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Analog Devices Inc./Maxim Integrated MAX6307UK31D2-T
- Part No.:
- MAX6307UK31D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK31D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
The MAX6307UK31D2-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC, an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting an active-low push/pull RESET output when any threshold is violated. It features a factory-set 3.08V ±1.5% VCC reset threshold, 20ms minimum reset timeout, operates from 0°C to +70°C, and draws only 8µA supply current - ideal for multivoltage embedded systems requiring reliable brownout and transient immunity.
For engineers reviewing the MAX6307UK31D2-T datasheet, MAX6307UK31D2-T pinout, MAX6307UK31D2-T application, or MAX6307UK31D2-T equivalent, key selection criteria include its dual-input monitoring capability (VCC + RST IN + OVRST IN), guaranteed RESET validity down to VCC = 1V, immunity to fast transients (<100ns), manual-reset compatibility, and factory-programmed timing without external components.
Technical Context
The MAX6307UK31D2-T implements a triple-monitoring architecture: internal factory-trimmed resistor divider sets the 3.08V VCC threshold; RST IN compares external voltage against a precise 1.23V reference; OVRST IN provides overvoltage detection using the same reference. All comparators feature 2.5mV hysteresis and are designed to reject transients up to ~100ns at typical overdrive levels.
Its push/pull RESET output guarantees VOL ≤ 0.3V at ISINK = 1.2mA and VOH ≥ 0.8×VCC at ISOURCE = 500µA, enabling direct interface with 3.3V/5V µP reset inputs without pull-up resistors. The internal reset timer starts only after all monitored voltages stabilize above their thresholds, ensuring clean power-on sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V ±1.5% at +25°C; factory-trimmed for stable brownout detection in 3.3V systems |
| Reset Timeout Period | 20ms minimum; ensures µP completes power stabilization before release |
| Supply Current | 8µA typical at +25°C; enables multi-year battery life in portable equipment |
| RESET Output Type | Active-low push/pull; eliminates need for external pull-up and supports bidirectional µP reset pins |
| Operating Temperature | 0°C to +70°C; suitable for commercial-grade computing and industrial control environments |
| Input Reference Voltage | 1.23V ±0.03V on RST IN/OVRST IN; enables precise external threshold programming via resistor dividers |
| Transient Immunity | Rejects VCC glitches <100ns wide at typical overdrive; prevents false resets in noisy power rails |
Pinout & Package
Package: 5-pin SOT23 (U5+1), 2.9mm × 1.6mm footprint, lead-free compatible (-T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives µP reset pin directly; sinks 1.2mA or sources 500µA; valid down to VCC = 1V |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external voltage to 1.23V reference; asserts reset when input falls below threshold |
| 4 - OVRST IN | Adjustable overvoltage reset input | Compares external voltage to 1.23V reference; asserts reset when input exceeds threshold |
| 5 - VCC | Main supply and primary monitor input | Power source and monitored rail; internal trimmed divider sets 3.08V reset point |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | Simultaneously supervises VCC (3.08V), external undervoltage (RST IN), and external overvoltage (OVRST IN) |
| No external timing components | Factory-programmed 20ms reset timeout eliminates capacitor tolerance and aging concerns |
| Guaranteed operation to 1V VCC | RESET remains logic-valid even during deep brownout, preventing undefined µP state |
| Manual reset input support | MR-compatible design (via MAX6306/MAX6309/MAX6312 family sharing) enables operator-initiated recovery |
| Low-power precision reference | 1.23V bandgap reference with ±0.03V tolerance enables accurate external threshold setting |
Applications
| Industrial PLC I/O Modules | Medical Patient Monitor Power Sequencing |
|---|---|
Use Scenario: Monitoring 3.3V microcontroller supply and 24V fieldbus interface voltage in harsh industrial environments with EMI-induced transients. IC Role / Device Role / Timing Role: Triple-input supervisor ensuring coordinated reset of µP and interface ASIC upon either 3.3V brownout or 24V overvoltage fault. Use Value: Prevents corrupted communication states by asserting RESET within 500ns of threshold violation while ignoring <100ns noise spikes. | Use Scenario: Managing power-up sequence for dual-rail (5V analog front-end + 3.3V digital core) in battery-powered diagnostic devices. IC Role / Device Role / Timing Role: Primary VCC monitor (3.08V) triggers 20ms delay before releasing µP reset, while RST IN validates 5V rail stability. Use Value: Eliminates need for discrete RC timers and two separate supervisors, reducing BOM count and PCB area by 35%. |
| Automotive Body Control Module | Network Router Power Management |
Use Scenario: Supervising 5V system rail and 12V lighting driver supply in temperature-cycled automotive cabin modules. IC Role / Device Role / Timing Role: VCC monitor detects 5V dropout; OVRST IN guards against load-dump transients on 12V line; both trigger common RESET signal. Use Value: Single IC replaces dual-supervisor solution, cutting cost and improving thermal margin via 8µA quiescent current. | Use Scenario: Ensuring clean boot of ARM-based SoC and Gigabit Ethernet PHY during AC power restoration with residual ripple. IC Role / Device Role / Timing Role: Monitors 3.3V SoC supply (VCC) and 1.8V PHY supply (via RST IN divider); asserts RESET until both stabilize for ≥20ms. Use Value: Guarantees deterministic boot state across voltage domains, eliminating rare lockup failures observed with discrete RC resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK31D3-T | Same 3.08V VCC threshold and pinout, but 140ms minimum reset timeout instead of 20ms | Better suited for systems with slower power ramp rates or higher capacitance on reset-sensitive rails | Select when longer reset hold time is required to accommodate slow-start DC/DC converters |
| TPS3808G33DBVR | 3.3V fixed threshold, 20ms timeout, SOT23-6 package, no OVRST IN; 1.6µA supply current | Lacks overvoltage monitoring and RST IN flexibility; optimized for ultra-low-power single-rail applications | Choose only if overvoltage detection is unnecessary and 1.6µA quiescent current outweighs triple-monitoring capability |
Compared with MAX6307UK31D3-T and TPS3808G33DBVR, the MAX6307UK31D2-T uniquely balances triple-input supervision, 20ms timing precision, and 8µA consumption in a 5-pin SOT23 - making it optimal for space-constrained multivoltage systems where overvoltage fault coverage is mandatory.
Availability
The MAX6307UK31D2-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6307UK31D2-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 power, sensing, and interface applications, with emphasis on reliability and integration.
The MAX6305–MAX6313 product line delivers highly configurable, low-power supervisory circuits for multivoltage embedded systems - engineered to replace discrete reset solutions with guaranteed timing, transient immunity, and minimal external components.
FAQ
What is the exact factory-programmed VCC reset threshold for MAX6307UK31D2-T?
The MAX6307UK31D2-T has a factory-programmed VCC reset threshold of 3.08V, with ±1.5% tolerance at +25°C and ±2.5% over the full 0°C to +70°C operating range. This value corresponds to the "31" in the part number per Table 1 of the datasheet, and is set via internal laser-trimmed resistors for high accuracy without calibration.
Does MAX6307UK31D2-T support manual reset functionality?
The MAX6307UK31D2-T does not include a dedicated MR (manual reset) input pin. Unlike MAX6306/MAX6309/MAX6312 variants, the MAX6307/MAX6310/MAX6313 family omits MR but adds OVRST IN. Manual reset must be implemented externally - for example, by pulling RST IN low through a switch - since no internal MR circuitry exists in the MAX6307UK31D2-T.
What are the absolute maximum ratings for MAX6307UK31D2-T VCC and other pins?
The MAX6307UK31D2-T absolute maximum VCC rating is -0.3V to +6V. All other pins (RESET, RST IN, OVRST IN) tolerate -0.3V to (VCC + 0.3V). Exceeding these limits risks permanent damage. Continuous power dissipation in SOT23 is 571mW at +70°C, derating 7.1mW/°C above that temperature.
Can MAX6307UK31D2-T monitor a 5V rail while supervising a 3.3V microcontroller?
Yes - the MAX6307UK31D2-T monitors its own VCC pin (set to 3.08V for 3.3V systems) while simultaneously supervising a 5V rail via the OVRST IN pin. Configure OVRST IN with a resistor divider so that 5V produces >1.23V at the pin; reset asserts when 5V exceeds the programmed overvoltage threshold. This dual-rail capability is intrinsic to the MAX6307UK31D2-T's architecture.
Is MAX6307UK31D2-T pin-compatible with other MAX630x devices in SOT23-5?
Yes - all MAX6305–MAX6313 devices use identical SOT23-5 pinouts. Pin 1 is RESET, Pin 2 is GND, Pin 3 is RST IN, Pin 4 is OVRST IN (or MR on other variants), and Pin 5 is VCC. However, function differs per variant: MAX6307UK31D2-T uses Pin 4 as OVRST IN, whereas MAX6306 uses it as MR. Always verify functional pin mapping, not just physical layout.
MAX6307UK31D2-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:
- 3.08V, Adj
- Output:
- Open Drain or Open Collector
- 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
MAX6307UK31D2-T FAQ
1.How can I place an order for MAX6307UK31D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK31D2-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 MAX6307UK31D2-T reliable?
The price and inventory of MAX6307UK31D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK31D2-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK31D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK31D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK31D2-T?
MAX6307UK31D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK31D2-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 MAX6307UK31D2-T?
For technical support, including MAX6307UK31D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK31D2-T requirements.
6.How does Aetrix verify that MAX6307UK31D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK31D2-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 MAX6307UK31D2-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK31D2-T?
All MAX6307UK31D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK31D2-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 MAX6307UK31D2-T part is unused and in its original packaging.
Return procedure for MAX6307UK31D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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