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Analog Devices Inc./Maxim Integrated MAX6348XR34-T
- Part No.:
- MAX6348XR34-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6348XR34-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,104
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Product details
Overview
MAX6348XR34-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 3.4V power supplies and assert reset during brownout, power-up, and power-down events. It features a factory-trimmed 3.400V 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 operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-power reset assertion.
For engineers reviewing the MAX6348XR34-T datasheet, MAX6348XR34-T pinout, MAX6348XR34-T application, or MAX6348XR34-T equivalent, key selection criteria include open-drain output compatibility with bidirectional µP reset pins (e.g., Motorola 68HC11), transient immunity against negative-going VCC glitches, guaranteed reset state down to 1V, and SC70-3 package suitability for space-constrained designs.
Technical Context
The MAX6348XR34-T implements a precision bandgap-based voltage comparator with hysteresis (9.5mV) to detect VCC drops below its 3.400V threshold. Its internal timing circuit ensures a minimum 100ms reset pulse width after VCC recovers, independent of supply ramp rate.
As an open-drain device, it requires an external pull-up resistor and interfaces directly with µP reset pins that support bidirectional control-enabling either the supervisor or the processor to assert system reset. It ignores fast transients on VCC up to 100µs duration when overdriven by ≥100mV below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.400V ±1.5% at +25°C; ensures reliable detection of 3.4V supply brownout without false triggering |
| Reset Timeout | 100ms minimum after VCC rise; guarantees µP initialization completes before release |
| Supply Current | 1.0µA max at 3.2V; enables multi-year operation in coin-cell–powered devices |
| Output Type | Open-drain active-low RESET; supports wired-OR reset buses and bidirectional µP interfaces |
| VCC Operating Range | 1.2V to 5.5V over -40°C to +85°C; allows use across wide input voltage conditions including deep brownout |
| Reset Hysteresis | 9.5mV; prevents oscillation near threshold during slow VCC recovery |
| Transient Immunity | Rejects ≤100µs negative VCC glitches when |VTH − VCC| ≥ 100mV; improves noise robustness |
Pinout & Package
MAX6348XR34-T is housed in a 3-pin SC70-3 package (outline X3-2), footprint-compatible with SOT23-3 but with smaller 1.25mm × 0.85mm body and 0.65mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to VCC or another logic rail |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year battery life in always-on monitoring applications |
| Factory-trimmed VTH | 3.400V threshold set at wafer level with ±1.5% accuracy eliminates calibration overhead |
| Open-drain output | Supports shared reset bus architecture and direct interface with bidirectional µP reset pins |
| Guaranteed reset state | Valid reset assertion guaranteed down to VCC = 1.2V, ensuring reliability during deep brownout |
| Transient rejection | Immune to VCC glitches ≤100µs when underdriven by ≥100mV, reducing false resets in noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent RF transmission. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M0+ MCU during battery voltage sag below 3.4V. Use Value: 1µA quiescent current extends operational lifetime beyond 3 years; open-drain output interfaces cleanly with MCU's bidirectional reset pin without additional logic. |
Use Scenario: DIN-rail mounted analog input module exposed to 24VDC supply ripple and EFT bursts. IC Role / Device Role / Timing Role: Power-monitoring reset generator ensuring deterministic µC restart after 24V brownout or EFT-induced dropout. Use Value: 9.5mV hysteresis and 100µs transient immunity prevent spurious resets during switching noise; SC70 package fits high-density PCB layouts. |
| Smart Utility Meters | Automotive Body Control Units |
|
Use Scenario: AMI meter powered by supercapacitor backup during mains failure, requiring clean restart upon capacitor recharge. IC Role / Device Role / Timing Role: Voltage supervisor holding reset until VCC stabilizes above 3.4V for ≥100ms post-recovery. Use Value: Factory-trimmed 3.400V threshold matches Li-ion–supercap hybrid supply profile; -40°C to +85°C rating covers outdoor deployment. |
Use Scenario: Low-voltage subsystem (e.g., door module) powered from vehicle battery with cold-crank dips to 6V. IC Role / Device Role / Timing Role: Reset controller maintaining reset during cranking-induced 3.4V collapse and releasing only after stable recovery. Use Value: Guaranteed operation down to 1.2V VCC ensures reset remains asserted even during extreme undervoltage; SC70-3 footprint saves board area in tight enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328XR34-T | Same 3.4V threshold, identical SC70-3 package and open-drain output, but rated for 1.0V to 5.5V VCC range (vs. 1.2V min for MAX6348) | Supports deeper brownout detection down to 1.0V; suitable where sub-1.2V reset hold is required | Select MAX6328XR34-T if system must guarantee reset assertion below 1.2V VCC |
| TPS3808G33DBVR | 3.3V threshold (not 3.4V), push-pull output, 1.4µA typical ICC, same SOT23-3 package | Lacks open-drain flexibility; requires redesign for bidirectional reset bus or pull-up removal | Choose TPS3808G33DBVR only if 3.3V threshold suffices and push-pull drive is acceptable |
Compared with MAX6348XR34-T, MAX6328XR34-T offers marginally wider VCC validity but identical functionality, while TPS3808G33DBVR trades threshold precision and output topology for TI's production scalability-neither is pin-compatible, and both require layout or firmware review for integration.
Availability
MAX6348XR34-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart utility meters, and automotive body control units requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX6348XR34-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, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX63xx family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for battery-powered and space-constrained systems requiring deterministic reset behavior across wide temperature and voltage ranges.
FAQ
What is the exact reset threshold voltage of MAX6348XR34-T and how tightly is it specified?
The MAX6348XR34-T has a nominal reset threshold of 3.400V, factory-trimmed with ±1.5% tolerance 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 MAX6348XR34-T-not derived from family averages or adjacent suffixes.
Does MAX6348XR34-T support operation below 1.2V VCC, and what happens to reset output below that voltage?
No-MAX6348XR34-T is specified to operate down to 1.2V VCC. Below 1.2V, the device is not guaranteed to maintain correct reset state; however, all MAX63xx devices (including MAX6348XR34-T) are guaranteed to hold RESET asserted for VCC ≥ 1.0V. The datasheet explicitly states "guaranteed to be in the correct state for VCC down to 1V", meaning RESET remains valid low until VCC falls below 1.0V.
Can MAX6348XR34-T replace MAX809 or MAX810 in existing designs?
Yes-MAX6348XR34-T is pin-compatible with MAX809/MAX810 in SC70-3 and SOT23-3 packages and shares identical pinout (VCC, RESET, GND). However, MAX6348XR34-T uses open-drain output (like MAX809) versus MAX810's push-pull, and its 3.400V threshold differs from standard MAX809 variants (2.93V, 3.08V, etc.). Verify threshold match and pull-up presence before drop-in replacement.
What is the maximum allowable negative VCC transient duration that MAX6348XR34-T will ignore at its 3.4V threshold?
Per the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet, MAX6348XR34-T ignores negative VCC transients ≤100µs when the overdrive (VTH − VCC) is ≥100mV. At 3.4V threshold, this means transients dipping to ≤3.3V for ≤100µs will not trigger reset-critical for rejecting switching noise in DC/DC converter outputs.
Is MAX6348XR34-T available in lead-free packaging, and how is it ordered?
Yes-MAX6348XR34-T is available in lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T", resulting in MAX6348XR34+T. Both versions share identical electrical specifications, thermal performance, and SC70-3 package dimensions; only the RoHS compliance marking differs.
MAX6348XR34-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:
- 3.4V
- 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
MAX6348XR34-T FAQ
1.How can I place an order for MAX6348XR34-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348XR34-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 MAX6348XR34-T reliable?
The price and inventory of MAX6348XR34-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348XR34-T is usually 5 days.
3.What payment methods are accepted for MAX6348XR34-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348XR34-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348XR34-T?
MAX6348XR34-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348XR34-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 MAX6348XR34-T?
For technical support, including MAX6348XR34-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348XR34-T requirements.
6.How does Aetrix verify that MAX6348XR34-T is sourced from the original manufacturer or authorized distributors?
All MAX6348XR34-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 MAX6348XR34-T meets industry standards.
7.What is the process for return or replacement of MAX6348XR34-T?
All MAX6348XR34-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348XR34-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 MAX6348XR34-T part is unused and in its original packaging.
Return procedure for MAX6348XR34-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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