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Analog Devices Inc./Maxim Integrated MAX6310UK29D2-T
- Part No.:
- MAX6310UK29D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6310UK29D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,506
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Product details
Overview
The MAX6310UK29D2-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 2.9V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting a push/pull active-low RESET output 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 reliable power-on and brownout reset.
For engineers reviewing the MAX6310UK29D2-T datasheet, MAX6310UK29D2-T pinout, MAX6310UK29D2-T application, or MAX6310UK29D2-T equivalent, key selection considerations include its dual-input monitoring capability (VCC + RST IN + OVRST IN), factory-trimmed 2.9V VCC threshold with ±2.5% tolerance over temperature, 20ms reset timeout, SOT23-5 package compatibility, and immunity to fast VCC transients.
Technical Context
The MAX6310UK29D2-T implements a triple-monitor architecture: internal factory-trimmed resistor divider for VCC supervision at 2.9V 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 push/pull RESET output sinks ≥3.2mA at VCC > 4.25V and remains valid down to VCC = 1V.
It uses a precision internal timer to enforce a minimum 20ms (D2) reset assertion period after all monitored supplies return to regulation, and incorporates glitch rejection on MR (1.5µs min pulse width) and transient immunity on all inputs-validated up to 100µs for 100mV overdrive on VCC and RST IN/OVRST IN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.9V 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 signal meets minimum assertion time 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-low push/pull - drives logic directly without external pull-up; sinks 3.2mA at VCC > 4.25V |
| Operating VCC Range | 2.97V to 5.5V - supports operation across full 3.3V system margin and 5V legacy rails |
| Input Reference Voltage | 1.23V ±0.03V - stable bandgap reference enabling accurate external resistor-divider programming of RST IN/OVRST IN |
| MR Input Logic | TTL/CMOS-compatible with 63.5kΩ internal pull-up - allows direct switch-to-ground manual reset without external components |
Pinout & Package
MAX6310UK29D2-T is housed in a RoHS-compliant 5-pin SOT23-5 package (outline U5+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RESET (active-low push/pull), Pin 2 is GND, Pin 3 is OVRST IN, Pin 4 is RST IN, and Pin 5 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Push/pull driver asserts low during fault; no external pull-up required; valid to VCC = 1V |
| 2 - GND | System ground reference | Common return for all internal comparators, timer, and output stage; must be low-impedance |
| 3 - OVRST IN | Overvoltage reset comparator input | Asserts RESET when voltage exceeds programmed threshold via external resistor divider; immune to transients |
| 4 - RST IN | Undervoltage reset comparator input | Asserts RESET when voltage falls below programmed threshold; 25nA max input leakage enables MΩ-scale dividers |
| 5 - VCC | Main supply and monitored rail | Powered from system 3.3V/5V rail; internally monitored at factory-trimmed 2.9V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC (2.9V), external undervoltage (RST IN), and external overvoltage (OVRST IN) |
| No external components required | Factory-trimmed thresholds, internal pull-up on MR, and self-contained timing eliminate BOM cost and layout area |
| Transient-immune supervision | Guaranteed immunity to VCC transients ≤100µs at 100mV overdrive - prevents false resets in noisy environments |
| Guaranteed RESET down to VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe embedded control |
| Manual reset with glitch rejection | MR accepts 1.5µs minimum pulses and includes internal ESD protection and noise filtering guidance |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Power sequencing and fault detection in DIN-rail mounted I/O modules with mixed 24V field power and 3.3V logic rails. IC Role / Device Role / Timing Role: Supervises 3.3V logic supply (VCC), 24V field bus (via RST IN divider), and overvoltage on auxiliary 5V rail (via OVRST IN), asserting RESET within 1µs of violation. Use Value: Prevents firmware corruption during field-wiring faults or load-dump events by enforcing coordinated reset across analog, digital, and communication subsystems. |
Use Scenario: Battery-backed vital-sign acquisition units requiring guaranteed boot integrity after cold start or low-battery recovery. IC Role / Device Role / Timing Role: Monitors main Li-ion battery (RST IN), regulated 3.3V rail (VCC = 2.9V threshold), and backup coin-cell voltage (OVRST IN), holding RESET until all rails stabilize for ≥20ms. Use Value: Eliminates risk of sensor misreadings or alarm suppression due to partial initialization - mandated for Class IIa medical device certification. |
| Automotive Body Control Modules | Point-of-Sale Terminal Power Management |
Use Scenario: Supervision of 5V microcontroller core and 12V CAN transceiver supply in non-engine compartments subject to load dump and cold-crank. IC Role / Device Role / Timing Role: Uses VCC (2.9V) for 3.3V logic rail, RST IN for 5V domain, and OVRST IN for 12V line - detects both under- and overvoltage faults independently. Use Value: Enables single-chip reset coordination across safety-critical domains without external comparators or timers, reducing ASIL decomposition effort. |
Use Scenario: Dual-rail (5V USB + 3.3V logic) payment terminals operating from unregulated wall adapters with high ripple. IC Role / Device Role / Timing Role: VCC monitors 3.3V logic rail at 2.9V, RST IN tracks 5V rail, and OVRST IN guards against adapter overvoltage - all with shared 20ms timeout. Use Value: Ensures PCI PTS v6.0 compliance by guaranteeing secure boot sequence integrity despite AC-line disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D2-T | Same SOT23-5 package, identical 2.9V VCC threshold and D2 (20ms) timeout, but only monitors VCC - no RST IN or OVRST IN inputs | Suitable only for single-rail systems; lacks dual external monitoring capability of MAX6310UK29D2-T | Select when cost reduction is prioritized and external rail supervision is handled elsewhere |
| TPS3808G33DBVR | 3.3V fixed VCC threshold, 20ms timeout, SOT23-6 package; includes watchdog timer not present in MAX6310UK29D2-T | Requires additional pin for WDI; no overvoltage input; higher 12µA quiescent current vs. 8µA | Choose if watchdog functionality is needed and board layout accommodates 6-pin footprint |
Compared with MAX6326UT29D2-T and TPS3808G33DBVR, the MAX6310UK29D2-T uniquely delivers triple-rail supervision (VCC + RST IN + OVRST IN) in a 5-pin SOT23 while maintaining lowest supply current - making it optimal for space-constrained multivoltage systems where external monitoring integration is essential.
Availability
MAX6310UK29D2-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body controllers, and POS terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6310UK29D2-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, medical, and automotive applications, emphasizing reliability, low power, and integration.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained embedded systems, combining factory-programmed accuracy with flexible external monitoring and minimal external component count.
FAQ
What is the exact factory-programmed VCC reset threshold for MAX6310UK29D2-T?
The MAX6310UK29D2-T has a factory-trimmed VCC reset threshold of 2.9V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +85°C. This value is laser-trimmed during production and corresponds to the "29" in the part number per Maxim's Table 1. The actual measured threshold for a given unit falls between 2.828V and 2.972V at +25°C.
Does MAX6310UK29D2-T support manual reset, and how is it implemented?
Yes, MAX6310UK29D2-T includes a dedicated MR (manual reset) input on Pin 4. It features an internal 63.5kΩ pull-up resistor, so the pin can be left floating for normal operation. Pulling MR low (≤0.3×VCC) forces RESET active for the full timeout period (20ms minimum) after MR returns high. The input accepts TTL/CMOS logic levels and rejects glitches shorter than 1.5µs.
Can MAX6310UK29D2-T monitor both overvoltage and undervoltage on the same external rail?
No - MAX6310UK29D2-T dedicates separate pins for each function: Pin 3 (OVRST IN) is for overvoltage detection only, and Pin 4 (RST IN) is for undervoltage detection only. Each requires its own resistor divider network. They cannot share a single external node; attempting to connect both inputs to the same rail would cause conflicting comparator behavior and invalid reset assertion.
What is the minimum VCC voltage at which MAX6310UK29D2-T guarantees valid RESET output?
MAX6310UK29D2-T guarantees valid RESET output down to VCC = 1V. Below this level, the push/pull driver's sink/source capability degrades significantly. The datasheet specifies VOL ≤ 0.3V at ISINK = 50µA when VCC > 1.0V, confirming functional reset assertion even during deep brownout conditions common in battery-powered systems.
Is MAX6310UK29D2-T compatible with lead-free PCB assembly processes?
Yes, MAX6310UK29D2-T is offered in lead-free packaging. The "-T" suffix denotes tape-and-reel packaging with lead-free terminations compliant with JEDEC J-STD-020 reflow profiles. Peak reflow temperature is rated at +260°C for 10 seconds. For legacy leaded assembly, the non-"+T" variant is not available - only lead-free versions are currently manufactured and stocked.
MAX6310UK29D2-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:
- 2.93V, Adj
- 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
MAX6310UK29D2-T FAQ
1.How can I place an order for MAX6310UK29D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6310UK29D2-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 MAX6310UK29D2-T reliable?
The price and inventory of MAX6310UK29D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6310UK29D2-T is usually 5 days.
3.What payment methods are accepted for MAX6310UK29D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6310UK29D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6310UK29D2-T?
MAX6310UK29D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6310UK29D2-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 MAX6310UK29D2-T?
For technical support, including MAX6310UK29D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6310UK29D2-T requirements.
6.How does Aetrix verify that MAX6310UK29D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6310UK29D2-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 MAX6310UK29D2-T meets industry standards.
7.What is the process for return or replacement of MAX6310UK29D2-T?
All MAX6310UK29D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6310UK29D2-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 MAX6310UK29D2-T part is unused and in its original packaging.
Return procedure for MAX6310UK29D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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