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Analog Devices Inc./Maxim Integrated MAX6348XR46+T
- Part No.:
- MAX6348XR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6348XR46+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6348XR46+T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.63V power supplies and assert reset during brownout, power-up, and power-down events. It guarantees correct operation down to 1V VCC, delivers ≥100ms reset timeout after VCC recovery, consumes ≤1µA supply current at 3V, and features factory-trimmed 4.63V reset threshold with ±1.5% room-temperature accuracy. It is used in portable battery-powered systems requiring ultra-low-power voltage monitoring.
For engineers reviewing the MAX6348XR46+T datasheet, MAX6348XR46+T pinout, MAX6348XR46+T application, or MAX6348XR46+T equivalent, this page provides verified technical context, pin-level design meaning, real-world application mapping, and validated alternative options for reset supervisor selection in space-constrained, low-power embedded systems.
Technical Context
The MAX6348XR46+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 open-drain RESET output supports bidirectional µP reset interfaces (e.g., Motorola 68HC11) via external pull-up and tolerates VCC transients up to 100µs at 200mV overdrive.
It operates from 1.2V to 5.5V VCC, asserts reset when VCC falls below 4.63V (±2.5% over temperature), and maintains reset for ≥100ms after VCC rises above threshold. No external components are required, and it ignores fast VCC glitches due to built-in transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (±1.5% at +25°C; ±2.5% over -40°C to +85°C) - ensures reliable detection of 4.63V supply collapse without false triggers. |
| Supply Current | ≤1.0µA at 3V - enables multi-year battery life in portable equipment with no quiescent power penalty. |
| Reset Timeout | 100ms to 280ms (min/max) - guarantees sufficient hold time for µP initialization after power stabilization. |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and direct interface to bidirectional µP reset pins. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with wide-input systems. |
| Reset Hysteresis | 9.5mV - prevents oscillation near threshold during slow VCC ramping or noise. |
| Leakage Current | 0.1µA on RESET pin - minimizes pull-up resistor power loss in always-on monitoring circuits. |
Pinout & Package
MAX6348XR46+T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to logic rail; sinks ≥1.6mA when asserted. |
| 3 | VCC | Power supply input; monitors voltage level; functional down to 1.2V; absolute max 6V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | ≤1µA max at 3V - eliminates need for power gating in always-on supervision paths. |
| Factory-trimmed reset threshold | 4.63V with ±1.5% initial accuracy - removes calibration overhead and reduces BOM count. |
| Open-drain output architecture | Supports bidirectional reset assertion with µPs like 68HC11 - enables shared reset bus without level-shifting. |
| Transient immunity | Rejects VCC glitches <100µs at 200mV overdrive - prevents spurious resets in noisy power environments. |
| Wide VCC operating range | 1.2V to 5.5V - ensures supervision remains active during deep brownout and across mixed-voltage systems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor operating from a 4.5V Li-ion cell with tight power budget. IC Role / Device Role / Timing Role: Supervises main 4.63V regulated rail and asserts reset if voltage drops below safe operating level during discharge or load surge. Use Value: Ensures deterministic µC restart before data corruption occurs, leveraging 1µA quiescent current to extend battery life by >30% versus higher-ICC supervisors. |
Use Scenario: DIN-rail mounted I/O module powered from 24VDC converted to 5V/4.63V rails in harsh factory environments. IC Role / Device Role / Timing Role: Monitors the 4.63V logic supply feeding FPGA configuration and communication ICs; holds reset during line transients. Use Value: Prevents partial configuration or UART lockup by guaranteeing ≥100ms reset pulse after voltage recovery, meeting IEC 61000-4-4 immunity requirements. |
| Smart Meter Communication Units | Automotive Body Control Modules |
|
Use Scenario: NB-IoT-enabled electricity meter with isolated RS485 and RF transceiver powered from 4.63V LDO. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for the communication SoC; open-drain output interfaces directly to SoC's bidirectional reset pin. Use Value: Eliminates external pull-up dependency in isolated domain and ensures clean boot sequence even under 100ms AC dropout conditions. |
Use Scenario: Low-power BCM sub-module monitoring 4.63V supply derived from vehicle battery via buck converter. IC Role / Device Role / Timing Role: Detects undervoltage during cold-crank (battery dip to ~6V) and asserts reset to prevent EEPROM write corruption. Use Value: Factory-trimmed 4.63V threshold matches typical automotive LDO setpoint, avoiding custom resistor networks and improving production yield. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6348UR46+T | Same electrical specs and reset threshold, but in SOT23-3 package (larger footprint, 3.0mm × 1.4mm vs SC70's 2.0mm × 2.1mm). | Preferred where board assembly uses standard SOT23 pick-and-place tooling or thermal dissipation >320mW is needed. | Select MAX6348UR46+T when SC70 placement capability is unavailable or higher power handling is required. |
| TPS3808G33DBVR | 3.3V fixed threshold, push-pull output, 1.6µA ICC, same -40°C to +85°C range; not open-drain or 4.63V-compatible. | Suitable only where system uses 3.3V supply and does not require bidirectional reset or 4.63V trip point. | Choose TPS3808G33DBVR only if redesigning for 3.3V rail and push-pull interface; not drop-in for MAX6348XR46+T. |
Compared with MAX6348XR46+T, the MAX6348UR46+T offers identical functionality in a larger, more widely supported package, while the TPS3808G33DBVR serves a different voltage tier and interface requirement-neither is pin-compatible, and both require schematic and layout changes for substitution.
Availability
MAX6348XR46+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6348XR46+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.
The MAX63xx family targets cost-sensitive, space-constrained embedded systems needing dependable power-supply monitoring and reset generation without external components.
FAQ
What is the exact reset threshold voltage of the MAX6348XR46+T?
The MAX6348XR46+T has a factory-trimmed nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "R46" suffix variant of the MAX6348 family.
Does the MAX6348XR46+T support operation below 2.5V VCC?
Yes, the MAX6348XR46+T operates reliably down to 1.2V VCC across its full temperature range and remains functional (with guaranteed reset state) down to 1V. This enables use in deep-brownout scenarios and with low-voltage energy-harvesting sources, as specified in the Absolute Maximum Ratings and Electrical Characteristics sections.
Is the RESET output of the MAX6348XR46+T push-pull or open-drain?
The MAX6348XR46+T features an open-drain active-low RESET output, as explicitly stated in the General Description and Pin Description sections. This allows direct interfacing with bidirectional µP reset pins (e.g., Motorola 68HC11) using a single external pull-up resistor, distinguishing it from push-pull variants like MAX6347.
What package type and dimensions does the MAX6348XR46+T use?
The MAX6348XR46+T is supplied in a 3-pin SC70-3 package (package code X3-2), with outline dimensions of 2.0mm × 2.1mm × 0.95mm and land pattern 90-0208. This compact footprint is documented in the Package Information section and confirmed by the ordering information table listing "XR" as the SC70 variant.
How does the MAX6348XR46+T handle short VCC transients?
The MAX6348XR46+T rejects negative-going VCC transients up to 100µs in duration when the overdrive (VTH − VCC) is 200mV, as shown in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive." This built-in immunity prevents false resets during switching noise or load-dump events.
MAX6348XR46+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.6V
- 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
MAX6348XR46+T FAQ
1.How can I place an order for MAX6348XR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348XR46+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 MAX6348XR46+T reliable?
The price and inventory of MAX6348XR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348XR46+T is usually 5 days.
3.What payment methods are accepted for MAX6348XR46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348XR46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348XR46+T?
MAX6348XR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348XR46+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 MAX6348XR46+T?
For technical support, including MAX6348XR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348XR46+T requirements.
6.How does Aetrix verify that MAX6348XR46+T is sourced from the original manufacturer or authorized distributors?
All MAX6348XR46+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 MAX6348XR46+T meets industry standards.
7.What is the process for return or replacement of MAX6348XR46+T?
All MAX6348XR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348XR46+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 MAX6348XR46+T part is unused and in its original packaging.
Return procedure for MAX6348XR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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