My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6888FETE+
- Part No.:
- MAX6888FETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888FETE+.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:485
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6888FETE+ from Maxim Integrated is a quad-voltage, overvoltage/undervoltage supervisory IC with factory-set thresholds (IN1=3.06V UV / 3.54V OV, IN2=2.31V UV / 2.68V OV, IN3=1.39V UV / 1.61V OV, IN4=0.557V UV / 0.643V OV), 1% threshold accuracy, and active-low open-drain RESET/OV/WDO outputs. It monitors power rails in multivoltage server systems and asserts RESET on any undervoltage event or manual reset.
For engineers reviewing the MAX6888FETE+ datasheet, MAX6888FETE+ pinout, MAX6888FETE+ application, or MAX6888FETE+ equivalent, key selection criteria include its 4-input supervision capability, 200ms RESET timeout, 1.6s normal watchdog period, and compatibility with 3.3V/2.5V/1.5V/adjacent rail monitoring in telecom and storage platforms.
Technical Context
The MAX6888FETE+ implements independent voltage detectors per input with dual UV/OV comparators, each featuring 0.3% hysteresis and ±1.5% threshold accuracy over −40°C to +85°C. Its virtual diode-OR power architecture selects the highest of IN1–IN4 (≥2.7V) to supply internal circuitry, eliminating need for external VCC biasing in most configurations.
It integrates a two-phase watchdog timer (102.4s initial, 1.6s normal timeout) with WDI edge-sensitive strobing and WDO output that can be connected to MR to auto-generate resets. All three outputs-RESET, OV, WDO-are open-drain, requiring external pullups and supporting mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supervision Inputs | 4 dedicated voltage-monitor inputs (IN1–IN4), each with factory-set UV and OV thresholds |
| Threshold Accuracy | ±1% at +25°C; ±1.5% over full −40°C to +85°C range - ensures reliable trip points across temperature |
| RESET Timeout | 180–220ms - guarantees sufficient hold time for microprocessor initialization after power stabilization |
| Watchdog Timeout | 102.4s (initial), 1.6s (normal) - accommodates boot sequence then enforces runtime software health checks |
| Supply Range | 2.7V to 5.8V on any IN1–IN4 - supports direct monitoring of 3.3V, 2.5V, 1.5V, and adjustable rails without auxiliary supply |
| Output Type | Three active-low open-drain outputs (RESET, OV, WDO) - enables wired-OR logic and level-shifting across voltage domains |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade server, telecom, and networking equipment environments |
Pinout & Package
MAX6888FETE+ uses 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 in compact server modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low for ≥200ms when any monitored voltage falls below UV threshold or MR is pulled low; requires external pullup |
| 2 - WDO | Active-low open-drain watchdog output | Asserts low if WDI fails to toggle within 1.6s (normal mode); connects to MR to trigger automatic system reset |
| 3 - OV | Active-low open-drain overvoltage output | Asserts low when any input exceeds its OV threshold; remains low for 25µs after all OV conditions clear |
| 4 - GND | Ground reference | Primary return path for analog/digital circuitry; EP pad must be soldered to GND plane for thermal and noise performance |
| 5 - MR | Manual reset input | Pull low ≥1µs to assert RESET; internally pulled up to BP via 10µA current source; rejects ≤100ns glitches |
| 6 - MARGIN | Margin disable control | Pull low to freeze RESET/OV/WDO states during system-level stress testing; overrides MR when both asserted |
| 7 - WDI | Watchdog timer input | Edge-triggered (low-to-high or high-to-low); internal 10µA pulldown; must toggle within timeout to prevent WDO assertion |
| 8 - I.C. | Internal connection | No external connection required; leave unconnected |
| 9 - VCC | Internal power-supply node | Internally derived from highest IN1–IN4 voltage; bypass with 1µF ceramic capacitor; not for external powering |
| 10 - BP | Bypass voltage reference | +2.55V internal LDO output for logic; bypass with 1µF ceramic capacitor; not for external load driving |
| 11,12 - N.C. | No connection | Not internally bonded; leave unconnected (MAX6888 has only 4 inputs vs. MAX6887's 6) |
| 13 - IN4 | Voltage detector input 4 | Monitors 0.557V UV / 0.643V OV; supports adjustable threshold via external resistor divider; bypass with 0.1µF cap |
| 14 - IN3 | Voltage detector input 3 | Monitors 1.39V UV / 1.61V OV; factory-set for 1.5V rail supervision; same bypass and noise immunity requirements |
| 15 - IN2 | Voltage detector input 2 | Monitors 2.31V UV / 2.68V OV; optimized for 2.5V domain; supports high-impedance sensing (200kΩ typical input impedance) |
| 16 - IN1 | Voltage detector input 1 | Monitors 3.06V UV / 3.54V OV; configured for 3.3V rail; highest priority power source in diode-OR selection |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV detection | Four factory-configured thresholds eliminate need for external resistive dividers in standard 3.3V/2.5V/1.5V/adjacent rail monitoring |
| 1% threshold accuracy | Reduces false resets in margin-critical applications like enterprise SSD controllers and baseband processors |
| 200ms programmable RESET timeout | Ensures stable power delivery before releasing processor reset, compatible with x86 and ARM boot timing requirements |
| Two-phase watchdog timer | 102.4s initial timeout allows full BIOS/post execution; 1.6s normal timeout enforces real-time firmware liveness checks |
| Open-drain outputs with 4mA sink capability | Supports direct interface to 1.8V–5V logic families and enables shared-bus reset signaling in multi-processor systems |
| Integrated BP LDO (+2.55V) | Provides clean, regulated supply for internal logic - removes dependency on noisy system rails and improves noise immunity |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
|
Use Scenario: Monitors 3.3V, 2.5V, 1.5V, and adjustable auxiliary rails in dual-CPU rack servers during cold start and brownout events. IC Role / Device Role / Timing Role: Supervisory IC providing coordinated RESET assertion, OV fault signaling, and watchdog enforcement across multiple voltage domains. Use Value: Prevents CPU lockup by asserting RESET within 20µs of undervoltage detection and holding it for 200ms to ensure clean boot. |
Use Scenario: Embedded in carrier-grade Ethernet switches to supervise PoE controller rails, PHY supplies, and FPGA configuration voltages. IC Role / Device Role / Timing Role: Quad-input supervisor delivering independent UV/OV status per rail and enabling remote fault logging via OV output pulse. Use Value: Detects overvoltage on 12V PoE injectors before damage occurs, with 25µs OV timeout ensuring fast response without false triggering. |
| Enterprise Storage Controller | Industrial Network Appliance |
|
Use Scenario: Used in NVMe SSD controllers to monitor VDDQ (1.35V), VPP (3.3V), core (1.1V adj), and backup battery rails. IC Role / Device Role / Timing Role: Fault manager generating hardware reset on rail collapse and feeding watchdog signal to ARM Cortex-R5 safety monitor. Use Value: Guarantees data integrity by forcing controlled shutdown when 1.5V rail drops below 1.39V UV threshold, preventing write corruption. |
Use Scenario: Deployed in DIN-rail mounted industrial routers to supervise 24V DC input, 5V system, 3.3V I/O, and isolated 1.8V SerDes supplies. IC Role / Device Role / Timing Role: Multirail supervisor with MARGIN input enabling safe in-field voltage margining tests without disrupting system operation. Use Value: Allows engineers to validate 10% overvoltage tolerance on 3.3V rail while holding RESET asserted - critical for SIL2/IEC 61508 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6887FETE+ | Hex-input version (6 detectors) with identical IN1–IN4 thresholds; adds IN5/IN6 pins (N.C. on MAX6888) | Required where 6-rail monitoring is needed (e.g., high-end motherboards); occupies same 16-pin QFN footprint | Select MAX6887FETE+ only if sixth and seventh rail supervision is required; otherwise MAX6888FETE+ reduces BOM count and layout complexity |
| TPS3808G33DBVR | Single-channel 3.3V supervisor with 200ms reset delay; no OV detection, no watchdog, no multi-rail support | Suitable only for simple single-rail reset generation; lacks quad monitoring, overvoltage response, and watchdog functionality | Choose TPS3808G33DBVR only for cost-sensitive, single-rail applications where UV-only reset suffices and system-level watchdog is handled elsewhere |
Compared with MAX6887FETE+, the MAX6888FETE+ reduces pin count and simplifies routing by omitting unused IN5/IN6 terminals while retaining identical 4-rail thresholds and timing behavior; versus TPS3808G33DBVR, it delivers integrated quad-rail supervision, OV fault signaling, and hardware watchdog - eliminating need for three discrete supervisors and external logic.
Availability
MAX6888FETE+ is available at Aetrix Electronics and suitable for server power sequencing, telecom line card monitoring, and enterprise storage controller designs requiring stable component supply, RoHS-compliant packaging, and extended temperature operation.
Supply support for MAX6888FETE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX6887/MAX6888 product line was designed specifically for multivoltage system supervision in space-constrained, high-reliability platforms such as servers, storage arrays, and telecom infrastructure - integrating UV/OV detection, watchdog, and reset functions into a single 16-pin QFN.
FAQ
What are the factory-set voltage thresholds for MAX6888FETE+?
The MAX6888FETE+ features four factory-set thresholds: IN1 = 3.06V UV / 3.54V OV, IN2 = 2.31V UV / 2.68V OV, IN3 = 1.39V UV / 1.61V OV, and IN4 = 0.557V UV / 0.643V OV. These correspond to nominal 3.3V, 2.5V, 1.5V, and adjustable rails per the Selector Guide. Threshold accuracy is ±1% at +25°C and ±1.5% over −40°C to +85°C.
Can MAX6888FETE+ be powered solely from IN1–IN4 without an external VCC connection?
Yes - the MAX6888FETE+ uses a virtual diode-OR architecture to autonomously select the highest valid voltage among IN1–IN4 (≥2.7V) as its internal supply. No external VCC connection is required unless all inputs are configured as "Adj" (adjustable), in which case VCC must be externally supplied at least 200mV above the highest INx voltage.
How does the watchdog timer function in MAX6888FETE+ and what are its timeout periods?
The MAX6888FETE+ watchdog timer has two distinct phases: an initial timeout of 102.4s (for processor boot) and a normal timeout of 1.6s (for runtime monitoring). WDI must be toggled edge-to-edge within the active timeout period; failure causes WDO to assert low. WDO can be connected to MR to automatically generate a hardware reset.
What is the purpose of the MARGIN input on MAX6888FETE+ and how does it interact with MR?
The MARGIN input on MAX6888FETE+ holds RESET, OV, and WDO in their current state during system-level voltage margining tests. When pulled low, it overrides MR and prevents new assertions - allowing engineers to safely stress-test rails beyond normal operating ranges without triggering unintended resets or faults.
Does MAX6888FETE+ support overvoltage detection on all four inputs, and what is the OV timeout duration?
Yes - MAX6888FETE+ provides independent overvoltage detection on all four inputs (IN1–IN4) using the same factory-set OV thresholds as its UV detection. The OV output remains asserted for a fixed 25µs after all monitored voltages fall back below their respective OV thresholds, ensuring reliable fault capture without excessive latch-up duration.
MAX6888FETE+ 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:
- 1.5V, 2.5V, 3.3V, 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)
MAX6888FETE+ FAQ
1.How can I place an order for MAX6888FETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888FETE+ 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 MAX6888FETE+ reliable?
The price and inventory of MAX6888FETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888FETE+ is usually 5 days.
3.What payment methods are accepted for MAX6888FETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888FETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888FETE+?
MAX6888FETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888FETE+ 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 MAX6888FETE+?
For technical support, including MAX6888FETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888FETE+ requirements.
6.How does Aetrix verify that MAX6888FETE+ is sourced from the original manufacturer or authorized distributors?
All MAX6888FETE+ 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 MAX6888FETE+ meets industry standards.
7.What is the process for return or replacement of MAX6888FETE+?
All MAX6888FETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888FETE+, 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 MAX6888FETE+ part is unused and in its original packaging.
Return procedure for MAX6888FETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6888FETE+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
