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Analog Devices Inc./Maxim Integrated MAX6347UR46+T
- Part No.:
- MAX6347UR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6347UR46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,911
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Product details
Overview
MAX6347UR46+T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC and asserts a reset signal when supply voltage falls below 4.63V, maintaining reset for ≥100ms after recovery; it operates from 1.2V to 5.5V, draws ≤1µA supply current, and is housed in a 3-pin SOT23 package for embedded power monitoring in portable and industrial systems.
For engineers reviewing the MAX6347UR46+T datasheet, MAX6347UR46+T pinout, MAX6347UR46+T application, or MAX6347UR46+T equivalent, this page delivers verified reset threshold accuracy (±2.5% over -40°C to +85°C), transient immunity data, push-pull output drive capability, and direct substitution guidance against industry-standard µP reset ICs.
Technical Context
The MAX6347UR46+T implements a precision bandgap-based reset comparator with factory-trimmed 4.63V threshold (±1.5% at +25°C, ±2.5% over full temperature range) and 40ppm/°C tempco. Its internal timing circuit guarantees minimum 100ms reset timeout after power-up or brownout recovery.
Designed for immunity to fast VCC transients, the device ignores negative-going glitches up to 200µs at 100mV overdrive and supports operation down to 1.2V VCC while maintaining correct reset state - critical for battery-backed and low-voltage microcontroller systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory-trimmed, ±2.5% over -40°C to +85°C) - ensures reliable reset assertion before µP functional failure at 5V rail |
| Reset Timeout | 100ms minimum - meets JEDEC JESD8-12B power-on reset duration requirements for stable µP initialization |
| Supply Current | ≤1.0µA at +25°C - enables multi-year battery life in coin-cell-powered IoT sensors and wearables |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 1.8V–5V logic families |
| Output Type | Active-high push-pull - drives reset line directly without external pull-up, simplifying BOM and PCB layout |
| Reset Hysteresis | 9.5mV - prevents chatter during slow VCC ramp-up or noise-induced threshold crossings |
| Transient Immunity | Rejects ≤200µs negative VCC glitches at 100mV overdrive - eliminates false resets in noisy power environments |
Pinout & Package
MAX6347UR46+T is packaged in a RoHS-compliant 3-pin SOT23-3 (U3-1) surface-mount package with 0.95mm pitch, footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected to system ground plane for accurate threshold sensing |
| 2 (RESET) | Active-high push-pull output | Drives high (≥0.8×VCC) when VCC ≥ 4.63V and stable; sinks 1.2mA when low - interfaces directly with µP reset input |
| 3 (VCC) | Supply input | Power source and monitored rail; accepts 1.2V–5.5V; internal circuitry remains functional down to 1.2V for brownout detection |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | ≤1.0µA max enables >10-year battery life in always-on monitoring nodes without compromising reset reliability |
| Precision 4.63V threshold | Factory-trimmed to ±1.5% at +25°C ensures deterministic reset point for 5V systems with tight supply tolerances |
| 100ms guaranteed timeout | Internally timed - no external capacitor required, eliminating drift, aging, and layout sensitivity |
| Push-pull RESET output | Eliminates need for external pull-up resistor, reducing component count and board space in space-constrained designs |
| VCC down to 1.2V operation | Maintains correct reset state during deep brownout - prevents premature µP release before stable power restoration |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in harsh factory environments with fluctuating 24VDC-derived 5V rails. IC Role / Device Role / Timing Role: Monitors 5V logic supply and asserts active-high reset to ARM Cortex-M7 MCU upon brownout or power interruption. Use Value: Prevents corrupted firmware execution during undervoltage by guaranteeing ≥100ms reset hold time after VCC recovers to 4.63V. |
Use Scenario: Remote environmental sensors powered by CR2032 coin cells, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output and triggers MCU reset if battery sags below 4.63V threshold during cold-start or aging. Use Value: Enables ultra-low-power sleep mode (1µA ICC) while preserving deterministic reset behavior across full temperature range (-40°C to +85°C). |
| Medical Point-of-Care Devices | Automotive Body Control Modules |
Use Scenario: Portable blood glucose meters requiring FDA-grade power integrity and fail-safe startup sequencing. IC Role / Device Role / Timing Role: Provides active-high reset to MSP430 microcontroller during battery insertion and power-rail stabilization. Use Value: Meets IEC 62304 Class B software safety requirements via guaranteed reset assertion during all VCC fault conditions. |
Use Scenario: Aftermarket lighting control units powered from vehicle 12V system through 5V buck converter with ripple and load-dump transients. IC Role / Device Role / Timing Role: Detects 5V rail collapse during cranking or alternator failure and holds reset until stable recovery above 4.63V. Use Value: Rejects ≤200µs negative transients per ISO 7637-2 Pulse 4, preventing spurious resets in electrically noisy automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 4.63V threshold, active-low open-drain output, 1.2µA ICC, same SOT23-3 package | Requires external pull-up resistor; incompatible with µPs needing active-high reset without level-shifting | Select only if system design already uses active-low reset architecture and can accommodate open-drain drive |
| TPS3808G33DBVR | 3.3V threshold, active-high push-pull, 2.5µA ICC, SOT23-6 package (different pinout) | Not a drop-in replacement: different threshold, larger package, and no 4.63V variant in same footprint | Consider only for new designs targeting 3.3V rails where higher ICC is acceptable and PCB layout allows 6-pin placement |
Compared with MAX809TRD2+T and TPS3808G33DBVR, the MAX6347UR46+T uniquely combines 4.63V precision threshold, active-high push-pull output, and 1µA supply current in a 3-pin SOT23 - enabling direct replacement of legacy 5V µP supervisors without layout changes or BOM additions.
Availability
MAX6347UR46+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical point-of-care devices, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6347UR46+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, medical, and communications applications, with emphasis on power efficiency and reliability.
The MAX63xx family was engineered specifically for microprocessor power-supply supervision in space-constrained, low-power embedded systems - delivering factory-trimmed thresholds, ultra-low ICC, and robust transient immunity in minimal 3-pin packages.
FAQ
What is the exact reset threshold voltage of MAX6347UR46+T and how tightly is it specified?
The MAX6347UR46+T has a factory-trimmed nominal reset threshold of 4.63V, guaranteed within ±1.5% at +25°C and ±2.5% over the full operating temperature range of -40°C to +85°C. This specification is confirmed in Table 1 of the official datasheet and applies directly to the MAX6347UR46+T variant, not inferred from other members of the MAX63xx family.
Does MAX6347UR46+T provide active-high or active-low reset output, and what is its drive capability?
The MAX6347UR46+T provides an active-high push-pull reset output. When asserted (low), it sinks up to 1.2mA at VCC ≥ 3.2V; when deasserted (high), it sources ≥0.8×VCC at 500µA load. This eliminates the need for an external pull-up resistor and ensures direct interface with µP reset inputs requiring active-high signaling.
What is the minimum VCC voltage at which MAX6347UR46+T remains functional and maintains correct reset state?
The MAX6347UR46+T is guaranteed to maintain correct reset state down to VCC = 1.2V over the full -40°C to +85°C temperature range. Below 1.2V, the device may not assert reset reliably; however, its internal circuitry remains operational to detect recovery once VCC rises above the 4.63V threshold.
How does MAX6347UR46+T handle fast power-supply transients, and what is its immunity limit?
The MAX6347UR46+T is designed to ignore fast negative-going VCC transients. Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive", it rejects glitches ≤200µs wide when the overdrive (VTH – VCC) is 100mV - a key feature validated in the MAX6326/MAX6347 datasheet and applicable to the MAX6347UR46+T.
Is MAX6347UR46+T pin-compatible with older Maxim reset ICs like MAX809 or MAX810?
No - MAX6347UR46+T is not pin-compatible with MAX809/MAX810. While both use SOT23-3 packages, MAX809/MAX810 have active-low outputs and different pin assignments (e.g., RESET on pin 3). The MAX6347UR46+T places RESET on pin 2 and GND on pin 1, matching the MAX6327/MAX6347 pinout, not the MAX80x series.
MAX6347UR46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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:
- SOT-23-3
MAX6347UR46+T FAQ
1.How can I place an order for MAX6347UR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347UR46+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 MAX6347UR46+T reliable?
The price and inventory of MAX6347UR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347UR46+T is usually 5 days.
3.What payment methods are accepted for MAX6347UR46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347UR46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347UR46+T?
MAX6347UR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347UR46+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 MAX6347UR46+T?
For technical support, including MAX6347UR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347UR46+T requirements.
6.How does Aetrix verify that MAX6347UR46+T is sourced from the original manufacturer or authorized distributors?
All MAX6347UR46+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 MAX6347UR46+T meets industry standards.
7.What is the process for return or replacement of MAX6347UR46+T?
All MAX6347UR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347UR46+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 MAX6347UR46+T part is unused and in its original packaging.
Return procedure for MAX6347UR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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