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Analog Devices Inc./Maxim Integrated MAX16039LLA46+T
- Part No.:
- MAX16039LLA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039LLA46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
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Product details
Overview
The MAX16039LLA46+T from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC with active-low push-pull reset, battery-on (BATTON) indicator, and precision 4.63V reset threshold. It monitors VCC supply voltage, provides automatic switchover to backup battery during brownout, asserts BATTON high in backup mode, and operates down to 1.2V supply. It is used in portable POS terminals and real-time clock backup circuits requiring low-quiescent-current supervision.
For engineers reviewing the MAX16039LLA46+T datasheet, MAX16039LLA46+T pinout, MAX16039LLA46+T application, or MAX16039LLA46+T equivalent, key selection criteria include its 4.63V factory-set reset threshold, 13µA quiescent current at 2.8V, 8-pin 2mm × 2mm μDFN package, BATTON push-pull output capability, and -40°C to +85°C industrial temperature range.
Technical Context
The MAX16039LLA46+T implements a precision bandgap-based reset generator with 4.63V ±0.125V threshold (VTH), 140ms minimum reset timeout (tRP), and active-low push-pull RESET output. Its internal MOSFET enables seamless VCC-to-BATT switchover when VCC falls below VTH and VBATT exceeds VCC by ≥40mV.
It integrates a dedicated BATTON output that drives high during battery-backup mode with 0.4V saturation at 3.2mA sink, and features independent power-fail comparator input (PFI) referenced to 1.235V with 1% hysteresis. All functions operate with supply current as low as 1µA in battery-backup mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-set, ±0.125V over -40°C to +85°C); ensures reliable reset assertion for 5V systems before undervoltage lockout. |
| Quiescent Supply Current | 13µA typical at VCC = 2.8V; enables multi-year operation on coin-cell batteries in always-on backup applications. |
| Battery-Backup Supply Current | 1µA at TA = +25°C, VBATT = 2.8V, VCC = 0V; minimizes battery drain during extended power loss. |
| Reset Timeout Period | 140ms minimum; guarantees microprocessor reset duration meets ARM/Cortex and legacy μP requirements. |
| BATTON Output Type | Active-high push-pull; delivers 3.2mA sink capability at 0.4V VOL, suitable for direct LED indication or external transistor base drive. |
| Operating Temperature Range | -40°C to +85°C; qualified for industrial and commercial embedded environments including POS and instrumentation. |
| Package | 8-pin μDFN (2mm × 2mm, 0.5mm pitch); supports high-density PCB layouts and automated assembly. |
Pinout & Package
MAX16039LLA46+T is housed in an 8-pin, 2mm × 2mm, 0.5mm-pitch μDFN package with exposed thermal pad (pin 8). Pin 1 is marked by dot; pin numbering follows standard counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low when VCC < 4.63V, remains low for ≥140ms after VCC recovery. |
| 2 | PFI | Power-fail input; referenced to 1.235V internal comparator; triggers PFO when voltage falls below threshold. |
| 3 | GND | Ground reference for all analog and digital circuitry; must be low-impedance connection to system ground plane. |
| 4 | MR | Manual-reset input; logic-low assertion forces RESET; includes internal 20kΩ pullup to VCC. |
| 5 | PFO | Active-low power-fail output; open-drain compatible; asserts low when PFI falls below 1.235V or VCC drops below VTH. |
| 6 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and sources OUT during normal operation. |
| 7 | OUT | Regulated output; sourced from VCC when VCC > VTH, switches to BATT when VCC < VTH and VBATT > VCC + 40mV. |
| 8 | BATT | Backup battery input; supplies OUT during brownout; accepts 2.1V–5.5V; no startup from BATT alone. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATTON) Indicator | Dedicated push-pull output that goes high only during valid battery-backup mode-enables unambiguous status monitoring without external logic. |
| Factory-Trimmed Reset Threshold | 4.63V ±0.125V over full temperature range-eliminates need for external resistor dividers and improves system accuracy vs. discrete solutions. |
| Ultra-Low Backup Current | 1µA typical battery supply current at +25°C-extends CR2032 life beyond 10 years in RTC backup applications. |
| VCC-to-BATT Switchover Hysteresis | 40mV built-in hysteresis prevents oscillation during slow VCC decay-ensures clean, glitch-free transition to backup power. |
| Power-Fail Comparator Independence | Dedicated 1.235V reference and PFI input-allows monitoring of secondary rails (e.g., 3.3V, 2.5V) without affecting primary reset function. |
Applications
| POS Terminal Battery Backup | Real-Time Clock (RTC) Hold-up |
|---|---|
|
Use Scenario: Maintains SRAM and RTC data during AC power interruption in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, automatic BATT switchover, and BATTON status flag. Use Value: Guarantees >10-year coin-cell lifetime with 1µA backup current and eliminates data corruption during brownout via 140ms reset hold time. |
Use Scenario: Preserves timekeeping and configuration registers in industrial RTC modules during main power loss. IC Role / Device Role / Timing Role: Battery-backup supervisor with precise 4.63V reset threshold and push-pull BATTON output. Use Value: Enables direct connection to RTC VBAT pin; BATTON signal confirms backup activation, allowing firmware to log power-loss events. |
| Industrial Controller Brownout Protection | Set-Top Box Memory Retention |
|
Use Scenario: Prevents erratic behavior in programmable logic controllers during unstable 24VDC supply conditions. IC Role / Device Role / Timing Role: System-level supervisor asserting RESET and disabling CE paths during undervoltage events. Use Value: Integrates chip-enable gating (via CEIN/CEOUT in MAX16033–MAX16036 variants) - not applicable to MAX16039LLA46+T; instead, uses BATTON for external control signaling. |
Use Scenario: Retains channel lineup and user preferences in consumer set-top boxes during brief grid interruptions. IC Role / Device Role / Timing Role: Low-power supervisory IC powering SRAM via OUT pin and signaling backup mode via BATTON. Use Value: 2mm × 2mm μDFN footprint saves board space; 13µA operating current reduces standby power budget impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16039PLA46+T | Same functionality and pinout, but features active-low open-drain RESET and PFO outputs instead of push-pull. | Suitable where wired-OR reset bus or level-shifting is required; incompatible with direct-drive loads needing push-pull sourcing. | Select MAX16039PLA46+T only if open-drain interface is explicitly needed; otherwise MAX16039LLA46+T provides simpler, more robust reset drive. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no BATTON output, no battery switchover, SOT-23-6 package. | Limited to single-supply monitoring; cannot replace MAX16039LLA46+T in battery-backup or dual-rail applications. | Use only for basic 3.3V supply monitoring without backup or status indication; not a functional substitute for MAX16039LLA46+T. |
Compared with MAX16039PLA46+T, the MAX16039LLA46+T offers superior drive strength and noise immunity via push-pull RESET, while TPS3808G33DBVR lacks both battery management and status signaling-making MAX16039LLA46+T uniquely suited for compact, self-contained backup supervision.
Availability
MAX16039LLA46+T is available at Aetrix Electronics and suitable for portable POS equipment, real-time clock backup systems, and industrial controller brownout protection requiring stable component supply, RoHS-compliant packaging, and long-lifecycle support.
Supply support for MAX16039LLA46+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 and mixed-signal ICs for power management, sensing, and connectivity in industrial, computing, and consumer applications.
The MAX16033–MAX16040 family was engineered specifically for ultra-low-power battery-backed memory retention and microprocessor supervision in space-constrained portable and industrial systems.
FAQ
What is the exact reset threshold voltage of the MAX16039LLA46+T?
The MAX16039LLA46+T has a factory-trimmed reset threshold of 4.63V, with guaranteed limits of 4.50V (min) and 4.75V (max) across -40°C to +85°C. This value is laser-trimmed during production and does not require external resistors-ensuring consistent performance without calibration overhead in the MAX16039LLA46+T design.
Does the MAX16039LLA46+T support battery switchover, and what is the switchover condition?
Yes, the MAX16039LLA46+T supports automatic battery switchover. It connects BATT to OUT when two conditions are met: VCC falls below the 4.63V reset threshold, and VBATT exceeds VCC by at least 40mV. This hysteresis prevents oscillation during slow VCC decay and is intrinsic to the MAX16039LLA46+T's internal MOSFET control logic.
What is the function and electrical specification of the BATTON pin on the MAX16039LLA46+T?
The BATTON pin on the MAX16039LLA46+T is a push-pull output that asserts high exclusively during valid battery-backup mode. It sinks 3.2mA with 0.4V saturation voltage and sources ~10µA from OUT in backup mode. This provides unambiguous status indication-unlike open-drain alternatives-and enables direct LED drive or external transistor control in the MAX16039LLA46+T implementation.
Can the MAX16039LLA46+T operate with supply voltages below 2.0V?
Yes, the MAX16039LLA46+T operates down to 1.2V VCC, and its RESET output remains valid (asserted low) even at 1.2V supply. This allows use in ultra-low-voltage systems such as energy-harvesting nodes or deep-sleep microcontrollers-maintaining supervision integrity where other supervisors fail, a core capability of the MAX16039LLA46+T.
Is the MAX16039LLA46+T pin-compatible with other devices in the MAX16033–MAX16040 family?
The MAX16039LLA46+T shares the same 8-pin μDFN package and pinout with MAX16037, MAX16038, MAX16040, and other 8-pin variants. However, feature sets differ: MAX16039LLA46+T includes BATTON but no watchdog or manual reset, unlike MAX16037/MAX16038. Pin compatibility exists, but functional substitution requires verification of required features per MAX16039LLA46+T datasheet.
MAX16039LLA46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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)
MAX16039LLA46+T FAQ
1.How can I place an order for MAX16039LLA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039LLA46+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 MAX16039LLA46+T reliable?
The price and inventory of MAX16039LLA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039LLA46+T is usually 5 days.
3.What payment methods are accepted for MAX16039LLA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039LLA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039LLA46+T?
MAX16039LLA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039LLA46+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 MAX16039LLA46+T?
For technical support, including MAX16039LLA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039LLA46+T requirements.
6.How does Aetrix verify that MAX16039LLA46+T is sourced from the original manufacturer or authorized distributors?
All MAX16039LLA46+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 MAX16039LLA46+T meets industry standards.
7.What is the process for return or replacement of MAX16039LLA46+T?
All MAX16039LLA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039LLA46+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 MAX16039LLA46+T part is unused and in its original packaging.
Return procedure for MAX16039LLA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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