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Analog Devices Inc./Maxim Integrated MAX6893ETI
- Part No.:
- MAX6893ETI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX6893ETI.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
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Product details
Overview
The MAX6893ETI from Maxim Integrated is a pin-selectable, hex-input power-supply sequencer and supervisor IC that monitors six voltage inputs (IN1–IN6) and one watchdog input (WDI), asserting open-drain outputs (PG1–PG6, RESET, WDO) when thresholds are violated or timeout occurs. It features ±1% threshold accuracy, factory-set 6.25ms power-good deassertion delay, capacitor-adjustable reset (135–280ms) and watchdog (0.93–1.94s) timeouts, and operates across –40°C to +85°C for telecom and server power sequencing.
For engineers reviewing the MAX6893ETI datasheet, MAX6893ETI pinout, MAX6893ETI application, or MAX6893ETI equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in multimicroprocessor systems, and validated alternative options with documented functional differences - all grounded in Maxim's official specifications.
Technical Context
The MAX6893ETI implements a logic-array-based supervision architecture with five threshold selection inputs (TH0–TH4) enabling 32 factory-set voltage thresholds (e.g., 1.39V, 1.58V, 1.67V, 2.19V, 2.31V, 2.62V, 2.78V, 2.88V, 3.06V, 4.38V, 4.62V) and ±5% or ±10% tolerance selection. Its internal virtual diode-ORing power scheme allows operation from any of IN2–IN5 (2.7V–5.5V) or VCC, with VCC internally derived as the maximum of those inputs.
It integrates independent, capacitor-adjustable timing circuits for RESET (via SRT pin, ISRT = 230nA typ) and WDO (via SWT pin, ISWT = 230nA typ), each supporting factory-default or user-configured timeouts. All eight outputs (PG1–PG6, RESET, WDO) are open-drain with VOL ≤ 0.4V at 4mA sink, and PG outputs deassert after a fixed 6.25ms (typ) timeout following threshold recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Count | 6 monitored voltage inputs (IN1–IN6); 1 watchdog input (WDI) |
| Output Count | 6 open-drain power-good outputs (PG1–PG6), plus RESET and WDO - all active-low |
| Threshold Accuracy | ±1% over –40°C to +85°C - ensures precise undervoltage detection without calibration |
| PG Deassert Delay | 6.25ms (typ) fixed timeout after input recovery - guarantees stable power-up before enabling downstream circuitry |
| Reset Timeout Range | 180–220ms (default) or 135–280ms (capacitor-adjusted via SRT) - supports flexible system initialization timing |
| Watchdog Timeout Range | 1.44–1.76s (default) or 0.93–1.94s (capacitor-adjusted via SWT) - enables reliable firmware health monitoring |
| Supply Voltage Range | 2.7V to 5.5V on IN2–IN5 or VCC - compatible with common logic and core supply rails |
Pinout & Package
The MAX6893ETI is housed in a 5mm × 5mm × 0.8mm, 28-pin Thin QFN-EP package with exposed pad internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PG1–PG6 | Open-drain power-good outputs | Assert low when corresponding IN1–IN6 falls below selected threshold; deassert after 6.25ms timeout |
| RESET | Open-drain active-low reset output | Asserts if any monitored input fails or MR is pulled low; remains asserted for reset timeout period |
| WDO | Open-drain active-low watchdog output | Asserts if WDI lacks valid edge within timeout; clears on RESET assertion or WDI transition |
| TH0–TH4 | Threshold selection logic inputs | Binary-coded inputs selecting one of 32 factory thresholds and ±5%/±10% tolerance |
| SRT / SWT | Capacitor-adjustable timeout inputs | SRT sets reset timeout (tRP = 4.348M × CSRT); SWT sets watchdog timeout (tWD = 4.348M × CSWT) |
| MR / MARGIN / ENABLE | Control inputs | MR forces RESET assertion; MARGIN freezes all outputs; ENABLE forces all PG_ low |
| IN1–IN6 | Undervoltage detector inputs | Monitor supply rails; thresholds set by TH0–TH4 or external resistor divider (VTH = 0.6V) |
| VCC / DBP | Power supply pins | VCC powers analog core (derived from max of IN2–IN5); DBP supplies 2.55V digital logic/output stages |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold selection | 32 factory-set voltage thresholds (e.g., 1.39V–4.62V) with ±1% accuracy over temperature - eliminates external reference components |
| Flexible power sourcing | Operates from any IN2–IN5 supply (2.7V–5.5V) or VCC - simplifies multi-rail system integration without auxiliary bias |
| Configurable timing | Independent SRT and SWT pins enable capacitor-tuned reset and watchdog timeouts - replaces fixed-timer ICs and reduces BOM count |
| Robust output drive | Open-drain PG_, RESET, and WDO outputs support 4mA sink (VOL ≤ 0.4V) - directly interfaces with enable/shutdown pins of DC-DC regulators |
| System-level control | MR, MARGIN, and ENABLE inputs provide manual reset, output freeze, and forced power-good assertion - enables debug, margin testing, and safe sequencing |
Applications
| Telecom Power Sequencing | Server Board Management |
|---|---|
Use Scenario: Sequencing startup of multiple voltage rails (1.8V, 2.5V, 3.3V, 5V) in central office line cards to prevent latch-up and ensure clean boot. IC Role / Device Role / Timing Role: MAX6893ETI acts as primary sequencer/supervisor, using TH0–TH4 to configure per-rail thresholds and PG outputs to enable DC-DC converters in order. Use Value: Factory-set 6.25ms PG deassertion delay prevents premature enablement; ±1% threshold accuracy avoids false trips during rail ramp-up. |
Use Scenario: Monitoring CPU core, memory, and I/O voltages in dual-socket servers, triggering hardware reset on any rail failure. IC Role / Device Role / Timing Role: MAX6893ETI serves as centralized supervisor, asserting RESET if IN1–IN6 drop below configured levels or WDI stalls - interfacing with BMC via open-drain outputs. Use Value: Independent SRT/CSRT tuning allows matching reset timing to BIOS POST requirements; WDO provides fail-safe firmware watchdog coverage. |
| Multimicroprocessor Systems | Base Station RF Subsystem |
Use Scenario: Coordinating power-up of FPGA, DSP, and ADC in high-speed data acquisition systems where sequencing order and timing margins are critical. IC Role / Device Role / Timing Role: MAX6893ETI configures six PG outputs to control enable signals of individual power modules, with ENABLE pin used for global hold-off during configuration. Use Value: Pin-selectable thresholds eliminate need for external resistive dividers on most rails; MARGIN input freezes outputs during voltage margin testing. |
Use Scenario: Supervising bias supplies (3.3V, 5V, 12V) and RF amplifier rails in 4G/5G base station remote radio units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: MAX6893ETI performs continuous undervoltage monitoring across –40°C to +85°C, asserting PG outputs to disable PA stages before thermal shutdown occurs. Use Value: ±1% threshold accuracy and <10ppm/°C tempco maintain trip points across temperature; DBP-regulated 2.55V output ensures stable logic interface under load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply sequencing and supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6892ETJ | 32-pin variant with 8 voltage inputs (IN1–IN8) and 10 outputs (PG1–PG8, RESET, WDO); identical TH0–TH4 logic, timing, and accuracy specs | Supports larger systems requiring >6 monitored rails; occupies larger footprint (5×5mm, 32-pin vs. 28-pin) | Select MAX6892ETJ only when 8-input supervision is required; MAX6893ETI saves board space and cost for 6-rail designs. |
| TPS386000RGPT | TI device with 6 adjustable voltage inputs, but uses external resistor dividers for all thresholds (no pin-select mode); fixed 200ms reset timeout; no watchdog function | Lacks integrated watchdog and capacitor-adjustable timing; requires more external components for threshold setting | Choose TPS386000RGPT only if pin-select simplicity is unnecessary and watchdog supervision is handled elsewhere in the system. |
Compared with MAX6892ETJ, the MAX6893ETI reduces pin count and PCB area while retaining identical supervision precision and flexibility for 6-rail systems; compared with TPS386000RGPT, it delivers integrated watchdog, programmable timeouts, and factory-set thresholds - reducing design effort and component count.
Availability
The MAX6893ETI is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, and base station RF subsystems requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for MAX6893ETI 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 demanding industrial, communications, and computing applications.
The MAX6893ETI belongs to Maxim's power-supply sequencer/supervisor product line, engineered specifically for reliable, multi-rail power management in high-availability systems such as servers, telecom equipment, and wireless infrastructure.
FAQ
What is the operating temperature range of the MAX6893ETI?
The MAX6893ETI is specified to operate over the extended industrial temperature range of –40°C to +85°C. This rating is guaranteed across all electrical parameters in the datasheet, including threshold accuracy (±1%), PG timeout (6.25ms typ), and reset/watchdog timing - making it suitable for deployment in uncontrolled environments like outdoor base stations and telecom central offices.
How many voltage inputs does the MAX6893ETI monitor?
The MAX6893ETI monitors six dedicated voltage inputs: IN1 through IN6. This is confirmed in the General Description ("MAX6893 features six voltage-detector inputs"), Pin Description table (pins 32, 28–25, 21), and Functional Diagram. Unlike the MAX6892 (8 inputs) or MAX6894 (4 inputs), the MAX6893ETI's 28-pin package maps exactly to these six inputs plus RESET, WDO, and control pins.
Can the MAX6893ETI be powered from its monitored supply inputs?
Yes, the MAX6893ETI can be powered directly from any of its IN2–IN5 inputs (2.7V–5.5V) without an external VCC supply. Its internal virtual diode-ORing circuit selects the highest valid voltage among IN2–IN5 to power the analog core. VCC is internally generated from that source and must not be used to power external circuitry - confirming self-powered operation in multi-rail systems.
What is the purpose of the TH0–TH4 pins on the MAX6893ETI?
The TH0–TH4 pins on the MAX6893ETI are binary-coded logic inputs that select one of 32 factory-set undervoltage thresholds (e.g., 1.39V, 2.19V, 3.06V) and determine whether the tolerance is ±5% (TH4 = 1) or ±10% (TH4 = 0). These pins are sampled only at power-up and define the trip points for all six monitored inputs (IN1–IN6), enabling configuration without software or external components.
Does the MAX6893ETI include a watchdog timer function?
Yes, the MAX6893ETI includes a fully integrated watchdog timer with dedicated WDI (watchdog input) and WDO (watchdog output) pins. It supports two timeout modes: a long initial timeout (≥92.16s after reset) and a short normal timeout (≥1.44s after first WDI edge), both selectable via SWT pin connection. The WDO output asserts low if WDI remains static beyond the timeout - providing hardware-level firmware health monitoring.
MAX6893ETI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 6
- Voltage - Threshold:
- 32 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (5x5)
MAX6893ETI FAQ
1.How can I place an order for MAX6893ETI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6893ETI 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 MAX6893ETI reliable?
The price and inventory of MAX6893ETI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6893ETI is usually 5 days.
3.What payment methods are accepted for MAX6893ETI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6893ETI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6893ETI?
MAX6893ETI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6893ETI 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 MAX6893ETI?
For technical support, including MAX6893ETI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6893ETI requirements.
6.How does Aetrix verify that MAX6893ETI is sourced from the original manufacturer or authorized distributors?
All MAX6893ETI 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 MAX6893ETI meets industry standards.
7.What is the process for return or replacement of MAX6893ETI?
All MAX6893ETI units undergo pre-shipment inspection (PSI). If there is an issue with MAX6893ETI, 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 MAX6893ETI part is unused and in its original packaging.
Return procedure for MAX6893ETI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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