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Analog Devices Inc./Maxim Integrated MAX6888JETE+
- Part No.:
- MAX6888JETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888JETE+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:644
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Product details
Overview
MAX6888JETE+ from Maxim Integrated is a quad-voltage, overvoltage/undervoltage supervisory IC with watchdog timer, active-low open-drain RESET/OV/WDO outputs, and factory-set thresholds for 5.0V, 2.88V, 2.19V, and adjustable IN4 (0.527V UV / 0.673V OV). It operates from -40°C to +85°C in multivoltage server and telecom power systems.
For engineers reviewing the MAX6888JETE+ datasheet, MAX6888JETE+ pinout, MAX6888JETE+ application, or MAX6888JETE+ equivalent, key selection factors include its 1% threshold accuracy, 200ms reset timeout, 102.4s initial / 1.6s normal watchdog periods, and 16-pin thin QFN package with exposed pad.
Technical Context
The MAX6888JETE+ integrates four independent voltage detectors-each with matched undervoltage and overvoltage thresholds-and a dual-mode watchdog timer with distinct initial (102.4s) and normal (1.6s) timeout periods. Its logic array monitors IN1–IN4 simultaneously and asserts RESET on any UV fault or MR assertion.
All three outputs (RESET, OV, WDO) are active-low, open-drain with 4mA sink capability and <0.4V VOL. Power is derived from the highest of IN1–IN4 (≥2.7V) or VCC, while BP provides a regulated +2.55V internal supply for logic and output drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.8V on IN1–IN4 or VCC - ensures operation across common system rails without external regulation |
| UV/OV Threshold Accuracy | ±1% at +25°C, ±1.5% over -40°C to +85°C - enables precise margining and fault detection in high-reliability systems |
| RESET Timeout Period | 180–220ms - guarantees sufficient hold time for processor initialization after power-up or fault recovery |
| Watchdog Timeout | Initial: 92.16–112.64s; Normal: 1.44–1.76s - supports safe boot sequence then tight runtime supervision |
| 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 compact, thermally efficient PCB layout |
Pinout & Package
MAX6888JETE+ uses a 16-pin thin QFN-EP package (5mm × 5mm, 0.8mm height) with exposed thermal pad connected to GND. The package is RoHS-compliant and optimized for thermal dissipation in high-density power management applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; held low ≥200ms after fault clearance - directly interfaces with µP reset input requiring external pullup |
| 2 | WDO | Active-low open-drain watchdog output; asserts when WDI fails to toggle within timeout - used to trigger MR or NMI for system recovery |
| 3 | OV | Active-low open-drain overvoltage output; stays low 25µs after all inputs return to spec - enables fast overvoltage shutdown via external logic |
| 4 | GND | Ground reference for analog/digital circuitry and thermal path for exposed pad - must be low-impedance plane for noise immunity |
| 5 | MR | Manual reset input; internally pulled up to BP (10µA); 1µs minimum pulse width - allows operator-initiated reset without external components |
| 6 | MARGIN | Margin disable input; overrides MR when asserted low - holds RESET/OV/WDO state during system-level stress testing |
| 7 | WDI | Watchdog timer input; internally pulldown (10µA); requires edge transition every timeout period - connects to µP GPIO or clock signal for software health monitoring |
| 8 | I.C. | Internal connection - no external connection required |
| 9 | VCC | Internal power-supply node; equals max(IN1–IN4); bypass with 1µF ceramic - not for powering external circuitry; critical for stable internal biasing |
| 10 | BP | Bypass voltage output (+2.55V nominal); powers internal logic and RESET driver; bypass with 1µF ceramic - dedicated low-noise supply rail for timing circuitry |
| 13–16 | IN4–IN1 | Quad voltage detector inputs; monitor UV/OV thresholds per Selector Guide - IN1=5.0V, IN2=2.88V, IN3=2.19V, IN4=adjustable (0.527V UV/0.673V OV) |
| 11–12 | N.C. | No connection - unused pins in MAX6888 variant (vs. MAX6887's IN5/IN6) |
| EP | Exposed Pad | Internally connected to GND - must be soldered to PCB ground plane for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Quad voltage monitoring with UV/OV detection | Simultaneous supervision of four independent rails (5.0V, 2.88V, 2.19V, adjustable) eliminates need for multiple discrete supervisors |
| Factory-set 1% threshold accuracy | Reduces calibration overhead and improves system-level voltage margining precision across temperature |
| Dual-mode watchdog timer | 102.4s initial timeout accommodates full µP boot; 1.6s normal timeout enforces runtime software liveness without false triggers |
| Active-low open-drain outputs with 4mA sink | Enables wired-OR configuration with other system reset sources and direct interface to standard µP reset inputs |
| Integrated BP regulator (+2.55V) | Provides clean, low-noise internal supply for timing circuitry - decouples supervisor operation from noisy system rails |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
Use Scenario: Supervising 12V, 5V, 3.3V, and 1.8V rails in a dual-CPU server motherboard during cold start and dynamic load transients. IC Role / Device Role / Timing Role: Quad-rail voltage supervisor with coordinated RESET assertion and 200ms timeout ensuring synchronized processor initialization. Use Value: Prevents partial boot failures by holding RESET until all rails stabilize within ±1% thresholds, improving system uptime. | Use Scenario: Monitoring DC-DC outputs (5V, 3.3V, 2.5V, adjustable bias) on a carrier-grade Ethernet line card exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade supervisory IC with -40°C to +85°C operation and 1.5% threshold drift over temperature. Use Value: Detects overvoltage faults within 25µs and asserts OV to shut down downstream converters before damage occurs. |
| Network Switch ASIC Power Management | Industrial Control PLC Power Integrity |
Use Scenario: Ensuring clean power-up of multi-core network switch ASICs requiring strict sequencing between core, I/O, and auxiliary rails. IC Role / Device Role / Timing Role: Supervisor with manual reset (MR) and margin disable (MARGIN) enabling in-system firmware updates and functional safety testing. Use Value: MARGIN input freezes RESET/OV/WDO states during voltage margining tests, allowing validation beyond nominal operating ranges. | Use Scenario: Protecting programmable logic controller (PLC) CPU and field I/O modules from brownout-induced erratic behavior in factory automation environments. IC Role / Device Role / Timing Role: Watchdog-enabled supervisor connecting WDO to MR to auto-recover from software hangs without operator intervention. Use Value: 1.6s normal watchdog timeout detects stalled firmware execution and initiates full system reset within guaranteed timing window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6888METE+ | Same quad-input architecture and 10% threshold tolerance, but configured for 3.3V/2.19V/1.58V/0.527V monitoring instead of 5.0V/2.88V/2.19V/0.527V | Targeted at lower-voltage systems (e.g., ARM-based controllers) rather than mixed 5V/3.3V/2.5V telecom infrastructure | Select MAX6888METE+ when primary rails are ≤3.3V and 5V supervision is unnecessary |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only), no overvoltage detection, no watchdog timer, SOT-23-6 package | Suitable for cost-sensitive, single-rail applications where quad monitoring and OV protection are not required | Choose TPS3808G33DBVR only for simple 3.3V reset generation - lacks MAX6888JETE+'s multirail, OV, and watchdog capabilities |
Compared with MAX6888METE+, MAX6888JETE+ supports higher primary rail supervision (5.0V vs. 3.3V), making it optimal for legacy telecom and server designs; versus TPS3808G33DBVR, it delivers comprehensive quad-rail, UV/OV, and watchdog functionality unattainable in a single-channel device.
Availability
MAX6888JETE+ is available at Aetrix Electronics and suitable for telecom infrastructure, enterprise server power management, and industrial control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX6888JETE+ 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 power management, sensing, and connectivity in demanding industrial and communications applications.
The MAX6887/MAX6888 product line delivers multivoltage supervisory solutions with integrated watchdog timers and high-accuracy thresholds specifically for telecom, server, and networking equipment requiring robust power integrity monitoring.
FAQ
What are the factory-set undervoltage thresholds for MAX6888JETE+?
The MAX6888JETE+ has factory-set undervoltage thresholds of 4.380V (IN1), 2.880V (IN2), 2.190V (IN3), and 0.527V (IN4), all with ±1.5% accuracy over -40°C to +85°C. These values correspond to nominal input voltages of 5.0V, 3.3V, 2.5V, and adjustable, respectively, as defined in Table 2 of the MAX6888 datasheet. The 0.527V IN4 threshold enables precise monitoring of low-voltage bias rails or adjustable supplies using external resistor dividers.
How does the watchdog timer function in MAX6888JETE+?
The MAX6888JETE+ watchdog timer features two distinct timeout modes: an initial timeout of 102.4s (92.16–112.64s) for µP boot sequences, followed by a normal timeout of 1.6s (1.44–1.76s) for runtime supervision. WDO asserts low if WDI fails to toggle within the active timeout period. When WDO is connected to MR, it triggers a RESET pulse (~5µs), which clears the watchdog and restarts the timer upon release - enabling autonomous recovery from software hangs without external intervention.
Can MAX6888JETE+ monitor overvoltage conditions, and what are the thresholds?
Yes, MAX6888JETE+ monitors overvoltage on all four inputs with factory-set thresholds of 5.620V (IN1), 3.700V (IN2), 2.810V (IN3), and 0.673V (IN4), each with ±1.5% accuracy over temperature. OV asserts low when any input exceeds its respective OV threshold and remains low for 25µs after all inputs return below threshold. This fast response enables immediate protection of downstream circuitry, such as disabling DC-DC converters via external logic tied to the OV output.
What is the purpose of the MARGIN input on MAX6888JETE+?
The MARGIN input on MAX6888JETE+ disables automatic RESET/OV/WDO assertion during system-level voltage margining tests. When pulled low, MARGIN holds all three outputs in their current state regardless of input voltage fluctuations or watchdog expiration - allowing engineers to validate system behavior under out-of-spec supply conditions without triggering unintended resets. It overrides MR if both are asserted, and is internally pulled up to BP via a 10µA current source when left unconnected.
Does MAX6888JETE+ require external passive components for basic operation?
Yes, MAX6888JETE+ requires three external components for reliable operation: a 1µF ceramic capacitor from VCC to GND, a 1µF ceramic capacitor from BP to GND, and pullup resistors on RESET, OV, and WDO (open-drain outputs). Additionally, 0.1µF bypass capacitors are recommended on each IN1–IN4 input for noise immunity. No external components are needed for MR or MARGIN, as both feature internal current-source biasing.
MAX6888JETE+ 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, 5V, 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)
MAX6888JETE+ FAQ
1.How can I place an order for MAX6888JETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888JETE+ 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 MAX6888JETE+ reliable?
The price and inventory of MAX6888JETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888JETE+ is usually 5 days.
3.What payment methods are accepted for MAX6888JETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888JETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888JETE+?
MAX6888JETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888JETE+ 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 MAX6888JETE+?
For technical support, including MAX6888JETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888JETE+ requirements.
6.How does Aetrix verify that MAX6888JETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6888JETE+ 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 MAX6888JETE+ meets industry standards.
7.What is the process for return or replacement of MAX6888JETE+?
All MAX6888JETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888JETE+, 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 MAX6888JETE+ part is unused and in its original packaging.
Return procedure for MAX6888JETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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