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Analog Devices Inc./Maxim Integrated MAX6310UK46D3+T
- Part No.:
- MAX6310UK46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6310UK46D3+T.pdf
- Description:
- IC PROGRAM 4.630V RESET SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6310UK46D3+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory circuit that monitors VCC (factory-set 4.6V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting an active-low push/pull RESET output when any monitored supply violates its threshold. It draws only 8µA supply current, guarantees RESET validity down to VCC = 1V, and features a factory-programmed 140ms minimum reset timeout period. It is used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6310UK46D3+T datasheet, MAX6310UK46D3+T pinout, MAX6310UK46D3+T application, or MAX6310UK46D3+T equivalent, key selection criteria include its dual-input monitoring capability (VCC + RST IN + OVRST IN), 4.6V ±2.5% factory-trimmed VCC threshold, 140ms min timeout, push/pull RESET drive, and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX6310UK46D3+T implements a triple-monitor architecture: internal factory-trimmed resistor divider for VCC supervision at 4.6V nominal, external resistor-divider–based comparator for RST IN (undervoltage), and another for OVRST IN (overvoltage), all referenced to a 1.23V internal bandgap. Its reset generator includes a precision timeout timer with ±20% tolerance over temperature.
It uses a push/pull (complementary) active-low RESET output capable of sinking 3.2mA at VCC > 4.25V and sourcing 800µA, eliminating need for external pull-up. Immunity to fast transients is achieved via internal filtering and hysteresis (2.5mV on RST IN/OVRST IN, 2×VTH on VCC), with guaranteed reset assertion even during VCC dips to 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.6V ±2.5% (–40°C to +85°C); factory-trimmed for precise 5V rail supervision without external components |
| Reset Timeout Period | 140ms minimum; ensures µP reset pulse meets typical boot initialization timing requirements |
| Supply Current | 8µA typical at +25°C; enables use in battery-powered portable equipment with multi-year standby life |
| RESET Output Type | Active-low push/pull; drives logic directly without external pull-up, supports TTL/CMOS loads |
| Operating Temperature | –40°C to +85°C; qualified for industrial and automotive-adjacent embedded control environments |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference; allows precise external resistor-divider programming of auxiliary supply thresholds |
| VCC Validity Range | RESET asserted valid down to VCC = 1V; prevents undefined microprocessor state during deep brownout |
Pinout & Package
MAX6310UK46D3+T is housed in a lead-free 5-pin SOT23 package (package code U5+1), footprint-compatible with industry-standard 5-lead SOT-23 layouts and suitable for high-density PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microprocessor reset pin directly; sinks 3.2mA or sources 800µA; 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 reference; asserts reset if input exceeds threshold |
| 4 - RST IN | Adjustable undervoltage reset input | Compares external voltage (via resistor divider) to 1.23V reference; asserts reset if input falls below threshold |
| 5 - VCC | Main supply input and monitored rail | Power source and primary monitored voltage; internal trimmed divider sets 4.6V reset point |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises main VCC (4.6V), auxiliary undervoltage (RST IN), and overvoltage (OVRST IN) rails with independent thresholds |
| Factory-programmed timing | 140ms minimum reset timeout eliminates need for external RC timing network and associated component drift |
| Transient-immune comparators | Internal hysteresis and filtering reject sub-microsecond glitches on VCC, RST IN, and OVRST IN-no external capacitors required |
| Low-power operation | 8µA supply current enables integration into always-on subsystems without compromising battery runtime |
| Robust reset assertion | Guaranteed RESET logic level validity down to VCC = 1V ensures deterministic µP behavior during severe brownout conditions |
Applications
| Industrial PLC I/O Modules | Medical Portable Diagnostic Devices |
|---|---|
Use Scenario: Power sequencing and fault detection in modular I/O backplanes with mixed 5V, 3.3V, and 24V rails. IC Role / Device Role / Timing Role: Supervises primary 5V logic rail (VCC), secondary 24V field power (OVRST IN), and isolated 3.3V communication bus (RST IN) to prevent firmware corruption during rail collapse. Use Value: Eliminates need for three discrete supervisors; 4.6V VCC threshold matches standard 5V regulator tolerance, while dual auxiliary inputs cover safety-critical over/under limits. |
Use Scenario: Battery-backed ECG monitor maintaining real-time sampling during AC adapter transitions and low-battery brownouts. IC Role / Device Role / Timing Role: Monitors main 3.3V system rail (RST IN via divider), backup coin-cell voltage (OVRST IN), and 5V USB charging input (VCC) to trigger controlled shutdown and data save. Use Value: 140ms timeout ensures sufficient time to flush memory before power loss; 8µA quiescent current extends coin-cell life beyond 5 years. |
| Automotive Body Control Units | Network Edge Routers |
Use Scenario: Cold-cranking resilience in BCMs where battery voltage dips to 6V while 5V LDO output sags below specification. IC Role / Device Role / Timing Role: Uses VCC pin to monitor regulated 5V supply (4.6V threshold), RST IN to track raw battery (via divider), and OVRST IN to detect alternator overvoltage spikes (>16V). Use Value: Triple-input architecture detects both under- and overvoltage faults simultaneously; push/pull RESET drives automotive-grade µP reset with no external components. |
Use Scenario: High-availability routing platforms with redundant 12V/5V/3.3V power domains and hot-swap capability. IC Role / Device Role / Timing Role: Supervises primary 5V core rail (VCC), 12V fan/power delivery (OVRST IN), and 3.3V management controller (RST IN) to initiate graceful failover on any rail failure. Use Value: Factory-trimmed 4.6V threshold avoids calibration overhead; guaranteed –40°C to +85°C operation supports extended temperature chassis mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6310EUK46D3+T | Extended temperature grade (–40°C to +85°C vs. 0°C to +70°C for MAX6310UK46D3+T); identical electrical specs and pinout | Required for industrial or automotive-ambient deployments; not suitable for commercial-only designs due to higher cost | Select MAX6310EUK46D3+T when operating ambient exceeds 70°C or full industrial temp range qualification is mandated. |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V fixed threshold, 200ms timeout, open-drain output; lacks RST IN/OVRST IN and push/pull drive | Suitable only for basic 3.3V rail monitoring; cannot replace triple-input functionality or eliminate pull-up resistor | Use only if design requires only VDD supervision at 3.3V and can accommodate external pull-up and reduced feature set. |
Compared with MAX6310EUK46D3+T, the MAX6310UK46D3+T trades extended temperature support for lower cost in commercial environments; compared with TPS3808G33DBVR, it delivers triple-input flexibility, factory-programmed 4.6V accuracy, and push/pull drive-enabling simpler, more robust system-level supervision.
Availability
MAX6310UK46D3+T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body controllers, and network edge routers requiring stable component supply across production lifecycles.
Supply support for MAX6310UK46D3+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6305–MAX6313 family was designed to replace discrete reset solutions in multivoltage embedded systems, delivering precision, low power, and triple-supply monitoring in a single 5-pin SOT23 package.
FAQ
What is the exact factory-programmed reset threshold voltage for MAX6310UK46D3+T?
The MAX6310UK46D3+T has a factory-trimmed VCC reset threshold of 4.6V nominal, with ±2.5% tolerance over the full –40°C to +85°C temperature range. This value is confirmed in the Electrical Characteristics table of the MAX6305–MAX6313 datasheet (Rev 6, page 2), where "UK46" explicitly denotes the 4.6V variant. The threshold is set by an internal laser-trimmed resistor divider and requires no external calibration.
Does MAX6310UK46D3+T support monitoring of auxiliary power supplies beyond VCC?
Yes, MAX6310UK46D3+T supports two additional monitored inputs: RST IN (undervoltage comparator) and OVRST IN (overvoltage comparator), each referenced to a precise 1.23V internal bandgap. These pins accept external resistor dividers to program custom thresholds-for example, monitoring a 12V rail for overvoltage or a 3.3V rail for undervoltage-while VCC independently supervises the 4.6V nominal supply.
What is the reset timeout period programmed into MAX6310UK46D3+T?
The "D3" suffix in MAX6310UK46D3+T specifies a factory-programmed minimum reset timeout period of 140ms. Per the Ordering Information section (page 9), D3 corresponds to "140ms min", and the Electrical Characteristics table (page 2) lists tRP = 140ms (min), 200ms (typ), 280ms (max) for D3 configuration. This timeout is generated internally and requires no external components.
Is MAX6310UK46D3+T compatible with systems requiring a push/pull RESET output?
Yes, MAX6310UK46D3+T features an active-low push/pull RESET output, capable of both sourcing (up to 800µA) and sinking (up to 3.2mA) current. Unlike open-drain variants, it does not require an external pull-up resistor. This is confirmed in the Pin Description (page 5) and Electrical Characteristics (page 2, VOH/VOL specs), distinguishing it from MAX6305–MAX6307 (open-drain) and MAX6311–MAX6313 (active-high push/pull).
What package type and RoHS status does MAX6310UK46D3+T use?
MAX6310UK46D3+T is supplied in a lead-free 5-pin SOT23 package (package code U5+1), per Maxim's Package Information (page 10). The "+T" suffix explicitly denotes RoHS-compliant, lead-free construction, verified in the Ordering Information section (page 9): "Specify lead-free by replacing '-T' with '+T' when ordering." Footprint and land pattern details are available at maxim-ic.com/packages.
MAX6310UK46D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V, 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
MAX6310UK46D3+T FAQ
1.How can I place an order for MAX6310UK46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6310UK46D3+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 MAX6310UK46D3+T reliable?
The price and inventory of MAX6310UK46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6310UK46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6310UK46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6310UK46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6310UK46D3+T?
MAX6310UK46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6310UK46D3+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 MAX6310UK46D3+T?
For technical support, including MAX6310UK46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6310UK46D3+T requirements.
6.How does Aetrix verify that MAX6310UK46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6310UK46D3+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 MAX6310UK46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6310UK46D3+T?
All MAX6310UK46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6310UK46D3+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 MAX6310UK46D3+T part is unused and in its original packaging.
Return procedure for MAX6310UK46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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