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Analog Devices Inc./Maxim Integrated MAX16056ATA31+T
- Part No.:
- MAX16056ATA31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16056ATA31+T.pdf
- Description:
- IC SUPERVISOR P-P 3.1V 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,632
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Product details
Overview
The MAX16056ATA31+T from Analog Devices is an ultra-low-power microprocessor supervisory IC with factory-trimmed 3.075V reset threshold, capacitor-adjustable reset timeout (14.18ms typical), and integrated watchdog timer with 128× extended mode. It features push-pull RESET output, operates from 1.1V to 5.5V, draws only 125nA typical supply current, and is qualified for automotive applications from −40°C to +125°C.
For engineers reviewing the MAX16056ATA31+T datasheet, MAX16056ATA31+T pinout, MAX16056ATA31+T application, or MAX16056ATA31+T equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, thermal performance data, and validated alternative options - all specific to the ATA31 variant in 8-pin TDFN-EP package.
Technical Context
This device implements a precision voltage monitor with ±2.5% threshold tolerance over temperature, hysteresis of 0.5%, and guaranteed RESET validity down to VCC = 1.1V. Its internal ramp-based timing architecture uses SRT and SWT pins to set reset and watchdog timeouts via external capacitors, with sampling completed after RESET deassertion.
The watchdog circuit supports two modes: normal (tWD = Floor[CSWT × 5.15×10⁶/6.4ms] × 6.4ms + 3.2ms) and extended (×128), with WDS input selecting mode and automatic clear-on-transition. Watchdog fault detection requires a falling edge on WDI within the timeout window, with minimum pulse width of 150ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.075V (factory-trimmed, ±2.5% over −40°C to +125°C) |
| Supply Current | 125nA typical at VCC = 1.8V, −40°C to +125°C - enables multi-year battery life in portable systems |
| Operating Voltage Range | 1.1V to 5.5V - supports single-cell Li-ion, coin-cell, and wide-input industrial rails |
| Reset Timeout Period | 14.18ms typical with 2700pF SRT capacitor - ensures reliable μP initialization after power recovery |
| Watchdog Timeout (Normal Mode) | 6.4ms typical clock period - provides precise software execution monitoring |
| Package | 8-pin TDFN-EP (3mm × 3mm, 0.75mm height) - exposes thermal pad for enhanced heat dissipation |
| Temperature Range | −40°C to +125°C - fully specified for under-hood automotive and industrial environments |
Pinout & Package
MAX16056ATA31+T is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed thermal pad (EP) that must be connected to GND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives low during VCC undervoltage, MR assertion, or watchdog timeout; remains low for tRP after recovery |
| 2 - GND | Ground reference | Primary return path for all internal circuits and external capacitor connections (SRT, SWT) |
| 3 - SWT | Watchdog timeout capacitor input | Connects to GND via CSWT to set basic watchdog period; grounded to disable watchdog function |
| 4 - MR | Manual reset input | Active-low asynchronous reset trigger; no internal pullup - must be tied to VCC if unused |
| 5 - SRT | Reset timeout capacitor input | Connects to GND via CSRT to set reset assertion duration; determines tRP = 5.15×10⁶ × CSRT |
| 6 - WDI | Watchdog input | Falling-edge-triggered; must be toggled within tWD to prevent reset; minimum pulse width 150ns |
| 7 - WDS | Watchdog select input | GND = normal mode; VCC = 128× extended mode; transition clears watchdog counter |
| 8 - VCC | Power supply input | Monitored supply rail; bypass with 0.1µF ceramic capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 125nA typical supply current enables >10-year operation on CR2032 coin cell in sleep-monitoring applications |
| Capacitor-adjustable timing | SRT and SWT pins allow precise, board-level tuning of reset and watchdog periods without firmware changes |
| Watchdog capacitor open-detect | SWT < 470pF causes continuous RESET assertion - detects PCB assembly defects or missing capacitor |
| Transient immunity | Immune to 100mV VCC glitches ≤40µs duration - prevents false resets in noisy automotive environments |
| Guaranteed RESET validity | RESET output remains functional down to VCC = 1.1V - ensures robust brownout recovery before μP lockup |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Glucose monitors and patient telemetry units powered by single-cell lithium batteries with infrequent wake-up cycles. IC Role / Device Role / Timing Role: Supervises VCC during deep-sleep wake-up; asserts RESET until stable rail is confirmed and μP firmware initializes. Use Value: 125nA ICC extends battery life beyond 5 years; adjustable tRP ensures compatibility with diverse μP boot sequences. |
Use Scenario: Door module ECUs exposed to load-dump transients and cold-crank conditions in vehicle door latches and mirror controls. IC Role / Device Role / Timing Role: Monitors 5V supply rail; triggers watchdog reset if CAN communication stalls due to EMI-induced μP hang. Use Value: −40°C to +125°C qualification and 40µs transient immunity prevent spurious resets during engine cranking. |
| Smart Utility Meters | Industrial IoT Edge Nodes |
Use Scenario: Battery-backed AMI meters performing periodic RF transmission and sensor reads in remote deployments. IC Role / Device Role / Timing Role: Provides capacitor-programmable reset timeout matching MCU boot time; manual reset via tamper switch. Use Value: Push-pull RESET drives meter SoC directly; 3.075V threshold matches common 3.3V LDO output with margin. |
Use Scenario: Wireless vibration sensors mounted on motors, operating intermittently on primary lithium thionyl chloride cells. IC Role / Device Role / Timing Role: Uses WDI tied to μP GPIO to verify firmware execution; extended watchdog mode enables multi-hour supervision windows. Use Value: SWT capacitor selection yields 217s watchdog timeout (0.33µF), aligning with sensor wake interval without firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16058ATA31+T | Same 3.075V threshold and timing specs, but open-drain RESET output | Requires external pullup; supports level-shifting to different logic rails | Select when interfacing with mixed-voltage systems or needing RESET to drive multiple loads |
| TLV809E30DBZR | Fixed 3.0V reset threshold, no watchdog, 350nA ICC, SOT-23-3 package | Lacks capacitor-adjustable timing and system supervision features | Choose for cost-sensitive, space-constrained designs where only basic reset is required |
Compared with MAX16056ATA31+T, MAX16058ATA31+T offers identical supervision intelligence but open-drain flexibility, while TLV809E30DBZR trades programmability and ultra-low power for minimal footprint and lower unit cost in non-watchdog applications.
Availability
MAX16056ATA31+T is available at Aetrix Electronics and suitable for portable medical devices, automotive body electronics, smart utility meters, and industrial IoT edge nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX16056ATA31+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX16056–MAX16059 family was designed specifically for ultra-low-power system supervision in battery-critical and automotive-grade applications, emphasizing nanoamp current draw, capacitor-programmable timing, and robust transient immunity.
FAQ
What is the exact reset threshold voltage for MAX16056ATA31+T?
The MAX16056ATA31+T has a factory-trimmed reset threshold voltage of 3.075V (typical), with tolerance of ±2.5% over the full −40°C to +125°C operating temperature range. This value is confirmed in Table 1 of the datasheet under suffix "31", and applies specifically to the MAX16056ATA31+T variant - not the broader MAX16056 family.
Does MAX16056ATA31+T include a watchdog timer?
Yes, MAX16056ATA31+T includes a fully functional watchdog timer with selectable normal and 128× extended modes via the WDS pin. It requires an external capacitor on SWT and periodic falling edges on WDI to prevent reset assertion. This feature is present only in MAX16056/MAX16058 variants - not in MAX16057/MAX16059.
What package type and dimensions does MAX16056ATA31+T use?
MAX16056ATA31+T uses an 8-pin TDFN-EP package measuring 3.0mm × 3.0mm × 0.75mm with an exposed thermal pad (EP). The land pattern is documented as outline 21-0137 and footprint 90-0059 on analog.com/packages. Pin 1 is marked with a dot, and EP must be soldered to GND for thermal and electrical integrity.
How is the reset timeout period set for MAX16056ATA31+T?
The reset timeout period for MAX16056ATA31+T is set using an external capacitor (CSRT) connected between the SRT pin and GND. The relationship is tRP = 5.15 × 10⁶ × CSRT (seconds), yielding 14.18ms typical with 2700pF. Ceramic X7R capacitors are recommended, and values from 39pF to 4.7µF are supported per Table 2.
Is MAX16056ATA31+T qualified for automotive applications?
Yes, MAX16056ATA31+T is fully specified and qualified for automotive applications across the −40°C to +125°C temperature range. It meets stringent requirements for transient immunity (40µs @ 100mV), supply voltage robustness (VCC = 1.1V to 5.5V), and long-term reliability - making it suitable for body control modules, telematics, and ADAS subsystems.
MAX16056ATA31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX16056ATA31+T FAQ
1.How can I place an order for MAX16056ATA31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16056ATA31+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 MAX16056ATA31+T reliable?
The price and inventory of MAX16056ATA31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16056ATA31+T is usually 5 days.
3.What payment methods are accepted for MAX16056ATA31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16056ATA31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16056ATA31+T?
MAX16056ATA31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16056ATA31+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 MAX16056ATA31+T?
For technical support, including MAX16056ATA31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16056ATA31+T requirements.
6.How does Aetrix verify that MAX16056ATA31+T is sourced from the original manufacturer or authorized distributors?
All MAX16056ATA31+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 MAX16056ATA31+T meets industry standards.
7.What is the process for return or replacement of MAX16056ATA31+T?
All MAX16056ATA31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16056ATA31+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 MAX16056ATA31+T part is unused and in its original packaging.
Return procedure for MAX16056ATA31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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