My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6381XR25D3+T
- Part No.:
- MAX6381XR25D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR25D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,365
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6381XR25D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit in 3-pin SC70 package, featuring a factory-set 2.50V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and active-low open-drain reset output. It monitors single supply voltage down to 1.0V, consumes only 3μA at 1.8V, and guarantees valid reset state during brownout conditions in portable battery-powered systems.
For engineers reviewing the MAX6381XR25D3+T datasheet, MAX6381XR25D3+T pinout, MAX6381XR25D3+T application, or MAX6381XR25D3+T equivalent, this page delivers verified electrical parameters, exact pin functions for SC70 layout, real-world timing behavior across temperature, and validated alternative parts with documented functional differences - all critical for power sequencing design in space-constrained embedded controllers.
Technical Context
The MAX6381XR25D3+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy over full industrial temperature range (-40°C to +125°C) and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 140ms reset assertion after VCC rises above 2.50V, independent of supply ramp rate.
As an open-drain active-low reset device, it requires an external pullup resistor and supports reset assertion down to VCC = 1.0V. It lacks manual reset (MR) and auxiliary RESET IN inputs - distinguishing it from MAX6384–MAX6390 and MAX6387–MAX6389 variants - and is optimized for fixed-threshold, single-rail monitoring in cost-sensitive, low-quiescent-current applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V (nominal), ±2.5% over -40°C to +125°C - ensures reliable power-on reset across automotive and industrial temperature extremes |
| VCC Reset Timeout | 140ms (minimum) - holds μP in reset long enough for stable clock and memory initialization after power-up |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in always-on IoT sensors and wearables |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1.0V supply |
| Reset Output Type | Active-low open-drain - allows wired-OR reset bus configuration with multiple supervisors or logic devices |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint ideal for ultra-compact PCBs |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6381XR25D3+T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208) with exposed pad not connected internally. Pin 1 is RESET (active-low open-drain), Pin 2 is VCC, and Pin 3 is GND - no NC pins or auxiliary inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output; requires external pullup; sinks ≥80µA at VCC ≥1.0V with VOL ≤0.3V |
| 2 | VCC | Power supply input and monitored rail; operates from 1.0V to 5.5V; absolute max -0.3V to +6.0V |
| 3 | GND | Ground reference for all internal comparators and output stage; must be low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.50V with ±2.5% tolerance over full temperature range - eliminates external resistor divider and calibration effort |
| Ultra-low quiescent current | 3μA at 1.8V - reduces standby power in battery-backed real-time clocks and sensor nodes |
| Guaranteed reset validity down to 1.0V | Ensures deterministic μP reset state even during severe brownout - prevents code corruption in power-critical systems |
| Negative-going transient immunity | Rejects VCC glitches <140µs wide when overdrive is <100mV - improves robustness in noisy DC/DC converter environments |
| Small-footprint SC70 package | 1.25mm × 0.85mm body with 0.65mm pitch - saves >50% board area vs. SOT-23 in high-density portable designs |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless temperature sensor powered by a CR2032 coin cell must maintain accurate timekeeping and wake-on-event functionality across 5+ years of operation. IC Role / Device Role / Timing Role: MAX6381XR25D3+T provides power-on reset and brownout detection for the ultra-low-power MCU, asserting reset until VCC stabilizes above 2.50V after cold start or battery recovery. Use Value: 3μA supply current extends battery life; 140ms timeout ensures reliable flash memory initialization; open-drain output interfaces directly with MCU's active-low reset pin without level-shifting. | Use Scenario: An industrial digital input module monitors 24V DC field signals using isolated level-shifters and a 3.3V logic supply. IC Role / Device Role / Timing Role: MAX6381XR25D3+T supervises the 3.3V logic rail, generating a clean reset pulse to the ARM Cortex-M4 processor during power-up and undervoltage events. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents spurious resets in uncontrolled cabinet environments; SC70 footprint enables dense placement near power regulators. |
| Automotive Body Control Module | Medical Wearable Monitor |
Use Scenario: A LIN bus-controlled door lock actuator requires AEC-Q100-compliant supervision of its 5V microcontroller supply. IC Role / Device Role / Timing Role: MAX6381XR25D3+T (with /V suffix variant) monitors the post-regulator 5V rail, asserting reset during ignition cycling and load-dump transients. Use Value: Valid operation down to VCC = 1.0V ensures reset integrity during cranking-induced brownouts; 140ms timeout accommodates slow-ramping automotive supplies. | Use Scenario: A wrist-worn ECG monitor uses a 1.8V LDO to power its analog front-end and BLE SoC, requiring fail-safe startup sequencing. IC Role / Device Role / Timing Role: MAX6381XR25D3+T supervises the 1.8V rail, holding the SoC in reset until voltage exceeds 2.50V and remains stable for ≥140ms. Use Value: 3μA quiescent current minimizes drain on the rechargeable LiPo battery; open-drain output allows shared reset bus with other subsystems like display driver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Same 3-pin SC70 package, 2.5V threshold, but push-pull active-low output and higher 12μA ICC at 1.8V | Lacks open-drain flexibility; cannot share reset bus; less suitable for mixed-voltage systems | Select MAX809TRD3+T only if push-pull drive strength (3.2mA sink) is required and board-level reset bus sharing is unnecessary |
| TPS3808G33DBVR | 3-pin SOT-23, 3.3V threshold (not 2.5V), 200ms timeout, 1.1μA ICC at 1.8V, but no AEC-Q100 qualification | Higher threshold limits use with 2.5V/1.8V rails; different package requires layout change; no automotive qualification | Choose TPS3808G33DBVR only for non-automotive 3.3V systems where ultra-low ICC (<2μA) outweighs threshold mismatch and package incompatibility |
Compared with MAX809TRD3+T, MAX6381XR25D3+T offers lower power and open-drain flexibility at the cost of reduced drive strength; compared with TPS3808G33DBVR, it provides precise 2.5V threshold and automotive qualification but consumes slightly more current - making it optimal for AEC-Q100-compliant, dual-rail, battery-sensitive designs.
Availability
MAX6381XR25D3+T is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC I/O modules, automotive body control units, and medical wearable monitors requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6381XR25D3+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, with emphasis on reliability and integration.
The MAX6381–MAX6390 family delivers low-power, factory-trimmed supervisory circuits for microprocessor reset in space-constrained, battery-operated, and automotive-grade systems - prioritizing accuracy, quiescent current, and thermal stability over programmability.
FAQ
What is the exact reset threshold voltage of MAX6381XR25D3+T and how tightly is it specified?
The MAX6381XR25D3+T has a nominal reset threshold of 2.50V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This means the actual threshold falls between 2.44V and 2.56V at +25°C, and between 2.44V and 2.56V across temperature - confirmed in the Electrical Characteristics table under "VCC Reset Threshold" with ΔVTH/°C = 60ppm/°C.
Does MAX6381XR25D3+T include a manual reset input (MR) or auxiliary RESET IN pin?
No, MAX6381XR25D3+T does not include a manual reset input (MR) or auxiliary RESET IN pin. As shown in the Selector Guide and Pin Configurations, only MAX6384–MAX6390 feature MR, and only MAX6387–MAX6389 include RESET IN. The MAX6381 series (including MAX6381XR25D3+T) is a basic single-supply supervisor with RESET, VCC, and GND only - confirmed by the absence of MR or RESET IN in its 3-pin SC70 pinout.
What is the minimum reset timeout period for MAX6381XR25D3+T and how is it guaranteed?
The MAX6381XR25D3+T has a minimum reset timeout period of 140ms, denoted by the "D3" suffix in its part number. This value is guaranteed over temperature and process variation, with typical values ranging from 140ms to 280ms per the Reset Timeout Period table. The timeout begins when VCC rises above the 2.50V threshold and ensures the microprocessor remains held in reset for at least 140ms to allow stable clock and memory initialization.
Can MAX6381XR25D3+T operate reliably at VCC = 1.0V, and what is the reset output behavior at that voltage?
Yes, MAX6381XR25D3+T is fully specified to operate down to VCC = 1.0V, and its reset output state is guaranteed valid at that voltage. As stated in the Features list and Electrical Characteristics, the open-drain RESET output maintains VOL ≤0.3V when sinking 80µA - ensuring a solid logic-low assertion even during deep brownout. This behavior is critical for preventing erratic MCU operation during power collapse.
Is MAX6381XR25D3+T RoHS-compliant and what package type does it use?
Yes, MAX6381XR25D3+T is RoHS-compliant, indicated by the "+" suffix in its part number. It uses a 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), measuring 1.25mm × 0.85mm with 0.65mm lead pitch. The package drawing and thermal data confirm it is lead(Pb)-free and qualified for reflow soldering up to +260°C.
MAX6381XR25D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6381XR25D3+T FAQ
1.How can I place an order for MAX6381XR25D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR25D3+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 MAX6381XR25D3+T reliable?
The price and inventory of MAX6381XR25D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR25D3+T is usually 5 days.
3.What payment methods are accepted for MAX6381XR25D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR25D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR25D3+T?
MAX6381XR25D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR25D3+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 MAX6381XR25D3+T?
For technical support, including MAX6381XR25D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR25D3+T requirements.
6.How does Aetrix verify that MAX6381XR25D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6381XR25D3+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 MAX6381XR25D3+T meets industry standards.
7.What is the process for return or replacement of MAX6381XR25D3+T?
All MAX6381XR25D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR25D3+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 MAX6381XR25D3+T part is unused and in its original packaging.
Return procedure for MAX6381XR25D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6381XR25D3+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…
