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Analog Devices Inc./Maxim Integrated MAX6347XR37-T
- Part No.:
- MAX6347XR37-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6347XR37-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
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Product details
Overview
MAX6347XR37-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 3.7V (±2.5% over temperature), maintaining reset for ≥100ms after VCC recovers; it draws ≤1µA supply current, operates from 1.2V to 5.5V, and is housed in a 3-pin SC70 package for portable and battery-powered systems.
For engineers reviewing the MAX6347XR37-T datasheet, MAX6347XR37-T pinout, MAX6347XR37-T application, or MAX6347XR37-T equivalent, this device serves as a precision, ultra-low-power reset supervisor for 3.3V and 5V digital systems requiring guaranteed reset assertion down to 1V VCC, immunity to fast transients, and factory-trimmed threshold accuracy.
Technical Context
The MAX6347XR37-T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 9.5mV hysteresis, ensuring stable threshold behavior across -40°C to +85°C. Its active-high push-pull output drives high during reset (≥0.8·VCC at 500µA) and low when not asserted (≤0.4V at 3.2mA), eliminating external pull-up components.
It features transient immunity: negative-going VCC glitches up to 200µs (at 200mV overdrive) are ignored, and power-on reset timeout is guaranteed ≥100ms with no external timing components. The device remains functional and correctly latched down to VCC = 1.2V, supporting brownout detection in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.700V ±2.5% over -40°C to +85°C - ensures reliable reset activation for 3.3V systems with margin against rail sag |
| Supply Current | ≤1.0µA max at 3V - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 100ms to 280ms - guarantees sufficient processor initialization time after power stabilization |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 2.5V/3.3V/5V rails |
| Output Type | Active-high push-pull - drives high during reset without external pull-up, simplifying interface to µP reset inputs |
| Threshold Hysteresis | 9.5mV - prevents chatter near threshold during slow VCC recovery or noise |
| Transient Immunity | Rejects <200µs negative VCC glitches at 200mV overdrive - suppresses switching noise-induced false resets |
Pinout & Package
MAX6347XR37-T is packaged in a 3-pin SC70-3 (X3-2 outline), 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 connected directly to system ground plane |
| 2 (RESET) | Active-high reset output | Drives high during reset condition (VCC < 3.7V); sinks current when deasserted; compatible with standard µP reset inputs |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; internally monitored for reset generation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.700V with ±1.5% tolerance at +25°C and ±2.5% over full temperature range - eliminates calibration overhead |
| Ultra-low quiescent current | ≤1µA max - reduces standby power in battery-critical applications such as IoT sensors and wearables |
| No external components required | Integrated timing capacitor and comparator - reduces BOM count and PCB area vs. discrete reset solutions |
| Push-pull active-high output | Eliminates need for external pull-up resistor - simplifies routing and improves noise immunity on reset line |
| Guaranteed reset state down to 1.2V VCC | Ensures valid reset assertion even during severe brownout - prevents undefined µP startup states |
Applications
| Industrial PLC Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers exposed to fluctuating 24V DC rails converted to 3.3V logic. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high signal to ARM Cortex-M7 MCU upon undervoltage detection. Use Value: Prevents firmware corruption during brownout by guaranteeing ≥100ms reset hold time while consuming <1µA between events. |
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring multi-year shelf life and reliable cold-start behavior. IC Role / Device Role / Timing Role: Primary VCC monitor for MSP430 microcontroller, triggering reset if coin-cell voltage drops below 3.7V threshold. Use Value: Enables single-supply operation with no external biasing, extending usable battery capacity by minimizing quiescent drain. |
| Network Edge Routers | Smart Energy Meters |
Use Scenario: 3.3V core supply supervision in fanless edge routers subject to thermal cycling and EFT noise. IC Role / Device Role / Timing Role: Reset supervisor interfacing directly to Broadcom BCM58XXX SoC reset pin via push-pull drive. Use Value: 9.5mV hysteresis and 200µs transient rejection prevent spurious resets from switching regulator ripple or ESD coupling. |
Use Scenario: Tamper-resistant electricity meter with dual-supply (battery backup + mains-derived 3.3V) requiring fail-safe reset coordination. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and asserts reset to TI MSP430FR5994 if voltage sags during load switching transients. Use Value: Factory-trimmed 3.7V threshold provides precise margin above 3.3V nominal, avoiding premature reset during normal regulation tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327XR37-T | Same 3.7V threshold, identical SC70-3 package and push-pull active-high output, but rated for 0°C to +70°C industrial range only | Limited to commercial-temperature environments; unsuitable for extended outdoor or automotive under-hood use | Select MAX6327XR37-T only if operating ambient stays within 0°C–70°C and cost sensitivity outweighs temperature margin |
| TLV803EC37DBVR | 3.7V active-high push-pull reset IC in SOT-23-3, but higher 3.5µA max ICC and ±3% threshold tolerance over temperature | Higher supply current reduces battery lifetime; looser threshold spec increases risk of marginal reset timing in 3.3V systems | Choose TLV803EC37DBVR only if legacy SOT-23 footprint reuse is mandatory and 1µA current is not critical |
Compared with MAX6347XR37-T, MAX6327XR37-T sacrifices extended temperature coverage for lower cost, while TLV803EC37DBVR trades ultra-low power and tight threshold accuracy for broader distributor availability and SOT-23 compatibility - neither offers pin-to-pin equivalence or identical performance envelope.
Availability
MAX6347XR37-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, network edge routers, smart energy meters, and battery-backed embedded systems requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6347XR37-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 power, sensing, and interface applications, with emphasis on high-reliability, low-power solutions for industrial and computing markets.
The MAX63xx family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor-based systems, targeting applications where supply stability, battery longevity, and deterministic startup behavior are critical design requirements.
FAQ
What is the exact reset threshold voltage of MAX6347XR37-T and how tightly is it specified?
The MAX6347XR37-T has a nominal reset threshold of 3.700V, specified as ±1.5% at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This corresponds to a minimum threshold of 3.607V and maximum of 3.792V at temperature extremes, enabling robust brownout detection for 3.3V systems with defined safety margin.
Does MAX6347XR37-T require any external components to function as a reset supervisor?
No, MAX6347XR37-T requires zero external components. It integrates the precision voltage reference, comparator, reset timer capacitor, and push-pull output driver into a single 3-pin SC70 package. No pull-up resistors, timing capacitors, or trimming networks are needed - simplifying layout and reducing BOM cost.
How does the active-high push-pull output of MAX6347XR37-T interface with common microcontrollers?
The MAX6347XR37-T's active-high push-pull RESET pin drives high (≥0.8·VCC) during reset and pulls low (<0.4V) when released, matching the native reset input polarity of most ARM, MSP430, and PIC microcontrollers. This eliminates level-shifting or inversion logic and avoids reliance on weak internal pull-ups.
What is the minimum VCC voltage at which MAX6347XR37-T guarantees correct reset assertion?
MAX6347XR37-T guarantees correct reset assertion and output state integrity down to VCC = 1.2V across the full -40°C to +85°C temperature range. This ensures reliable operation during deep brownout conditions where other supervisors may fail to latch or assert reset properly.
Is MAX6347XR37-T compatible with lead-free PCB assembly processes?
Yes, MAX6347XR37-T is supplied in RoHS-compliant, lead-free packaging. The "-T" suffix denotes tape-and-reel packaging with lead-free terminations; for explicit lead-free ordering, replace "-T" with "+T" per Maxim's ordering convention, and the device supports standard Pb-free reflow profiles up to +260°C peak.
MAX6347XR37-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:
- 3.7V
- 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
MAX6347XR37-T FAQ
1.How can I place an order for MAX6347XR37-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347XR37-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 MAX6347XR37-T reliable?
The price and inventory of MAX6347XR37-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347XR37-T is usually 5 days.
3.What payment methods are accepted for MAX6347XR37-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347XR37-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347XR37-T?
MAX6347XR37-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347XR37-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 MAX6347XR37-T?
For technical support, including MAX6347XR37-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347XR37-T requirements.
6.How does Aetrix verify that MAX6347XR37-T is sourced from the original manufacturer or authorized distributors?
All MAX6347XR37-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 MAX6347XR37-T meets industry standards.
7.What is the process for return or replacement of MAX6347XR37-T?
All MAX6347XR37-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347XR37-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 MAX6347XR37-T part is unused and in its original packaging.
Return procedure for MAX6347XR37-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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