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Analog Devices Inc./Maxim Integrated MAX6383XR29D3+T
- Part No.:
- MAX6383XR29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6383XR29D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,139
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Product details
Overview
MAX6383XR29D3+T from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit with factory-set 2.93V reset threshold and 140ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V, consumes only 3μA at +1.8V, guarantees valid reset output down to VCC = 1V, and is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6383XR29D3+T datasheet, MAX6383XR29D3+T pinout, MAX6383XR29D3+T application, or MAX6383XR29D3+T equivalent, key selection considerations include its open-drain reset output requiring external pullup, ±2.5% reset threshold accuracy over –40°C to +125°C, 140ms VCC reset timeout, 3-pin SC70 package, and compatibility with dual-voltage monitoring systems when paired with auxiliary components.
Technical Context
The MAX6383XR29D3+T implements a precision voltage comparator with internal 2.93V reference and hysteresis-free detection, asserting reset when VCC falls below threshold and holding it for ≥140ms after VCC recovers. Its open-drain RESET output requires an external pullup resistor and supports mixed-voltage I/O interfacing (e.g., 3.3V system driving 1.8V μP reset input).
No manual reset (MR) or auxiliary RESET IN inputs are integrated - this variant is optimized for minimal footprint and single-supply monitoring only. The device operates across –40°C to +125°C and maintains guaranteed logic state validity down to VCC = 1V, enabling robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (±2.5% over –40°C to +125°C); ensures reliable detection of 3.0V rail collapse before system instability. |
| Reset Timeout Period | 140ms minimum; provides sufficient hold time for slow-ramping power supplies and flash memory initialization. |
| Supply Current | 3μA at +1.8V; enables multi-year battery life in portable IoT sensors and wearables. |
| Operating Voltage Range | +1.0V to +5.5V; supports operation during severe undervoltage while maintaining reset assertion integrity. |
| Output Type | Open-drain active-low; allows wired-OR configuration, level shifting, and shared reset bus implementation. |
| Package | 3-pin SC70 (X3+2 outline); occupies <0.8 mm² PCB area, suitable for space-constrained portable designs. |
| Temperature Range | –40°C to +125°C; qualified for automotive under-hood and industrial control environments. |
Pinout & Package
MAX6383XR29D3+T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with pins arranged in a single row: Pin 1 = RESET (open-drain active-low), Pin 2 = VCC, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Must be pulled up externally; sinks ≤3.2mA at VCC ≥4.5V; asserts low during VCC undervoltage or brownout. |
| 2 - VCC | Power supply input and monitored voltage rail | Supplies internal circuitry and serves as primary reset trigger source; accepts 1.0V–5.5V with guaranteed operation down to 1V. |
| 3 - GND | Ground reference | Common return path for internal biasing and reset comparator; must be low-impedance for noise immunity. |
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 life in always-on edge nodes without compromising supervision reliability. |
| Guaranteed reset validity | RESET output state remains valid down to VCC = 1V - prevents spurious release during deep brownout recovery. |
| Negative-going transient immunity | Rejects VCC glitches <140µs wide at 100mV overdrive - avoids false resets in electrically noisy environments. |
| Small-footprint packaging | 3-pin SC70 (0.65mm pitch, 1.25 × 0.85mm) - saves board space versus SOT-23 alternatives while enabling automated assembly. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from coin-cell battery with 2.8V nominal rail subject to load-induced sag. IC Role / Device Role / Timing Role: Supervises VCC and asserts open-drain reset to ARM Cortex-M0+ MCU until stable 2.8V is confirmed. Use Value: 2.93V threshold detects sag before ADC reference drift occurs; 140ms timeout accommodates slow LDO startup. |
Use Scenario: DIN-rail mounted analog input module powered by isolated 3.3V DC/DC converter with variable load transients. IC Role / Device Role / Timing Role: Monitors 3.3V supply and holds microcontroller in reset during brief dips caused by relay switching. Use Value: ±2.5% threshold accuracy ensures consistent trip point across temperature; open-drain output interfaces cleanly with 5V-tolerant FPGA reset pin. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: BCM sub-module powered from vehicle battery via 3.3V LDO, exposed to cold-crank (4.5V) and load-dump (18V) events. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold-crank undervoltage; tolerant to VCC = 1V operation. Use Value: Valid reset down to 1V prevents MCU runaway during cranking; AEC-Q100-compatible SC70 package meets automotive reliability requirements. |
Use Scenario: Revenue-grade meter with dual-rail design (3.3V MCU + 1.8V metrology ASIC), requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V rail; open-drain output enables OR-ing with secondary supervisor on 1.8V rail. Use Value: Small SC70 footprint conserves space on high-density meter PCB; 3μA supply current minimizes self-heating impact on metrology accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR29D3+T | Same 2.93V threshold and 140ms timeout, but push-pull active-low output; no external pullup required. | Suitable where shared reset bus is not needed and board layout prohibits external resistor placement. | Select MAX6326XR29D3+T if push-pull drive simplifies BOM and eliminates pullup component; verify VCC compatibility (max 5.5V same). |
| TPS3808G33DBVR | 2.93V threshold, 200ms timeout (not 140ms); 1.8V–6.0V VCC range; 2.5μA typical ICC at 3.3V. | Better suited for higher-VCC systems (>5.5V) and applications needing longer timeout for complex boot sequences. | Choose TPS3808G33DBVR when extended timeout or wider VCC range is critical; note different pinout (SOT-23-5) and no SC70 option. |
Compared with MAX6383XR29D3+T, MAX6326XR29D3+T removes the need for an external pullup but forfeits wired-OR capability, while TPS3808G33DBVR offers broader voltage support and lower typical current but lacks the ultra-small SC70 footprint and exact 140ms timing match.
Availability
MAX6383XR29D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6383XR29D3+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 demanding industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for space-constrained, battery-sensitive, and thermally harsh environments - targeting applications where deterministic power-up sequencing and brownout resilience are non-negotiable.
FAQ
What is the exact reset threshold voltage of MAX6383XR29D3+T?
The MAX6383XR29D3+T has a factory-set nominal reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The "29" suffix in MAX6383XR29D3+T explicitly denotes the 2.93V threshold per Maxim's ordering guide.
Does MAX6383XR29D3+T include a manual reset input (MR)?
No, MAX6383XR29D3+T does not feature a manual reset input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which lacks MR functionality. Manual reset capability is only present in MAX6384–MAX6390 variants (e.g., MAX6384XR29D3+T). The MAX6383XR29D3+T is designed exclusively for VCC-only supervision with minimal pin count.
What package type and dimensions does MAX6383XR29D3+T use?
MAX6383XR29D3+T is supplied in a 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), measuring 1.25mm × 0.85mm with 0.65mm pin pitch. This RoHS-compliant, lead-free package supports reflow soldering and is optimized for high-density PCB layouts in portable electronics.
Can MAX6383XR29D3+T monitor a second voltage rail?
No, MAX6383XR29D3+T does not support auxiliary voltage monitoring. It monitors only the VCC pin. Dual-rail supervision requires variants with RESET IN functionality - specifically MAX6387, MAX6388, or MAX6389 - which compare an external divider network against an internal 1.27V reference. MAX6383XR29D3+T is a single-supply supervisor only.
What is the minimum VCC voltage at which MAX6383XR29D3+T guarantees correct reset output behavior?
MAX6383XR29D3+T guarantees valid RESET output logic state down to VCC = 1.0V. Below this, the internal comparator and driver may become indeterminate. This specification ensures reliable reset assertion during deep brownout conditions common in battery-powered systems, distinguishing it from supervisors that cease operation near 1.8V.
MAX6383XR29D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- 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
MAX6383XR29D3+T FAQ
1.How can I place an order for MAX6383XR29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383XR29D3+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 MAX6383XR29D3+T reliable?
The price and inventory of MAX6383XR29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383XR29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6383XR29D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6383XR29D3+T transactions.
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4.How is shipping managed for MAX6383XR29D3+T?
MAX6383XR29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383XR29D3+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 MAX6383XR29D3+T?
For technical support, including MAX6383XR29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383XR29D3+T requirements.
6.How does Aetrix verify that MAX6383XR29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6383XR29D3+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 MAX6383XR29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6383XR29D3+T?
All MAX6383XR29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383XR29D3+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 MAX6383XR29D3+T part is unused and in its original packaging.
Return procedure for MAX6383XR29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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