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Analog Devices Inc./Maxim Integrated MAX16056ATA46+
- Part No.:
- MAX16056ATA46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX16056ATA46+.pdf
- Description:
- IC SUPERVISOR P-P 4.6V 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,006
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Product details
Overview
MAX16056ATA46+ from Analog Devices is an ultra-low-power microprocessor supervisory IC with factory-trimmed 4.625V reset threshold, 125nA typical supply current, capacitor-adjustable reset timeout (14.18ms with 2700pF), watchdog timer with 128× extension mode, and push-pull RESET output. It monitors VCC in battery-powered medical and portable electronics to ensure reliable power-on reset and brownout recovery.
For engineers reviewing the MAX16056ATA46+ datasheet, MAX16056ATA46+ pinout, MAX16056ATA46+ application, or MAX16056ATA46+ equivalent, this page delivers verified technical context, exact pin functions, automotive-grade (-40°C to +125°C) operating specs, and validated alternative parts for low-power system supervision.
Technical Context
The MAX16056ATA46+ implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy at +25°C and ±2.5% over full temperature range, coupled with dual ramp-based timing circuits: one for reset timeout (SRT pin, 5.15×10⁶ × CSRT) and one for watchdog timeout (SWT/WDS pins, configurable between normal and 128× extended modes). Its internal logic guarantees RESET validity down to VCC = 1.1V.
It features active-low manual reset (MR) with 250ns delay, glitch rejection of 200ns, and watchdog input (WDI) capable of detecting 150ns pulses. The device uses BiCMOS process and integrates transient immunity against VCC glitches up to 40µs at 100mV overdrive - critical for noisy automotive and industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 125nA typical at VCC = 1.8V, TA = –40°C to +125°C - enables multi-year operation on coin-cell batteries |
| Reset Threshold | 4.625V (factory-trimmed, suffix "46"), ±2.5% over –40°C to +125°C - matches 5V rail supervision with margin |
| Reset Timeout | 14.18ms typical with 2700pF on SRT - ensures sufficient hold time for slow-ramping µPs |
| Watchdog Timeout | 6.4ms typical base period (tWDPER), extendable to 217s with 0.33µF and WDS = VCC - supports long software loops |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial embedded use |
| Output Type | Push-pull RESET - eliminates external pull-up, simplifies interface to CMOS µP reset inputs |
| VCC Range | 1.1V to 5.5V - operates during deep brownout and supports wide-input power architectures |
Pinout & Package
MAX16056ATA46+ is housed in an 8-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) for thermal enhancement. 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; pin 8 is VCC. EP must be connected to GND per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset input directly; sinks 50µA at 0.3V max VOL; no external pull-up required |
| 2 - GND | Ground reference | Common return for all analog and digital circuitry; connects to EP for thermal stability |
| 3 - SWT | Watchdog timeout capacitor input | Connects to GND via CSWT (2275pF–0.54µF); sampling determines tWD; open/short detection enabled |
| 4 - MR | Manual reset input | Active-low asynchronous trigger; 250ns MR-to-RESET delay; no internal pull-up - requires external tie-high if unused |
| 5 - SRT | Reset timeout capacitor input | Connects to GND via CSRT (39pF–4.7µF); sets tRP = 5.15×10⁶ × CSRT; low-leakage X7R ceramic recommended |
| 6 - WDS | Watchdog select input | Ground = normal mode (tWD); VCC = extended mode (tWD × 128); transition clears watchdog counter |
| 7 - WDI | Watchdog input | Falling edge resets watchdog timer; detects pulses ≥150ns; tied to GND to disable watchdog function |
| 8 - VCC | Supply and monitored voltage input | Power source and VTH reference; bypass with 0.1µF ceramic to GND; valid down to 1.1V for RESET assertion |
Key Features
| Feature | Design Value |
|---|---|
| 125nA nanoPower operation | Enables >10-year battery life in glucose monitors and portable meters without compromising supervision reliability |
| Capacitor-adjustable reset timeout | Eliminates fixed-timing ICs; allows precise tRP tuning (ms to seconds) via single external capacitor (CSRT) |
| 128× watchdog extension mode | Supports firmware with long idle cycles (e.g., HVAC sensor polling) without requiring high-value, unstable electrolytics |
| Guaranteed RESET down to VCC = 1.1V | Ensures deterministic reset behavior during deep brownout - critical for fail-safe medical devices |
| Power-supply transient immunity | Rejects VCC glitches ≤40µs at 100mV overdrive, preventing spurious resets in electrically noisy environments |
| Factory-trimmed 4.625V threshold | Meets tight 5V rail supervision spec without external resistor divider - reduces BOM count and layout area |
Applications
| Glucose Monitors | Patient Monitoring Systems |
|---|---|
Use Scenario: Portable handheld glucose meter powered by CR2032 coin cell, requiring guaranteed reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervises VCC and asserts RESET until stable power is confirmed; provides 14.18ms timeout for ADC and display initialization. Use Value: Prevents corrupted blood sugar readings due to premature µP execution during weak-battery power-up. |
Use Scenario: Battery-backed bedside patient monitor with ECG, SpO₂, and temperature sensors operating in low-power sleep mode. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and triggers watchdog reset if firmware hangs during sensor polling loop. Use Value: Enables automatic recovery from firmware lockup without clinician intervention - meets IEC 62304 Class B safety requirements. |
| Smart Meters (Electric/Gas) | HVAC Remote Sensors |
Use Scenario: ANSI C12.1-compliant smart electricity meter with optical port and RF mesh communication, deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Supervises 5V auxiliary supply; uses 4.625V threshold to detect brownout before MCU brownout detector activates. Use Value: Adds robust pre-failure warning layer, ensuring secure firmware rollback and tamper-log integrity during grid instability. |
Use Scenario: Wireless HVAC temperature/humidity sensor node powered by two AA alkaline cells, transmitting every 5 minutes. IC Role / Device Role / Timing Role: Generates periodic wake-up signal via WDI-grounded mode, turning on µP only during measurement and transmission. Use Value: Reduces average system current from µA to sub-100nA, extending battery life from 2 to >5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16058ATA46+ | Same 4.625V threshold and watchdog functionality, but open-drain RESET output | Requires external pull-up; better suited for level-shifting or wired-OR reset bus configurations | Select when interfacing to mixed-voltage systems (e.g., 1.8V µP with 3.3V supply monitoring) |
| TLV803EB46DBVR | 4.63V threshold, 2.5µA supply current, no watchdog, SOT-23-3 package | Lacks capacitor-adjustable timing and watchdog - suitable only for basic reset-only use cases | Choose for cost-sensitive, space-constrained designs where watchdog and programmable timeout are unnecessary |
Compared with MAX16056ATA46+, MAX16058ATA46+ offers identical supervision intelligence but different output drive architecture, while TLV803EB46DBVR trades nanoPower and watchdog capability for lower cost and smaller footprint in non-critical applications.
Availability
MAX16056ATA46+ is available at Aetrix Electronics and suitable for glucose monitors, patient monitoring systems, smart meters, and HVAC remote sensors requiring stable component supply across automotive and medical qualification lifecycles.
Supply support for MAX16056ATA46+ 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, high-reliability supervision in battery-critical medical, portable, and automotive applications - emphasizing nanoPower operation, factory-trimmed thresholds, and field-configurable timing.
FAQ
What is the factory-trimmed reset threshold voltage for MAX16056ATA46+?
The MAX16056ATA46+ has a factory-trimmed reset threshold of 4.625V (typical), with tolerance of ±1.5% at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed by Table 1 in the datasheet (suffix "46") and applies exclusively to the MAX16056ATA46+ variant - not to other suffixes or family members.
Does MAX16056ATA46+ include a watchdog timer?
Yes, MAX16056ATA46+ includes a fully functional watchdog timer with selectable normal or 128× extended timeout modes via the WDS pin. It uses the SWT pin for capacitor-based timing and WDI for feed pulses. This feature is present only in MAX16056/MAX16058 variants - MAX16057/MAX16059 lack watchdog capability.
What package type and pin count does MAX16056ATA46+ use?
MAX16056ATA46+ uses an 8-pin 3mm × 3mm TDFN-EP (Thin Dual Flat No-lead with Exposed Pad) package. Pinout is fixed per datasheet Figure 1: RESET (1), GND (2), SWT (3), MR (4), SRT (5), WDS (6), WDI (7), VCC (8). The exposed pad (EP) must be soldered to GND for thermal and electrical performance.
Can MAX16056ATA46+ operate down to 1.1V supply voltage?
Yes, MAX16056ATA46+ guarantees valid RESET output down to VCC = 1.1V, as specified in the Electrical Characteristics table. Below 1.1V, RESET remains asserted but sink capability degrades. This behavior is intrinsic to the MAX16056ATA46+ design and enables robust brownout detection in ultra-low-voltage battery systems.
What is the typical supply current of MAX16056ATA46+ at room temperature?
The typical supply current of MAX16056ATA46+ is 125nA at VCC = 1.8V and TA = +25°C, as stated in the Electrical Characteristics table. At VCC = 3.3V and TA = +25°C, it is 132nA; at VCC = 5.0V and TA = +25°C, it is 142nA. All values are measured with reset deasserted and no load.
MAX16056ATA46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- 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)
MAX16056ATA46+ FAQ
1.How can I place an order for MAX16056ATA46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16056ATA46+ 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 MAX16056ATA46+ reliable?
The price and inventory of MAX16056ATA46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16056ATA46+ is usually 5 days.
3.What payment methods are accepted for MAX16056ATA46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16056ATA46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16056ATA46+?
MAX16056ATA46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16056ATA46+ 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 MAX16056ATA46+?
For technical support, including MAX16056ATA46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16056ATA46+ requirements.
6.How does Aetrix verify that MAX16056ATA46+ is sourced from the original manufacturer or authorized distributors?
All MAX16056ATA46+ 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 MAX16056ATA46+ meets industry standards.
7.What is the process for return or replacement of MAX16056ATA46+?
All MAX16056ATA46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16056ATA46+, 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 MAX16056ATA46+ part is unused and in its original packaging.
Return procedure for MAX16056ATA46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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