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Analog Devices Inc./Maxim Integrated MAX16034LLB31+
- Part No.:
- MAX16034LLB31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16034LLB31+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,379
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Product details
Overview
The MAX16034LLB31+ from Maxim Integrated is a low-power microprocessor supervisory circuit with watchdog timer, power-fail comparator, and battery switchover functionality. It features a 3.08V factory-set reset threshold, 1.6s watchdog timeout, active-low push-pull RESET output, operates from 1.2V to 5.5V, and draws only 13µA quiescent current - enabling reliable power monitoring in portable battery-backed SRAM systems.
For engineers reviewing the MAX16034LLB31+ datasheet, MAX16034LLB31+ pinout, MAX16034LLB31+ application, or MAX16034LLB31+ equivalent, key selection criteria include its integrated watchdog input (WDI), precise 3.08V reset threshold tolerance (±0.07V), -40°C to +85°C operation, 10-pin µDFN package, and support for battery-backup mode with <2µA standby current.
Technical Context
The MAX16034LLB31+ implements a dedicated watchdog timer with 1.00–2.25s timeout range (typ. 1.65s), triggered by WDI edge transitions or sustained high/low states. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above 3.08V, MR deassertion, or WDI timeout - all while maintaining valid reset down to 1.2V supply.
It integrates an independent power-fail comparator (PFI threshold = 1.235V ±50mV) that drives PFO low on undervoltage detection, plus a battery switchover path with <4.6Ω VCC-to-OUT on-resistance at 2.5V and <0.2V dropout in backup mode - all within a single 2mm × 2mm 10-pin µDFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V to 3.15V (factory-set to 3.08V); ensures reliable μP reset during 3.3V rail brownout |
| Watchdog Timeout | 1.00–2.25s (typ. 1.65s); provides robust software execution monitoring without false triggers |
| Quiescent Current | 13µA at 2.8V; enables multi-year battery life in always-on backup applications |
| Operating Voltage | 1.2V to 5.5V; supports direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Reset Timeout Period | 140–280ms; guarantees sufficient μP initialization time after power recovery |
| Power-Fail Threshold | 1.235V ±50mV at PFI; allows accurate monitoring of secondary supplies via external resistor divider |
| Output Type | Active-low push-pull RESET and PFO; eliminates need for external pull-up resistors |
Pinout & Package
MAX16034LLB31+ is housed in a 2mm × 2mm, 10-pin µDFN package with exposed pad (pin 10 = GND EP), rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low during VCC undervoltage, WDI timeout, or power fail |
| 2 | CEIN | Chip-enable input; gated to CEOUT only when RESET is deasserted (not used in MAX16034) |
| 3 | PFI | Power-fail input; referenced to 1.235V internal comparator for external supply monitoring |
| 4 | GND | Ground reference for all analog and digital functions; connects to exposed thermal pad |
| 5 | WDI | Watchdog input; rising/falling edges reset internal timer; timeout triggers RESET pulse |
| 6 | PFO | Active-low push-pull power-fail output; goes low when PFI falls below 1.235V or VCC drops below VTH |
| 7 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and sources OUT during normal operation |
| 8 | OUT | Switched output; sourced from VCC normally, from BATT during backup mode (VCC < VTH and VCC < VBATT) |
| 9 | BATT | Backup battery input; automatically engages when VCC falls below reset threshold and VBATT > VCC + 40mV |
| 10 | NC | No connect; internal die bond wire unused; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Watchdog Timer | 1.65s typical timeout with edge-triggered reset clearance - prevents runaway code without software overhead |
| Battery Switchover Control | Automatic MOSFET-based switchover with <0.2V dropout and <2µA battery standby current - preserves backup runtime |
| Power-Fail Warning | Dedicated PFI/PFO path with 1.235V precision comparator and 4µs propagation delay - enables early system shutdown |
| Low-Voltage Reset Validity | RESET remains functional down to 1.2V VCC - ensures supervision during deep brownout conditions |
| Transient Immunity | Withstands negative VCC transients up to 25µs at 100mV overdrive - avoids spurious resets in noisy environments |
Applications
| Portable Medical Monitor | Industrial PLC Controller |
|---|---|
Use Scenario: Battery-powered handheld ECG device retaining SRAM configuration during AC loss or battery swap. IC Role / Device Role / Timing Role: Supervisory IC providing WDI-monitored reset, seamless BATT switchover to SRAM, and PFO-triggered data save before shutdown. Use Value: Guarantees zero-data-loss operation with <2µA battery drain in backup mode and 140ms minimum reset hold time for safe firmware restart. |
Use Scenario: DIN-rail mounted programmable logic controller requiring deterministic reset during 24V DC supply dips. IC Role / Device Role / Timing Role: μP supervisor asserting RESET on 24V-derived 3.3V rail undervoltage, while using PFI to monitor auxiliary 5V I/O supply. Use Value: Enables dual-supply fault detection with independent 1.235V PFI threshold and 3.08V VCC threshold - preventing partial system failure. |
| Retail POS Terminal | Set-Top Box with RTC Backup |
Use Scenario: Credit card terminal with nonvolatile SRAM storing transaction logs and cryptographic keys. IC Role / Device Role / Timing Role: Battery-backed supervisor delivering push-pull RESET to ARM Cortex-M, BATTON indicator (not present in MAX16034), and WDI-driven firmware health check. Use Value: Eliminates external reset IC and discrete watchdog, reducing BOM count while ensuring 1.65s timeout aligns with PCI PTS firmware watchdog requirements. |
Use Scenario: Cable set-top box maintaining real-time clock and channel lineup during brief AC outages. IC Role / Device Role / Timing Role: Supervisor managing switchover from main 3.3V rail to coin-cell battery for RTC/SRAM retention, with PFO signaling impending power loss to host SoC. Use Value: Achieves <13µA total system standby current with integrated switchover MOSFET - extending coin-cell life beyond 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 |
|---|---|---|---|
| MAX16034PLB31+ | Same functionality and pinout, but open-drain RESET/PFO outputs requiring external pull-ups | Suitable where bus-sharing or wired-OR reset topology is required | Select when interfacing with multiple devices on shared reset line or needing level translation |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no watchdog or battery switchover; 6-pin SOT-23 package | Limited to basic reset-only applications without backup or monitoring features | Choose only if system lacks battery backup, requires smaller footprint, and does not need WDI or PFI functionality |
Compared with MAX16034PLB31+, the MAX16034LLB31+ eliminates external pull-up components and simplifies layout; versus TPS3808G33DBVR, it adds critical battery switchover, watchdog, and dual-supply monitoring - making it uniquely suited for SRAM-retention-critical embedded systems.
Availability
MAX16034LLB31+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, retail POS terminals, and set-top boxes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16034LLB31+ 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 MAX16033–MAX16040 family was engineered specifically for space-constrained, battery-backed μP systems requiring integrated reset, watchdog, power-fail warning, and automatic battery switchover - all in sub-4mm² packages.
FAQ
What is the factory-set reset threshold voltage for MAX16034LLB31+?
The MAX16034LLB31+ has a factory-set reset threshold of 3.08V, with guaranteed range of 3.00V to 3.15V across -40°C to +85°C. This value is laser-trimmed during production and applies directly to the VCC supply monitoring function. The threshold remains stable with temperature, exhibiting less than 0.3% variation over the full operating range - critical for consistent 3.3V rail supervision in the MAX16034LLB31+.
Does MAX16034LLB31+ support battery backup for SRAM retention?
Yes, the MAX16034LLB31+ provides fully integrated battery switchover for SRAM retention. When VCC falls below 3.08V and VBATT exceeds VCC by >40mV, the internal MOSFET automatically connects BATT to OUT. In this mode, the MAX16034LLB31+ draws only 2µA from the battery (at 2.8V, -40°C to +85°C), enabling multi-year coin-cell operation while maintaining SRAM data integrity.
What is the watchdog timeout behavior of MAX16034LLB31+?
The MAX16034LLB31+ watchdog timer has a nominal timeout of 1.65s, with guaranteed range of 1.00s to 2.25s. It triggers a RESET pulse when WDI remains static (high or low) beyond this period. Each rising or falling edge on WDI clears the timer. After timeout, RESET asserts for ≥140ms - ensuring the μP completes full restart. This behavior is intrinsic to the MAX16034LLB31+ design and requires no external components.
Can MAX16034LLB31+ monitor a secondary power supply?
Yes, the MAX16034LLB31+ includes a dedicated power-fail comparator with PFI input referenced to a precise 1.235V internal threshold. By connecting a resistor divider from a secondary supply to PFI, users can configure trip points such as 5.0V, 12V, or negative rails. The resulting PFO signal asserts low on undervoltage, enabling host processor interrupt or controlled shutdown - a core capability of the MAX16034LLB31+.
What package type and pin count does MAX16034LLB31+ use?
The MAX16034LLB31+ uses a 2mm × 2mm, 10-pin µDFN package with exposed ground pad (EP). It is pin-compatible with other members of the MAX16033–MAX16040 family in the same package variant. Pin 10 is NC (no connect), and the exposed pad must be soldered to PCB ground for thermal and electrical performance - a defined mechanical specification of the MAX16034LLB31+ package.
MAX16034LLB31+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-µDFN (2x2)
MAX16034LLB31+ FAQ
1.How can I place an order for MAX16034LLB31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16034LLB31+ 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 MAX16034LLB31+ reliable?
The price and inventory of MAX16034LLB31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16034LLB31+ is usually 5 days.
3.What payment methods are accepted for MAX16034LLB31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16034LLB31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16034LLB31+?
MAX16034LLB31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16034LLB31+ 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 MAX16034LLB31+?
For technical support, including MAX16034LLB31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16034LLB31+ requirements.
6.How does Aetrix verify that MAX16034LLB31+ is sourced from the original manufacturer or authorized distributors?
All MAX16034LLB31+ 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 MAX16034LLB31+ meets industry standards.
7.What is the process for return or replacement of MAX16034LLB31+?
All MAX16034LLB31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16034LLB31+, 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 MAX16034LLB31+ part is unused and in its original packaging.
Return procedure for MAX16034LLB31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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