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Analog Devices Inc./Maxim Integrated MAX6307UK27D4-T
- Part No.:
- MAX6307UK27D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK27D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,135
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Product details
Overview
MAX6307UK27D4-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 2.7V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert an active-low push/pull RESET output. It features 1120ms 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 MAX6307UK27D4-T datasheet, MAX6307UK27D4-T pinout, MAX6307UK27D4-T application, or MAX6307UK27D4-T equivalent, key selection criteria include factory-trimmed 2.7V VCC threshold tolerance (±2.5% over -40°C to +85°C), dual external comparator inputs for auxiliary rail monitoring, 1120ms timeout stability over temperature, and SOT23-5 compatibility with manual-reset–capable designs.
Technical Context
The MAX6307UK27D4-T implements a triple-monitor architecture: internal factory-trimmed resistor divider sets the primary VCC reset threshold at 2.7V; RST IN compares external voltage against 1.23V reference for configurable undervoltage detection; OVRST IN uses the same reference for overvoltage detection. All three inputs feed a shared reset generator with a fixed 1120ms timeout period after recovery.
Its push/pull RESET output drives high/low actively (VOH = 0.8×VCC, VOL = 0.3V @ ISINK = 1.2mA), eliminating external pull-up components. The device ignores fast transients on all monitored inputs - validated up to 10µs duration for 100mV overdrive - and guarantees operation from VCC = 1.0V to 5.5V across 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.7V nominal, ±2.5% over 0°C to +70°C - ensures reliable 3.3V rail supervision with margin against dropout. |
| Reset Timeout Period | 1120ms minimum - provides sufficient hold time for slow-starting microcontrollers and power supplies. |
| Supply Current | 8µA typical at VCC = 5.5V - enables use in battery-backed or ultra-low-power portable systems. |
| RESET Output Type | Active-low push/pull - eliminates need for external pull-up resistor and supports direct drive of CMOS/TTL inputs. |
| Operating Voltage Range | 1.0V to 5.5V - guarantees valid RESET assertion even during deep brownout conditions before system shutdown. |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference - enables precise external rail monitoring via resistor dividers (e.g., 5V, 12V, or negative rails). |
| Transient Immunity | Immune to ≤10µs negative-going VCC transients at 100mV overdrive - prevents false resets in noisy power environments. |
Pinout & Package
MAX6307UK27D4-T is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert reset; sources current when deasserted - compatible with bidirectional µP reset pins without external components. |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance for noise immunity. |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external voltage (via resistor divider) to 1.23V reference; asserts reset if input falls below threshold. |
| 4 - OVRST IN | Adjustable overvoltage reset input | Compares external voltage to 1.23V reference; asserts reset if input exceeds threshold - enables dual-direction rail monitoring. |
| 5 - VCC | Main supply and primary monitored rail | Power source and input to internal trimmed divider; factory-set 2.7V reset threshold applies directly to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual external comparator inputs | RST IN and OVRST IN share 1.23V reference - allows independent monitoring of secondary rails (e.g., 5V, 12V, or negative supplies) with single IC. |
| Factory-trimmed 2.7V VCC threshold | ±2.5% accuracy over full temperature range - eliminates calibration effort for 3.3V system supervision. |
| 1120ms factory-programmed timeout | Guaranteed minimum delay ensures µP initialization completes before release - no timing capacitor or external RC network required. |
| Push/pull RESET output | Active drive both high and low - removes dependency on board-level pull-up resistors and improves noise margin vs. open-drain alternatives. |
| 1V VCC operating floor | RESET remains valid down to VCC = 1.0V - supports fail-safe behavior during catastrophic brownout prior to complete power loss. |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Monitoring 3.3V logic rail and 5V analog supply in battery-powered ECG units with isolated communication interfaces. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V rail (2.7V threshold), RST IN for 5V analog rail, OVRST IN unused; 1120ms timeout ensures ADC and display controller fully initialize. Use Value: Prevents firmware lockup during battery sag by asserting reset before logic corruption occurs, while dual-rail monitoring avoids silent analog subsystem failure. |
Use Scenario: Supervising main 3.3V MCU rail and backup 3.0V SRAM supply in handheld ultrasound devices with flash storage. IC Role / Device Role / Timing Role: VCC pin monitors 3.3V rail at 2.7V; RST IN monitors 3.0V SRAM rail; OVRST IN unused; push/pull RESET drives both MCU and memory reset lines simultaneously. Use Value: Ensures coordinated reset of processor and nonvolatile memory during power interruption - preventing data corruption in critical patient waveform buffers. |
| Automotive Body Control Units | Networking Edge Routers |
Use Scenario: Monitoring 5V microcontroller supply and 12V sensor interface rail in door module ECUs exposed to load-dump transients. IC Role / Device Role / Timing Role: VCC pin set to 2.7V (for 3.3V logic derived from 5V); RST IN monitors 5V rail; OVRST IN monitors 12V rail for overvoltage events during alternator regulation faults. Use Value: Detects both under- and overvoltage faults on separate domains - enabling safe shutdown before CAN bus errors or actuator misfire occur. |
Use Scenario: Supervising 3.3V CPU core, 5V PHY, and 12V fan supply in compact fanless edge routers with thermal throttling. IC Role / Device Role / Timing Role: VCC monitors 3.3V core; RST IN monitors 5V PHY; OVRST IN monitors 12V fan supply; 1120ms timeout accommodates slow thermal ramp-up of switching regulators. Use Value: Guarantees clean restart after thermal-induced voltage droop - avoiding packet loss or routing table corruption during sustained high-load operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK27D3-T | 140ms minimum reset timeout vs. 1120ms - shorter hold time, higher immunity to brief dips. | Suitable for fast-booting microcontrollers where long reset hold is unnecessary. | Select when system boot sequence completes in <200ms and transient rejection priority outweighs long timeout needs. |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 2.7V); only single VDD monitor; no RST IN/OVRST IN inputs; 200ms timeout. | Lacks dual external monitoring capability - limited to single-rail supervision. | Choose only for simple 3.3V-only systems where auxiliary rail monitoring is not required. |
Compared with MAX6307UK27D4-T, the D3 variant offers faster reset release but reduced safety margin for slow-start circuits, while TPS3808G33DBVR sacrifices flexibility and multi-rail coverage for lower cost and smaller footprint in single-supply applications.
Availability
MAX6307UK27D4-T is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, automotive body electronics, and networking equipment requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6307UK27D4-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, automotive, and communications applications, emphasizing reliability, low power, and integration.
The MAX6305–MAX6313 family delivers multi-input programmable reset supervision for complex multivoltage systems - targeting applications where simultaneous monitoring of primary, auxiliary, and overvoltage rails is essential for functional safety.
FAQ
What is the factory-programmed reset threshold voltage for MAX6307UK27D4-T?
The MAX6307UK27D4-T has a factory-trimmed VCC reset threshold of 2.7V nominal, with ±2.5% tolerance over the 0°C to +70°C operating temperature range. This value is laser-trimmed during production and applies specifically to the VCC pin; it is not user-adjustable. The "27" in the part number explicitly denotes the 2.7V threshold per Maxim's ordering convention.
Does MAX6307UK27D4-T support monitoring of voltages other than VCC?
Yes, MAX6307UK27D4-T supports monitoring of two additional voltages: RST IN accepts an externally divided voltage for undervoltage detection relative to the internal 1.23V reference, and OVRST IN performs overvoltage detection using the same reference. These inputs enable supervision of secondary rails like 5V, 12V, or negative supplies - independent of the 2.7V VCC threshold.
What is the reset timeout period for MAX6307UK27D4-T, and is it adjustable?
The MAX6307UK27D4-T features a factory-programmed reset timeout period of 1120ms minimum, indicated by the "D4" suffix. This timeout is fixed and non-adjustable - no external capacitor or resistor modifies it. The internal timer begins only after all monitored voltages (VCC, RST IN, OVRST IN) exceed their respective thresholds and holds RESET asserted for the full duration.
Can MAX6307UK27D4-T operate with VCC below 2.7V and still assert a valid RESET signal?
Yes, MAX6307UK27D4-T guarantees valid RESET assertion down to VCC = 1.0V. Its push/pull output maintains VOL ≤ 0.3V (at 1.2mA sink) and VOH ≥ 0.8×VCC even at low VCC, ensuring interoperability with logic inputs during brownout. However, RESET deassertion requires VCC > 2.7V × 1.025 (i.e., >2.768V) to clear the VCC monitor condition.
Is there a manual reset input (MR) on MAX6307UK27D4-T?
No, MAX6307UK27D4-T does not include a manual reset input. MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6307UK27D4-T pinout consists solely of RESET, GND, RST IN, OVRST IN, and VCC - confirmed by Maxim's official pin configuration diagram and selector table. Systems requiring MR must select a different variant (e.g., MAX6309UK27D4-T).
MAX6307UK27D4-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:
- 2.7V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK27D4-T FAQ
1.How can I place an order for MAX6307UK27D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK27D4-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 MAX6307UK27D4-T reliable?
The price and inventory of MAX6307UK27D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK27D4-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK27D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK27D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK27D4-T?
MAX6307UK27D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK27D4-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 MAX6307UK27D4-T?
For technical support, including MAX6307UK27D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK27D4-T requirements.
6.How does Aetrix verify that MAX6307UK27D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK27D4-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 MAX6307UK27D4-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK27D4-T?
All MAX6307UK27D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK27D4-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 MAX6307UK27D4-T part is unused and in its original packaging.
Return procedure for MAX6307UK27D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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