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Analog Devices Inc./Maxim Integrated MAX6307UK28D1-T
- Part No.:
- MAX6307UK28D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK28D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,950
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Product details
Overview
MAX6307UK28D1-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set to 2.8V ±2.5%), RST IN (undervoltage), and OVRST IN (overvoltage) to assert an active-low push/pull RESET output. It features 1ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems for reliable power-up/brownout reset control.
For engineers reviewing the MAX6307UK28D1-T datasheet, MAX6307UK28D1-T pinout, MAX6307UK28D1-T application, or MAX6307UK28D1-T equivalent, key selection considerations include its dual-input undervoltage/overvoltage monitoring capability, factory-trimmed 2.8V VCC threshold, 1ms reset timeout, SOT23-5 package compatibility, and manual-reset support via MR pin.
Technical Context
The MAX6307UK28D1-T implements a triple-monitor architecture: internal factory-trimmed resistor divider sets VCC reset threshold at 2.8V; external resistor dividers program RST IN (undervoltage) and OVRST IN (overvoltage) thresholds referenced to 1.23V internal bandgap. All three comparators feed a shared reset generator with programmable 1ms timeout.
Its push/pull RESET output drives high/low actively (VOH = 0.8×VCC, VOL = 0.3V @ ISINK = 1.2mA), eliminating need for external pull-up. The MR input includes 63.5kΩ internal pull-up and guarantees reset assertion during low pulse ≥1.5µs, enabling robust manual reset without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.8V ±2.5% over -0°C to +70°C - factory-trimmed for stable 3.3V rail monitoring without calibration. |
| Reset Timeout Period | 1ms (min) - ensures µP reset hold time meets minimum boot requirement of fast microcontrollers. |
| Supply Current | 8µA (typ) at VCC = 5.5V - enables use in battery-powered portable equipment with multi-year runtime. |
| 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 precise external resistor-divider programming of auxiliary voltage monitoring points. |
| Operating Voltage Range | VCC = (2.8V × 1.025) to +5.5V = 2.87V–5.5V - ensures valid operation only when monitored 3.3V rail is within regulation. |
| MR Input Logic Levels | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC - compatible with 3.3V and 5V logic families without level-shifting. |
Pinout & Package
Package: 5-pin SOT23 (U5+1), 2.9mm × 1.6mm footprint, lead-free RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert reset; sources current to deassert - interfaces directly to µP reset pin without pull-up. |
| 2 - GND | System ground reference | Common return path for all internal comparators and output stage; must be low-impedance connection. |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external divided voltage to 1.23V reference; asserts reset if input falls below threshold. |
| 4 - OVRST IN | Adjustable overvoltage reset input | Compares external divided voltage to 1.23V reference; asserts reset if input exceeds threshold. |
| 5 - VCC | Main supply and primary monitor input | Power source and monitored rail; internal trimmed divider sets 2.8V reset point; minimum operating voltage 2.87V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual auxiliary voltage monitoring | RST IN (undervoltage) and OVRST IN (overvoltage) inputs enable independent monitoring of secondary rails like 1.8V or 12V. |
| Factory-trimmed precision threshold | 2.8V VCC reset point with ±2.5% tolerance over temperature - eliminates external resistor network and calibration. |
| Guaranteed RESET validity to VCC = 1V | Push/pull output maintains defined logic levels even during deep brownout - prevents µP latch-up or undefined state. |
| No external components required | Internal 63.5kΩ MR pull-up, 1.23V reference, and trimmed divider eliminate discrete parts - reduces BOM count and PCB area. |
| Transient immunity | Immune to VCC transients <1.4µs at 2.8V overdrive - suppresses noise-induced false resets in electrically noisy environments. |
Applications
| 3.3V Microcontroller Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Ensuring clean boot of ARM Cortex-M4 MCU powered by 3.3V LDO with backup 5V rail. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V rail; RST IN monitors 5V backup; OVRST IN guards against 3.3V overvoltage. Use Value: Prevents firmware corruption during power transitions by holding RESET until both rails stabilize above 2.8V and 4.5V respectively. |
Use Scenario: Protecting digital I/O channels in DIN-rail mounted PLC against supply anomalies. IC Role / Device Role / Timing Role: System-level reset controller with manual override (MR button) and dual-rail fault detection. Use Value: Enables field-serviceable reset without power cycle; detects both under- and overvoltage on isolated 24V I/O supply via OVRST IN. |
| Battery-Powered Medical Sensor Node | Multivoltage FPGA Configuration System |
Use Scenario: Maintaining data integrity in wearable ECG sensor using coin-cell battery and 3.3V buck converter. IC Role / Device Role / Timing Role: Low-current (8µA) supervisor asserting RESET during battery sag below 2.8V; MR used for firmware update trigger. Use Value: Extends usable battery life while guaranteeing safe shutdown before ADC/DAC malfunction due to undervoltage. |
Use Scenario: Coordinating power-up sequence of FPGA core (1.0V), I/O (3.3V), and configuration flash (1.8V). IC Role / Device Role / Timing Role: VCC monitors 3.3V I/O rail; RST IN monitors 1.8V flash supply; OVRST IN watches 1.0V core for overvoltage. Use Value: Prevents partial configuration or bitstream corruption by enforcing strict voltage sequencing and fault detection across three rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK28D3-T | Same 2.8V VCC threshold but 140ms reset timeout vs. 1ms | Suitable for slower µPs or systems requiring longer reset hold time after power stabilization | Select when longer reset assertion is needed; not drop-in for timing-critical fast-boot designs. |
| TPS3808G125DBVR | Fixed 1.25V threshold, no auxiliary inputs, 200ms timeout, 2.5µA ICC | Limited to single-rail monitoring; lower quiescent current but no RST IN/OVRST IN flexibility | Choose for ultra-low-power single-supply apps where dual-input monitoring is unnecessary. |
Compared with MAX6307UK28D1-T, the MAX6307UK28D3-T extends reset hold time for legacy µPs, while TPS3808G125DBVR trades monitoring flexibility for lower ICC and smaller footprint - neither offers identical triple-input functionality or 1ms timing.
Availability
MAX6307UK28D1-T is available at Aetrix Electronics and suitable for portable computers, industrial PLC modules, battery-powered medical sensors, and multivoltage FPGA configuration systems requiring stable component supply and long-term production continuity.
Supply support for MAX6307UK28D1-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 management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6305–MAX6313 family delivers programmable supervisory functions in ultra-small SOT23 packages, targeting space-constrained embedded systems needing multirail voltage monitoring and deterministic reset behavior.
FAQ
What is the exact factory-programmed VCC reset threshold for MAX6307UK28D1-T?
The MAX6307UK28D1-T has a factory-trimmed VCC reset threshold of 2.8V with ±2.5% tolerance over the -0°C to +70°C temperature range. This value is confirmed in Table 1 of the datasheet and applies specifically to the "28" suffix, corresponding to nominal 2.80V. The actual measured threshold falls between 2.73V and 2.87V at room temperature.
Does MAX6307UK28D1-T support manual reset, and how is it implemented?
Yes, MAX6307UK28D1-T includes a manual-reset (MR) input on pin 3. A logic-low pulse ≥1.5µs on MR forces RESET assertion for the full timeout period (1ms min) after MR returns high. An internal 63.5kΩ pull-up resistor allows MR to be left unconnected or tied to VCC when unused, simplifying design and reducing component count.
Can MAX6307UK28D1-T monitor voltages other than VCC, and how?
Yes, MAX6307UK28D1-T monitors two additional voltages via RST IN (pin 3) and OVRST IN (pin 4). Each connects to an external resistor divider that scales the target voltage to match the internal 1.23V reference. For example, to monitor a 5V rail for undervoltage, set R1/R2 ratio so VRST IN falls below 1.23V when VIN drops below the desired threshold.
What is the minimum VCC required for MAX6307UK28D1-T to operate correctly?
MAX6307UK28D1-T requires VCC ≥ 2.87V to operate - calculated as 2.8V × 1.025 (the +2.5% upper limit of its factory-trimmed threshold). Below this, the internal voltage divider cannot reliably compare against the 2.8V setpoint. The device guarantees RESET assertion down to VCC = 1V, but functional supervision begins only above 2.87V.
Is MAX6307UK28D1-T pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, MAX6307UK28D1-T uses the standard SOT23-5 pinout shared across the MAX6305–MAX6313 family. Pin 1 is RESET, pin 2 is GND, pin 3 is RST IN, pin 4 is OVRST IN, and pin 5 is VCC. This allows direct substitution within the same functional variant group (e.g., MAX6307/MAX6310/MAX6313), though reset thresholds and timeouts differ by part number suffix.
MAX6307UK28D1-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:
- 2.8V, 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
MAX6307UK28D1-T FAQ
1.How can I place an order for MAX6307UK28D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK28D1-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 MAX6307UK28D1-T reliable?
The price and inventory of MAX6307UK28D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK28D1-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK28D1-T?
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4.How is shipping managed for MAX6307UK28D1-T?
MAX6307UK28D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK28D1-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 MAX6307UK28D1-T?
For technical support, including MAX6307UK28D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK28D1-T requirements.
6.How does Aetrix verify that MAX6307UK28D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK28D1-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 MAX6307UK28D1-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK28D1-T?
All MAX6307UK28D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK28D1-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 MAX6307UK28D1-T part is unused and in its original packaging.
Return procedure for MAX6307UK28D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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