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Analog Devices Inc./Maxim Integrated MAX16056ATA26+
- Part No.:
- MAX16056ATA26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16056ATA26+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,093
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Product details
Overview
The MAX16056ATA26+ from Analog Devices is an ultra-low-power microprocessor supervisory IC with factory-trimmed 2.625V reset threshold, 125nA typical supply current, and integrated watchdog timer. It monitors VCC in battery-powered systems, asserts active-low RESET on brownout or manual reset, and supports capacitor-adjustable reset timeout (10.5–17.0ms) and watchdog timeout (normal/128× extended modes). Used in glucose monitors and portable medical devices requiring guaranteed RESET validity down to 1.1V.
For engineers reviewing the MAX16056ATA26+ datasheet, MAX16056ATA26+ pinout, MAX16056ATA26+ application, or MAX16056ATA26+ equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior under temperature variation, capacitor-based timeout design guidance, and validated alternative parts for low-power supervisory circuit selection.
Technical Context
The MAX16056ATA26+ implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy at +25°C and ±2.5% over –40°C to +125°C, paired with a ramp-current-based timeout generator using SRT and SWT pins. Its watchdog logic clears on WDI falling edge or WDS transition and supports 128× timeout extension via WDS high.
RESET output is push-pull, guaranteed valid for VCC ≥ 1.1V, with VOL ≤ 0.3V at 50µA sink and VOH ≥ 0.8×VCC at 200µA source. The device features power-supply transient immunity up to 40µs for 100mV overdrive and includes capacitor-open detection on SWT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.625V (factory-trimmed, ±2.5% over –40°C to +125°C); sets brownout detection point for 2.8V nominal rails |
| Supply Current | 125nA typical at VCC = 1.8V, –40°C to +125°C; enables >10-year battery life in always-on monitoring |
| Reset Timeout | 10.5–17.0ms (CSRT = 2700pF); ensures µP completes power-up initialization before release |
| Watchdog Timeout | 5–9.5ms base period (tWDPER), extendable to 296s max via 128× mode; supports firmware service intervals from ms to minutes |
| Operating Range | VCC = 1.1V to 5.5V; guarantees functional RESET assertion even during deep brownout |
| Temperature Range | –40°C to +125°C; qualified for automotive and industrial embedded environments |
| Output Type | Push-pull RESET; eliminates external pull-up resistor, reduces BOM count and leakage path |
Pinout & Package
MAX16056ATA26+ uses an 8-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) connected to GND per layout guidelines. 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 push-pull reset output | Drives µP reset pin directly; sinks 50µA @ 0.3V, sources 200µA @ 0.8×VCC; no external pull-up needed |
| 2 - GND | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 - SWT | Watchdog timeout capacitor input | Connects to GND via CSWT (2275pF–0.54µF); sampled after RESET deassertion to set tWD; open detect enabled |
| 4 - MR | Manual reset input | CMOS-compatible active-low input; 1µs minimum pulse width; no internal pull-up; requires external VCC tie if unused |
| 5 - SRT | Reset timeout capacitor input | Connects to GND via CSRT (39pF–4.7µF); sets tRP = 5.15×10⁶ × CSRT; determines post-brownout hold time |
| 6 - WDS | Watchdog select input | Ground = normal mode (tWD); VCC = extended mode (tWD × 128); transition clears watchdog counter |
| 7 - WDI | Watchdog input | Falling-edge-triggered; 150ns minimum pulse width; resets watchdog timer; cleared by any RESET assertion |
| 8 - VCC | Supply voltage input | Monitored rail input (1.1–5.5V); bypass with 0.1µF ceramic capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 125nA typical supply current enables multi-year operation on coin-cell batteries in portable medical devices |
| Capacitor-adjustable tRP & tWD | Two independent RC timing paths allow precise, board-level tuning of reset and watchdog intervals without firmware changes |
| Watchdog disable via SWT-GND | Connecting SWT to GND disables watchdog function entirely-no software or pin configuration required |
| RESET validity to 1.1V | Guaranteed functional RESET output even as VCC collapses below 1.2V, preventing undefined µP state during shutdown |
| Transient immunity | Immune to 40µs, 100mV VCC transients-reduces false resets in noisy automotive or industrial power environments |
Applications
| Glucose Monitoring Systems | Patient Vital Sign Monitors |
|---|---|
Use Scenario: Continuous glucose sensing in wearable patch pumps where battery life exceeds 12 months and firmware must recover reliably from brownout events. IC Role / Device Role / Timing Role: Supervises 2.8V Li-ion supply; asserts RESET during battery sag below 2.625V; holds µP in reset for 14.18ms (CSRT = 2700pF) to ensure ADC and RF startup stability. Use Value: Prevents corrupted sensor readings or missed alarms by guaranteeing clean power-up sequencing and watchdog-enforced firmware liveness checks. |
Use Scenario: Portable ECG/SpO₂ units powered by AAA alkaline cells operating across –20°C to +50°C ambient conditions. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; triggers reset on cold-temperature VCC droop; uses WDS = GND for 6.4ms watchdog timeout to match firmware heartbeat interval. Use Value: Eliminates field failures due to firmware lockup during transport or storage by enforcing periodic watchdog servicing without increasing quiescent current. |
| Smart Utility Meters | HVAC Sensor Nodes |
Use Scenario: Battery-backed AMI meters deployed in unheated outdoor enclosures with wide seasonal temperature swings. IC Role / Device Role / Timing Role: Supervises 3.6V primary supply; leverages ±2.5% VTH tolerance over –40°C to +125°C; uses push-pull RESET to drive meter SoC reset with no external components. Use Value: Reduces bill-of-materials cost and PCB area versus discrete supervisor + pull-up solutions while maintaining AEC-Q100-aligned reliability. |
Use Scenario: Wireless temperature/humidity nodes in commercial HVAC ducts where thermal cycling stresses power integrity. IC Role / Device Role / Timing Role: Watches 2.5V rail from energy-harvesting converter; uses SWT capacitor to set 217s extended watchdog timeout matching sleep-wake cycle. Use Value: Enables ultra-low-power duty-cycling (e.g., wake every 3.5 minutes) while ensuring recovery from firmware hangs caused by EMI-induced memory corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16058ATA26+ | Same 2.625V threshold and 8-pin TDFN package, but open-drain RESET output | Requires external pull-up resistor; suited for level-shifting or wired-OR reset bus configurations | Select when interfacing with mixed-voltage µPs or sharing RESET line across multiple domains |
| MAX16057ATT26+ | Same 2.625V threshold and push-pull RESET, but 6-pin TDFN and no watchdog timer | Smaller footprint and lower cost where watchdog functionality is unnecessary | Select for space-constrained, non-safety-critical applications like simple power-on reset in consumer wearables |
Compared with MAX16056ATA26+, MAX16058ATA26+ trades push-pull simplicity for interface flexibility, while MAX16057ATT26+ sacrifices watchdog capability for minimal size-making MAX16056ATA26+ optimal for compact, safety-aware designs needing both robust reset and firmware supervision.
Availability
MAX16056ATA26+ is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign equipment, and smart utility meters requiring stable component supply across automotive-grade temperature ranges and long-life battery operation.
Supply support for MAX16056ATA26+ 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, headquartered in Wilmington, MA.
The MAX16056–MAX16059 family was designed specifically for ultra-low-power supervisory functions in portable medical, industrial, and automotive systems where nanoscale current consumption and guaranteed reset behavior under brownout are critical.
FAQ
What is the exact reset threshold voltage of the MAX16056ATA26+?
The MAX16056ATA26+ has a factory-trimmed reset threshold of 2.625V, with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet under suffix "26", and applies specifically to the MAX16056ATA26+ variant-not generic to the MAX16056 family.
Does the MAX16056ATA26+ require external components to operate?
Yes-the MAX16056ATA26+ requires three external components for full functionality: a 0.1µF bypass capacitor from VCC to GND, a capacitor (CSRT) from SRT to GND to set reset timeout, and a capacitor (CSWT) from SWT to GND to configure watchdog timeout. No pull-up is needed due to its push-pull RESET output.
Can the watchdog timer in the MAX16056ATA26+ be disabled?
Yes-the watchdog timer in the MAX16056ATA26+ is disabled by connecting the SWT pin directly to GND. This action forces the watchdog sampling circuit to detect zero capacitance and halt timeout generation, resulting in continuous RESET deassertion as long as VCC remains above threshold.
What is the minimum VCC voltage at which MAX16056ATA26+ guarantees valid RESET output?
The MAX16056ATA26+ guarantees valid RESET output down to VCC = 1.1V, as specified in the Electrical Characteristics table. Below this voltage, RESET may become indeterminate-so system designers must ensure critical logic remains inactive or held in reset until VCC exceeds 1.1V.
How does temperature affect the reset timeout period of the MAX16056ATA26+?
The reset timeout period (tRP) of the MAX16056ATA26+ exhibits ±4% variation over –40°C to +125°C, as shown in Typical Operating Characteristic Figure toc04. At extremes, tRP deviates no more than 1.04× or 0.96× the nominal value set by CSRT-enabling predictable timing across automotive and industrial environments.
MAX16056ATA26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- 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)
MAX16056ATA26+ FAQ
1.How can I place an order for MAX16056ATA26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16056ATA26+ 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 MAX16056ATA26+ reliable?
The price and inventory of MAX16056ATA26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16056ATA26+ is usually 5 days.
3.What payment methods are accepted for MAX16056ATA26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16056ATA26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16056ATA26+?
MAX16056ATA26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16056ATA26+ 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 MAX16056ATA26+?
For technical support, including MAX16056ATA26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16056ATA26+ requirements.
6.How does Aetrix verify that MAX16056ATA26+ is sourced from the original manufacturer or authorized distributors?
All MAX16056ATA26+ 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 MAX16056ATA26+ meets industry standards.
7.What is the process for return or replacement of MAX16056ATA26+?
All MAX16056ATA26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16056ATA26+, 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 MAX16056ATA26+ part is unused and in its original packaging.
Return procedure for MAX16056ATA26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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