My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6888QETE+T
- Part No.:
- MAX6888QETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888QETE+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6888QETE+T from Maxim Integrated is a quad-voltage supervisory IC with factory-set adjustable thresholds, active-low open-drain RESET/OV/WDO outputs, and integrated watchdog timer. It monitors four supply rails for undervoltage (0.557V) and overvoltage (0.643V) conditions with ±1.5% threshold accuracy and operates across –40°C to +85°C in telecom power systems.
For engineers reviewing the MAX6888QETE+T datasheet, MAX6888QETE+T pinout, MAX6888QETE+T application, or MAX6888QETE+T equivalent, key selection criteria include its 4-input supervision capability, 200ms reset timeout, 1.6s normal watchdog period, and compatibility with multirail server/telecom power architectures requiring margining disable and manual reset control.
Technical Context
The MAX6888QETE+T implements independent voltage detectors on IN1–IN4, each with matched undervoltage and overvoltage comparators referenced to internal 0.6V基准, enabling user-defined thresholds via external resistor dividers. Its logic array drives three open-drain outputs-RESET (200ms timeout), OV (25µs timeout), and WDO-with propagation delays under 30µs.
Power is derived from the highest of IN1–IN4 or VCC, with internal virtual diode-ORing and hysteresis ensuring stable rail selection. The BP pin provides a regulated +2.55V internal supply for logic, bypassed by a 1µF capacitor; all inputs require 0.1µF local bypassing for noise immunity per Maxim's layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supervision Inputs | 4 independent voltage detectors (IN1–IN4), each with factory-set UV/OV thresholds at 0.557V/0.643V ±1.5% |
| Reset Timeout | 200ms minimum assertion time ensures reliable µP initialization after fault clearance |
| Watchdog Periods | Initial timeout = 102.4s; normal timeout = 1.6s - supports boot-time and runtime processor monitoring |
| Output Type | Three active-low open-drain outputs (RESET, OV, WDO) requiring external pullups for system-level logic interfacing |
| Supply Range | 2.7V to 5.8V on any IN1–IN4 or VCC - enables flexible powering from monitored rails |
| Operating Temp | –40°C to +85°C - qualified for industrial telecom and networking equipment environments |
Pinout & Package
Package: 16-pin thin QFN (5mm × 5mm × 0.8mm) with exposed pad (EP), RoHS-compliant, thermal performance optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low open-drain reset output | Asserts when any INx falls below UV threshold or MR is pulled low; holds low for ≥200ms after fault clearance |
| 2 (WDO) | Active-low open-drain watchdog output | Asserts if WDI lacks valid edge within 1.6s (normal mode); connects to MR to auto-generate resets on timeout |
| 3 (OV) | Active-low open-drain overvoltage output | Asserts when any INx exceeds OV threshold; remains low for ≥25µs after all inputs return to safe range |
| 4 (GND) | Ground reference | Primary return path for analog/digital circuitry; EP internally connected to GND for thermal and EMI performance |
| 5 (MR) | Manual reset input | Pull low to force RESET assertion; internally pulled up to BP (10µA); 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-sensitive (H→L or L→H); internal 10µA pulldown; must toggle within timeout to prevent WDO assertion |
| 8 (I.C.) | Internal connection | No external connection required; leave unconnected per datasheet |
| 9 (VCC) | Internal power-supply voltage | Internally generated from highest IN1–IN4; bypass with 1µF ceramic cap; not for external load driving |
| 10 (BP) | Bypass voltage for internal logic | +2.55V regulated supply; bypass with 1µF ceramic cap; powers RESET driver and logic core |
| 13–16 (IN4–IN1) | Adjustable voltage detector inputs | Each monitors UV/OV against 0.557V/0.643V thresholds; support external divider for custom rail monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Quad adjustable-threshold detection | Four independent INx inputs configurable via external resistors to monitor arbitrary supply voltages ≥0.6V |
| ±1.5% UV/OV threshold accuracy | Ensures precise fault detection across –40°C to +85°C, critical for stable operation in telecom base stations |
| 200ms reset timeout with hysteresis | Guarantees clean µP reset release after supply stabilization, preventing premature reboots during brownout recovery |
| Dual-mode watchdog timer | 102.4s initial timeout accommodates µP boot sequence; 1.6s normal timeout detects runtime lockups |
| MARGIN override function | Allows in-system validation of power supplies beyond nominal ranges while holding supervisory outputs static |
Applications
| Telecom Power Management | Server PSU Monitoring |
|---|---|
Use Scenario: Monitoring multiple DC-DC converter outputs (e.g., 12V, 5V, 3.3V, 1.8V) in LTE base station power shelves. IC Role / Device Role / Timing Role: Quad-voltage supervisor asserting RESET on any rail undervoltage to halt processor execution until all supplies stabilize. Use Value: Prevents corrupted memory writes or firmware crashes caused by marginal supply conditions during RF transmission bursts. | Use Scenario: Supervising redundant 12V/5V/3.3V/1.2V rails in enterprise rack servers with hot-swap capability. IC Role / Device Role / Timing Role: Simultaneous UV/OV detection on four rails with independent 200ms reset hold-off to coordinate graceful shutdown sequences. Use Value: Enables deterministic power sequencing and fault isolation without requiring additional discrete supervisors or FPGA logic. |
| Networking Switch Power | Industrial Control Unit |
Use Scenario: Validating PoE-powered switch ASIC supplies (3.3V, 2.5V, 1.8V, 1.2V) under dynamic load transients. IC Role / Device Role / Timing Role: Adjustable-threshold supervision using external dividers to match exact ASIC rail tolerances. Use Value: Eliminates need for custom-trimmed fixed-threshold parts, reducing BOM count and qualification effort. | Use Scenario: Monitoring isolated DC supplies in programmable logic controller (PLC) backplanes operating in harsh factory environments. IC Role / Device Role / Timing Role: MARGIN input used during burn-in testing to hold RESET while applying overvoltage stress to individual rails. Use Value: Enables accelerated life testing without triggering false resets, improving production test throughput and reliability validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6887QETE+T | Six-input version with identical UV/OV thresholds (0.557V/0.643V), same package and timing specs | Supports systems requiring supervision of six rails (e.g., high-end routers with auxiliary supplies) | Select when >4 monitored rails are needed; otherwise MAX6888QETE+T reduces pin count and layout complexity |
| TPS3808G33DBVR | Single-channel supervisor with 3.3V fixed UV threshold, no OV detection, no watchdog, SOT-23-6 package | Limited to single-rail monitoring; lacks quad supervision, OV alert, and watchdog functionality | Only suitable for simple 3.3V-only systems where cost and size outweigh feature requirements |
Compared with MAX6887QETE+T and TPS3808G33DBVR, the MAX6888QETE+T delivers optimal balance of quad-rail supervision, dual-threshold detection, and watchdog capability in a compact QFN - making it ideal for space-constrained multivoltage systems where full-feature integration matters more than minimal channel count or lowest unit cost.
Availability
MAX6888QETE+T is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and industrial networking applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX6888QETE+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 and mixed-signal ICs for power, sensing, and connectivity applications.
The MAX6887/MAX6888 family was engineered specifically for multivoltage system supervision in telecom, networking, and server platforms - emphasizing accurate threshold detection, robust noise immunity, and integrated watchdog functionality.
FAQ
What are the factory-set undervoltage and overvoltage thresholds for MAX6888QETE+T?
The MAX6888QETE+T has factory-set thresholds of 0.557V (undervoltage) and 0.643V (overvoltage) on all four inputs (IN1–IN4). These values are specified with ±1.5% accuracy over –40°C to +85°C and enable user-adjustable monitoring via external resistor dividers per the device's adjustable-threshold architecture.
How does the watchdog timer operate in MAX6888QETE+T?
The MAX6888QETE+T features a dual-mode watchdog timer: an initial timeout of 102.4s allows µP boot completion, followed by a normal timeout of 1.6s for runtime monitoring. WDO asserts if WDI fails to toggle within the active timeout period; connecting WDO to MR generates automatic resets, and the watchdog clears when RESET goes low.
Can MAX6888QETE+T be powered from a dedicated supply rail?
Yes - the MAX6888QETE+T can be powered either from any of IN1–IN4 (≥2.7V) or from an externally supplied VCC. Internal virtual diode-ORing selects the highest available voltage source. When all INx are configured as "Adj", VCC must be used and brought up first, at least 200mV above any INx voltage.
What is the purpose of the MARGIN input on MAX6888QETE+T?
The MARGIN input on MAX6888QETE+T holds RESET, OV, and WDO in their current state during system-level stress testing - for example, when validating power supply behavior beyond nominal ranges. Pulling MARGIN low freezes outputs regardless of input voltage changes or watchdog expiration, and it overrides MR when both are asserted.
Does MAX6888QETE+T require external pullup resistors on its outputs?
Yes - all three outputs (RESET, OV, WDO) are active-low open-drain and require external pullup resistors to the appropriate logic rail (e.g., 3.3V or 5V). This configuration enables wired-OR connectivity, level translation, and shared reset bus implementation across multiple subsystems in complex multivoltage designs.
MAX6888QETE+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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- 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)
MAX6888QETE+T FAQ
1.How can I place an order for MAX6888QETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888QETE+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 MAX6888QETE+T reliable?
The price and inventory of MAX6888QETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888QETE+T is usually 5 days.
3.What payment methods are accepted for MAX6888QETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888QETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888QETE+T?
MAX6888QETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888QETE+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 MAX6888QETE+T?
For technical support, including MAX6888QETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888QETE+T requirements.
6.How does Aetrix verify that MAX6888QETE+T is sourced from the original manufacturer or authorized distributors?
All MAX6888QETE+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 MAX6888QETE+T meets industry standards.
7.What is the process for return or replacement of MAX6888QETE+T?
All MAX6888QETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888QETE+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 MAX6888QETE+T part is unused and in its original packaging.
Return procedure for MAX6888QETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6888QETE+T 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…
