My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6381XR30D3-T
- Part No.:
- MAX6381XR30D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR30D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6381XR30D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit in 3-pin SC70 package, featuring factory-set 3.00V 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 MAX6381XR30D3-T datasheet, MAX6381XR30D3-T pinout, MAX6381XR30D3-T application, or MAX6381XR30D3-T equivalent, this device serves as a precision, ultra-low-quiescent-current reset supervisor for space-constrained embedded controllers, critical μP power sequencing, and dual-voltage monitoring where guaranteed reset assertion below 1V VCC is required.
Technical Context
The MAX6381XR30D3-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms minimum reset timeout after VCC recovers above 3.00V, independent of temperature or supply variation.
This variant belongs to the MAX6381–MAX6390 family's open-drain active-low subgroup (no MR or RESET IN pins) and uses a 3-pin SC70 package with RESET, VCC, and GND terminals - eliminating N.C. pins and manual reset logic found in higher-pin-count variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V (min 2.93V, max 3.08V at -40°C to +125°C); sets precise brownout detection point for 3.3V I/O rails |
| VCC Supply Current | 3μA at +1.8V; enables multi-year battery life in always-on portable instrumentation |
| Reset Timeout | 140ms (min); ensures sufficient μP initialization time after power recovery |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset assertion even during deep brownout down to 1V |
| Reset Output Type | Active-low open-drain; requires external pullup for level translation or wired-OR configuration |
| Temperature Range | -40°C to +125°C; qualified for industrial and automotive under-hood environments |
| Package | 3-pin SC70 (X3+2 outline); 1.25mm × 0.85mm footprint ideal for compact PCB layouts |
Pinout & Package
MAX6381XR30D3-T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with no unused pins - all three terminals serve defined electrical functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain active-low reset output | Drives low to assert reset; requires external pullup resistor; sinks up to 3.2mA at VCC ≥ 4.5V |
| 2 (VCC) | Supply input and monitored voltage rail | Primary power source and reset trigger input; accepts 1.0V–5.5V; supports operation down to 1V |
| 3 (GND) | Ground reference | Return path for VCC and RESET; must be low-impedance connection to maintain threshold accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.00V with ±2.5% tolerance over full temperature range - eliminates external resistor network calibration |
| Ultra-low quiescent current | 3μA at 1.8V - reduces standby power in battery-backed real-time clocks and sensor nodes |
| Guaranteed reset validity | RESET output state remains valid down to VCC = 1.0V - prevents spurious release during slow power ramp-down |
| Negative-going transient immunity | Rejects VCC glitches ≤ 100µs duration when overdrive is < 100mV - improves noise robustness without added filtering |
| Small-footprint packaging | 3-pin SC70 (1.25mm × 0.85mm) - saves >60% board area vs. 6-pin µDFN or SOT-23 alternatives |
Applications
| Power Monitoring in Portable Instruments | Critical μP Sequencing in Industrial Controllers |
|---|---|
Use Scenario: Battery-powered handheld multimeter with dual 3.3V/1.8V rails and sleep mode requiring reliable wake-up reset. IC Role / Device Role / Timing Role: Single-rail supervisor monitoring main 3.3V supply; asserts open-drain RESET to μP until stable post-brownout. Use Value: 140ms timeout ensures complete ADC and display controller initialization; 3μA ICC extends battery life by >2 years in sleep mode. |
Use Scenario: PLC I/O module operating in harsh factory environment with fluctuating 24V-derived 3.3V rail. IC Role / Device Role / Timing Role: Dedicated reset generator for ARM Cortex-M4 core; triggers hard reset on undervoltage events below 3.00V. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents false resets during thermal cycling; SC70 package withstands vibration. |
| Dual-Voltage System Supervision | Low-Power Embedded Sensor Node |
Use Scenario: IoT edge node with separate 3.3V I/O and 1.8V RF SoC supplies, where only main rail is monitored. IC Role / Device Role / Timing Role: Primary VCC monitor for 3.3V rail; open-drain output shared across multiple devices via pullup to 3.3V. Use Value: Open-drain architecture enables wired-OR reset bus; 3.00V threshold aligns precisely with 3.3V LDO dropout margin. |
Use Scenario: Wireless environmental sensor using coin-cell battery and ultra-low-power MCU with deep-sleep cycles. IC Role / Device Role / Timing Role: Always-on reset supervisor ensuring clean boot after cold-start or brownout from weak battery. Use Value: Valid reset assertion down to VCC = 1.0V prevents erratic behavior during final battery discharge phase; 3-pin SC70 minimizes BOM count. |
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 | 3.08V reset threshold (±2.5%), 140ms timeout, same 3-pin SC70 package, but push-pull active-low output | Requires no external pullup; incompatible with wired-OR reset buses | Select when board-level reset line drives only one IC and layout lacks space for pullup resistor |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), 200ms timeout, SOT-23-5 package, includes manual reset input and watchdog timer | Higher accuracy and additional features increase cost and footprint; not drop-in compatible | Select when tighter threshold tolerance or system-level watchdog functionality is required beyond basic reset supervision |
Compared with MAX809TRD3-T, MAX6381XR30D3-T offers open-drain flexibility for multi-device reset busing but requires an external pullup; compared with TPS3808G30DBVR, it delivers identical threshold and timeout in half the package size and lower cost, at the expense of watchdog capability and sub-1% accuracy.
Availability
MAX6381XR30D3-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical μP and μC power monitoring, and intelligent instruments requiring stable component supply with long-term industrial lifecycle support.
Supply support for MAX6381XR30D3-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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 product line delivers ultra-low-power, precision reset supervision for space- and power-constrained embedded systems - optimized for reliability in extended temperature environments without sacrificing footprint or quiescent current.
FAQ
What is the exact reset threshold voltage of MAX6381XR30D3-T and how does it vary with temperature?
The MAX6381XR30D3-T has a nominal reset threshold of 3.00V, with guaranteed minimum 2.93V and maximum 3.08V across -40°C to +125°C. This ±2.5% tolerance is maintained over temperature, supported by a 60ppm/°C tempco - meaning threshold drift is less than 18mV over the full range. The value is factory-trimmed and does not require external calibration.
Does MAX6381XR30D3-T support manual reset functionality?
No, MAX6381XR30D3-T does not include a manual reset (MR) input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which features only VCC monitoring and open-drain or push-pull reset outputs. Manual reset capability is present only in MAX6384–MAX6390 variants (e.g., MAX6384XR30D3-T), which use 4-pin SC70 or 6-pin µDFN packages.
What is the minimum supply voltage at which MAX6381XR30D3-T guarantees correct reset output behavior?
MAX6381XR30D3-T guarantees valid reset output logic state down to VCC = 1.0V. Below this, the internal comparator and timer may become unreliable. This feature ensures deterministic reset assertion during deep brownout conditions - critical for preventing code execution errors in battery-depleted systems before shutdown.
Can MAX6381XR30D3-T be used in automotive applications?
MAX6381XR30D3-T is rated for -40°C to +125°C operation and is AEC-Q100 qualified, but only specific /V-trim versions (e.g., MAX6381XR30D3/V+T) carry formal automotive qualification. The standard MAX6381XR30D3-T is suitable for industrial-grade automotive-adjacent applications (e.g., infotainment power sequencing), but for safety-critical modules, the /V suffix variant must be specified and sourced.
What package type and footprint does MAX6381XR30D3-T use, and are there land pattern recommendations?
MAX6381XR30D3-T uses the 3-pin SC70 package (outline number 21-0075, land pattern 90-0208). Its dimensions are 1.25mm × 0.85mm with 0.65mm pin pitch. Maxim recommends using the official land pattern to ensure solder joint reliability - deviations may cause tombstoning or insufficient thermal dissipation given its 340.4°C/W θJA rating on multilayer boards.
MAX6381XR30D3-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:
- 3V
- 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
MAX6381XR30D3-T FAQ
1.How can I place an order for MAX6381XR30D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR30D3-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 MAX6381XR30D3-T reliable?
The price and inventory of MAX6381XR30D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR30D3-T is usually 5 days.
3.What payment methods are accepted for MAX6381XR30D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR30D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR30D3-T?
MAX6381XR30D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR30D3-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 MAX6381XR30D3-T?
For technical support, including MAX6381XR30D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR30D3-T requirements.
6.How does Aetrix verify that MAX6381XR30D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6381XR30D3-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 MAX6381XR30D3-T meets industry standards.
7.What is the process for return or replacement of MAX6381XR30D3-T?
All MAX6381XR30D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR30D3-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 MAX6381XR30D3-T part is unused and in its original packaging.
Return procedure for MAX6381XR30D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6381XR30D3-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…
