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Analog Devices Inc./Maxim Integrated MAX6307UK44D3+T
- Part No.:
- MAX6307UK44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK44D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,310
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Product details
Overview
The MAX6307UK44D3+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 4.4V reset 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 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring robust power-up/brownout protection.
For engineers reviewing the MAX6307UK44D3+T datasheet, MAX6307UK44D3+T pinout, MAX6307UK44D3+T application, or MAX6307UK44D3+T equivalent, this page delivers verified technical context, factory-programmed specifications, SOT23-5 terminal mapping, real-world use cases, and validated alternative options for dual-supply monitoring designs.
Technical Context
The MAX6307UK44D3+T implements a triple-monitor architecture: internal factory-trimmed voltage divider for VCC supervision at 4.4V ±2.5%, external resistor-divider–based RST IN for configurable undervoltage detection, and OVRST IN for overvoltage detection referenced to 1.23V. All three inputs feed independent comparators with 2.5mV hysteresis.
Its push/pull RESET output drives low with 0.3V max VOL at 1.2mA sink and maintains valid logic levels down to VCC = 1V. The 140ms (min) timeout is factory-programmed via the "D3" suffix and remains stable across -40°C to +85°C with <±0.5% variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.4V ±2.5% at -40°C to +85°C - factory-trimmed for precise 5V rail supervision without external components |
| Reset Timeout Period | 140ms (min) - fixed factory setting ensures reliable µP initialization after power stabilization |
| Supply Current | 8µA typical at +25°C - enables battery-backed operation in portable equipment |
| RESET Output Type | Active-low push/pull - eliminates external pull-up resistor and supports direct interface to CMOS/TTL µP reset pins |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference - allows programmable undervoltage/overvoltage detection using two-resistor dividers |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive-adjacent embedded control environments |
| VCC Validity Range | 1.0V to 5.5V - RESET remains asserted and valid even during deep brownout conditions |
Pinout & Package
Package: 5-pin SOT23 (U5+1 outline, 21-0057), RoHS-compliant lead-free, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low (≤0.3V @ 1.2mA) to hold microprocessor in reset; 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 - OVRST IN | Overvoltage reset comparator input | Asserts RESET when external voltage exceeds programmed threshold (via resistor divider to 1.23V ref) |
| 4 - RST IN | Undervoltage reset comparator input | Asserts RESET when external voltage falls below programmed threshold (via resistor divider to 1.23V ref) |
| 5 - VCC | Main supply and primary monitored rail | Supplies internal circuitry and is monitored at factory-set 4.4V threshold; minimum operating voltage = 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | VCC (4.4V), RST IN (programmable undervoltage), OVRST IN (programmable overvoltage) - enables full rail health coverage in single IC |
| Factory-programmed timing | 140ms min reset timeout (D3) - eliminates timing capacitor variability and board space |
| Transient immunity | Immune to fast VCC transients ≤100ns (at 4.4V threshold) - prevents false resets during switching noise |
| No external components required | Internal 1.23V reference, trimmed VCC divider, and push/pull output - reduces BOM count and layout complexity |
| Guaranteed operation down to 1V | RESET remains valid and asserted until VCC ≥1V - ensures deterministic behavior during deep brownout recovery |
Applications
| Industrial PLC Power Monitoring | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5V microcontroller supply and 12V system bus in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET to ARM Cortex-M4 core during VCC dip or 12V overvoltage event; 140ms timeout ensures firmware reload completion. Use Value: Prevents erratic I/O state transitions by guaranteeing µP reset assertion during 12V bus transients up to ±100V/µs slew rate. |
Use Scenario: Embedded in body control unit to supervise 5V MCU rail and 3.3V sensor interface rail against load-dump-induced overvoltage and battery brownout. IC Role / Device Role / Timing Role: Dual-threshold supervisor using RST IN for 3.3V rail undervoltage and OVRST IN for 12V load-dump detection; VCC pin monitors main 5V supply. Use Value: Enables single-chip response to ISO 7637-2 pulse 5a (load dump) and pulse 4 (cold crank), eliminating need for discrete TVS + reset IC combo. |
| Medical Portable Diagnostic Device | Networking Edge Router Power Sequencing |
|
Use Scenario: Battery-powered ultrasound handheld with dual-rail (5V analog front-end, 3.3V digital processor) requiring fail-safe startup and brownout recovery. IC Role / Device Role / Timing Role: Resets DSP and FPGA on any rail fault; uses RST IN to monitor 3.3V LDO output and OVRST IN to detect 5V boost converter overvoltage. Use Value: 8µA quiescent current extends battery life; 140ms timeout aligns with FPGA configuration time, preventing partial bitstream loading. |
Use Scenario: 48V PoE-powered edge router where 5V and 3.3V rails must sequence correctly and remain stable under dynamic Ethernet traffic loads. IC Role / Device Role / Timing Role: Monitors primary 5V rail (VCC = 4.4V threshold) and secondary 3.3V rail (RST IN) while detecting 48V surge via OVRST IN through resistive divider. Use Value: Push/pull RESET drives multiple ASIC reset pins simultaneously without fanout buffers; 1V VCC operation ensures reset holds during PoE negotiation dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-input supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK44D2+T | Same package, VCC threshold, and inputs, but 20ms (min) reset timeout (D2 suffix) | Insufficient for µP boot sequences >20ms; suitable only for simple logic reset or fast-recovery systems | Select only if system firmware initializes in <20ms and transient immunity requirements match |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V fixed threshold, open-drain output, 200ms timeout, 1.6µA ICC | Lacks RST IN/OVRST IN capability; requires external pull-up; not suitable for multirail or overvoltage detection | Use only for cost-sensitive single-rail 3.3V applications where overvoltage/undervoltage monitoring is handled externally |
Compared with MAX6307UK44D2+T and TPS3808G33DBVR, the MAX6307UK44D3+T uniquely delivers factory-set 4.4V VCC supervision, dual-programmable inputs, and 140ms timeout in one SOT23-5 package-enabling compact, robust multivoltage system reset without design compromises.
Availability
MAX6307UK44D3+T is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical portable diagnostics, networking edge routers, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6307UK44D3+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 industrial, communications, and computing applications, with emphasis on high-reliability power management and interface solutions.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained, noise-prone embedded systems-delivering triple-input monitoring, factory-programmed thresholds/timing, and ultra-low power in SOT23-5.
FAQ
What is the exact factory-programmed reset threshold voltage for MAX6307UK44D3+T?
The MAX6307UK44D3+T has a factory-programmed VCC reset threshold of 4.4V, specified as 4.4V ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the official datasheet and corresponds to the "44" in the part number. The MAX6307UK44D3+T uses an internal trimmed resistor divider to achieve this precise threshold without external components.
Does MAX6307UK44D3+T support overvoltage detection on external rails?
Yes, the MAX6307UK44D3+T supports overvoltage detection via its OVRST IN pin, which compares an external voltage (set by a resistor divider) to an internal 1.23V reference. When the divided voltage exceeds 1.23V, the device asserts RESET. This capability is explicitly documented in the Pin Description and Detailed Description sections for MAX6307/MAX6310/MAX6313 variants, confirming full functionality for the MAX6307UK44D3+T.
What is the reset timeout period for MAX6307UK44D3+T and how is it set?
The MAX6307UK44D3+T has a factory-programmed minimum reset timeout period of 140ms, indicated by the "D3" suffix per the Ordering Information table. This value is guaranteed over temperature and does not require external timing components. Electrical Characteristics confirm tRP = 140ms (min), 200ms (typ), 280ms (max) at -40°C to +85°C, making it suitable for most microprocessor initialization sequences.
Can MAX6307UK44D3+T operate with VCC below 2.5V?
Yes, the MAX6307UK44D3+T guarantees valid RESET assertion down to VCC = 1.0V, as stated in both the Features list ("Guaranteed RESET Valid to VCC = 1V") and Electrical Characteristics table. Unlike some supervisors that disable below 2.5V, this device maintains functional reset output integrity during deep brownout conditions, enabling safe system recovery in low-voltage scenarios.
What package type and RoHS status does MAX6307UK44D3+T use?
The MAX6307UK44D3+T is supplied in a 5-pin SOT23 package (outline U5+1, 21-0057) with lead-free termination, as confirmed by the "+T" suffix per Maxim's ordering conventions. The Package Information section states that "+" indicates RoHS compliance, and the Standard Versions Table explicitly lists MAX6307UKxxDx+T variants as available in lead-free packaging.
MAX6307UK44D3+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:
- 4.38V, Adj
- Output:
- Open Drain or Open Collector
- 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
MAX6307UK44D3+T FAQ
1.How can I place an order for MAX6307UK44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK44D3+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 MAX6307UK44D3+T reliable?
The price and inventory of MAX6307UK44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6307UK44D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK44D3+T transactions.
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4.How is shipping managed for MAX6307UK44D3+T?
MAX6307UK44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK44D3+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 MAX6307UK44D3+T?
For technical support, including MAX6307UK44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK44D3+T requirements.
6.How does Aetrix verify that MAX6307UK44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK44D3+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 MAX6307UK44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6307UK44D3+T?
All MAX6307UK44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK44D3+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 MAX6307UK44D3+T part is unused and in its original packaging.
Return procedure for MAX6307UK44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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