My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16037LLA26+T
- Part No.:
- MAX16037LLA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16037LLA26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX16037LLA26+T from Maxim Integrated is an 8-pin μDFN low-power supervisory circuit for microprocessor systems, providing manual-reset input, power-fail warning, active-low push-pull reset output, and battery switchover control. It features a factory-set 2.63V reset threshold (±70mV), 140ms minimum reset timeout, and operates from 1.2V to 5.5V supply voltage. It is used in portable equipment requiring reliable brownout detection and SRAM backup during VCC failure.
For engineers reviewing the MAX16037LLA26+T datasheet, MAX16037LLA26+T pinout, MAX16037LLA26+T application, or MAX16037LLA26+T equivalent, key selection criteria include its 2.63V reset threshold accuracy, 13µA quiescent current at 2.8V, 8-pin 2mm × 2mm μDFN package, and integrated debounced manual-reset input with internal 20kΩ pullup - all critical for space-constrained, battery-sensitive designs.
Technical Context
The MAX16037LLA26+T implements a precision reset generator with a fixed 2.63V threshold referenced to an internal bandgap, enabling accurate monitoring of 2.5V/3.0V rails. Its manual-reset input (MR) is debounced internally and asserts reset for ≥140ms after MR release, eliminating external RC networks.
It integrates a dedicated power-fail comparator (PFI/PFO) with 1.235V threshold and 1% hysteresis, independent of the main reset path. The device uses a MOSFET-based switchover architecture to connect BATT to OUT when VCC falls below both VTH and VBATT, with 40mV hysteresis preventing chatter during slow VCC decay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.55V (min) to 2.70V (max) - ensures reliable reset assertion on 2.5V systems with ±3% margin over nominal rail. |
| Reset Timeout Period | 140ms (min) - guarantees sufficient hold time for µP initialization and memory stabilization after power recovery. |
| Supply Current (ICC) | 13µA (typ) at VCC = 2.8V - enables multi-year operation from coin-cell batteries in always-on backup mode. |
| Battery Standby Current | 2µA (max, -40°C to +85°C) - minimizes drain on backup source when VCC = 0V and system is fully powered down. |
| VCC-to-OUT On-Resistance | 3.1Ω (typ) at VCC = 4.75V, IOUT = 150mA - supports up to 200mA load from main supply with <0.5V dropout. |
| MR Input Pullup Resistance | 20kΩ (min) - allows direct connection of momentary switch to GND without external resistor; compatible with TTL/CMOS logic. |
| Operating Temperature Range | -40°C to +85°C - qualified for industrial and extended commercial environments without derating. |
Pinout & Package
MAX16037LLA26+T is housed in a lead(Pb)-free, RoHS-compliant 8-pin µDFN package (2mm × 2mm, 0.5mm pitch). The package supports reflow soldering and provides thermal performance suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks 20mA; remains asserted until VCC > 2.63V for ≥140ms after power-up or MR release. |
| 2 - PFI | Power-fail input | Monitors auxiliary supply via resistive divider; triggers PFO low when voltage falls below 1.235V (±50mV). |
| 3 - GND | Ground reference | Common return for VCC, BATT, and signal paths; must be low-impedance to ensure reset threshold stability. |
| 4 - MR | Manual-reset input | Debounced logic input; internal 20kΩ pullup to VCC; asserts RESET when pulled low; no external components required. |
| 5 - PFO | Active-low power-fail output | Push-pull output indicating PFI undervoltage condition; also asserts when VCC falls below reset threshold. |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation. |
| 7 - OUT | Regulated output | Sources from VCC (≤200mA) or BATT (backup mode); switches automatically with 40mV hysteresis to prevent oscillation. |
| 8 - BATT | Backup battery input | Connects to coin cell or supercap; supplies OUT only when VCC < VTH and VCC < VBATT; draws ≤2µA standby current. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V ±70mV (L_A26 variant) - eliminates need for external resistor dividers or calibration in 2.5V system monitoring. |
| Integrated manual-reset debouncing | Internal RC filtering and 120ns MR-to-RESET delay - removes requirement for external capacitor or Schmitt-trigger buffer. |
| Low-quiescent-current battery backup | 2µA max battery current at -40°C to +85°C - extends shelf life of lithium coin cells beyond 10 years in storage. |
| Dual-path power-fail detection | Independent PFI comparator with 1.235V reference - enables simultaneous monitoring of primary rail (via VCC) and secondary rail (via PFI). |
| Robust switchover hysteresis | 40mV VCC-to-BATT transition hysteresis - prevents repeated switching during slow brownout recovery or noisy supply conditions. |
| Small-footprint packaging | 2mm × 2mm, 8-pin µDFN - saves >60% board area vs. SOIC-8 while maintaining thermal performance for 200mA loads. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG monitor retains real-time waveform data in SRAM during AC power loss or battery swap. IC Role / Device Role: MAX16037LLA26+T monitors 3.0V system rail and switches SRAM supply from VCC to backup coin cell within 1µs of brownout detection. Use Value: Guarantees zero-data-loss operation with 2.63V reset threshold aligned to 3.0V rail tolerance and 140ms reset hold time for safe memory save sequence. |
Use Scenario: Remote I/O module maintains configuration EEPROM and real-time clock during 24VDC supply dips caused by motor startup. IC Role / Device Role: MAX16037LLA26+T asserts RESET to ARM Cortex-M4 and drives BATTON to enable external backup regulator for RTC and nonvolatile registers. Use Value: 13µA ICC and 2µA battery standby current extend backup runtime; PFI input monitors 5V auxiliary rail independently for early fault warning. |
| Retail Point-of-Sale Terminals | Smart Energy Meters |
|
Use Scenario: POS terminal preserves transaction log and cryptographic keys in SRAM during brief grid interruptions or battery replacement. IC Role / Device Role: MAX16037LLA26+T provides debounced MR input for service technician reset and automatic switchover to supercap backup on 3.3V rail. Use Value: Internal 20kΩ MR pullup eliminates BOM cost; 2.63V threshold ensures reset before 3.3V rail drops below µP operational minimum (2.7V). |
Use Scenario: Electricity meter retains time-of-use billing data and tamper logs during utility voltage sags or neutral disconnect events. IC Role / Device Role: MAX16037LLA26+T monitors 2.5V LDO output feeding metrology ASIC and triggers PFO interrupt to initiate secure shutdown sequence. Use Value: Independent 1.235V PFI comparator enables precise 2.5V rail monitoring without affecting main reset path; 140ms tRP meets IEC 62053-21 timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16037PLA26+T | Same pinout and reset threshold, but open-drain RESET/PFO outputs instead of push-pull. | Requires external pullup resistors; suited for wired-OR reset buses or level-shifting interfaces. | Select when interfacing with multiple reset sources or legacy µPs requiring open-drain reset signaling. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 350ms timeout, 2.5µA ICC, SOT-23-6 package. | Lacks MR input, battery switchover, and PFI/PFO; designed for simple reset-only applications. | Choose only if battery backup and manual reset are unnecessary and board space permits larger SOT-23 footprint. |
Compared with MAX16037PLA26+T, the MAX16037LLA26+T eliminates external pullups and simplifies layout; versus TPS3808G33DBVR, it delivers full battery-backup functionality and dual-supply monitoring in the same compact µDFN, making it irreplaceable for SRAM-retention-critical designs.
Availability
MAX16037LLA26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, retail point-of-sale terminals, and smart energy meters requiring stable component supply across long product lifecycles.
Supply support for MAX16037LLA26+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 interface applications in industrial, computing, and communications markets.
The MAX16033–MAX16040 family was engineered specifically for µP-based systems needing integrated battery backup, manual reset, and power-fail warning in minimal footprint - targeting portable, battery-powered, and mission-critical embedded devices.
FAQ
What is the exact reset threshold voltage of the MAX16037LLA26+T?
The MAX16037LLA26+T has a factory-set reset threshold of 2.63V, with guaranteed limits of 2.55V (minimum) and 2.70V (maximum) over temperature. This value is laser-trimmed during production and applies specifically to the "L_A26" suffix variant, ensuring compatibility with 2.5V system rails while maintaining margin against noise and drift.
Does the MAX16037LLA26+T support battery switchover without external components?
Yes, the MAX16037LLA26+T performs fully autonomous battery switchover using internal MOSFETs. When VCC falls below both the 2.63V reset threshold and VBATT (with 40mV hysteresis), it seamlessly connects BATT to OUT without diodes, resistors, or controllers. The device draws only 2µA from the backup source in standby, enabling long-term retention.
Can the MR input of the MAX16037LLA26+T be left unconnected?
Yes - the MR input of the MAX16037LLA26+T includes an internal 20kΩ (minimum) pullup resistor to VCC, so it may be left floating or tied to VCC if manual reset functionality is not required. Driving MR low with a switch or logic signal asserts RESET; no external debounce circuitry is needed due to built-in filtering.
How does the PFI input function in the MAX16037LLA26+T?
The PFI input in the MAX16037LLA26+T connects to a dedicated 1.235V comparator, independent of the main reset generator. When voltage at PFI falls below 1.235V (±50mV), PFO goes low - providing early power-fail warning for secondary supplies. It can monitor any rail using a resistive divider and supports hysteresis extension via external feedback.
Is the MAX16037LLA26+T pin-compatible with other members of the MAX16033–MAX16040 family?
The MAX16037LLA26+T shares the same 8-pin µDFN package and pinout with MAX16037–MAX16040 variants, but differs functionally from MAX16033–MAX16036 (10-pin) and feature sets like watchdog (MAX16034/MAX16038) or BATTON (MAX16035/MAX16039). Pin compatibility is limited to same-pin-count variants; electrical behavior depends on suffix-coded features.
MAX16037LLA26+T 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:
- 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)
MAX16037LLA26+T FAQ
1.How can I place an order for MAX16037LLA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16037LLA26+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 MAX16037LLA26+T reliable?
The price and inventory of MAX16037LLA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16037LLA26+T is usually 5 days.
3.What payment methods are accepted for MAX16037LLA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16037LLA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16037LLA26+T?
MAX16037LLA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16037LLA26+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 MAX16037LLA26+T?
For technical support, including MAX16037LLA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16037LLA26+T requirements.
6.How does Aetrix verify that MAX16037LLA26+T is sourced from the original manufacturer or authorized distributors?
All MAX16037LLA26+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 MAX16037LLA26+T meets industry standards.
7.What is the process for return or replacement of MAX16037LLA26+T?
All MAX16037LLA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16037LLA26+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 MAX16037LLA26+T part is unused and in its original packaging.
Return procedure for MAX16037LLA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16037LLA26+T 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…
