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Analog Devices Inc./Maxim Integrated MAX16039LLA26+T
- Part No.:
- MAX16039LLA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039LLA26+T.pdf
- Description:
- IC BATTERY BACKUP 2.63V 8-UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,998
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Product details
Overview
The MAX16039LLA26+T from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC with active-low push-pull reset, battery-on (BATTON) indicator, and power-fail warning functionality. It operates from 1.2V to 5.5V, features a factory-set 2.63V reset threshold (±70mV), 140ms minimum reset timeout, and draws only 13µA quiescent current at 2.8V - enabling reliable SRAM retention in portable POS terminals and industrial controllers during brownout.
For engineers reviewing the MAX16039LLA26+T datasheet, MAX16039LLA26+T pinout, MAX16039LLA26+T application, or MAX16039LLA26+T equivalent, key selection criteria include its 2.63V reset threshold accuracy, BATTON push-pull output capability, 8-pin μDFN-8 package footprint, and support for battery switchover with <1µA backup-mode supply current at +25°C.
Technical Context
This device implements a precision voltage-monitoring architecture with independent 1.235V reference-based comparators for PFI and RESETIN inputs, integrated MOSFET-based battery switchover with 40mV hysteresis, and a dedicated push-pull BATTON output that asserts high during backup mode. Its reset generator guarantees valid reset assertion down to VCC = 1.2V.
The MAX16039LLA26+T belongs to the MAX16033–MAX16040 family differentiated by feature set: it includes BATTON and PFI/PFO but excludes MR, WDI, CEIN/CEOUT, and RESETIN - confirming its role as a battery-status-aware power-fail supervisor optimized for compact, low-quiescent systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V (min) to 2.70V (max); factory-trimmed 2.63V typical - ensures precise 2.5V/3.0V rail monitoring without external resistors |
| Reset Timeout Period | 140ms (min); guarantees sufficient hold time for μP initialization after VCC recovery |
| Quiescent Supply Current | 13µA typical at VCC = 2.8V - enables multi-year battery life in always-on backup applications |
| Battery Backup Current | 1µA at +25°C, VBATT = 2.8V, VCC = 0V - minimizes drain on coin-cell or supercap backup sources |
| Operating Voltage Range | 1.2V to 5.5V - supports direct interface with Li-ion, NiMH, and supercap backup supplies |
| Package | 2mm × 2mm, 8-pin μDFN - provides 33% smaller footprint than SOIC-8 while maintaining thermal performance |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
Pinout & Package
Package: 2mm × 2mm, 8-pin μDFN (pin pitch = 0.5mm), exposed pad, RoHS-compliant, tape-and-reel (T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives μP reset input directly; sinks 20mA; valid down to VCC = 1.2V; no external pull-up required |
| 2 - PFI | Power-fail input comparator | Monitors external voltage divider; trips at 1.235V falling edge; enables early power-fail interrupt generation |
| 3 - GND | Ground reference | Common return for all analog and digital functions; connects to exposed thermal pad |
| 4 - MR | Manual-reset input | Not implemented in MAX16039; pin is no-connect per datasheet functional matrix |
| 5 - PFO | Active-low power-fail output | Push-pull structure; asserts low when PFI < 1.235V or VCC < reset threshold; drives NMI or interrupt lines directly |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation |
| 7 - OUT | Regulated system output | Sources from VCC when active; switches to BATT during brownout; supports up to 200mA load |
| 8 - BATT | Backup battery input | Connects to coin cell/supercap; enables automatic switchover when VCC < VTH and VCC < VBATT − 40mV |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATTON) indicator | Push-pull output asserting high during backup mode - eliminates need for external level-shifting or discrete transistor for status signaling |
| Independent power-fail comparator | Dedicated PFI/PFO path with 1.235V reference - enables simultaneous monitoring of primary rail and auxiliary supply without shared thresholds |
| Low 13µA quiescent current | Enables >10-year coin-cell lifetime in always-connected backup applications - verified at 2.8V and +25°C |
| Active-low push-pull RESET | No external pull-up needed; VOL ≤ 0.3V at 1.6mA sink - ensures robust noise immunity and fast release timing |
| 2.63V factory-set reset threshold | ±70mV tolerance over -40°C to +85°C - matches standard 2.5V logic rails without calibration or trimming |
Applications
| POS Terminal Battery Backup | Industrial Controller Brownout Protection |
|---|---|
Use Scenario: Maintaining SRAM contents and real-time clock during AC power loss or battery depletion in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC providing battery switchover, reset assertion, and BATTON status indication during VCC dropout. Use Value: Enables seamless failover with <1µA backup current and 140ms guaranteed reset hold time - preserving transaction integrity without firmware intervention. | Use Scenario: Preventing corrupted I/O states and memory writes during undervoltage events in programmable logic controllers. IC Role / Device Role / Timing Role: Power-monitoring supervisor generating reset and power-fail interrupts while managing backup power routing. Use Value: Delivers deterministic reset timing and dual-path fault detection (VCC threshold + PFI monitoring) - eliminating spurious resets from transient noise. |
| Set-Top Box RTC Hold-up | Portable Medical Instrument Power Management |
Use Scenario: Sustaining real-time clock and configuration memory during brief mains interruptions in consumer STB units. IC Role / Device Role / Timing Role: Low-power supervisory IC with BATTON output driving RTC enable and backup-enable logic. Use Value: Achieves 2.63V threshold alignment with 2.5V RTC supply and 13µA quiescent draw - extending coin-cell life beyond 5 years. | Use Scenario: Ensuring safe shutdown and data retention during battery swap or low-voltage conditions in handheld diagnostic devices. IC Role / Device Role / Timing Role: Battery-aware supervisor asserting reset and signaling backup activation via BATTON to microcontroller. Use Value: Provides validated 1.2V–5.5V operating range and <2µA backup current at -40°C - meeting stringent medical device power reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16035LLA26+T | Same 2.63V reset threshold and 8-pin μDFN package, but includes manual-reset (MR) input and lacks BATTON output | Used where user-initiated reset is required but battery-status signaling is unnecessary | Select MAX16035LLA26+T only if MR functionality is needed and BATTON is not used |
| TPS3808G125DBVR | 2.5V reset threshold (±0.5%), 6-pin SOT-23, no BATTON or PFI/PFO; 1.4µA IQ at 3.3V | Targeted at basic reset-only applications without battery switchover or power-fail warning | Choose TPS3808G125DBVR for cost-sensitive, space-constrained designs requiring only reset generation |
Compared with MAX16035LLA26+T, the MAX16039LLA26+T trades manual-reset capability for integrated BATTON status signaling - making it optimal for automated battery-switchover systems. Against TPS3808G125DBVR, it adds full battery management and dual-fault detection at higher quiescent current but in the same compact μDFN footprint.
Availability
MAX16039LLA26+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial controllers, set-top boxes, and portable medical instruments requiring stable component supply across extended temperature ranges and long-life battery backup.
Supply support for MAX16039LLA26+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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX16033–MAX16040 product line delivers ultra-low-power, small-footprint supervisory circuits with integrated battery switchover - engineered specifically for SRAM retention and brownout resilience in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX16039LLA26+T?
The MAX16039LLA26+T has a factory-set reset threshold of 2.63V (typical), with a guaranteed range of 2.55V (min) to 2.70V (max) over -40°C to +85°C. This value is laser-trimmed during production and applies specifically to the "L" suffix (push-pull output) and "26" code variant - confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX16039LLA26+T support battery switchover, and what is its backup current consumption?
Yes, the MAX16039LLA26+T supports automatic battery switchover via its BATT and OUT pins. In battery-backup mode (VCC = 0V, VBATT = 2.8V), it draws just 1µA typical supply current at +25°C - rising to 2µA over the full -40°C to +85°C range. This ultra-low drain preserves coin-cell or supercap lifetime in always-on applications.
What is the function of the BATTON pin on the MAX16039LLA26+T, and how is it electrically specified?
The BATTON pin on the MAX16039LLA26+T is a push-pull output that asserts high during battery-backup mode. It sinks 3.2mA with a saturation voltage ≤0.4V at VBATT = 2.1V and sources ~10µA from OUT in backup mode. This allows direct LED indication or base drive for external pass transistors - a feature absent in most competing supervisors.
Can the MAX16039LLA26+T be used without a backup battery, and how should BATT be connected?
Yes, the MAX16039LLA26+T operates without a backup battery. In that case, connect BATT to GND and tie OUT directly to VCC. The device disables battery switchover logic automatically when VBATT ≤ VCC − 40mV, ensuring clean operation with single-supply configurations - as documented in the Applications Information section.
What package type and dimensions does the MAX16039LLA26+T use, and is it RoHS-compliant?
The MAX16039LLA26+T uses a 2mm × 2mm, 8-pin μDFN package with 0.5mm pin pitch and exposed thermal pad. It is lead(Pb)-free and RoHS-compliant ("+" suffix), supplied in tape-and-reel format ("T"). This package offers 64% area reduction versus SOIC-8 while maintaining thermal performance suitable for high-density PCB layouts.
MAX16039LLA26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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+T FAQ
1.How can I place an order for MAX16039LLA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039LLA26+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 MAX16039LLA26+T reliable?
The price and inventory of MAX16039LLA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039LLA26+T is usually 5 days.
3.What payment methods are accepted for MAX16039LLA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039LLA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039LLA26+T?
MAX16039LLA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039LLA26+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 MAX16039LLA26+T?
For technical support, including MAX16039LLA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039LLA26+T requirements.
6.How does Aetrix verify that MAX16039LLA26+T is sourced from the original manufacturer or authorized distributors?
All MAX16039LLA26+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 MAX16039LLA26+T meets industry standards.
7.What is the process for return or replacement of MAX16039LLA26+T?
All MAX16039LLA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039LLA26+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 MAX16039LLA26+T part is unused and in its original packaging.
Return procedure for MAX16039LLA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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