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Analog Devices Inc./Maxim Integrated MAX16039PLA26+T
- Part No.:
- MAX16039PLA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039PLA26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,228
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Product details
Overview
The MAX16039PLA26+T from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC with active-low push-pull reset, battery-on (BATTON) indicator, and 2.63V factory-set reset threshold. It monitors VCC (1.2V–5.5V), provides automatic switchover to backup battery during brownout, asserts BATTON high in backup mode, and delivers 140ms minimum reset timeout. It is used in portable POS terminals and real-time clock backup circuits requiring low-quiescent-current supervision.
For engineers reviewing the MAX16039PLA26+T datasheet, MAX16039PLA26+T pinout, MAX16039PLA26+T application, or MAX16039PLA26+T equivalent, key selection criteria include its 2.63V reset threshold, 8-pin μDFN-8 package, BATTON push-pull output capability, -40°C to +85°C operation, and compatibility with 2.5V/3.0V/3.3V/5.0V supply rails.
Technical Context
The MAX16039PLA26+T implements a precision voltage-monitoring architecture with a factory-trimmed 2.63V reset threshold (±0.07V tolerance), independent power-fail comparator referenced to 1.235V, and integrated MOSFET-based battery switchover with 40mV hysteresis. Its BATTON output is a push-pull driver that sources ~10µA in backup mode and sinks 3.2mA at 0.4V saturation.
This device belongs to the MAX16033–MAX16040 family of low-power supervisors optimized for SRAM backup. Unlike variants with manual reset (MR) or watchdog (WDI), the MAX16039PLA26+T specifically integrates BATTON functionality and uses the 8-pin μDFN package-excluding CEIN, CEOUT, MR, WDI, and RESETIN pins found in larger variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V (min) / 2.63V (typ) / 2.70V (max); ensures reliable reset assertion for 2.5V systems with margin against supply droop |
| Supply Voltage Range | 1.2V to 5.5V; supports operation down to ultra-low-voltage brownout detection and full 5V logic compatibility |
| Quiescent Current | 13µA (typ) at 2.8V; enables multi-year battery life in always-on backup applications |
| Battery Backup Current | 2µA (max, -40°C to +85°C); minimizes drain on coin-cell batteries during extended VCC loss |
| Reset Timeout Period | 140ms (min); guarantees sufficient processor initialization time after power recovery |
| BATTON Output Type | Active-high push-pull; drives LEDs or external pass transistors without pull-up resistors |
| Operating Temperature | -40°C to +85°C; qualified for industrial and portable equipment environments |
| Package | 8-pin μDFN (2mm × 2mm, 0.5mm pitch); enables compact PCB layout in space-constrained handheld devices |
Pinout & Package
Package: 8-pin µDFN (2mm × 2mm, 0.5mm pitch), exposed pad, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low when VCC < 2.63V or during battery backup; holds low ≥140ms after VCC recovery |
| 2 - PFI | Power-fail input | Monitors external supply via resistor divider; trips PFO when voltage falls below 1.235V |
| 3 - GND | Ground reference | Primary return path for VCC, BATT, and all internal circuitry; must be low-impedance |
| 4 - PFO | Active-low power-fail output | Push-pull output asserted low when PFI < 1.235V or VCC < reset threshold |
| 5 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT until switchover to BATT |
| 6 - OUT | Regulated output | Sources from VCC normally; switches to BATT during brownout; supports up to 200mA load |
| 7 - BATT | Backup battery input | Connects coin cell or supercap; activates when VCC < VTH and VCC < VBATT – 40mV |
| 8 - BATTON | Battery-on status indicator | Push-pull output driven high only during valid battery backup mode; sinks 3.2mA @ 0.4V |
Key Features
| Feature | Design Value |
|---|---|
| Battery-on (BATTON) indicator | Push-pull output signals active battery backup mode without external components |
| Factory-set 2.63V reset threshold | Eliminates external resistor network for 2.5V system monitoring; ±0.07V accuracy over temperature |
| Ultra-low 13µA quiescent current | Extends shelf life of backup batteries in long-term storage or infrequent-use applications |
| Automatic 40mV-hysteresis switchover | Prevents oscillation during slow VCC decay; ensures clean transition between VCC and BATT paths |
| 2mm × 2mm μDFN-8 package | Reduces board area by >50% vs. SOIC-8; compatible with fine-pitch automated assembly |
| 140ms minimum reset timeout | Guarantees full microprocessor initialization before release; meets JEDEC JESD78 requirements |
Applications
| Portable POS Terminals | Real-Time Clock (RTC) Backup |
|---|---|
|
Use Scenario: Battery-backed memory retention during AC power loss or battery swap in handheld payment terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, automatic BATT switchover, and BATTON status signaling to host MCU. Use Value: Prevents transaction data loss by maintaining SRAM power and confirming backup activation via BATTON high state. |
Use Scenario: Preserving timekeeping and calendar data in embedded RTC modules during main power interruption. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring continuous RTC power from coin cell when VCC drops below 2.63V. Use Value: Enables >10-year coin-cell lifetime due to 2µA max battery standby current and precise 2.63V trip point. |
| Industrial Data Loggers | Smart Meters |
|
Use Scenario: Maintaining volatile configuration and last-read sensor values during grid brownouts in remote field loggers. IC Role / Device Role / Timing Role: Reset generator and battery switchover controller interfacing with nonvolatile FRAM/SRAM and MCU reset line. Use Value: Guarantees data integrity with 140ms reset hold time and noise-immune power-fail warning via PFI/PFO. |
Use Scenario: Securing meter firmware state and tariff data during utility power fluctuations in residential electricity meters. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 3.3V logic rail and provides battery-backed RTC power path with BATTON feedback. Use Value: Meets IEC 62053-21 tamper-resistance requirements via reliable brownout detection and switchover hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16035PLA26+T | Same 2.63V reset threshold and 8-pin μDFN, but includes PFO open-drain instead of push-pull; no BATTON output | Lacks battery-status indication; requires external pull-up for PFO; unsuitable where BATTON-driven LED or transistor control is needed | Select MAX16039PLA26+T when explicit battery-active signaling is required; choose MAX16035PLA26+T only if PFO flexibility outweighs BATTON need |
| TPS3808G33DBVR | 3.3V fixed reset threshold, SOT-23-6 package, no battery switchover or BATTON; 1.8µA IQ, 200ms reset timeout | Only provides reset supervision-no backup power management, no PFI/PFO, no OUT/BATT switching | Use only for basic 3.3V reset generation without battery backup; not a functional substitute for MAX16039PLA26+T's integrated switchover |
Compared with MAX16035PLA26+T, the MAX16039PLA26+T adds essential BATTON status signaling at no cost to footprint or quiescent current; versus TPS3808G33DBVR, it delivers complete battery-backup functionality-including switchover, PFI/PFO, and OUT routing-making it irreplaceable in SRAM-retention designs.
Availability
MAX16039PLA26+T is available at Aetrix Electronics and suitable for portable POS terminals, real-time clock backup systems, industrial data loggers, and smart meters requiring stable component supply across extended product lifecycles.
Supply support for MAX16039PLA26+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 connectivity applications with emphasis on reliability and integration.
The MAX16033–MAX16040 product line delivers compact, low-power supervisory solutions for battery-backed memory systems, targeting portable, industrial, and metering applications where space, current budget, and brownout resilience are critical.
FAQ
What is the reset threshold voltage of the MAX16039PLA26+T?
The MAX16039PLA26+T has a factory-set reset threshold of 2.63V (typical), with a guaranteed range of 2.55V to 2.70V across -40°C to +85°C. This value is laser-trimmed and applies specifically to the "26" suffix variant, making it suitable for reliable supervision of 2.5V supply rails with adequate margin against transient droop.
Does the MAX16039PLA26+T support battery switchover, and what is the switchover condition?
Yes, the MAX16039PLA26+T supports automatic battery switchover. Switchover occurs when both conditions are met: (1) VCC falls below the 2.63V reset threshold, and (2) VCC is at least 40mV lower than VBATT. This 40mV hysteresis prevents chattering during slow VCC decay and ensures stable OUT sourcing from the backup battery.
What is the function of the BATTON pin on the MAX16039PLA26+T?
The BATTON pin on the MAX16039PLA26+T is an active-high push-pull output that asserts high exclusively during valid battery backup mode-i.e., when VCC is below threshold and VBATT is powering OUT. It sinks 3.2mA at 0.4V saturation and sources ~10µA, enabling direct LED driving or base/gate control of external pass transistors without pull-up components.
Can the MAX16039PLA26+T operate with a 1.2V supply?
Yes, the MAX16039PLA26+T operates from 1.2V to 5.5V on VCC. Its reset output remains valid down to 1.2V, and quiescent current is specified at 13µA (typ) with VCC = 2.8V. At 1.2V, the device functions but reset timing and output drive strength are reduced per datasheet limits-designers should verify timing margins for 1.2V use cases.
Is the MAX16039PLA26+T pin-compatible with other devices in the MAX16033–MAX16040 family?
No-the MAX16039PLA26+T uses the 8-pin μDFN package and omits pins present in 10-pin variants (e.g., CEIN, CEOUT, MR, WDI, RESETIN). While it shares core functions like RESET, PFI, PFO, VCC, OUT, BATT, and BATTON with other 8-pin members (e.g., MAX16037/MAX16038), it is not pin-compatible with 10-pin versions or variants lacking BATTON (e.g., MAX16035).
MAX16039PLA26+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:
- 2.63V
- 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)
MAX16039PLA26+T FAQ
1.How can I place an order for MAX16039PLA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039PLA26+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 MAX16039PLA26+T reliable?
The price and inventory of MAX16039PLA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039PLA26+T is usually 5 days.
3.What payment methods are accepted for MAX16039PLA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039PLA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039PLA26+T?
MAX16039PLA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039PLA26+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 MAX16039PLA26+T?
For technical support, including MAX16039PLA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039PLA26+T requirements.
6.How does Aetrix verify that MAX16039PLA26+T is sourced from the original manufacturer or authorized distributors?
All MAX16039PLA26+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 MAX16039PLA26+T meets industry standards.
7.What is the process for return or replacement of MAX16039PLA26+T?
All MAX16039PLA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039PLA26+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 MAX16039PLA26+T part is unused and in its original packaging.
Return procedure for MAX16039PLA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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