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Analog Devices Inc./Maxim Integrated MAX6888EETE+T
- Part No.:
- MAX6888EETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX6888EETE+T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
MAX6888EETE+T from Maxim Integrated is a quad-voltage, overvoltage/undervoltage supervisory IC with watchdog timer, active-low open-drain RESET/OV/WDO outputs, and 1% threshold accuracy. It monitors four supply rails (3.3V, 2.5V, 1.8V, adjustable), asserts RESET on any undervoltage or manual reset, and supports telecom and server power sequencing in multivoltage systems.
For engineers reviewing the MAX6888EETE+T datasheet, MAX6888EETE+T pinout, MAX6888EETE+T application, or MAX6888EETE+T equivalent, key selection criteria include factory-set dual-threshold detection per input, 200ms RESET timeout, 102.4s/1.6s watchdog timeout modes, 16-pin thin QFN package, and -40°C to +85°C operation.
Technical Context
The MAX6888EETE+T implements independent voltage detectors for IN1–IN4, each with factory-trimmed undervoltage (UV) and overvoltage (OV) thresholds - specifically 3.060V UV / 3.540V OV on IN1, 2.310V UV / 2.680V OV on IN2, 1.670V UV / 1.930V OV on IN3, and adjustable UV/OV on IN4. Threshold hysteresis is 0.3% and tempco is 10 ppm/°C.
Its watchdog logic features an initial timeout of 102.4s followed by normal 1.6s intervals; WDI strobing resets the timer, and WDO assertion drives MR to generate system resets. All three outputs (RESET, OV, WDO) are active-low, open-drain, with 0.4V VOL at 4mA sink current and <1µA leakage in high-impedance state.
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 industrial multirail supplies. |
| UV/OV Threshold Accuracy | ±1% - guarantees precise fault detection without calibration; critical for reliable power sequencing in servers. |
| RESET Timeout Period | 180–220ms - provides stable reset hold time after fault clearance, meeting µP power-on reset requirements. |
| Watchdog Timeout | Initial: 102.4s, Normal: 1.6s - enables safe boot initialization followed by tight runtime supervision of microprocessor execution. |
| Operating Temperature | -40°C to +85°C - qualified for extended industrial environments including telecom base stations and storage controllers. |
| Package | 16-pin thin QFN (5mm × 5mm × 0.8mm, exposed pad) - compact footprint with thermal enhancement for dense PCB layouts. |
| Output Type | Active-low open-drain (RESET, OV, WDO) - allows wired-OR configuration and flexible pullup voltage selection (e.g., 1.8V/3.3V/5V domains). |
Pinout & Package
MAX6888EETE+T uses a 16-pin thin QFN package with exposed thermal pad (EP) connected to GND. Pin numbering follows standard top-view layout; EP must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts when any monitored voltage falls below UV threshold or MR is pulled low; remains low ≥180ms after fault clears. |
| 2: WDO | Active-low open-drain watchdog output | Asserts if WDI is not toggled within watchdog timeout; used to drive MR for automatic system recovery. |
| 3: OV | Active-low open-drain overvoltage output | Asserts when any input exceeds OV threshold; stays low 25µs after all OV conditions clear. |
| 4: GND | Ground reference | Primary return path for internal circuitry and external bypass capacitors (BP, VCC, INx). |
| 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 input | Pull low to freeze RESET/OV/WDO states during system-level margin testing; overrides MR if both asserted. |
| 7: WDI | Watchdog timer input | Requires low-to-high or high-to-low transition within timeout period; internally pulldown via 10µA current sink. |
| 8: I.C. | Internal connection | No external connection required; leave unconnected. |
| 9: VCC | Internal power-supply voltage | Internally derived from highest IN1–IN4; bypass to GND with 1µF ceramic capacitor; do not power external circuits from VCC. |
| 10: BP | Bypass voltage output | +2.55V internal LDO output powering logic; bypass to GND with 1µF ceramic capacitor; not for external loads. |
| 11,12: N.C. | No connection | Not internally connected; no bond wire; leave unconnected. |
| 13: IN4 | Adjustable voltage detector input | Monitors user-defined supply via external resistor divider; supports inputs >0.6V; factory-configured as "Adj" for MAX6888EETE+T. |
| 14: IN3 | Voltage detector input | Factory-set to monitor 1.670V UV / 1.930V OV; bypass to GND with 0.1µF capacitor for noise immunity. |
| 15: IN2 | Voltage detector input | Factory-set to monitor 2.310V UV / 2.680V OV; supports rail monitoring in DDR memory and core logic supplies. |
| 16: IN1 | Voltage detector input | Factory-set to monitor 3.060V UV / 3.540V OV; primary input for 3.3V system rails in networking equipment. |
| EP | Exposed thermal pad | Internally connected to GND; must be soldered to PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Quad voltage detection with dual thresholds | Four dedicated inputs (IN1–IN4), each with independent factory-set UV and OV trip points - eliminates need for external comparators in multirail systems. |
| 1% threshold accuracy over temperature | Guaranteed ±1% UV/OV tolerance from -40°C to +85°C - ensures consistent fault detection without recalibration across operating range. |
| Configurable watchdog timer | Two-stage timeout (102.4s initial + 1.6s normal) enables safe processor boot and robust runtime supervision without firmware modification. |
| Margin disable function | MARGIN input holds RESET/OV/WDO in current state during supply margining tests - simplifies validation of system behavior under out-of-spec conditions. |
| Low-component-count implementation | Requires only three external 1µF bypass caps (VCC, BP, EP) and optional 0.1µF per INx - reduces BOM count and board area vs discrete solutions. |
Applications
| Telecom Power Management | Server Board Monitoring |
|---|---|
|
Use Scenario: Monitoring 3.3V, 2.5V, 1.8V, and adjustable bias rails in LTE base station power modules. IC Role / Device Role / Timing Role: Supervisory IC providing coordinated UV/OV fault detection and watchdog-triggered reset for FPGA and DSP subsystems. Use Value: Prevents silent data corruption by asserting RESET within 20µs of undervoltage detection and holding it ≥180ms for clean reinitialization. |
Use Scenario: Validating power integrity across CPU core, memory, I/O, and auxiliary rails in dual-socket server motherboards. IC Role / Device Role / Timing Role: Centralized supply supervisor with margining support for production burn-in and field reliability testing. Use Value: Enables automated margin testing via MARGIN pin while preserving real-time fault response on other inputs - no test mode firmware required. |
| Networking Switch Control | Industrial Embedded Controller |
|
Use Scenario: Ensuring clean power-up sequencing and runtime supervision of 12V, 5V, 3.3V, and 1.8V rails in managed Ethernet switches. IC Role / Device Role / Timing Role: Quad-input supervisor generating synchronized RESET and OV signals to ARM-based management MCU and PHYs. Use Value: Dual-threshold detection prevents false resets during transient load steps while catching sustained overvoltage events before damage occurs. |
Use Scenario: Monitoring isolated DC-DC outputs (24V, 5V, 3.3V, 1.8V) in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Fault-tolerant supervisory IC with watchdog integration for safety-critical embedded control loops. Use Value: 102.4s initial watchdog window accommodates cold-start firmware loading; 1.6s runtime interval detects lockups within 2ms of stall onset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6887EETE+T | Hex-input version with identical IN1–IN4 thresholds but adds IN5/IN6; same 1% accuracy, 200ms RESET timeout, and watchdog timing. | Required where six-rail monitoring is needed (e.g., high-end workstations); occupies same 16-pin QFN footprint but uses pins 11–12 for IN5/IN6. | Select MAX6887EETE+T only if sixth and seventh voltage rails require supervision; otherwise MAX6888EETE+T minimizes unused pins and routing complexity. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only), no OV detection, no watchdog, 200ms reset timeout, SOT-23-6 package. | Suitable for simple single-rail reset generation; lacks multivoltage, overvoltage, and watchdog capabilities of MAX6888EETE+T. | Choose TPS3808G33DBVR only for cost-sensitive, space-constrained designs requiring basic 3.3V reset - not a functional substitute for quad-rail, dual-threshold, watchdog-enabled supervision. |
Compared with MAX6887EETE+T, the MAX6888EETE+T reduces pin count and layout overhead for four-rail systems while retaining identical accuracy and timing; versus TPS3808G33DBVR, it delivers comprehensive multivoltage supervision with overvoltage protection and watchdog functionality unavailable in single-rail alternatives.
Availability
MAX6888EETE+T is available at Aetrix Electronics and suitable for telecom infrastructure, server board design, and industrial embedded controller applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6888EETE+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, connectivity, and security applications.
The MAX6887/MAX6888 family targets multivoltage system supervision in telecom, networking, and enterprise computing - delivering integrated UV/OV detection, watchdog, and reset generation in minimal footprint.
FAQ
What are the factory-set voltage thresholds for MAX6888EETE+T?
The MAX6888EETE+T has factory-set thresholds of 3.060V UV / 3.540V OV on IN1, 2.310V UV / 2.680V OV on IN2, 1.670V UV / 1.930V OV on IN3, and an adjustable input on IN4. These values are specified in Table 2 of the datasheet and confirmed across -40°C to +85°C with ±1% accuracy. The MAX6888EETE+T does not support IN5 or IN6.
How does the watchdog timer operate in MAX6888EETE+T?
The MAX6888EETE+T watchdog features two timeout periods: an initial 102.4s window after power-up or reset, followed by 1.6s normal intervals. WDI must be toggled within each period; failure causes WDO to assert. When WDO is connected to MR, it triggers RESET for system recovery. The MAX6888EETE+T implements this entirely in hardware with no firmware dependency.
Can MAX6888EETE+T monitor voltages higher than 5.8V?
No. The absolute maximum rating for IN1–IN4 and VCC is +6V, and the guaranteed operating range is 2.7V to 5.8V. Voltages above 5.8V risk permanent damage. For higher-voltage rails, external resistor dividers must scale the input to fall within the MAX6888EETE+T's valid range - e.g., using the adjustable IN4 with appropriate R1/R2 values per the datasheet equation.
What is the purpose of the MARGIN pin on MAX6888EETE+T?
The MARGIN pin on MAX6888EETE+T freezes the states of RESET, OV, and WDO during system-level margin testing - allowing engineers to validate behavior under over/under-spec supply conditions without triggering spurious resets. When pulled low, it overrides MR and holds outputs steady until released. This function is fully implemented in the MAX6888EETE+T and requires no external components.
Is MAX6888EETE+T pin-compatible with other MAX6888 variants?
Yes. All MAX6888 variants (e.g., MAX6888AETE+T, MAX6888BETE+T, MAX6888EETE+T) share identical 16-pin thin QFN packaging, pinout, and electrical interface. Differences are limited to factory-programmed voltage thresholds on IN1–IN4; no PCB layout changes are needed when substituting between MAX6888 variants, including the MAX6888EETE+T.
MAX6888EETE+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:
- 1.8V, 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)
MAX6888EETE+T FAQ
1.How can I place an order for MAX6888EETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6888EETE+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 MAX6888EETE+T reliable?
The price and inventory of MAX6888EETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6888EETE+T is usually 5 days.
3.What payment methods are accepted for MAX6888EETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6888EETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6888EETE+T?
MAX6888EETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6888EETE+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 MAX6888EETE+T?
For technical support, including MAX6888EETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6888EETE+T requirements.
6.How does Aetrix verify that MAX6888EETE+T is sourced from the original manufacturer or authorized distributors?
All MAX6888EETE+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 MAX6888EETE+T meets industry standards.
7.What is the process for return or replacement of MAX6888EETE+T?
All MAX6888EETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6888EETE+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 MAX6888EETE+T part is unused and in its original packaging.
Return procedure for MAX6888EETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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