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Analog Devices Inc./Maxim Integrated MAX6381XR29D3/GG8
- Part No.:
- MAX6381XR29D3/GG8
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6381XR29D3/GG8.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,769
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Product details
Overview
MAX6381XR29D3/GG8 from Maxim Integrated is a 3-pin SC70 packaged microprocessor supervisory circuit with factory-set 2.93V reset threshold, 140ms minimum VCC reset timeout, active-low push-pull reset output, and guaranteed operation down to VCC = 1V. It monitors +1.8V to +5.0V supply rails in battery-powered controllers and portable instrumentation, consuming only 3μA at +1.8V.
For engineers reviewing the MAX6381XR29D3/GG8 datasheet, MAX6381XR29D3/GG8 pinout, MAX6381XR29D3/GG8 application, or MAX6381XR29D3/GG8 equivalent, key selection criteria include its ±2.5% reset threshold accuracy over –40°C to +125°C, negative-going VCC transient immunity, and compatibility with critical μP power-up sequencing in space-constrained embedded systems.
Technical Context
The MAX6381XR29D3/GG8 implements a precision voltage comparator with internal 2.93V reference and an on-chip timer that asserts reset for ≥140ms after VCC rises above threshold. Its push-pull active-low output drives directly into μP reset inputs without external pullup, and logic state remains valid down to VCC = 1V.
No manual reset (MR) input or auxiliary RESET IN is present - this variant belongs to the MAX6381 family subset with minimal pin count (3-pin SC70), fixed threshold, and single-supply monitoring only. It lacks debouncing circuitry and dual-voltage capability found in higher-pin-count variants like MAX6384 or MAX6387.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout | 140ms minimum - guarantees sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage | +1.0V to +5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor and reduces BOM count |
| Reset Validity | Guaranteed down to VCC = 1V - maintains correct logic state even during severe undervoltage conditions |
| Transient Immunity | Negative-going VCC glitch rejection - prevents spurious resets from short-duration supply noise |
Pinout & Package
MAX6381XR29D3/GG8 is housed in a RoHS-compliant 3-pin SC70 package (package code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low when VCC < 2.93V; deasserts high after 140ms timeout - directly interfaces with standard μP reset inputs |
| 2 | VCC | Primary supply input and monitored rail - accepts +1.0V to +5.5V; powers internal circuitry and reference |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery runtime in always-on portable devices without compromising supervision integrity |
| Valid reset output at low VCC | Guaranteed logic state down to VCC = 1V - ensures deterministic behavior during deep brownout recovery |
| Push-pull active-low output | No external pullup required - simplifies layout, reduces component count, and improves noise immunity vs. open-drain alternatives |
| Negative transient immunity | Rejects sub-100µs VCC glitches below threshold - avoids false resets in electrically noisy environments |
Applications
| Battery-Powered Instrumentation | Industrial Controller Power Monitoring |
|---|---|
Use Scenario: Handheld multimeter with Li-ion battery and low-power MCU requiring reliable power-on reset and brownout protection. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to MCU until regulated 3.3V rail stabilizes above 2.93V for ≥140ms. Use Value: Prevents erratic MCU boot due to slow-rising battery voltage; 3μA supply current extends operational life between charges. | Use Scenario: PLC I/O module operating in harsh factory environments with fluctuating 24VDC-derived 3.3V supply. IC Role / Device Role / Timing Role: Monitors 3.3V domain and holds MCU in reset during voltage sags below 2.93V, with 140ms timeout ensuring stable firmware load. Use Value: ±2.5% threshold accuracy over –40°C to +125°C prevents false resets in uncontrolled ambient conditions. |
| Portable Medical Sensor Node | Automotive Body Control Module (BCM) |
Use Scenario: Wearable ECG sensor using coin-cell battery and ultra-low-power ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation when battery voltage drops below 2.93V, with push-pull output driving MCU reset pin directly. Use Value: Eliminates need for external pullup resistor - saves board area and reduces leakage path in sleep mode. | Use Scenario: 12V automotive subsystem with LDO-regulated 3.3V rail powering infotainment microcontroller. IC Role / Device Role / Timing Role: Detects brownout on 3.3V rail and asserts reset for ≥140ms to ensure clean restart after load-dump transients. Use Value: Negative-going VCC transient immunity prevents spurious resets during alternator switching events. |
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 | 2.93V threshold, 140ms timeout, same 3-pin SC70 package, but ±3% threshold accuracy over –40°C to +85°C only | Limited temperature range support - not qualified for extended industrial or automotive use | Select when cost sensitivity outweighs wide-temp performance requirements |
| TPS3808G33DBVR | 3.3V threshold (not 2.93V), 200ms timeout, SOT-23-5 package, 1.8μA typical ICC at 3.3V | Higher threshold and different timeout - requires redesign of power sequencing timing and may not detect early brownout | Choose only if system operates strictly at 3.3V and longer timeout is acceptable |
Compared with MAX809TRD3+T, MAX6381XR29D3/GG8 offers tighter threshold accuracy over wider temperature range; compared with TPS3808G33DBVR, it provides exact 2.93V detection and shorter 140ms timeout for faster system recovery - both advantages critical in battery-critical and automotive-grade designs.
Availability
MAX6381XR29D3/GG8 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller power monitoring, and portable medical sensor nodes requiring stable component supply with AEC-Q100-compatible sourcing options.
Supply support for MAX6381XR29D3/GG8 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 demanding industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 product line delivers single- and dual-supply microprocessor supervisory circuits optimized for space-constrained, low-quiescent-current embedded systems requiring robust power-up/down sequencing and brownout protection.
FAQ
What is the reset threshold voltage of MAX6381XR29D3/GG8 and how accurate is it over temperature?
The MAX6381XR29D3/GG8 has a factory-set reset threshold of 2.93V with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This specification is guaranteed by design and ensures consistent brownout detection across automotive and industrial environments without requiring external calibration. The MAX6381XR29D3/GG8 achieves this via laser-trimmed internal references and BiCMOS process stability.
Does MAX6381XR29D3/GG8 include a manual reset input (MR) or auxiliary RESET IN pin?
No, MAX6381XR29D3/GG8 does not include a manual reset input or auxiliary RESET IN pin. It belongs to the base MAX6381 variant group configured exclusively for single-supply monitoring via VCC only. These functions are present only in higher-pin-count versions such as MAX6384 (MR enabled, 4-pin SC70) or MAX6387 (RESET IN enabled, 4-pin SC70). The MAX6381XR29D3/GG8 uses a minimal 3-pin SC70 footprint with RESET, VCC, and GND only.
What is the minimum reset timeout period for MAX6381XR29D3/GG8 and how is it implemented?
The MAX6381XR29D3/GG8 provides a minimum reset timeout period of 140ms (suffix D3), implemented via an internal RC timer that keeps the active-low RESET output asserted for ≥140ms after VCC rises above the 2.93V threshold. This timeout is monotonic over temperature and process variation, ensuring reliable μP initialization across all operating conditions. The MAX6381XR29D3/GG8 does not require external timing components.
Can MAX6381XR29D3/GG8 operate with supply voltages below 1.8V?
Yes, MAX6381XR29D3/GG8 operates from +1.0V to +5.5V, and its reset output remains valid down to VCC = 1.0V. At 1.8V, supply current is 3μA; at 1.0V, functionality is maintained though current drops further. This allows use in deep-brownout scenarios where other supervisors fail - for example, during final battery discharge in coin-cell applications. The MAX6381XR29D3/GG8 guarantees correct logic state even at VCC = 1V.
Is MAX6381XR29D3/GG8 RoHS-compliant and what package does it use?
Yes, MAX6381XR29D3/GG8 is RoHS-compliant and carries the "+" suffix indicating lead-free packaging. It is supplied in a 3-pin SC70 package (code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, with exposed pad option unavailable in this variant. The package meets JEDEC MO-203 standards and is compatible with standard reflow soldering profiles including peak temperature up to +260°C.
MAX6381XR29D3/GG8 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:
- 2.93V
- 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
MAX6381XR29D3/GG8 FAQ
1.How can I place an order for MAX6381XR29D3/GG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381XR29D3/GG8 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 MAX6381XR29D3/GG8 reliable?
The price and inventory of MAX6381XR29D3/GG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381XR29D3/GG8 is usually 5 days.
3.What payment methods are accepted for MAX6381XR29D3/GG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381XR29D3/GG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381XR29D3/GG8?
MAX6381XR29D3/GG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381XR29D3/GG8 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 MAX6381XR29D3/GG8?
For technical support, including MAX6381XR29D3/GG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381XR29D3/GG8 requirements.
6.How does Aetrix verify that MAX6381XR29D3/GG8 is sourced from the original manufacturer or authorized distributors?
All MAX6381XR29D3/GG8 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 MAX6381XR29D3/GG8 meets industry standards.
7.What is the process for return or replacement of MAX6381XR29D3/GG8?
All MAX6381XR29D3/GG8 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381XR29D3/GG8, 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 MAX6381XR29D3/GG8 part is unused and in its original packaging.
Return procedure for MAX6381XR29D3/GG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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