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Analog Devices Inc./Maxim Integrated MAX16042TP+T
- Part No.:
- MAX16042TP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX16042TP+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,014
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Product details
Overview
MAX16042TP+T from Maxim Integrated is a triple-voltage supervisor and sequencer in a 20-pin TQFN package, monitoring three independent supply rails (IN1–IN3) with logic-selectable thresholds (3.3V/2.5V/1.8V/1.5V/1.2V/fixed or adjustable down to 0.5V), ±1.5% adjustable threshold accuracy, and capacitor-adjustable timing for power-up sequencing in multivoltage systems such as server power supplies.
For engineers reviewing the MAX16042TP+T datasheet, MAX16042TP+T pinout, MAX16042TP+T application, or MAX16042TP+T equivalent, this device supports daisy-chained sequencing, independent enable-controlled outputs, push-pull RESET with fixed (140ms min) or capacitor-adjustable timeout, open-drain outputs rated to 28V, and operation from -40°C to +125°C - all critical for robust industrial and computing power management design.
Technical Context
The MAX16042TP+T implements three independent comparator-based voltage monitors, each with dedicated EN_, CDLY_, and OUT_ terminals, enabling per-rail enable/disable control and capacitor-set delay timing (via 250nA/1V threshold charge). Threshold selection uses TH1/TH0 logic inputs to configure nine combinations across fixed and adjustable modes.
It integrates a push-pull active-low RESET output that deasserts only after all three monitored voltages exceed their thresholds, with reset timeout set either internally (140ms min) or externally via CRESET capacitor (0.5V threshold, 500nA charge current); MR input provides manual reset with 500nA internal pullup and 2µs minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Monitored Voltages | Three independent rails (IN1–IN3), each with selectable threshold and delay |
| Threshold Accuracy | ±1.5% for adjustable mode (0.5V min), ±2.7% for fixed thresholds over -40°C to +125°C |
| Operating Voltage | VCC = 2.2V to 28V; UVLO at 1.9V typical ensures reliable startup and shutdown behavior |
| Output Type | Three open-drain OUTx (28V tolerant), one push-pull active-low RESET |
| Timing Control | Capacitor-adjustable delays (CDLY1–CDLY3, 250nA charge to 1V) and reset timeout (CRESET, 500nA to 0.5V) |
| Temperature Range | Full specification from -40°C to +125°C - qualified for automotive-grade and industrial embedded use |
| Package | 20-pin TQFN (4mm × 4mm, T2044-3), exposed pad connected to GND for thermal performance |
Pinout & Package
MAX16042TP+T is housed in a 20-pin, 4mm × 4mm thin quad flat no-lead (TQFN) package with exposed thermal pad (EP) tied to GND. Pin pitch is 0.5mm; recommended PCB land pattern is Maxim's 90-0070.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 | Physical pin numbers per top-view layout | Exact mapping defined in datasheet Figure "TOP VIEW MAX16042"; EP (exposed pad) is internal GND connection |
| VCC (Pin 9) | Supply input | 2.2V–28V main power rail; bypass with 0.1µF ceramic capacitor to GND for noise immunity |
| IN1–IN3 (Pins 1, 3, 4) | Monitored voltage inputs | High-impedance (≥500kΩ) analog inputs; support fixed or resistor-divider-adjusted thresholds |
| OUT1–OUT3 (Pins 11, 14, 15) | Open-drain status outputs | Each asserts low when corresponding INx falls below threshold or ENx goes low; require external pullup to 0–28V |
| EN1–EN3 (Pins 12, 16, 17) | Active-high enable inputs | Digital control to force respective OUTx low independently - enables dynamic rail disable during operation |
| CDLY1–CDLY3 (Pins 2, 5, 6) | Capacitor-delay timing inputs | Connect external capacitor to GND to set INx→OUTx propagation delay (250nA charge to 1V) |
| TH0/TH1 (Pins 7, 19) | Threshold select logic inputs | Two-pin binary code selects among nine threshold options per monitored input (see Table 2) |
| TOL (Pin 8) | Tolerance select input | GND = 5% threshold tolerance; VCC = 10% tolerance - sets hysteresis and nominal offset |
| RESET (Pin 10) | Push-pull active-low system reset | Asserts low if any INx < threshold, any ENx low, or MR asserted; deasserts after all conditions met + timeout |
| MR (Pin 13) | Manual reset input | Active-low; internal 500nA pullup allows floating if unused; 2µs minimum pulse width required |
| CRESET (Pin 18) | Capacitor-adjustable reset timeout input | Connect capacitor to GND to set timeout (500nA charge to 0.5V); connect to VCC for 140ms min fixed timeout |
| GND (Pin 20) | Ground reference | Primary return path; EP (exposed pad) is electrically connected to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | Enables per-rail power-good signaling and selective enable/disable without shared logic or timing constraints |
| Logic-selectable thresholds | Nine combinations via TH0/TH1 pins - supports 3.3V/2.5V/1.8V/1.5V/1.2V fixed or 0.5V adjustable rails in same footprint |
| Capacitor-adjustable timing | CDLYx and CRESET pins allow precise, low-cost delay and reset timeout tuning without external ICs or crystals |
| 28V-tolerant open-drain outputs | Direct interface to enable/shutdown pins of DC-DC regulators operating up to 28V without level-shifting circuitry |
| Industrial temperature grade | Guaranteed operation from -40°C to +125°C - suitable for server, storage, and telecom equipment with high ambient heat |
| Manual reset with internal pullup | MR pin includes 500nA internal pullup, eliminating external resistor in most applications and simplifying board layout |
Applications
| Server Power Sequencing | Industrial PLC Power Management |
|---|---|
|
Use Scenario: Controlling startup order of 3.3V, 1.8V, and 1.5V rails in a dual-CPU server motherboard with strict ramp-time and dependency requirements. IC Role / Device Role / Timing Role: Triple-voltage supervisor providing independent, capacitor-delayed power-good signals to enable downstream DC-DC converters in sequence. Use Value: Eliminates need for discrete RC timers or microcontroller-based sequencing, reducing BOM count and firmware complexity while meeting JEDEC JESD84-B51 timing compliance. |
Use Scenario: Monitoring redundant 24V, 5V, and 3.3V supplies in an industrial programmable logic controller exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Fault-detecting supervisor with 125°C rating and 28V-tolerant outputs driving enable lines of isolated DC-DC modules. Use Value: Ensures safe shutdown on single-rail failure while maintaining operation of non-critical subsystems - improves system uptime and diagnostic granularity. |
| Telecom Line Card Supervision | Storage Controller Power Integrity |
|
Use Scenario: Validating stable operation of +12V bias, +3.3V core, and +1.8V I/O rails on a high-density optical line card before FPGA configuration begins. IC Role / Device Role / Timing Role: Sequencing supervisor asserting RESET only after all three rails meet threshold and timing windows, preventing partial initialization. Use Value: Prevents FPGA configuration corruption and reduces field returns due to undetected brownout conditions during hot-swap insertion. |
Use Scenario: Ensuring clean power-up of NVMe SSD controller, DRAM buffer, and flash memory interface rails in enterprise storage enclosures. IC Role / Device Role / Timing Role: Triple-rail monitor with adjustable thresholds (e.g., 1.2V ±5% for DDR4 VDDQ) and independent EN_ control for dynamic rail gating. Use Value: Enables precise voltage margining during production test and runtime adaptive power management without additional supervisory ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16043TG+ | Quad-monitor (4 inputs), 24-pin TQFN; adds IN4/OUT4/EN4/CDLY4; identical threshold accuracy, timing architecture, and RESET behavior | Required when fourth rail (e.g., auxiliary 1.0V or VDDIO) must be supervised with same timing and logic flexibility | Select MAX16043TG+ only if fourth monitored rail is needed; pinout and footprint differ - not drop-in compatible |
| TPS3808G33DBVR | Single-channel 3.3V supervisor (SOT-23-6); fixed threshold only; no capacitor-adjustable delay; no enable input; 1.8V–6V VCC range | Limited to basic 3.3V monitoring without sequencing, multi-rail coordination, or adjustable timing | Use TPS3808G33DBVR only for cost-sensitive, single-rail applications where sequencing and flexibility are unnecessary |
Compared with MAX16043TG+, the MAX16042TP+T saves board space and cost by omitting the fourth channel while retaining full sequencing capability for three-rail systems; compared with TPS3808G33DBVR, it delivers scalable supervision with logic-selectable thresholds, capacitor-adjustable delays, and independent enable control - essential for complex multivoltage platforms.
Availability
MAX16042TP+T is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC power management, telecom line card supervision, and storage controller power integrity applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX16042TP+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, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The MAX1604x family was developed specifically for multivoltage system supervision and controlled power-up sequencing in servers, storage, and networking equipment - emphasizing accuracy, flexibility, and high-temperature reliability.
FAQ
What is the maximum number of voltage rails monitored by the MAX16042TP+T?
The MAX16042TP+T monitors exactly three independent voltage rails: IN1, IN2, and IN3. It is the triple-monitor variant in the MAX16041/MAX16042/MAX16043 family - distinct from the dual-rail MAX16041TE+ and quad-rail MAX16043TG+. Each rail has its own threshold, enable input, delay capacitor terminal, and open-drain output, allowing fully independent supervision and sequencing control within the MAX16042TP+T device.
Can the MAX16042TP+T support adjustable thresholds below 1.2V?
Yes, the MAX16042TP+T supports adjustable thresholds as low as 0.5V (±1.5% accuracy) when configured in adjustable mode using the TH0/TH1 pins and external resistor divider. This is achieved by setting the internal reference to 0.472V (TOL = VCC) or 0.5V (TOL = GND), then scaling the input voltage with R1/R2. The datasheet confirms VTH = 0.492V to 0.508V (TOL = GND) and 0.463V to 0.481V (TOL = VCC) - enabling reliable monitoring of sub-1V rails like DDR4 VDDQ or core logic supplies.
How does the MAX16042TP+T handle reset timeout adjustment?
The MAX16042TP+T offers two reset timeout options: a fixed minimum of 140ms (by connecting CRESET to VCC), or a capacitor-adjustable period (by connecting CRESET to GND through an external capacitor). The timeout is calculated as tRP = (0.5V / 500nA) + (CCRESET × 30µs/nF), where CCRESET is in farads. For example, a 100nF capacitor yields ~170ms timeout. The internal 500nA current source charges CRESET to 0.5V before RESET deasserts - ensuring predictable, repeatable timing without external clock sources.
What is the purpose of the TOL pin on the MAX16042TP+T?
The TOL pin on the MAX16042TP+T selects the threshold tolerance: connecting TOL to GND configures 5% below nominal voltage (e.g., 3.135V for 3.3V rail), while connecting TOL to VCC selects 10% below nominal (e.g., 2.97V). This directly affects both fixed and adjustable threshold accuracy and is used in conjunction with TH0/TH1 to define the final trip point. Leaving TOL unconnected is not allowed - it must be actively driven to GND or VCC to ensure deterministic behavior across temperature and process variation.
Does the MAX16042TP+T require external pullup resistors on its open-drain outputs?
Yes, the MAX16042TP+T's OUT1–OUT3 pins are open-drain and require external pullup resistors to function correctly. These resistors can connect to any voltage rail from 0V to 28V, enabling direct interfacing with enable/shutdown inputs of DC-DC regulators. Pullup values depend on sink current limits: for example, with VCC = 2.25V and 0.5mA max sink current, the resistor must be ≥56kΩ; for 12V pullup, ≥24kΩ is recommended. No pullup is needed on the push-pull RESET output.
MAX16042TP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 9 Selectable Threshold Combinations
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms/Adjustable Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (4x4)
MAX16042TP+T FAQ
1.How can I place an order for MAX16042TP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16042TP+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 MAX16042TP+T reliable?
The price and inventory of MAX16042TP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16042TP+T is usually 5 days.
3.What payment methods are accepted for MAX16042TP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16042TP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16042TP+T?
MAX16042TP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16042TP+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 MAX16042TP+T?
For technical support, including MAX16042TP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16042TP+T requirements.
6.How does Aetrix verify that MAX16042TP+T is sourced from the original manufacturer or authorized distributors?
All MAX16042TP+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 MAX16042TP+T meets industry standards.
7.What is the process for return or replacement of MAX16042TP+T?
All MAX16042TP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16042TP+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 MAX16042TP+T part is unused and in its original packaging.
Return procedure for MAX16042TP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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