered from a dedicated VCC supply instead of monitored rails?
Yes, MAX6888IETE+ can be powered from an external VCC supply, but VCC must be ≥200mV higher than any monitored INx voltage and brought up first. Alternatively, it auto-selects power from the highest valid IN1–IN4 rail (≥2.7V), eliminating need for separate bias supply.
What is the purpose of the MARGIN input on MAX6888IETE+ and how is it used?
The MARGIN input on MAX6888IETE+ holds RESET, OV, and WDO outputs in their current asserted or deasserted state during system-level voltage margining tests. When pulled low, it overrides MR and freezes output states, enabling safe evaluation of system behavior under out-of-spec supply conditions.
MAX6888IETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 1.8V, 2.5V, 3.3V, 5V
- 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)
MAX6888IETE+ FAQ
1.How can I place an order for MAX6888IETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888IETE+ 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 MAX6888IETE+ reliable?
The price and inventory of MAX6888IETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888IETE+ is usually 5 days.
3.What payment methods are accepted for MAX6888IETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888IETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888IETE+?
MAX6888IETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888IETE+ 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 MAX6888IETE+?
For technical support, including MAX6888IETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888IETE+ requirements.
6.How does Aetrix verify that MAX6888IETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6888IETE+ 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 MAX6888IETE+ meets industry standards.
7.What is the process for return or replacement of MAX6888IETE+?
All MAX6888IETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888IETE+, 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 MAX6888IETE+ part is unused and in its original packaging.
Return procedure for MAX6888IETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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