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Analog Devices Inc./Maxim Integrated MAX6307UK31D1-T
- Part No.:
- MAX6307UK31D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK31D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
MAX6307UK31D1-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) to assert an active-low push/pull RESET output. It features a factory-set 3.1V ±2.5% VCC reset threshold, 1ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6307UK31D1-T datasheet, MAX6307UK31D1-T pinout, MAX6307UK31D1-T application, or MAX6307UK31D1-T equivalent, this page delivers verified electrical parameters, thermal performance across -0°C to +70°C, SOT23-5 package mapping, and validated alternative options for dual-supply monitoring with manual-reset capability.
Technical Context
The MAX6307UK31D1-T implements a triple-input supervision architecture: internal factory-trimmed resistor divider for VCC monitoring at 3.1V nominal, external resistor-programmable RST IN comparator referenced to 1.23V, and OVRST IN comparator for overvoltage detection. All three inputs feed into a shared reset generator with a fixed 1ms timeout delay.
Its push/pull RESET output guarantees VOL ≤ 0.4V at ISINK = 3.2mA and VOH ≥ 0.8 × VCC at ISOURCE = 150µA, enabling direct interface with 3.3V/5V µP reset pins without external pull-up. Immunity to fast transients is achieved via internal filtering and hysteresis (2.5mV on RST IN/OVRST IN, 2×VTH on VTH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% (factory-trimmed; enables precise 3.3V rail supervision) |
| Reset Timeout Period | 1ms minimum (ensures sufficient µP initialization time after power stabilization) |
| Supply Current | 8µA typical at +25°C (supports battery-powered portable equipment) |
| Operating Temperature | -0°C to +70°C (commercial-grade qualification for PC and industrial control) |
| RESET Output Type | Active-low push/pull (drives µP reset pin directly; no external pull-up required) |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference (allows resistor-divider programming of custom undervoltage/overvoltage trip points) |
| Guaranteed RESET Validity | Down to VCC = 1V (ensures deterministic reset assertion during deep brownout) |
Pinout & Package
MAX6307UK31D1-T is housed in a 5-pin SOT23-5 surface-mount package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts in portable and multivoltage systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Asserts low during fault; sinks 3.2mA / sources 150µA; interfaces directly with µP reset pin |
| 2 - GND | System ground reference | Common return path for all internal comparators and output stage |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external voltage divider against 1.23V reference; asserts reset if input falls below threshold |
| 4 - OVRST IN | Adjustable overvoltage reset input | Compares external voltage divider against 1.23V reference; asserts reset if input exceeds threshold |
| 5 - VCC | Main supply and primary monitored rail | Powered from system 3.3V/5V rail; internally monitored at 3.1V threshold; powers all circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring inputs | VCC (3.1V), RST IN (programmable undervoltage), OVRST IN (programmable overvoltage) - enables full rail health coverage in 3V/5V systems |
| Factory-set precision reset threshold | 3.1V ±2.5% over -0°C to +70°C - eliminates external resistor calibration for main supply supervision |
| Transient-immune supervision | Immune to VCC transients <1.4µs at 3.1V overdrive - prevents false resets from switching noise or ESD |
| No external components required | Self-contained supervision with internal reference, timer, and output driver - reduces BOM count and layout area |
| Guaranteed operation down to VCC = 1V | RESET remains valid logic-low until VCC drops to 1V - ensures fail-safe behavior during severe brownout |
Applications
| Industrial PLC Power Sequencing | 3.3V/5V Dual-Rail Embedded Controller |
|---|---|
|
Use Scenario: Monitoring both 5V I/O and 3.3V core rails in a programmable logic controller during cold start and load transients. IC Role / Device Role / Timing Role: Supervisory IC asserting synchronized reset to ARM Cortex-M7 MCU and FPGA configuration logic until both rails stabilize above thresholds. Use Value: Prevents partial initialization and state corruption by enforcing 1ms minimum hold time after both 5V and 3.3V exceed their respective thresholds (3.1V and resistor-programmed 2.97V). |
Use Scenario: Ensuring safe boot sequence in a medical sensor node powered by Li-ion battery and regulated 3.3V/5V outputs. IC Role / Device Role / Timing Role: Triple-input supervisor detecting VCC brownout, battery undervoltage (via RST IN), and regulator overvoltage (via OVRST IN) to trigger controlled shutdown. Use Value: Enables single-chip fault coverage across supply, battery, and LDO integrity - eliminating need for discrete comparators and timers. |
| Portable Test Instrument Power Management | Automated Test Equipment (ATE) Board-Level Reset |
|
Use Scenario: Managing power-up sequencing and fault response in handheld oscilloscope with analog front-end, ADC, and display subsystems. IC Role / Device Role / Timing Role: Asserting RESET to microcontroller and FPGA only after stable 3.3V and 5V supplies are confirmed, while rejecting sub-microsecond switching glitches. Use Value: Achieves 8µA quiescent current and glitch immunity per Typical Operating Characteristics (TOC07), extending battery life and improving measurement reliability. |
Use Scenario: Providing board-level reset coordination across multiple FPGAs and DACs on high-density ATE backplane with mixed 3.3V/5V domains. IC Role / Device Role / Timing Role: Centralized reset arbiter using RST IN to monitor auxiliary 12V bias supply and OVRST IN to detect 5V rail overvoltage events. Use Value: Delivers deterministic 1ms timeout and push/pull drive strength (3.2mA sink) to meet tight timing budgets and drive heavy capacitive loads on long traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-input supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK31D2-T | Same 3.1V VCC threshold but 20ms min reset timeout (vs. 1ms) | Suitable where longer reset hold time is needed for slow-start regulators or complex FPGA configuration | Select when system requires >1ms reset assertion to ensure complete power rail settling before release |
| TPS3808G31DBVR | 3.08V threshold (±0.5%), 2% accuracy, 350ms default timeout, open-drain output | Lacks OVRST IN; supports only VCC + one adjustable input; requires external pull-up | Choose for higher threshold accuracy and lower temperature drift, but only if overvoltage monitoring is handled externally |
Compared with MAX6307UK31D1-T, MAX6307UK31D2-T extends reset duration for slower power systems, while TPS3808G31DBVR trades overvoltage detection and push/pull drive for tighter threshold tolerance and lower drift - making each suitable for distinct supervision priorities in multirail designs.
Availability
MAX6307UK31D1-T is available at Aetrix Electronics and suitable for industrial PLCs, portable test instruments, embedded controllers, and automated test equipment requiring stable component supply across commercial temperature range and long-term production continuity.
Supply support for MAX6307UK31D1-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 high-reliability industrial and computing solutions.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in PCs, controllers, and intelligent instruments - delivering integrated triple-input monitoring, factory-programmed thresholds, and transient-hardened operation in minimal SOT23-5 footprint.
FAQ
What is the factory-programmed VCC reset threshold for MAX6307UK31D1-T?
The MAX6307UK31D1-T has a factory-programmed VCC reset threshold of 3.1V with ±2.5% tolerance over the -0°C to +70°C operating range. This value is laser-trimmed during production and corresponds to the "31" in the part number per Table 1 of the datasheet. The threshold is implemented via an internal resistor divider and does not require external components.
Does MAX6307UK31D1-T support overvoltage detection on inputs other than VCC?
Yes, MAX6307UK31D1-T supports overvoltage detection via its dedicated OVRST IN pin (Pin 4). When configured with an external resistor divider, this input compares the monitored voltage against the internal 1.23V reference and asserts RESET if the divided voltage exceeds that threshold - enabling precise overvoltage supervision of auxiliary rails like 12V or 24V.
What is the minimum VCC voltage at which MAX6307UK31D1-T guarantees valid RESET output?
MAX6307UK31D1-T guarantees valid RESET output down to VCC = 1V. Below this level, the push/pull driver's sink/source capability degrades, and RESET may no longer maintain a defined logic state. This specification ensures deterministic reset assertion during deep brownout conditions common in battery-backed systems.
Can MAX6307UK31D1-T be used in systems requiring manual reset functionality?
No, MAX6307UK31D1-T does not include a manual reset (MR) input. Unlike MAX6306/MAX6309/MAX6312 variants, the MAX6307 family omits MR to accommodate its dual adjustable inputs (RST IN and OVRST IN) within the 5-pin SOT23 package. For manual reset capability, consider MAX6309UK31D1-T or MAX6312UK31D1-T instead.
What package type and RoHS status does MAX6307UK31D1-T use?
MAX6307UK31D1-T uses a 5-pin SOT23-5 package (package code U5+1, outline 21-0057) with lead-free termination. The "-T" suffix denotes tape-and-reel packaging with RoHS-compliant, lead-free finish. Footprint land pattern 90-0174 is recommended for PCB layout per Maxim's package documentation.
MAX6307UK31D1-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:
- 1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK31D1-T FAQ
1.How can I place an order for MAX6307UK31D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK31D1-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 MAX6307UK31D1-T reliable?
The price and inventory of MAX6307UK31D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK31D1-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK31D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK31D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK31D1-T?
MAX6307UK31D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK31D1-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 MAX6307UK31D1-T?
For technical support, including MAX6307UK31D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK31D1-T requirements.
6.How does Aetrix verify that MAX6307UK31D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK31D1-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 MAX6307UK31D1-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK31D1-T?
All MAX6307UK31D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK31D1-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 MAX6307UK31D1-T part is unused and in its original packaging.
Return procedure for MAX6307UK31D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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