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Analog Devices Inc./Maxim Integrated MAX16056ATA29+T
- Part No.:
- MAX16056ATA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16056ATA29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,195
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Product details
Overview
MAX16056ATA29+T from Analog Devices is an ultra-low-power microprocessor supervisory IC with factory-trimmed 2.925V reset threshold, 125nA typical supply current, capacitor-adjustable reset timeout (14.18ms with 2700pF), and integrated watchdog timer with 128× extended mode. It monitors single-supply VCC in battery-powered medical and portable electronics to ensure reliable power-on reset and fault recovery.
For engineers reviewing the MAX16056ATA29+T datasheet, MAX16056ATA29+T pinout, MAX16056ATA29+T application, or MAX16056ATA29+T equivalent, key selection criteria include its 2.925V reset threshold tolerance (±2.5% over -40°C to +125°C), push-pull RESET output capable of sinking 1.2mA at VCC ≥ 2.7V, and watchdog timeout programmability via SWT capacitor with WDS input for 128× extension.
Technical Context
The MAX16056ATA29+T implements a precision bandgap-based voltage monitor with 0.5% hysteresis and guarantees valid RESET assertion down to VCC = 1.1V. Its internal ramp-compare architecture uses SRT and SWT capacitors to generate timing intervals-reset timeout tRP = 5.15 × 10⁶ × CSRT (seconds) and watchdog period tWD = Floor[CSWT × 5.15 × 10⁶ / 6.4ms] × 6.4ms + 3.2ms.
It features active-low manual reset (MR) with 1µs minimum pulse width and 250ns MR-to-RESET delay, watchdog input (WDI) with 150ns minimum pulse detection, and watchdog select (WDS) that clears the timer on any transition. The device samples SWT capacitance after RESET deassertion and disables watchdog if CSWT > 0.47µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V (factory-trimmed, ±2.5% over -40°C to +125°C) |
| Supply Current | 125nA typ at VCC = 1.8V, TA = -40°C to +125°C |
| Reset Timeout | 14.18ms with 2700pF SRT capacitor (tRP = 5.15 × 10⁶ × CSRT) |
| Watchdog Period | 6.4ms typical base period (tWDPER), extendable to 128× via WDS |
| Operating Range | VCC = 1.1V to 5.5V; temperature = -40°C to +125°C |
| RESET Output | Push-pull, sinks 1.2mA at VCC ≥ 2.7V, VOL ≤ 0.3V |
| Input Leakage | ±100nA on MR, WDI, WDS pins |
Pinout & Package
MAX16056ATA29+T is housed in an 8-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) connected to GND. Pin 1 is RESET, Pin 2 is GND, Pin 3 is SWT, Pin 4 is MR, Pin 5 is SRT, Pin 6 is WDS, Pin 7 is WDI, and Pin 8 is VCC. Pin 5 (N.C.) is not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout, MR activation, or watchdog timeout; remains low for adjustable tRP after recovery |
| 2 - GND | Ground reference | Primary return path for all internal circuits and external capacitors (SRT, SWT) |
| 3 - SWT | Watchdog timeout capacitor input | Connects to GND via capacitor to set base watchdog period; sampled after RESET deassertion; open or short disables watchdog |
| 4 - MR | Manual reset input | Active-low asynchronous reset trigger; no internal pullup; requires external pullup if unused |
| 5 - SRT | Reset timeout capacitor input | Connects to GND via capacitor to set reset assertion duration; determines tRP per tRP = 5.15 × 10⁶ × CSRT |
| 6 - WDS | Watchdog select input | Low = normal mode (tWD); high = extended mode (tWD × 128); transition clears watchdog timer |
| 7 - WDI | Watchdog input | Falling edge resets watchdog counter; detects pulses ≥150ns; cleared by any RESET assertion |
| 8 - VCC | Power supply input | Monitored supply rail; bypass with 0.1µF ceramic capacitor to GND; supports 1.1V–5.5V operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 125nA typical enables multi-year battery life in glucose monitors and portable meters |
| Capacitor-programmable reset timeout | Adjustable tRP from ~10ms to >2s using standard ceramic capacitors (39pF–4.7µF) |
| Dual-mode watchdog timer | Normal or 128× extended timeout via WDS pin-supports both fast-fault and long-interval software supervision |
| Guaranteed RESET validity | RESET remains functional and asserted down to VCC = 1.1V, ensuring robust brownout response |
| Transient immunity | Immune to VCC glitches ≤40µs at 100mV overdrive, reducing false resets in noisy automotive environments |
Applications
| Glucose Monitors | Patient Monitors |
|---|---|
Use Scenario: Continuous blood glucose sensing in wearable patch pumps requiring low-power, long-battery-life operation. IC Role / Device Role / Timing Role: Supervises main 3.3V system rail and triggers full MCU reset on brownout or software hang via WDI monitoring. Use Value: 125nA supply current extends battery life beyond 12 months; 2.925V threshold matches Li-ion discharge profile. | Use Scenario: Portable ECG and SpO₂ devices operating from coin-cell batteries in clinical and home settings. IC Role / Device Role / Timing Role: Provides power-on reset and watchdog supervision for ARM Cortex-M0+ MCU running real-time vital-sign algorithms. Use Value: Push-pull RESET ensures clean logic-level assertion without external pullup; tRP programmability aligns with MCU boot time requirements. |
| Metering (Smart Meters) | HVAC Controllers |
Use Scenario: Battery-backed gas/water meters deployed in remote locations with 10+ year field life requirements. IC Role / Device Role / Timing Role: Monitors backup supercapacitor voltage and initiates controlled shutdown/reset during main power loss. Use Value: Factory-trimmed 2.925V threshold provides precise trip point for 3.0V backup rails; -40°C to +125°C rating ensures outdoor reliability. | Use Scenario: Wireless thermostat controllers powered by alkaline AA batteries in residential HVAC systems. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output and services watchdog via periodic firmware heartbeat on WDI. Use Value: WDS-selectable 128× watchdog extension allows infrequent wake-up intervals (e.g., 217s with 0.33µF), minimizing active time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16058ATA29+T | Same 2.925V threshold and watchdog functionality, but open-drain RESET output instead of push-pull | Requires external pullup resistor; better suited for level-shifting or wired-OR reset bus configurations | Select when interfacing with mixed-voltage MCUs or shared reset lines where open-drain behavior is required |
| TLV809E29DBZR | Fixed 2.93V threshold, no watchdog, no capacitor-adjustable timeout; 350nA supply current; SOT-23-3 package | Lacks programmable timing and fault supervision; only provides basic reset on VCC drop | Choose for cost-sensitive, space-constrained designs where watchdog and adjustable tRP are unnecessary |
Compared with MAX16058ATA29+T, the MAX16056ATA29+T offers push-pull drive eliminating external components, while TLV809E29DBZR trades timing flexibility and ultra-low current for smaller footprint and lower unit cost in simple reset-only roles.
Availability
MAX16056ATA29+T is available at Aetrix Electronics and suitable for portable medical devices, smart metering, and industrial HVAC controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX16056ATA29+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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX16056 series belongs to Analog Devices' nanoPower supervisory product line, designed specifically for ultra-low-power, battery-critical applications where sub-200nA quiescent current and guaranteed operation down to 1.1V are essential.
FAQ
What is the factory-trimmed reset threshold voltage for MAX16056ATA29+T?
The MAX16056ATA29+T has a factory-trimmed reset threshold of 2.925V (typical), with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value corresponds to the "29" suffix in the part number per Table 1 of the datasheet, and is laser-trimmed during production for precision.
Does MAX16056ATA29+T support watchdog timer disable functionality?
Yes, MAX16056ATA29+T supports watchdog disable by connecting the SWT pin directly to GND. When SWT is grounded, the internal watchdog sampling circuit detects zero capacitance and disables the watchdog function, preventing unintended resets while retaining full reset supervision capability.
What is the recommended capacitor value for achieving a 14.18ms reset timeout with MAX16056ATA29+T?
The MAX16056ATA29+T achieves a 14.18ms reset timeout with a 2700pF capacitor connected between the SRT pin and GND, as specified in Table 2 of the datasheet. A low-leakage X7R ceramic capacitor is recommended to maintain timing accuracy across temperature and time.
Can MAX16056ATA29+T operate reliably at VCC = 1.1V?
Yes, MAX16056ATA29+T guarantees valid RESET output functionality down to VCC = 1.1V, including proper assertion and timing behavior. Below 1.1V, RESET may become invalid; however, the device continues to draw only 7µA (typ) in reset state, supporting graceful shutdown in ultra-low-voltage scenarios.
What package type and dimensions does MAX16056ATA29+T use?
MAX16056ATA29+T uses an 8-pin TDFN-EP (Thin Dual Flat No-lead with Exposed Pad) package measuring 3mm × 3mm × 0.75mm. The exposed pad (EP) must be soldered to a GND plane for thermal and electrical performance, and the land pattern follows Analog Devices' standard 90-0059 footprint.
MAX16056ATA29+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:
- 2.925V
- 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)
MAX16056ATA29+T FAQ
1.How can I place an order for MAX16056ATA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16056ATA29+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 MAX16056ATA29+T reliable?
The price and inventory of MAX16056ATA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16056ATA29+T is usually 5 days.
3.What payment methods are accepted for MAX16056ATA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16056ATA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16056ATA29+T?
MAX16056ATA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16056ATA29+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 MAX16056ATA29+T?
For technical support, including MAX16056ATA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16056ATA29+T requirements.
6.How does Aetrix verify that MAX16056ATA29+T is sourced from the original manufacturer or authorized distributors?
All MAX16056ATA29+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 MAX16056ATA29+T meets industry standards.
7.What is the process for return or replacement of MAX16056ATA29+T?
All MAX16056ATA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16056ATA29+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 MAX16056ATA29+T part is unused and in its original packaging.
Return procedure for MAX16056ATA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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