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Analog Devices Inc./Maxim Integrated MAX6310UK49D3-T
- Part No.:
- MAX6310UK49D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6310UK49D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
MAX6310UK49D3-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC and an external undervoltage input (RST IN) while providing push/pull active-low RESET output. It features factory-set 4.9V reset threshold (±2.5% over temperature), 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET assertion down to VCC = 1V. It is used in multivoltage embedded systems requiring reliable power-on and brownout reset.
For engineers reviewing the MAX6310UK49D3-T datasheet, MAX6310UK49D3-T pinout, MAX6310UK49D3-T application, or MAX6310UK49D3-T equivalent, key selection criteria include its dual-supply monitoring capability (VCC + RST IN), immunity to fast transients, manual-reset support, and compatibility with 3.3V/5V mixed-rail systems.
Technical Context
The MAX6310UK49D3-T implements a precision internal voltage divider to monitor VCC against a factory-trimmed 4.9V threshold, with ±2.5% tolerance over –40°C to +85°C. Its RST IN pin accepts an externally resistor-divided voltage for independent undervoltage monitoring of a second rail (e.g., 3.3V), referenced to a 1.23V internal comparator threshold.
It integrates a manual-reset input (MR) with 63.5kΩ internal pull-up and glitch rejection (<0.1µs), and asserts RESET for ≥140ms after all monitored supplies stabilize. The push/pull output drives high/low without external components and remains valid down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.900V nominal, ±2.5% over –40°C to +85°C - ensures reliable reset assertion during 5V rail brownout |
| Reset Timeout Period | 140ms minimum - guarantees µP initialization completes before release |
| Supply Current | 8µA typical at VCC = 5.5V - enables use in battery-powered portable equipment |
| RST IN Threshold | 1.23V ±0.03V - sets precise undervoltage trip point for secondary rail via external resistor divider |
| RESET Output Type | Active-low push/pull - sinks 3.2mA and sources 0.8×VCC, eliminating need for external pull-up |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| MR Input Logic | TTL/CMOS-compatible with internal 63.5kΩ pull-up - supports momentary switch or logic-driven reset initiation |
Pinout & Package
MAX6310UK49D3-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert system reset; holds valid logic level down to VCC = 1V; no external pull-up required |
| 2 - GND | System ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply (e.g., 3.3V) via external resistor divider; trips when input falls below 1.23V |
| 4 - MR | Manual-reset input | Pull low to force reset; internal 63.5kΩ pull-up allows direct switch connection; 1.5µs min pulse width |
| 5 - VCC | Main supply input and primary monitor | Powered from 5V rail; internally divided to compare against 4.9V threshold; VCC range: (VTH + 2.5%) to +5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail monitoring | Simultaneously supervises main VCC (4.9V) and secondary rail via RST IN - eliminates need for two discrete supervisors |
| Transient immunity | Immune to VCC glitches <140µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| No external components | Factory-programmed threshold and timeout; push/pull RESET output requires zero external passives |
| Guaranteed operation to 1V | RESET remains valid down to VCC = 1V - ensures deterministic behavior during deep brownout recovery |
| Industrial temperature range | Specified from –40°C to +85°C with production-tested performance - suitable for uncontrolled ambient deployments |
Applications
| Industrial PLC I/O Module | Medical Portable Monitor |
|---|---|
|
Use Scenario: Monitors both 5V logic supply and isolated 3.3V sensor interface rail in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-low RESET to ARM Cortex-M7 MCU upon any rail dropout. Use Value: Prevents firmware corruption during field-induced 5V dips or 3.3V LDO failure; 140ms timeout ensures full peripheral initialization. |
Use Scenario: Ensures safe boot sequence in battery-powered ECG device with separate analog front-end (3.3V) and digital core (5V) rails. IC Role / Device Role / Timing Role: Primary reset generator coordinating power-up sequencing between ADC subsystem and microcontroller. Use Value: 8µA quiescent current extends battery life; RST IN monitoring detects analog rail collapse before digital lockup occurs. |
| Automotive Infotainment Head Unit | Network Edge Gateway |
|
Use Scenario: Supervises 5V main processor supply and 3.3V CAN transceiver rail in a thermally stressed dashboard environment. IC Role / Device Role / Timing Role: Industrial-grade reset IC providing MR-initiated recovery and brownout protection across dual domains. Use Value: –40°C to +85°C operation ensures reliability under hood-adjacent mounting; transient immunity prevents CAN bus resets during load dump. |
Use Scenario: Manages power integrity for dual-core SoC and PoE-powered Ethernet PHY in compact industrial gateway. IC Role / Device Role / Timing Role: Centralized reset arbiter detecting faults on both primary DC-DC output and auxiliary 3.3V management rail. Use Value: Push/pull RESET drives SoC's bidirectional reset pin directly; no layout overhead for pull-up resistors saves board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6310EUK49D3-T | Extended temperature grade (–40°C to +85°C vs. 0°C to +70°C); identical electrical specs and pinout | Required for automotive, outdoor, or industrial enclosures where ambient exceeds 70°C | Select when operating temperature exceeds 70°C; otherwise MAX6310UK49D3-T suffices for commercial environments |
| TPS3808G33DBVR | Fixed 3.3V VDD threshold only; no RST IN input; 200ms timeout; 1.6µA supply current | Limited to single-rail 3.3V systems; lacks secondary rail monitoring capability | Use only if monitoring one supply and ultra-low current is critical; not a functional substitute for dual-rail supervision |
Compared with MAX6310UK49D3-T, the MAX6310EUK49D3-T extends thermal range without design change, while TPS3808G33DBVR trades dual-input flexibility for lower quiescent current and single-rail simplicity - neither offers drop-in replacement capability.
Availability
MAX6310UK49D3-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive infotainment systems, and network edge gateways requiring stable component supply and long-term manufacturability.
Supply support for MAX6310UK49D3-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 demanding industrial, automotive, and computing applications.
The MAX6305–MAX6313 family delivers programmable, multi-input supervisory circuits targeting systems with multiple voltage rails - engineered for robustness in brownout, transient, and thermal stress conditions.
FAQ
What is the factory-set reset threshold voltage for MAX6310UK49D3-T?
The MAX6310UK49D3-T has a factory-set VCC reset threshold of 4.900V nominal, with ±2.5% tolerance over the full –40°C to +85°C temperature range. This value is laser-trimmed during production and corresponds to the "49" in the part number per Table 1 of the datasheet. The threshold is implemented via an internal resistor divider and does not require external calibration.
Does MAX6310UK49D3-T support manual reset functionality?
Yes, MAX6310UK49D3-T includes a dedicated MR (manual reset) input on pin 4. Pulling MR low forces an immediate reset assertion, which persists for the full 140ms timeout period after MR returns high. The pin features an internal 63.5kΩ pull-up resistor, enabling direct connection to a normally open momentary switch without external components.
Can MAX6310UK49D3-T monitor a 3.3V supply in addition to its 5V VCC input?
Yes, MAX6310UK49D3-T monitors a secondary supply via its RST IN pin (pin 3). By connecting a resistor divider from the 3.3V rail to RST IN and GND, the device triggers reset when that rail falls below a calculated threshold (e.g., 3.0V) based on the internal 1.23V comparator reference. This enables true dual-rail supervision in mixed-voltage systems.
What is the minimum VCC voltage at which MAX6310UK49D3-T guarantees valid RESET output?
MAX6310UK49D3-T guarantees valid RESET output down to VCC = 1.0V. Below this, the push/pull driver's sourcing/sinking capability degrades significantly. For applications requiring reset validity down to 0V, a 100kΩ pull-down resistor from RESET to GND is recommended - a design detail confirmed in the "Ensuring a Valid RESET Output Down to VCC = 0V" section of the datasheet.
Is MAX6310UK49D3-T pin-compatible with other members of the MAX6305–MAX6313 family?
Yes, MAX6310UK49D3-T shares the identical 5-pin SOT23 package and pinout with all MAX6305–MAX6313 variants. Pin 1 is RESET, pin 2 is GND, pin 3 is RST IN, pin 4 is MR, and pin 5 is VCC - consistent across the family. However, functional differences exist (e.g., presence of OVRST IN or open-drain vs. push/pull output), so electrical compatibility must be verified per application requirements.
MAX6310UK49D3-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:
- 4.9V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6310UK49D3-T FAQ
1.How can I place an order for MAX6310UK49D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6310UK49D3-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 MAX6310UK49D3-T reliable?
The price and inventory of MAX6310UK49D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6310UK49D3-T is usually 5 days.
3.What payment methods are accepted for MAX6310UK49D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6310UK49D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6310UK49D3-T?
MAX6310UK49D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6310UK49D3-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 MAX6310UK49D3-T?
For technical support, including MAX6310UK49D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6310UK49D3-T requirements.
6.How does Aetrix verify that MAX6310UK49D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6310UK49D3-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 MAX6310UK49D3-T meets industry standards.
7.What is the process for return or replacement of MAX6310UK49D3-T?
All MAX6310UK49D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6310UK49D3-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 MAX6310UK49D3-T part is unused and in its original packaging.
Return procedure for MAX6310UK49D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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