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Analog Devices Inc./Maxim Integrated MAX16039PLA46+T
- Part No.:
- MAX16039PLA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039PLA46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
The MAX16039PLA46+T from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC with active-low push-pull RESET, battery-on (BATTON) indicator, and 4.63V factory-set reset threshold. It monitors VCC (1.2V–5.5V), asserts RESET during brownout or manual trigger, switches OUT to BATT when VCC < VTH and VCC < VBATT, and sinks ≤0.4V at 3.2mA on BATTON. It serves in portable equipment requiring nonvolatile SRAM retention during power loss.
For engineers reviewing the MAX16039PLA46+T datasheet, MAX16039PLA46+T pinout, MAX16039PLA46+T application, or MAX16039PLA46+T equivalent, key selection criteria include its 4.63V reset threshold accuracy (±0.13V), 13µA quiescent supply current at 2.8V, 140ms minimum reset timeout, BATTON push-pull output capability, and 8-pin 2mm × 2mm μDFN package with -40°C to +85°C operation.
Technical Context
This device integrates a precision reset generator, battery switchover MOSFET control, and BATTON status indicator in a single 8-pin μDFN. Its reset circuit uses a trimmed bandgap reference for ±1.5% VTH tolerance over temperature, and the BATTON output is internally driven high only when VCC falls below 4.63V and VBATT exceeds VCC by ≥40mV.
The internal switchover path features low on-resistance (3.1Ω typical at VCC = 4.75V, IOUT = 150mA) and supports up to 200mA from VCC or battery backup. No external components are required for basic reset or battery indication-only decoupling capacitors and optional PFI resistive dividers for power-fail warning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-trimmed, ±0.13V max deviation over -40°C to +85°C) |
| Supply Current (ICC) | 13µA typical at VCC = 2.8V; enables ultra-low-power battery backup mode |
| Reset Timeout Period | 140ms minimum; ensures µP completes full initialization before release |
| BATTON Output Type | Active-high push-pull; drives high during battery backup, sinks 3.2mA @ ≤0.4V |
| VCC-to-OUT On-Resistance | 3.1Ω typical at VCC = 4.75V, IOUT = 150mA; minimizes voltage drop under load |
| Operating Temperature Range | -40°C to +85°C; fully specified for industrial and portable applications |
| Package | 8-pin µDFN (2mm × 2mm); surface-mount compatible with high-density PCB layouts |
Pinout & Package
Package: 8-pin µDFN (2mm × 2mm, 0.5mm pitch), exposed pad, RoHS-compliant, tape-and-reel (T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low when VCC < 4.63V, remains low ≥140ms after VCC recovery; directly drives µP reset input |
| 2 - PFI | Power-fail comparator input | Monitors external voltage divider; triggers PFO low when VPFI < 1.235V (±1% hysteresis) |
| 3 - GND | Ground reference | Common return for all analog/digital functions; connects to exposed thermal pad |
| 4 - MR | Manual-reset input | Logic-low assertion forces RESET; includes 20kΩ internal pullup; debounced internally |
| 5 - PFO | Active-low power-fail output | Push-pull output; goes low on PFI trip or VCC brownout; signals µP NMI or interrupt |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation |
| 7 - OUT | Regulated system output | Switches between VCC and BATT; sources up to 200mA; powers SRAM or real-time clock |
| 8 - BATT | Backup battery input | Connects to lithium coin cell or supercap; activates switchover when VCC < VTH and VBATT > VCC + 40mV |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.63V reset threshold | Eliminates external resistor network; guarantees ±1.5% accuracy over full temperature range |
| Battery-on (BATTON) indicator | Push-pull output asserted high only during valid battery backup; enables LED status or external pass transistor control |
| Ultra-low 13µA supply current | Extends primary battery life in always-on portable systems; reduces thermal load in sealed enclosures |
| Integrated VCC/BATT switchover MOSFET | On-resistance ≤3.1Ω ensures <100mV dropout at 150mA; no external FET or diode required |
| 140ms minimum reset timeout | Guarantees µP reset hold time meets ARM Cortex-M and legacy 8051 timing requirements |
| Power-fail comparator with PFI/PFO | Independent 1.235V reference enables monitoring of secondary rails (e.g., 3.3V, 2.5V) via resistive divider |
Applications
| Portable Medical Monitors | Industrial PLC Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG monitor retains last 72 hours of waveform data in SRAM during AC power loss or battery swap. IC Role / Device Role: MAX16039PLA46+T provides VCC brownout detection, automatic BATT switchover to coin cell, and BATTON-driven LED alert. Use Value: Ensures zero data loss during 200ms–5s power interruption; 13µA ICC extends 3V CR2032 life to >5 years in standby. |
Use Scenario: DIN-rail mounted PLC maintains RTC and configuration EEPROM state during 100ms–2s factory line voltage sags. IC Role / Device Role: MAX16039PLA46+T asserts RESET to halt CPU execution, switches OUT to backup supercap, and signals switchover via BATTON. Use Value: Prevents corrupted writes to flash during brownout; 3.1Ω RON limits voltage droop to <150mV at 100mA load. |
| Retail Point-of-Sale Terminals | Smart Energy Meters |
Use Scenario: POS terminal preserves transaction buffer and secure key storage in SRAM during unexpected AC outage or battery depletion. IC Role / Device Role: MAX16039PLA46+T monitors 5V rail, triggers RESET before VCC drops below 4.63V, and enables BATT-backed SRAM write completion. Use Value: Guarantees atomic commit of last sale record; 140ms tRP satisfies Intel x86-compatible reset timing specs. |
Use Scenario: Electricity meter retains time-of-use tariff data and tamper logs in battery-backed SRAM during grid blackouts lasting minutes to hours. IC Role / Device Role: MAX16039PLA46+T detects 3.3V supply collapse, asserts RESET, routes BATT to SRAM/RTC, and illuminates maintenance LED via BATTON. Use Value: Meets IEC 62053-21 data retention requirement; 4.63V VTH aligns with 5V LDO dropout margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16039PLA31+T | Factory-set 3.08V reset threshold (vs. 4.63V); identical pinout, package, and BATTON functionality | Suitable for 3.3V systems with tighter brownout margins; not interchangeable without board-level voltage validation | Select when monitoring 3.3V rails where 4.63V threshold would cause premature reset |
| TPS3808G33DBVR | 3.3V fixed reset threshold; open-drain RESET; no BATTON output or battery switchover; SOT-23-6 package | Lacks battery management; requires external diode/FET for backup; suited for simple reset-only designs | Choose only if battery backup is handled separately and space-constrained layout favors SOT-23 |
Compared with MAX16039PLA31+T, the MAX16039PLA46+T provides higher reset threshold for 5V systems and avoids false triggers during nominal 3.3V rail ripple; compared with TPS3808G33DBVR, it delivers integrated battery switchover and status signaling-reducing BOM count by ≥3 components.
Availability
MAX16039PLA46+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC data loggers, retail point-of-sale terminals, and smart energy meters requiring stable component supply across extended production lifecycles.
Supply support for MAX16039PLA46+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, sensing, and interface applications, with emphasis on reliability and integration for industrial and portable systems.
The MAX16033–MAX16040 family was engineered specifically for low-power battery-backed memory retention in space-constrained µP systems, combining reset supervision, power-fail warning, and seamless VCC/BATT switchover in sub-4mm² packages.
FAQ
What is the exact reset threshold voltage of the MAX16039PLA46+T?
The MAX16039PLA46+T has a factory-trimmed reset threshold of 4.63V, with guaranteed limits of 4.50V (min) and 4.75V (max) over the full -40°C to +85°C operating range. This value is laser-trimmed during production and does not require external resistor calibration. The MAX16039PLA46+T datasheet specifies ±1.5% tolerance relative to nominal, making it suitable for 5V systems where brownout must occur only below 4.5V.
Does the MAX16039PLA46+T support battery switchover without external components?
Yes, the MAX16039PLA46+T integrates the battery switchover MOSFET and control logic. When VCC falls below 4.63V and VBATT exceeds VCC by ≥40mV, the device automatically connects BATT to OUT without requiring external diodes, FETs, or controllers. Only a 0.1µF decoupling capacitor on VCC and optional PFI divider resistors are needed for basic operation. The MAX16039PLA46+T's internal architecture eliminates typical 0.3–0.7V diode drops, preserving backup voltage headroom.
What is the function and drive strength of the BATTON pin on the MAX16039PLA46+T?
The BATTON pin on the MAX16039PLA46+T is an active-high push-pull output that asserts high exclusively during valid battery backup mode (i.e., when VCC < 4.63V and VBATT > VCC + 40mV). It sinks 3.2mA while maintaining ≤0.4V saturation voltage, enabling direct LED driving or base biasing of external PNP pass transistors. In backup mode, BATTON also sources ~10µA from OUT, allowing low-current status signaling without loading the backup source. This behavior is intrinsic to the MAX16039PLA46+T design and requires no configuration.
Can the MAX16039PLA46+T be used with a supercapacitor instead of a battery?
Yes, the MAX16039PLA46+T supports supercapacitor backup sources. Its BATT input accepts voltages up to 5.5V and features 40mV hysteresis to prevent oscillation during slow VCC decay. When paired with a 0.47F supercap charged to 5V via a series diode, the MAX16039PLA46+T delivers >30 seconds of SRAM retention at 100mA load. No firmware or external circuit changes are needed-the MAX16039PLA46+T operates identically with Li coin cells, alkaline batteries, or supercaps.
What are the absolute maximum ratings for VCC and BATT on the MAX16039PLA46+T?
The MAX16039PLA46+T specifies absolute maximum ratings of -0.3V to +6V for VCC and BATT pins (with respect to GND). Continuous VCC supply current is rated at 250mA, and peak VCC current is 1A for ≤10µs. BATT continuous current is 40mA, with 250mA peak rating. Exceeding these limits may cause permanent damage. These values are defined in the MAX16039PLA46+T Absolute Maximum Ratings table and apply regardless of operating mode-including battery backup or reset assertion.
MAX16039PLA46+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:
- Open Drain or Open Collector
- 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)
MAX16039PLA46+T FAQ
1.How can I place an order for MAX16039PLA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039PLA46+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 MAX16039PLA46+T reliable?
The price and inventory of MAX16039PLA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039PLA46+T is usually 5 days.
3.What payment methods are accepted for MAX16039PLA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039PLA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039PLA46+T?
MAX16039PLA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039PLA46+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 MAX16039PLA46+T?
For technical support, including MAX16039PLA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039PLA46+T requirements.
6.How does Aetrix verify that MAX16039PLA46+T is sourced from the original manufacturer or authorized distributors?
All MAX16039PLA46+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 MAX16039PLA46+T meets industry standards.
7.What is the process for return or replacement of MAX16039PLA46+T?
All MAX16039PLA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039PLA46+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 MAX16039PLA46+T part is unused and in its original packaging.
Return procedure for MAX16039PLA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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