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Analog Devices Inc./Maxim Integrated MAX6310UK40D2+
- Part No.:
- MAX6310UK40D2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6310UK40D2+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,053
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Product details
Overview
MAX6310UK40D2+ from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 4.0V threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It features 20ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems for reliable power-on and brownout reset generation.
For engineers reviewing the MAX6310UK40D2+ datasheet, MAX6310UK40D2+ pinout, MAX6310UK40D2+ application, or MAX6310UK40D2+ equivalent, key selection considerations include its triple-monitoring capability (VCC + RST IN + OVRST IN), factory-trimmed 4.0V VCC threshold with ±2.5% tolerance over -40°C to +85°C, 20ms reset timeout, push/pull RESET output structure, and immunity to fast VCC transients.
Technical Context
The MAX6310UK40D2+ implements a triple-input supervision architecture: internal factory-trimmed voltage divider for VCC monitoring at 4.0V nominal, external resistor-divider–based comparator for RST IN (undervoltage), and another for OVRST IN (overvoltage). All three inputs feed into a shared reset generator with a fixed 20ms timeout period (D2 variant).
Its push/pull RESET output drives low actively and pulls high via internal sourcing (VOH ≥ 0.8 × VCC at ISOURCE = 500µA), eliminating need for external pull-up. The device operates across VCC = (VTH + 2.5%) to +5.5V - i.e., 4.1V to 5.5V - and guarantees valid reset assertion down to VCC = 1V, with immunity to transients ≤ 20µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.000V nominal, ±2.5% over -40°C to +85°C - sets precise brownout detection point for main system rail |
| Reset Timeout Period | 20ms minimum - ensures µP reset pulse meets minimum duration requirements for reliable initialization |
| Supply Current | 8µA typical at VCC = 5.5V - enables use in battery-powered portable equipment with minimal quiescent drain |
| RESET Output Type | Active-low push/pull - sinks up to 1.2mA and sources up to 500µA, eliminating external pull-up resistor |
| Operating VCC Range | 4.1V to 5.5V - defined by VTH + 2.5% lower bound and absolute max rating, ensuring stable operation only above threshold |
| RST IN / OVRST IN Threshold | 1.23V reference (±0.03V) - allows precise external resistor-divider programming of auxiliary supply monitoring points |
| Transient Immunity | Rejects VCC glitches ≤ 20µs when overdrive is ≥100mV - prevents false resets during switching noise or load transients |
Pinout & Package
MAX6310UK40D2+ is housed in a lead-free 5-pin SOT23 package (package code U5+1, outline 21-0057), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is marked with a dot; pin numbering follows standard SOT23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives µP reset pin directly; sinks 1.2mA min, sources 500µA min - no external pull-up required |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance connection |
| 3 - OVRST IN | Adjustable overvoltage reset input | Compares external voltage (via resistor divider) to 1.23V ref; asserts reset if VIN exceeds programmed threshold |
| 4 - RST IN | Adjustable undervoltage reset input | Compares external voltage (via resistor divider) to 1.23V ref; asserts reset if VIN falls below programmed threshold |
| 5 - VCC | Main supply input and monitored rail | Powered from 4.1–5.5V system rail; internally divided to monitor 4.0V threshold; also powers all circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring inputs | VCC (4.0V), RST IN (programmable undervoltage), OVRST IN (programmable overvoltage) - supports complex multirail supervision without external logic |
| Factory-trimmed precision threshold | 4.000V ±2.5% over full temperature range - eliminates need for calibration or trimming resistors on VCC rail |
| No external components required | Self-contained reset generation with internal reference, timer, and push/pull driver - reduces BOM count and PCB area |
| Guaranteed RESET validity to VCC = 1V | Output remains functional even during deep brownout - ensures deterministic reset behavior as supply collapses |
| Immunity to short VCC transients | Rejects glitches ≤20µs at 100mV overdrive - prevents spurious resets in noisy or high-dV/dt environments |
Applications
| Industrial PLC Power Sequencing | Medical Infusion Pump Supervision |
|---|---|
|
Use Scenario: Monitors 5V main rail, 3.3V logic rail (via RST IN), and 24V pump driver rail (via OVRST IN) during startup and fault conditions. IC Role / Device Role / Timing Role: Triple-input supervisor generating synchronized active-low reset pulse with 20ms hold time to initialize microcontroller and safety-critical peripherals. Use Value: Prevents partial initialization by ensuring all rails are stable before release; overvoltage detection on 24V rail adds hardware-level pump motor protection. |
Use Scenario: Ensures safe power-up and brownout recovery in battery-backed infusion controller with isolated 5V, 3.3V, and analog sensor supplies. IC Role / Device Role / Timing Role: Primary reset generator asserting RESET until VCC ≥4.0V, RST IN ≥ programmed threshold, and OVRST IN ≤ programmed threshold - all verified before timeout expiration. Use Value: Eliminates risk of erratic motor control or dosage miscalculation during supply instability; 8µA quiescent current extends battery life between charges. |
| Automotive Body Control Module | Telecom Remote Radio Unit |
|
Use Scenario: Supervises 5V microcontroller supply (VCC), 3.3V CAN transceiver rail (RST IN), and 12V power amplifier rail (OVRST IN) in harsh automotive environment. IC Role / Device Role / Timing Role: Fault-tolerant reset source with transient immunity, operating across -40°C to +85°C and rejecting load-dump–induced spikes on 12V line. Use Value: Meets AEC-Q100 stress requirements via guaranteed performance over temperature; OVRST IN detects 12V overvoltage before damage occurs to downstream FETs. |
Use Scenario: Provides fail-safe reset for FPGA-based baseband processor in outdoor RRUs powered from -48V DC converted to 5V/3.3V/1.8V rails. IC Role / Device Role / Timing Role: Monitors primary 5V rail (VCC = 4.0V threshold), secondary 3.3V rail (RST IN), and backup 5V hold-up supply (OVRST IN) to prevent configuration corruption. Use Value: Push/pull RESET drives FPGA PROG_B pin directly; 20ms timeout satisfies Xilinx Spartan-7 minimum reset pulse width; 8µA current minimizes standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-input supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6310UK40D3+ | Same VCC threshold (4.0V) and pinout, but 140ms minimum reset timeout vs. 20ms | Suitable for systems requiring longer reset hold time (e.g., slow-starting LDOs or large-capacitance rails) | Select MAX6310UK40D3+ only if 140ms timeout is explicitly required; otherwise MAX6310UK40D2+ provides optimal timing for standard µP initialization. |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V threshold, open-drain output, 20ms timeout, 1.8µA IQ - lacks RST IN/OVRST IN capability | Applicable only where only one rail requires supervision; requires external pull-up and cannot monitor auxiliary supplies | Choose TPS3808G33DBVR only for cost-sensitive single-rail designs; MAX6310UK40D2+ is mandatory when dual auxiliary monitoring (RST IN + OVRST IN) is needed. |
Compared with MAX6310UK40D3+, the MAX6310UK40D2+ delivers tighter timing control for fast-boot systems; compared with TPS3808G33DBVR, it provides hardware-enforced multirail coordination without external components or logic - critical for safety- or reliability-critical applications.
Availability
MAX6310UK40D2+ is available at Aetrix Electronics and suitable for industrial PLC power sequencing, medical infusion pump supervision, automotive body control modules, telecom remote radio units, and multivoltage embedded systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6310UK40D2+ 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 demanding industrial, medical, and communications applications.
The MAX6305–MAX6313 family was engineered specifically for multivoltage system supervision - enabling simultaneous monitoring of primary, auxiliary, and overvoltage rails in compact SOT23 packages with zero external components.
FAQ
What is the exact factory-programmed VCC reset threshold for MAX6310UK40D2+?
The MAX6310UK40D2+ has a factory-trimmed VCC reset threshold of 4.000V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is permanently laser-trimmed during manufacturing and corresponds to the "40" in the part number per Table 1 of the datasheet.
Does MAX6310UK40D2+ require external pull-up resistors on the RESET pin?
No, MAX6310UK40D2+ does not require an external pull-up resistor. Its RESET pin is a push/pull active-low output capable of sourcing up to 500µA and sinking up to 1.2mA. This internal drive strength eliminates the need for external components while ensuring robust interfacing with µP reset inputs.
Can MAX6310UK40D2+ monitor both undervoltage and overvoltage on the same external rail?
Yes, MAX6310UK40D2+ can monitor both conditions on a single external rail using separate resistor dividers: RST IN for undervoltage detection (asserts reset when input falls below programmed threshold) and OVRST IN for overvoltage detection (asserts reset when input exceeds programmed threshold). Both compare against the same 1.23V internal reference.
What is the minimum VCC voltage at which MAX6310UK40D2+ guarantees valid RESET output?
MAX6310UK40D2+ guarantees valid RESET output down to VCC = 1.0V. Below this level, output drive capability degrades significantly. This specification ensures deterministic reset behavior during deep brownout events, allowing safe system shutdown before logic corruption occurs.
Is MAX6310UK40D2+ compatible with 3.3V microcontrollers?
Yes, MAX6310UK40D2+ is compatible with 3.3V microcontrollers. Its RESET output is active-low and push/pull, with VOH ≥ 0.8 × VCC (minimum 4.1V when VCC = 5.125V) and VOL ≤ 0.3V. When interfacing to 3.3V µPs, ensure VCC is within 4.1–5.5V range and verify RESET logic levels meet the µP's input thresholds - typically satisfied without level-shifting.
MAX6310UK40D2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6310UK40D2+ FAQ
1.How can I place an order for MAX6310UK40D2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6310UK40D2+ 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 MAX6310UK40D2+ reliable?
The price and inventory of MAX6310UK40D2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6310UK40D2+ is usually 5 days.
3.What payment methods are accepted for MAX6310UK40D2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6310UK40D2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6310UK40D2+?
MAX6310UK40D2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6310UK40D2+ 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 MAX6310UK40D2+?
For technical support, including MAX6310UK40D2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6310UK40D2+ requirements.
6.How does Aetrix verify that MAX6310UK40D2+ is sourced from the original manufacturer or authorized distributors?
All MAX6310UK40D2+ 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 MAX6310UK40D2+ meets industry standards.
7.What is the process for return or replacement of MAX6310UK40D2+?
All MAX6310UK40D2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6310UK40D2+, 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 MAX6310UK40D2+ part is unused and in its original packaging.
Return procedure for MAX6310UK40D2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6310UK40D2+ Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
Diodes Incorporated
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