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Analog Devices Inc./Maxim Integrated MAX6347XR39-T
- Part No.:
- MAX6347XR39-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6347XR39-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
MAX6347XR39-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when VCC falls below 3.9V, maintaining reset for ≥100ms after VCC recovers; it operates from 1.2V to 5.5V, draws ≤1µA supply current, and is housed in a 3-pin SC70 package for space-constrained embedded power monitoring.
For engineers reviewing the MAX6347XR39-T datasheet, MAX6347XR39-T pinout, MAX6347XR39-T application, or MAX6347XR39-T equivalent, this device serves as a precision, ultra-low-power reset supervisor for 3.3V/5V systems requiring guaranteed reset assertion down to 1.2V, immunity to fast VCC transients, and factory-trimmed threshold accuracy of ±2.5% over temperature.
Technical Context
The MAX6347XR39-T implements a precision bandgap-based reset comparator with 3.9V nominal threshold (±2.5% over −40°C to +85°C), 40ppm/°C tempco, and 6.3mV hysteresis to prevent chatter during brownout recovery. Its push-pull output drives high during reset and low otherwise, eliminating external pull-up components.
It features 20µs VCC-to-reset delay, 100–280ms power-up reset timeout, and transient immunity validated up to 100µs at 100mV overdrive. The device remains fully functional with VCC as low as 1.2V and guarantees correct reset state down to 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.90V ±2.5% over −40°C to +85°C - ensures reliable reset activation for 3.3V/5V systems under full industrial temperature range |
| Supply Current | ≤1.0µA at VCC = 3.2V - enables multi-year battery life in portable equipment without compromising supervision integrity |
| Reset Timeout | 100ms minimum power-on reset pulse width - satisfies µP reset timing requirements per Intel/ARM specifications |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 1.2V logic domains |
| Output Type | Active-high push-pull - provides rail-to-rail drive without external pull-up, simplifying interface to µP reset inputs |
| Package | 3-pin SC70-3 (X3-2 outline) - 1.25mm × 0.85mm footprint ideal for wearables and compact IoT nodes |
| Reset Hysteresis | 6.3mV - prevents oscillatory reset behavior during slow VCC recovery near threshold |
Pinout & Package
MAX6347XR39-T is packaged in a 3-pin SC70-3 (X3-2 outline) with 1.25mm × 0.85mm body size, 0.65mm pitch, and exposed pad not present. Pin 1 = GND, Pin 2 = RESET (active-high push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected directly to system ground plane |
| 2 | RESET | Active-high push-pull output; drives high during reset condition (VCC < 3.9V) and low otherwise; no external pull-up required |
| 3 | VCC | Primary supply input; powers internal circuitry and defines reset threshold reference; accepts 1.2V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.9V threshold | Guaranteed ±2.5% accuracy across −40°C to +85°C eliminates manual calibration and reduces BOM count |
| Ultra-low 1µA max ICC | Enables permanent connection to coin-cell or energy-harvesting sources without measurable drain impact |
| 100ms min reset timeout | Meets JEDEC JESD78 and ARM CoreTile reset timing requirements for deterministic boot initialization |
| VCC transient immunity | Rejects negative-going glitches ≤100µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Push-pull active-high output | Directly interfaces with µP reset pins requiring active-high assertion (e.g., NXP i.MX RT series) without level-shifting |
Applications
| Industrial PLC I/O Module | Medical Wearable Sensor Node |
|---|---|
Use Scenario: Power supervision during cold-start and battery voltage sag in DIN-rail mounted I/O modules. IC Role / Device Role / Timing Role: Resets programmable logic controller (PLC) CPU and FPGA configuration upon undervoltage detection. Use Value: Prevents corrupted register states and firmware lockup by enforcing 100ms minimum reset hold time during 3.3V rail instability. |
Use Scenario: Continuous ECG/PPG monitoring powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output feeding MCU and analog front-end; asserts reset if battery drops below 3.9V. Use Value: Extends usable battery life by enabling sleep-mode operation down to 1.2V while guaranteeing clean restart above 3.9V threshold. |
| Smart Energy Meter MCU | Automotive Body Control Module (BCM) |
Use Scenario: Monitoring 5V auxiliary rail derived from vehicle battery in residential smart meter designs. IC Role / Device Role / Timing Role: Generates reset pulse to ARM Cortex-M4 MCU when 5V rail dips due to load switching or cold-cranking. Use Value: Ensures deterministic firmware boot after brownout events using factory-trimmed 3.9V threshold matched to 5V regulator dropout margin. |
Use Scenario: Reset supervision for LIN transceiver and microcontroller in door module during ignition cycling. IC Role / Device Role / Timing Role: Active-high push-pull output directly drives BCM MCU's dedicated reset pin without external components. Use Value: Eliminates need for discrete pull-up resistor and saves PCB area in constrained automotive junction box layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327XR39-T | Same 3.9V threshold, identical SC70-3 package, but rated only for 0°C to +70°C industrial range (vs. −40°C to +85°C) | Limited to commercial-temperature applications; unsuitable for automotive or outdoor industrial use | Select MAX6347XR39-T when extended temperature operation or full industrial qualification is required |
| TPS3123QDBVRQ1 | 3.9V threshold, AEC-Q100 Grade 2 qualified, 1.8µA typical ICC, open-drain output requiring external pull-up | Designed for automotive systems; lacks push-pull drive and exceeds MAX6347XR39-T's 1µA max ICC | Choose TPS3123QDBVRQ1 only when AEC-Q100 compliance is mandatory and open-drain interface is acceptable |
Compared with MAX6327XR39-T, the MAX6347XR39-T offers full −40°C to +85°C operation and tighter production screening; versus TPS3123QDBVRQ1, it delivers lower quiescent current and push-pull simplicity at the cost of automotive qualification.
Availability
MAX6347XR39-T is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, smart energy meters, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6347XR39-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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and communications, now part of Analog Devices since 2021.
The MAX6347XR39-T belongs to Maxim's ultra-low-power µP supervisory family, designed specifically for reliable, single-function reset generation in battery-powered and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6347XR39-T?
The MAX6347XR39-T has a factory-trimmed nominal reset threshold of 3.90V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range of −40°C to +85°C. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "R39" suffix variant.
Does the MAX6347XR39-T require an external pull-up resistor on its RESET pin?
No, the MAX6347XR39-T features an active-high push-pull output, so it drives both high and low states internally. Unlike open-drain supervisors, the MAX6347XR39-T does not require an external pull-up resistor, reducing component count and board space.
Can the MAX6347XR39-T operate reliably at VCC = 1.5V?
Yes, the MAX6347XR39-T is fully specified to operate down to VCC = 1.2V and guarantees correct reset state functionality down to 1.0V. At 1.5V, it maintains accurate 3.9V threshold monitoring and produces valid reset pulses, making it suitable for ultra-low-voltage brownout detection.
What is the maximum transient duration the MAX6347XR39-T can ignore on the VCC line?
The MAX6347XR39-T ignores negative-going VCC transients up to 100µs in duration when the overdrive (VTH − VCC) is 100mV, as shown in Figure 4 of the datasheet. This immunity increases for smaller overdrive magnitudes, preventing false resets in electrically noisy environments.
Is the MAX6347XR39-T pin-compatible with the MAX809 or MAX810 series?
No, the MAX6347XR39-T is not pin-compatible with MAX809/MAX810. While all are 3-pin reset supervisors, MAX809/MAX810 use SOT23-3 with different pinout (VCC–GND–RESET), whereas MAX6347XR39-T in SC70-3 uses GND–RESET–VCC. Physical layout and signal routing differ significantly.
MAX6347XR39-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:
- 3.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6347XR39-T FAQ
1.How can I place an order for MAX6347XR39-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347XR39-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 MAX6347XR39-T reliable?
The price and inventory of MAX6347XR39-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347XR39-T is usually 5 days.
3.What payment methods are accepted for MAX6347XR39-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347XR39-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347XR39-T?
MAX6347XR39-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347XR39-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 MAX6347XR39-T?
For technical support, including MAX6347XR39-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347XR39-T requirements.
6.How does Aetrix verify that MAX6347XR39-T is sourced from the original manufacturer or authorized distributors?
All MAX6347XR39-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 MAX6347XR39-T meets industry standards.
7.What is the process for return or replacement of MAX6347XR39-T?
All MAX6347XR39-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347XR39-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 MAX6347XR39-T part is unused and in its original packaging.
Return procedure for MAX6347XR39-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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