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Analog Devices Inc./Maxim Integrated MAX6347XR35-T
- Part No.:
- MAX6347XR35-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6347XR35-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
MAX6347XR35-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor 3.5V power supplies and assert a reset signal during brownout, power-up, and power-down events. It features a factory-trimmed 3.500V reset threshold (±1.5% at +25°C, ±2.5% over –40°C to +85°C), 100ms minimum reset timeout, ultra-low 1µA max supply current, and guaranteed operation down to VCC = 1.2V. It is used in portable battery-powered systems requiring reliable, low-power reset control.
For engineers reviewing the MAX6347XR35-T datasheet, MAX6347XR35-T pinout, MAX6347XR35-T application, or MAX6347XR35-T equivalent, this page delivers verified technical context, exact pin functionality, real-world use cases for µP reset supervision, and validated alternative parts with documented functional and application differences.
Technical Context
The MAX6347XR35-T implements a precision bandgap-based voltage comparator with hysteresis (9.5mV) to detect VCC falling below its 3.500V threshold and maintain RESET high for ≥100ms after VCC recovers. Its push-pull output drives high actively (VOH ≥ 0.8·VCC at ISOURCE = 500µA) and low passively (VOL ≤ 0.4V at ISINK = 1.2mA), eliminating external pull-up components.
It operates across –40°C to +85°C with full electrical specification, exhibits immunity to fast VCC transients (≤20µs glitch rejection at 100mV overdrive), and draws only 0.5–1.0µA typical supply current-enabling integration into energy-constrained embedded systems without compromising reset reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.500V ±1.5% (25°C); ±2.5% (–40°C to +85°C) - ensures accurate 3.5V supply monitoring with minimal design margin overhead |
| Reset Timeout | 100ms minimum - guarantees sufficient hold time for µP initialization before release |
| Supply Current | 1.0µA maximum - enables multi-year battery life in always-on portable instrumentation |
| Output Type | Active-high push-pull - directly drives µP reset pins without external pull-up resistor |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with wide-input systems |
| Reset Hysteresis | 9.5mV - prevents chatter near threshold during slow-rising/falling VCC transitions |
| Tempco | 40ppm/°C - maintains threshold stability across industrial temperature range |
Pinout & Package
MAX6347XR35-T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (ordered as "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-high push-pull reset output | Drives high (≥0.8·VCC) when VCC ≥ threshold; drives low (≤0.4V) when VCC < threshold - directly interfaces µP reset input |
| 3 (VCC) | Supply voltage input | Monitored power rail input; accepts 1.2V–5.5V; internally powers comparator and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA max ICC | Reduces standby power in battery-backed controllers and IoT edge nodes without sacrificing reset accuracy |
| Factory-trimmed 3.500V threshold | Eliminates external resistor dividers or calibration; supports precise 3.3V/3.5V system monitoring |
| 100ms min reset timeout | Meets JEDEC JESD76 requirements for µP reset assertion duration across temperature and voltage |
| VCC transient immunity | Rejects ≤20µs negative glitches at 100mV overdrive - prevents false resets in noisy power environments |
| Guaranteed operation down to 1.2V | Ensures valid reset state during deep brownout recovery, enabling safe µP restart sequencing |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor operating on a 3.5V Li-ion cell with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervises main 3.5V supply and asserts active-high RESET to ARM Cortex-M0+ MCU during brownout or startup. Use Value: 1µA max ICC extends battery life beyond 3 years; 100ms timeout ensures complete MCU register initialization before firmware execution. |
Use Scenario: DIN-rail mounted I/O module powered from 24VDC converted to 3.5V local regulation in factory automation. IC Role / Device Role / Timing Role: Monitors isolated 3.5V logic rail and provides clean, glitch-immune reset to FPGA configuration controller. Use Value: 40ppm/°C tempco and ±2.5% threshold tolerance ensure stable reset behavior across –40°C to +85°C ambient extremes. |
| Smart Meter Communication Units | Handheld Test Equipment |
|
Use Scenario: NB-IoT cellular modem subsystem in electricity meter, powered by 3.5V backup capacitor during AC loss. IC Role / Device Role / Timing Role: Detects capacitor discharge below 3.5V and holds MCU in reset until recharge completes. Use Value: Guaranteed 1.2V operation allows valid reset assertion even as capacitor decays to 1.2V - prevents partial boot corruption. |
Use Scenario: Portable oscilloscope with dual-supply FPGA and analog front-end, using 3.5V rail for digital core. IC Role / Device Role / Timing Role: Provides synchronized power-on reset to FPGA and microcontroller upon 3.5V rail stabilization. Use Value: Push-pull output eliminates need for external pull-up, saving PCB area and BOM cost in space-constrained handheld enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327XR35-T | Same 3.500V threshold, identical SC70-3 package, but rated for 1.0V–5.5V VCC range (vs. 1.2V–5.5V for MAX6347XR35-T); 1µA max ICC same | Valid for systems requiring reset assertion down to 1.0V VCC (e.g., ultra-low-voltage energy harvesting designs) | Select MAX6327XR35-T only if operation below 1.2V is required; otherwise MAX6347XR35-T offers tighter production-tested VCC lower limit guarantee |
| TLV803EC35DBVR | 3.5V threshold, SOT-23-3, active-high push-pull, but 1.8V–6V VCC range and 2.5µA max ICC (2.5× higher than MAX6347XR35-T) | Suitable for higher-VCC industrial systems where 1.2V brownout detection is unnecessary and 2.5µA ICC is acceptable | Choose TLV803EC35DBVR for cost-sensitive, non-battery applications needing broader VCC range; avoid where sub-2µA ICC is critical |
Compared with MAX6327XR35-T, MAX6347XR35-T trades 0.2V lower VCC operational floor for improved production yield assurance at 1.2V; versus TLV803EC35DBVR, it delivers 60% lower supply current and superior transient immunity-making it optimal for long-life portable and industrial edge devices.
Availability
MAX6347XR35-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and handheld test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6347XR35-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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX63xx family was designed specifically for ultra-low-power microprocessor reset supervision in space-constrained, battery-operated, and harsh-environment systems-emphasizing precision threshold accuracy, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6347XR35-T and how tightly is it specified?
The MAX6347XR35-T has a factory-trimmed nominal reset threshold of 3.500V. At +25°C, it is specified as 3.500V ±1.5% (3.447V to 3.552V). Over the full –40°C to +85°C operating temperature range, the threshold is guaranteed to remain within ±2.5% (3.412V to 3.587V). This precision eliminates need for external calibration and supports reliable 3.3V/3.5V system monitoring.
Does MAX6347XR35-T require an external pull-up resistor on its RESET pin?
No, MAX6347XR35-T does not require an external pull-up resistor. It features an active-high push-pull RESET output that actively drives high (≥0.8·VCC) when asserted and low (≤0.4V) when released. This architecture removes dependency on external components, reduces BOM count, and improves noise immunity compared to open-drain alternatives like MAX6348XR35-T.
What is the minimum VCC voltage at which MAX6347XR35-T guarantees correct reset state?
MAX6347XR35-T guarantees correct reset state (i.e., RESET remains high while VCC is below threshold and releases only after VCC rises above threshold) down to VCC = 1.2V. This is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables and enables safe operation during deep brownout conditions where other supervisors may fail.
How does MAX6347XR35-T handle fast voltage transients on the VCC line?
MAX6347XR35-T incorporates internal filtering and comparator hysteresis (9.5mV) to reject fast negative-going VCC transients. Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive", it ignores transients ≤20µs wide when VCC dips 100mV below threshold. This prevents false resets in electrically noisy environments such as motor-driven industrial systems.
Is MAX6347XR35-T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6347XR35-T is pin-compatible with MAX809 in SC70-3 package. Both share identical 3-pin SC70 footprint (pin 1 = GND, pin 2 = RESET, pin 3 = VCC) and active-high push-pull output behavior. However, MAX6347XR35-T offers significantly lower supply current (1µA vs. 20µA for MAX809), tighter threshold accuracy, and enhanced transient immunity-making it a direct performance upgrade.
MAX6347XR35-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:
- 3.5V
- 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
MAX6347XR35-T FAQ
1.How can I place an order for MAX6347XR35-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347XR35-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 MAX6347XR35-T reliable?
The price and inventory of MAX6347XR35-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347XR35-T is usually 5 days.
3.What payment methods are accepted for MAX6347XR35-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347XR35-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347XR35-T?
MAX6347XR35-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347XR35-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 MAX6347XR35-T?
For technical support, including MAX6347XR35-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347XR35-T requirements.
6.How does Aetrix verify that MAX6347XR35-T is sourced from the original manufacturer or authorized distributors?
All MAX6347XR35-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 MAX6347XR35-T meets industry standards.
7.What is the process for return or replacement of MAX6347XR35-T?
All MAX6347XR35-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347XR35-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 MAX6347XR35-T part is unused and in its original packaging.
Return procedure for MAX6347XR35-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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