My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16037LLA31+
- Part No.:
- MAX16037LLA31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16037LLA31+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,198
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX16037LLA31+ from Maxim Integrated is an 8-pin μDFN low-power microprocessor supervisory circuit with manual-reset input, power-fail comparator, active-low push-pull reset output, and battery switchover control. It provides precise 3.08V reset threshold, 140ms minimum reset timeout, and operates from 1.2V to 5.5V supply voltage. Used in portable equipment and POS terminals to ensure reliable SRAM backup during brownout.
For engineers reviewing the MAX16037LLA31+ datasheet, MAX16037LLA31+ pinout, MAX16037LLA31+ application, or MAX16037LLA31+ equivalent, key selection criteria include its factory-set 3.08V reset threshold, 13µA quiescent current at 2.8V, debounced MR input, and integrated VCC-to-BATT switchover with <40mV hysteresis - all in a space-constrained 2mm × 2mm package.
Technical Context
The MAX16037LLA31+ integrates a precision reset generator with ±1.5% threshold accuracy over temperature, a dedicated manual-reset input with internal 20kΩ pullup and 1µs minimum pulse width support, and independent power-fail detection using a 1.235V reference comparator. Its reset assertion logic combines VCC monitoring, MR state, and reset timeout timing.
It implements battery switchover via a low-on-resistance MOSFET path (3.7Ω typical at 3.15V VCC), supports active-low push-pull RESET output with 0.3V VOL at 1.6mA sink, and maintains reset validity down to 1.2V supply - enabling operation during deep brownout conditions before full system shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.00V (min) to 3.15V (max); factory-trimmed 3.08V nominal for stable 3.0V/3.3V rail monitoring |
| Reset Timeout Period | 140ms (min); ensures µP completes power-up initialization before release |
| Supply Current | 13µA typical at VCC = 2.8V; enables multi-year battery life in backup mode |
| VCC Operating Range | 1.2V to 5.5V; supports operation through deep brownout and wide-input systems |
| Output Type | Active-low push-pull RESET; eliminates external pullup and simplifies interface to µP reset pin |
| Battery Switchover Hysteresis | 40mV; prevents oscillation during slow VCC decay near threshold crossing |
| MR Input Pullup | 20kΩ (min) to VCC; allows direct connection of momentary switch without external components |
Pinout & Package
MAX16037LLA31+ uses an 8-pin, 2mm × 2mm µDFN package with wettable flanks and RoHS-compliant lead-free finish. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise convention starting from top-left corner when marking is oriented upright.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low during VCC < 3.08V, MR low, or after reset timeout; drives µP reset pin directly |
| 2 - PFI | Power-fail input | Monitors external voltage divider; triggers PFO when input falls below 1.235V |
| 3 - GND | Ground reference | Primary return path for VCC, BATT, and signal currents; must be low-impedance |
| 4 - MR | Manual-reset input | Logic-low assertion forces RESET; internally pulled up to VCC; debounced against noise |
| 5 - PFO | Active-low power-fail output | Push-pull output goes low when PFI < 1.235V or VCC < reset threshold |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT when above threshold |
| 7 - OUT | Regulated output | Sources from VCC normally; switches to BATT during backup; supports up to 200mA load |
| 8 - BATT | Backup battery input | Connects to coin cell or supercap; activates when VCC < VTH and VCC < VBATT – 40mV |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 3.08V reset threshold | Eliminates external resistor network; guarantees ±1.5% accuracy over -40°C to +85°C |
| Debounced manual-reset input | Internal 20kΩ pullup and 1µs glitch immunity enable direct switch connection without RC filter |
| Independent power-fail comparator | Dedicated 1.235V reference and PFI/PFO path allows early warning of secondary rail failure |
| Low 13µA quiescent current | Extends battery life in always-on backup mode; measured at VCC = 2.8V, TA = +25°C |
| VCC-to-RESET propagation delay | 25µs max on VCC falling edge; ensures rapid response to supply collapse |
Applications
| Portable/Battery-Powered Equipment | POS Equipment |
|---|---|
Use Scenario: Handheld barcode scanners powered by single-cell Li-ion with SRAM retention requirement during battery swap. IC Role / Device Role / Timing Role: Supervisory IC providing manual reset, battery switchover, and brownout protection for static RAM. Use Value: Enables zero-data-loss hot-swap via 3.08V threshold tracking 3.0V rail and 40mV hysteresis preventing chatter during transition. |
Use Scenario: Compact retail terminal with flash memory and real-time clock requiring nonvolatile data integrity during AC dropout. IC Role / Device Role / Timing Role: Power-monitoring supervisor asserting reset and switching to backup battery within 25µs of VCC collapse. Use Value: Guarantees 140ms reset hold time for safe flash write completion and RTC register freeze before power loss. |
| Critical μP/μC Power Monitoring | Industrial Control |
Use Scenario: Programmable logic controller module operating from unregulated 5V DC input subject to line transients. IC Role / Device Role / Timing Role: Primary reset generator with power-fail warning and MR override for firmware recovery. Use Value: Uses independent PFI comparator to trigger PFO interrupt 100µs before VCC drops below 3.08V, enabling preemptive save operations. |
Use Scenario: Remote sensor node powered by energy harvesting with intermittent 3.3V supply and EEPROM logging. IC Role / Device Role / Timing Role: Low-quiescent supervisor maintaining SRAM state and enabling graceful shutdown on supply decay. Use Value: Draws only 2µA in battery-backup mode (TA = -40°C to +85°C), extending operational uptime between harvest cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16037PLA31+ | Same pinout and functionality but features active-low open-drain RESET and PFO outputs instead of push-pull | Requires external pullup resistors; suited for wired-OR reset bus configurations or level translation | Select when interfacing with multiple reset sources or legacy µPs requiring open-drain reset signaling |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 350ms timeout, 2.9µA IQ, SOT-23-6 package; no battery switchover or MR input | Lacks backup-battery control and manual reset; limited to basic power monitoring without SRAM retention | Choose for cost-sensitive, space-constrained applications needing only reset supervision - not battery backup |
Compared with MAX16037PLA31+, the MAX16037LLA31+ eliminates external pullups and simplifies layout; versus TPS3808G33DBVR, it adds critical battery switchover and MR capability essential for data-retentive embedded systems.
Availability
MAX16037LLA31+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, POS terminals, and industrial control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX16037LLA31+ 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications across industrial, automotive, and computing markets.
The MAX16033–MAX16040 family was engineered specifically for low-power, space-constrained microprocessor systems requiring integrated reset, battery switchover, and power-fail warning - targeting portable and mission-critical embedded platforms.
FAQ
What is the factory-set reset threshold voltage for MAX16037LLA31+?
The MAX16037LLA31+ has a factory-set reset threshold of 3.08V nominal, with guaranteed range of 3.00V to 3.15V over -40°C to +85°C. This value is laser-trimmed during production and applies specifically to the "A31" suffix variant, making it ideal for monitoring 3.0V and 3.3V power rails without external components.
Does MAX16037LLA31+ support battery backup functionality?
Yes, MAX16037LLA31+ provides fully integrated battery switchover: when VCC falls below 3.08V and VBATT exceeds VCC by at least 40mV, the device automatically connects the BATT pin to the OUT pin to maintain power to SRAM or RTC. The internal MOSFET delivers up to 200mA with typical on-resistance of 3.7Ω at 3.15V.
What type of reset output does MAX16037LLA31+ provide?
MAX16037LLA31+ provides an active-low push-pull RESET output (denoted by "L" in the part number). It actively drives low during reset and high when deasserted - eliminating the need for an external pullup resistor and ensuring fast, robust interface to microprocessor reset inputs.
Can MAX16037LLA31+ monitor a secondary power supply?
Yes, MAX16037LLA31+ includes a dedicated PFI (power-fail input) pin referenced to an internal 1.235V comparator. By connecting a resistor divider from a secondary supply to PFI, the device can generate a PFO interrupt when that supply falls below the calculated trip point - independent of the main VCC reset function.
What is the minimum reset timeout period for MAX16037LLA31+?
The minimum reset timeout period for MAX16037LLA31+ is 140ms, guaranteed over temperature. This ensures sufficient hold time for microprocessors to complete power-up initialization sequences and stabilize clocks before release - critical for reliable boot in embedded systems.
MAX16037LLA31+ 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:
- 3.08V
- 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)
MAX16037LLA31+ FAQ
1.How can I place an order for MAX16037LLA31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16037LLA31+ 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 MAX16037LLA31+ reliable?
The price and inventory of MAX16037LLA31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16037LLA31+ is usually 5 days.
3.What payment methods are accepted for MAX16037LLA31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16037LLA31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16037LLA31+?
MAX16037LLA31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16037LLA31+ 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 MAX16037LLA31+?
For technical support, including MAX16037LLA31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16037LLA31+ requirements.
6.How does Aetrix verify that MAX16037LLA31+ is sourced from the original manufacturer or authorized distributors?
All MAX16037LLA31+ 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 MAX16037LLA31+ meets industry standards.
7.What is the process for return or replacement of MAX16037LLA31+?
All MAX16037LLA31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16037LLA31+, 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 MAX16037LLA31+ part is unused and in its original packaging.
Return procedure for MAX16037LLA31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16037LLA31+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
