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Analog Devices Inc./Maxim Integrated MAX6348XR33+
- Part No.:
- MAX6348XR33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6348XR33+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:898
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Product details
Overview
MAX6348XR33+ from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 3.3V power supplies and assert a reset signal during brownout, power-up, or power-down events. It features a factory-trimmed 3.30V reset threshold (±1.5% at +25°C), 100ms minimum reset timeout, ultra-low 1µA max supply current, and operates from 1.2V to 5.5V VCC over –40°C to +85°C. It is used in portable battery-powered systems requiring reliable, low-power reset assertion.
For engineers reviewing the MAX6348XR33+ datasheet, MAX6348XR33+ pinout, MAX6348XR33+ application, or MAX6348XR33+ equivalent, key selection criteria include its open-drain RESET output for bidirectional µP interface compatibility, 3.3V-specific threshold accuracy, SC70-3 package footprint, and immunity to sub-100µs VCC transients at 3.3V nominal operation.
Technical Context
The MAX6348XR33+ implements a precision bandgap-based voltage comparator with hysteresis (9.5mV) to detect VCC drops below 3.30V, triggering an open-drain RESET output that remains asserted for ≥100ms after VCC recovers. Its internal reference is trimmed to ±1.5% at +25°C and ±2.5% over full temperature range, with 40ppm/°C tempco.
Designed for direct interface with µPs having bidirectional reset pins (e.g., Motorola 68HC11), it requires only a single external pull-up resistor. The device ignores fast negative-going VCC transients-up to ~100µs duration when VCC dips 100mV below threshold-ensuring glitch immunity without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V ±1.5% at +25°C; ensures precise 3.3V supply monitoring with guaranteed trip point for system-level brownout detection |
| Reset Timeout | 100ms minimum; guarantees sufficient hold time for µP initialization and peripheral stabilization after power recovery |
| Supply Current | 1.0µA max at 3.3V; enables multi-year battery life in always-on portable instrumentation and IoT edge nodes |
| Output Type | Open-drain RESET; allows wired-OR configuration and direct connection to bidirectional µP reset pins without level-shifting |
| VCC Range | 1.2V to 5.5V; supports operation down to near-dead-battery conditions while maintaining valid reset state |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended commercial environments without derating |
| Threshold Hysteresis | 9.5mV; prevents chatter during slow VCC ramp-up or noise-induced threshold crossings |
Pinout & Package
MAX6348XR33+ is housed in a 3-pin SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (+ suffix).
| 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-low open-drain output; requires external pull-up to VCC or another logic rail; sinks up to 1.6mA when asserted |
| 3 | VCC | Power supply input; monitors this rail for reset generation; accepts 1.2V–5.5V with full functionality |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in coin-cell–powered remote sensors and wearables |
| Factory-trimmed reset threshold | 3.30V ±1.5% eliminates need for external resistive divider or calibration in 3.3V systems |
| Open-drain output architecture | Supports shared reset bus and bidirectional µP interfaces (e.g., 68HC11) with single pull-up resistor |
| Transient immunity | Rejects VCC glitches ≤100µs at 100mV overdrive, removing need for external RC filtering on supply rail |
| No external components required | Reduces BOM count and PCB area by eliminating trim pots, comparators, or timing capacitors |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters operating from single Li-ion or coin cells. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M0+ MCU during brownout or cold start. Use Value: 1µA max ICC extends usable battery life beyond 3 years; 3.30V threshold matches LDO output of typical sensor front-end power chain. | Use Scenario: DIN-rail mounted digital input modules exposed to wide ambient temperature swings and EMI-rich factory floors. IC Role / Device Role / Timing Role: Power-on reset generator ensuring deterministic µC boot sequence after AC/DC converter startup. Use Value: –40°C to +85°C rating and 100ms timeout guarantee clean initialization under variable line-voltage conditions. |
| Smart Energy Meters | Wireless Sensor Nodes |
Use Scenario: ANSI C12.20–compliant electricity meters with dual-supply (3.3V logic, 5V RF) and tamper-detection circuitry. IC Role / Device Role / Timing Role: Primary reset supervisor for 3.3V microcontroller domain, independent of 5V RF subsystem. Use Value: Open-drain RESET allows safe sharing with tamper-detection interrupt line; 3.30V threshold avoids false triggers from 3.3V LDO ripple. | Use Scenario: LoRaWAN end-nodes powered by primary lithium thionyl chloride cells with 15-year design life. IC Role / Device Role / Timing Role: Brownout detector enabling graceful shutdown and nonvolatile state save before VCC collapse. Use Value: 1.2V minimum VCC operation permits reset assertion down to end-of-life battery voltage (~2.0V); no external components reduce leakage paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR33+T | Push-pull active-low RESET output; same 3.30V threshold and SC70-3 package; 1.6µA max ICC | Requires dedicated RESET net; not compatible with bidirectional or wired-OR reset buses | Select when system uses unidirectional reset signaling and board layout cannot accommodate pull-up resistor |
| TPS3808G33DBVR | Adjustable threshold via external resistor divider; 2.5µA max ICC; SOT23-5 package with manual reset input | Needs two external resistors and occupies larger footprint; supports manual reset assertion | Select when design requires field-programmable threshold or hardware-initiated reset capability |
Compared with MAX809TR33+T and TPS3808G33DBVR, the MAX6348XR33+ uniquely combines open-drain output, 1µA max supply current, and factory-trimmed 3.30V threshold in SC70-3-making it optimal for space-constrained, battery-sensitive designs needing shared reset topology.
Availability
MAX6348XR33+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and wireless sensor nodes requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6348XR33+ 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, connectivity, and security applications.
The MAX63xx family delivers ultra-low-power, precision voltage supervision for microprocessor-based systems-designed specifically for battery-operated, space-constrained, and industrial-grade embedded control applications.
FAQ
What is the exact reset threshold voltage of MAX6348XR33+ and how tightly is it specified?
The MAX6348XR33+ has a factory-trimmed nominal reset threshold of 3.30V, with tolerance of ±1.5% at +25°C and ±2.5% over the full –40°C to +85°C operating range. This specification is guaranteed per datasheet Electrical Characteristics table and applies directly to the MAX6348XR33+ variant, confirmed by Table 1 suffix "R33" and ordering information.
Does MAX6348XR33+ support operation at VCC below 2.5V, and what is its minimum functional supply voltage?
Yes, MAX6348XR33+ operates down to 1.2V VCC across the full temperature range, and remains fully functional-including valid reset assertion and release-with VCC as low as 1.2V. This is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables, enabling use in deeply discharged battery scenarios where other supervisors fail.
What is the output configuration of MAX6348XR33+, and why does it matter for system design?
MAX6348XR33+ features an active-low open-drain RESET output. This allows direct connection to bidirectional µP reset pins (e.g., Motorola 68HC11) using only one external pull-up resistor, supports wired-OR reset busing, and avoids contention with other reset sources-unlike push-pull alternatives such as MAX6326XR33+ or MAX809TR33+.
How long is the reset timeout period of MAX6348XR33+, and is it temperature-stable?
The MAX6348XR33+ guarantees a minimum reset timeout of 100ms after VCC rises above the reset threshold, with typical values ranging from 100ms to 280ms depending on temperature and unit variation. The datasheet specifies 100ms (min) across –40°C to +85°C, and Typical Operating Characteristics show <5% variation over temperature-ensuring robust µP initialization timing in all environments.
Is MAX6348XR33+ pin-compatible with legacy Maxim reset ICs like MAX809 or MAX810?
No, MAX6348XR33+ is not pin-compatible with MAX809/MAX810. While both use SC70-3 packages, MAX809/MAX810 have different pinouts (VCC–GND–RESET vs. VCC–RESET–GND). MAX6348XR33+ follows the MAX632x pin configuration: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. Always verify pin mapping using the official MAX6348XR33+ datasheet top view diagram before PCB layout.
MAX6348XR33+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6348XR33+ FAQ
1.How can I place an order for MAX6348XR33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348XR33+ 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 MAX6348XR33+ reliable?
The price and inventory of MAX6348XR33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348XR33+ is usually 5 days.
3.What payment methods are accepted for MAX6348XR33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348XR33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348XR33+?
MAX6348XR33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348XR33+ 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 MAX6348XR33+?
For technical support, including MAX6348XR33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348XR33+ requirements.
6.How does Aetrix verify that MAX6348XR33+ is sourced from the original manufacturer or authorized distributors?
All MAX6348XR33+ 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 MAX6348XR33+ meets industry standards.
7.What is the process for return or replacement of MAX6348XR33+?
All MAX6348XR33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348XR33+, 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 MAX6348XR33+ part is unused and in its original packaging.
Return procedure for MAX6348XR33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6348XR33+ Tags
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