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Analog Devices Inc./Maxim Integrated MAX6313UK38D2-T
- Part No.:
- MAX6313UK38D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6313UK38D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
MAX6313UK38D2-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 3.8V threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting an active-high push/pull RESET signal when any monitored supply violates its threshold. It features 20ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6313UK38D2-T datasheet, MAX6313UK38D2-T pinout, MAX6313UK38D2-T application, or MAX6313UK38D2-T equivalent, key selection considerations include its triple-monitor architecture (VCC + RST IN + OVRST IN), active-high push/pull output, factory-programmed 3.8V VCC threshold with ±2.5% tolerance over –40°C to +85°C, 20ms reset timeout, and immunity to fast VCC transients up to 100V/µs.
Technical Context
The MAX6313UK38D2-T implements a triple-input supervision architecture: internal factory-trimmed resistor divider for precise 3.8V VCC monitoring, external resistor-divider–based RST IN for configurable undervoltage detection, and OVRST IN for overvoltage detection referenced to a 1.23V internal bandgap. All three comparators feed into a shared reset generator with a fixed 20ms (min) timeout period.
Its active-high push/pull RESET output sources ≥0.8×VCC at 150µA (VCC > 1.8V) and sinks ≥500µA at ≤0.3V, enabling direct interface with µP reset inputs without external pull-up. The device operates across VCC = (3.8V × 1.025) to 5.5V and remains functional down to VCC = 1.0V, with guaranteed reset assertion below threshold and glitch rejection on all inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.8V nominal, ±2.5% over –40°C to +85°C - sets precise brownout detection point for primary 3.3V/5V rail |
| Reset Timeout Period | 20ms minimum - ensures µP reset pulse meets minimum duration requirements for reliable initialization |
| Supply Current | 8µA typical at +25°C - enables use in battery-powered portable equipment with multi-year runtime |
| RESET Output Type | Active-high push/pull - eliminates need for external pull-up resistor and supports direct µP reset pin drive |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference - allows flexible external resistor-divider programming of secondary supply thresholds |
| VCC Operating Range | 3.895V to 5.5V - ensures stable operation only when main supply exceeds 3.8V threshold by margin |
| Transient Immunity | Immune to VCC transients ≤100V/µs - prevents false resets during switching noise or load dump events |
Pinout & Package
MAX6313UK38D2-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts in space-constrained portable and embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push/pull reset output | Drives µP reset pin directly; sinks ≥500µA at ≤0.3V, sources ≥0.8×VCC at 150µA; no external pull-up required |
| 2 - GND | System ground reference | Return path for all internal comparators and output driver; must be low-impedance connection to system ground plane |
| 3 - OVRST IN | Adjustable overvoltage reset comparator input | Asserts reset when external voltage exceeds programmed threshold (via resistor divider to 1.23V reference) |
| 4 - RST IN | Adjustable undervoltage reset comparator input | Asserts reset when external voltage falls below programmed threshold (via resistor divider to 1.23V reference) |
| 5 - VCC | Main supply input and monitored rail | Supplies IC and feeds internal 3.8V threshold detector; must remain ≥3.895V for valid operation per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises primary VCC (3.8V), secondary undervoltage rail (RST IN), and overvoltage rail (OVRST IN) - reduces BOM count vs. discrete supervisors |
| Factory-programmed precision threshold | 3.8V VCC reset point trimmed to ±2.5% over full temperature range - eliminates calibration effort and external resistor networks |
| Glitch-immune comparators | All inputs reject transients < 0.1µs - prevents spurious resets from ESD, switching noise, or cable coupling |
| No external components required | Operates fully functional with only VCC, GND, and RESET load - simplifies layout and improves reliability in compact systems |
| Guaranteed RESET down to VCC = 1V | Output remains valid logic high until VCC drops to 1.0V - ensures deterministic reset behavior during deep brownout |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
|
Use Scenario: Monitoring 5V logic rail, 3.3V microcontroller core, and 12V analog sensor supply in a battery-backed field device. IC Role / Device Role / Timing Role: Triple-input supervisor asserting active-high RESET to ARM Cortex-M4 MCU upon any rail deviation, with 20ms timeout ensuring firmware boot integrity. Use Value: Eliminates need for three separate reset ICs; factory-trimmed 3.8V threshold precisely matches 3.3V rail tolerance, reducing design validation time. |
Use Scenario: Power sequencing and fault detection in handheld ECG units powered by Li-ion battery with dual DC-DC outputs (3.3V/5V). IC Role / Device Role / Timing Role: Supervises main 3.3V rail (VCC), backup 5V display supply (RST IN), and battery overvoltage condition (OVRST IN) to trigger safe shutdown. Use Value: Active-high push/pull output interfaces directly with low-power MCU reset pin without pull-up, saving board space and leakage current. |
| Automotive Body Control Units | Industrial Motor Drives |
|
Use Scenario: Monitoring 5V MCU supply, 12V CAN transceiver rail, and 24V actuator power in under-hood ECUs exposed to load dump transients. IC Role / Device Role / Timing Role: Detects VCC brownout, 12V undervoltage (RST IN), and 24V overvoltage (OVRST IN); asserts RESET to prevent erratic CAN messaging during supply faults. Use Value: Immunity to 100V/µs transients ensures no false resets during ISO 7637-2 pulse 5a events; SOT23 package withstands automotive thermal cycling. |
Use Scenario: Fault protection in servo drive controllers where 24V logic, 15V gate driver, and 48V bus supplies must be validated before PWM enable. IC Role / Device Role / Timing Role: Uses RST IN to monitor isolated 15V gate driver supply and OVRST IN to detect 48V bus overvoltage, triggering hardware reset before IGBT turn-on. Use Value: Factory-set 3.8V threshold aligns with 24V-to-3.3V LDO dropout margin; 8µA quiescent current minimizes standby power loss in always-on control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-input supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6313UK38D3-T | Same 3.8V VCC threshold and pinout, but 140ms min reset timeout vs. 20ms | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration or EEPROM write cycles) | Select D3 variant only if extended timeout is explicitly required; D2 provides faster recovery after brief brownouts |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V threshold, open-drain output, 20ms timeout, 1.4µA IQ | Lacks RST IN/OVRST IN capability; requires external circuitry for multi-rail monitoring | Use only for simple single-rail 3.3V systems where ultra-low IQ is critical and secondary rail supervision is handled elsewhere |
Compared with MAX6313UK38D2-T, the D3 variant trades faster reset release for longer fault hold time, while TPS3808G33DBVR reduces supply current by 82% but sacrifices triple-input flexibility and active-high drive - making MAX6313UK38D2-T optimal for compact multivoltage systems needing integrated supervision without layout overhead.
Availability
MAX6313UK38D2-T is available at Aetrix Electronics and suitable for industrial motor drives, medical portable monitors, automotive body control units, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6313UK38D2-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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6305–MAX6313 family was designed specifically for multivoltage embedded systems requiring simultaneous monitoring of primary, auxiliary, and safety-critical rails - delivering precision, low power, and transient immunity in minimal SOT23 footprint.
FAQ
What is the exact VCC reset threshold and tolerance for MAX6313UK38D2-T?
The MAX6313UK38D2-T has a factory-programmed VCC reset threshold of 3.8V nominal, with a guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. This means the actual trip point falls between 3.705V and 3.895V under worst-case conditions, as confirmed in the Electrical Characteristics table (VTH MIN/MAX columns for MAX6313E).
Does MAX6313UK38D2-T support manual reset functionality?
No, MAX6313UK38D2-T does not include a manual reset (MR) input. Per the Selector Table and Pin Description, MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6313UK38D2-T provides three supervision inputs - VCC, RST IN, and OVRST IN - but no dedicated MR pin; reset is asserted solely by voltage violations.
What are the absolute maximum ratings for VCC on MAX6313UK38D2-T?
The absolute maximum VCC rating for MAX6313UK38D2-T is +6V, with recommended operating range specified as (3.8V × 1.025) = 3.895V minimum to +5.5V maximum. Operation below 3.895V may result in undefined reset behavior, and exceeding +6V risks permanent damage per Absolute Maximum Ratings.
Can MAX6313UK38D2-T monitor a 12V supply directly?
No, MAX6313UK38D2-T cannot monitor 12V directly on any pin. Its VCC pin accepts max +5.5V; RST IN and OVRST IN reference a 1.23V internal threshold and require external resistor dividers to scale higher voltages. To supervise 12V, connect it to RST IN or OVRST IN via a precision divider (e.g., 1MΩ + 105kΩ) to produce ≤1.23V at threshold crossing.
What is the reset output drive strength of MAX6313UK38D2-T?
The MAX6313UK38D2-T features an active-high push/pull RESET output capable of sourcing ≥0.8×VCC at 150µA (for VCC > 1.8V) and sinking ≥500µA at ≤0.3V (for VCC > 1.0V). This eliminates external pull-up resistors and ensures robust interfacing with standard CMOS/TTL reset inputs across its operating range.
MAX6313UK38D2-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.8V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6313UK38D2-T FAQ
1.How can I place an order for MAX6313UK38D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6313UK38D2-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 MAX6313UK38D2-T reliable?
The price and inventory of MAX6313UK38D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6313UK38D2-T is usually 5 days.
3.What payment methods are accepted for MAX6313UK38D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6313UK38D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6313UK38D2-T?
MAX6313UK38D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6313UK38D2-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 MAX6313UK38D2-T?
For technical support, including MAX6313UK38D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6313UK38D2-T requirements.
6.How does Aetrix verify that MAX6313UK38D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6313UK38D2-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 MAX6313UK38D2-T meets industry standards.
7.What is the process for return or replacement of MAX6313UK38D2-T?
All MAX6313UK38D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6313UK38D2-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 MAX6313UK38D2-T part is unused and in its original packaging.
Return procedure for MAX6313UK38D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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