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Analog Devices Inc./Maxim Integrated MAX16039LLA26/GG8
- Part No.:
- MAX16039LLA26/GG8
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039LLA26/GG8.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,483
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Product details
Overview
MAX16039LLA26/GG8 from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC for microprocessor systems, featuring a factory-set 2.63V reset threshold, active-low push-pull RESET output, battery-on (BATTON) indicator, and power-fail warning (PFI/PFO). It operates from 1.2V to 5.5V, draws only 13µA quiescent current, and supports SRAM backup in portable POS terminals and industrial controllers.
For engineers reviewing the MAX16039LLA26/GG8 datasheet, MAX16039LLA26/GG8 pinout, MAX16039LLA26/GG8 application, or MAX16039LLA26/GG8 equivalent, key selection criteria include its 2.63V reset threshold accuracy, BATTON push-pull output capability, 140ms minimum reset timeout, and 2mm × 2mm 8-pin μDFN package with -40°C to +85°C operation.
Technical Context
The MAX16039LLA26/GG8 implements a precision reset generator with internal 2.63V threshold (±70mV over temperature), independent power-fail comparator referenced to 1.235V, and integrated battery switchover MOSFET with <4.6Ω VCC-to-OUT on-resistance at 2.5V. Its BATTON output asserts high during battery-backup mode and sinks 3.2mA at 0.4V saturation.
This variant belongs to the MAX16035–MAX16039 subgroup, omitting manual-reset (MR), watchdog (WDI), and chip-enable (CEIN/CEOUT) functions but retaining PFI monitoring, RESET assertion on VCC fall/battery switchover, and active-low push-pull RESET output - all optimized for space-constrained, low-power SRAM retention applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory-trimmed, ±70mV over -40°C to +85°C) - ensures reliable reset initiation for 2.5V logic rails |
| Supply Current | 13µA typical at 2.8V - enables multi-year battery life in backup mode |
| Reset Timeout | 140ms minimum - meets JEDEC JESD72B brownout recovery timing for μP initialization |
| Output Type | Active-low push-pull RESET - eliminates external pull-up resistor, drives directly into μP reset pin |
| Package | 2mm × 2mm, 8-pin μDFN - fits high-density PCB layouts in handheld and embedded controllers |
| Battery Switchover | Automatic VCC-to-BATT transition when VCC < VTH and VCC < VBATT − 40mV - prevents memory corruption during brownout |
| BATTON Output | Push-pull high-state indicator during backup - provides direct visual/status signal without external level-shifting |
Pinout & Package
MAX16039LLA26/GG8 uses an 8-pin, 2mm × 2mm μDFN package with wettable flanks (GG8 suffix), specified for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low reset output | Push-pull driver; asserts low when VCC < 2.63V, remains low ≥140ms after VCC rise - directly interfaces μP reset input |
| 2 (PFI) | Power-fail input | Monitors external voltage divider; triggers PFO low when input falls below 1.235V - enables early power-loss detection |
| 3 (GND) | Ground reference | Common return for VCC, BATT, and signal paths - must be low-impedance connection to avoid reset instability |
| 4 (BATTON) | Battery-on status output | Push-pull high during battery backup - drives LEDs or base of external pass transistor without pull-up |
| 5 (PFO) | Active-low power-fail output | Push-pull output asserted low on PFI trip or VCC brownout - connects to μP NMI or interrupt pin |
| 6 (VCC) | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT until VCC drops below reset threshold |
| 7 (OUT) | System power output | Switches between VCC and BATT; delivers up to 200mA from VCC, >20mA from battery - powers SRAM directly |
| 8 (BATT) | Backup battery input | Accepts 0V–6V; activates switchover when VBATT > VCC + 40mV - supports coin cells, supercaps, or Li-ion backups |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63V reset threshold | Factory-trimmed ±70mV tolerance over full temperature range - eliminates need for external resistor networks |
| 13µA quiescent supply current | Enables >5-year coin-cell life in always-on backup mode - critical for unattended industrial logging devices |
| Integrated battery switchover MOSFET | VCC-to-OUT RON = 4.6Ω at 2.5V/25mA - minimizes voltage drop and heat generation during backup |
| Active-low push-pull RESET and PFO | No external pull-ups required - reduces BOM count and PCB area in space-constrained designs |
| BATTON push-pull status output | Sinks 3.2mA at 0.4V saturation - directly drives status LEDs or enables external backup regulators |
Applications
| Portable POS Terminals | Industrial Programmable Controllers |
|---|---|
Use Scenario: Battery-backed SRAM retains transaction logs and configuration data during AC power loss or battery swap in handheld payment terminals. IC Role / Device Role / Timing Role: MAX16039LLA26/GG8 monitors main 3.3V rail, asserts RESET to halt μP execution, switches OUT to coin cell, and signals backup mode via BATTON. Use Value: Prevents data corruption during 100ms–500ms brownouts; 13µA quiescent current extends CR2032 life beyond 3 years. | Use Scenario: PLC retains I/O state and program memory during factory floor power fluctuations or emergency shutdowns. IC Role / Device Role / Timing Role: MAX16039LLA26/GG8 detects 24V DC supply sag using PFI divider, triggers PFO interrupt, and sustains SRAM via supercap-backed OUT rail. Use Value: 140ms reset timeout aligns with IEC 61000-4-29 immunity requirements; 2.63V threshold matches 2.5V FPGA configuration voltage. |
| Set-Top Box Memory Backup | Real-Time Clock Modules |
Use Scenario: STB preserves channel lineup, parental controls, and EPG data across unplanned power cycles in consumer living rooms. IC Role / Device Role / Timing Role: MAX16039LLA26/GG8 watches 3.3V system rail, initiates clean μP reset on dropout, and maintains RTC SRAM via BATT-fed OUT. Use Value: Push-pull BATTON output drives status LED without resistor; 2mm × 2mm footprint saves space near dense SoC packages. | Use Scenario: RTC module retains time/date and alarm settings during main power removal in smart meters and HVAC controllers. IC Role / Device Role / Timing Role: MAX16039LLA26/GG8 monitors 3.0V RTC supply, asserts RESET to freeze counter registers, and powers RTC core from backup cell via OUT. Use Value: 2.63V reset threshold ensures fail-safe holdover before 3.0V rail collapses; 1.2V minimum operating voltage supports ultra-low-power RTC ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16039PLA26/GG8 | Same 2.63V threshold and 8-pin μDFN, but open-drain RESET and PFO outputs | Requires external pull-ups; better suited for wired-OR interrupt buses or level translation | Select when interfacing with legacy μPs requiring open-drain reset signaling or shared interrupt lines |
| TPS3808G12DBVR | 2.63V fixed threshold, SOT-23-6 package, 1.8µA quiescent current, no BATTON or PFI/PFO | Lacks battery switchover and power-fail warning; only provides basic reset function | Select when only reset supervision is needed and board space allows SOT-23; not suitable for SRAM backup systems |
Compared with MAX16039PLA26/GG8, the MAX16039LLA26/GG8 eliminates external pull-ups and simplifies layout; versus TPS3808G12DBVR, it adds critical battery management and power-fail alerting - essential for memory-retention systems where data integrity depends on coordinated switchover and status signaling.
Availability
MAX16039LLA26/GG8 is available at Aetrix Electronics and suitable for portable POS terminals, industrial programmable controllers, set-top box memory backup, and real-time clock modules requiring stable component supply and long-term manufacturability.
Supply support for MAX16039LLA26/GG8 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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, computing, and communications markets.
The MAX16033–MAX16040 family targets low-power battery-backed memory supervision, delivering integrated reset, switchover, and status signaling in minimal 2mm × 2mm packages for space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX16039LLA26/GG8?
The MAX16039LLA26/GG8 has a factory-trimmed reset threshold of 2.63V, with guaranteed limits of 2.55V (min) and 2.70V (max) over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and applies specifically to the "L26" suffix variant - confirmed in the Electrical Characteristics table under RESET OUTPUT section of the official datasheet.
Does the MAX16039LLA26/GG8 support battery switchover, and what is its on-resistance?
Yes, the MAX16039LLA26/GG8 automatically switches OUT from VCC to BATT when VCC falls below the 2.63V reset threshold and VBATT exceeds VCC by at least 40mV. Its VCC-to-OUT on-resistance is 4.6Ω maximum at 2.5V input and 25mA load, ensuring minimal voltage drop during primary supply operation - verified in the Electrical Characteristics table under VCC to OUT On-Resistance parameter.
What is the function of the BATTON pin on the MAX16039LLA26/GG8?
The BATTON pin on the MAX16039LLA26/GG8 is a push-pull output that asserts high during battery-backup mode (i.e., when VCC is below threshold and BATT is active). It sinks 3.2mA at 0.4V saturation and can drive status LEDs or base-emitter junctions of external pass transistors - detailed in the Pin Description and BATTON Indicator sections of the MAX16033–MAX16040 datasheet.
Can the MAX16039LLA26/GG8 monitor a secondary power supply?
No, the MAX16039LLA26/GG8 does not include the RESETIN input function - that feature is exclusive to MAX16036/MAX16040 variants. It provides only PFI-based power-fail monitoring (with 1.235V internal reference) and fixed 2.63V VCC supervision. For secondary supply monitoring, select MAX16040LLA26/GG8 instead, which adds the adjustable RESETIN comparator.
What package type and dimensions does the MAX16039LLA26/GG8 use?
The MAX16039LLA26/GG8 uses an 8-pin, 2mm × 2mm μDFN package with wettable flanks (GG8 suffix), specified for operation from -40°C to +85°C. Its pin pitch is 0.5mm, and it features exposed paddle thermal pad - fully documented in the Pin Configurations section and Ordering Information table of the MAX16033–MAX16040 datasheet.
MAX16039LLA26/GG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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:
- 8-µDFN (2x2)
MAX16039LLA26/GG8 FAQ
1.How can I place an order for MAX16039LLA26/GG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039LLA26/GG8 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 MAX16039LLA26/GG8 reliable?
The price and inventory of MAX16039LLA26/GG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039LLA26/GG8 is usually 5 days.
3.What payment methods are accepted for MAX16039LLA26/GG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039LLA26/GG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039LLA26/GG8?
MAX16039LLA26/GG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039LLA26/GG8 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 MAX16039LLA26/GG8?
For technical support, including MAX16039LLA26/GG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039LLA26/GG8 requirements.
6.How does Aetrix verify that MAX16039LLA26/GG8 is sourced from the original manufacturer or authorized distributors?
All MAX16039LLA26/GG8 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 MAX16039LLA26/GG8 meets industry standards.
7.What is the process for return or replacement of MAX16039LLA26/GG8?
All MAX16039LLA26/GG8 units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039LLA26/GG8, 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 MAX16039LLA26/GG8 part is unused and in its original packaging.
Return procedure for MAX16039LLA26/GG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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