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Analog Devices Inc./Maxim Integrated MAX6307UK28D2-T
- Part No.:
- MAX6307UK28D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK28D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
MAX6307UK28D2-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 2.8V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert an active-low open-drain RESET output. It features 20ms 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 MAX6307UK28D2-T datasheet, MAX6307UK28D2-T pinout, MAX6307UK28D2-T application, or MAX6307UK28D2-T equivalent, key selection criteria include its dual-input monitoring capability (VCC + RST IN + OVRST IN), factory-trimmed 2.8V threshold with ±2.5% tolerance over temperature, SOT23-5 package compatibility, and immunity to fast VCC transients up to 100V/µs.
Technical Context
The MAX6307UK28D2-T implements a triple-input supervision 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 20ms minimum timeout.
Its open-drain RESET output sinks ≥3.2mA at VCC > 4.25V and remains valid down to VCC = 1V; it ignores negative-going VCC transients ≤100ns at 2.8V overdrive, and supports manual reset assertion via MR pin with internal 63.5kΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.8V nominal, ±2.5% over -0°C to +70°C - ensures reliable detection of 3.3V rail brownout before system instability |
| Reset Timeout Period | 20ms minimum - provides sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 8µA typical at +25°C - enables use in battery-powered portable equipment with multi-year standby life |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface with bidirectional µP reset pins |
| Input Voltage Range | VCC = 2.828V to +5.5V - supports operation across 3.3V systems while monitoring 2.8V threshold |
| MR Input Logic | TTL/CMOS-compatible with 63.5kΩ internal pull-up - eliminates need for external components in manual reset implementation |
| RST IN / OVRST IN Threshold | 1.23V reference with ±25nA leakage - enables high-impedance resistor-divider programming for auxiliary voltage monitoring |
Pinout & Package
MAX6307UK28D2-T is housed in a RoHS-compliant 5-pin SOT23 package (outline U5+1), footprint-compatible with industry-standard 5-lead SC-70/SOT-23 layouts and suitable for high-density PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Sinks ≥3.2mA at VCC > 4.25V; requires external pull-up; asserts during VCC/RST IN/OVRST IN fault or MR low |
| 2 - GND | System ground reference | Return path for all internal comparators and reset generator; must be low-impedance connection |
| 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 (via resistor divider) to 1.23V reference; asserts reset if input exceeds threshold |
| 5 - VCC | Main supply and primary monitored rail | Powered from 3.3V system rail; internally monitored against 2.8V factory-trimmed threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring inputs | VCC (2.8V), RST IN (programmable undervoltage), OVRST IN (programmable overvoltage) - enables comprehensive rail supervision in mixed-voltage systems |
| Factory-trimmed precision threshold | 2.8V ±2.5% over full temperature range - eliminates calibration overhead and improves BOM consistency |
| Transient-immune supervision | Immunity to VCC glitches <100ns at 2.8V overdrive - prevents spurious resets in electrically noisy environments |
| No external timing components | 20ms factory-programmed timeout - reduces component count and layout area versus RC-based solutions |
| Guaranteed operation down to VCC = 1V | RESET remains valid logic-low until VCC drops below 1V - ensures deterministic behavior during deep brownout |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Supervises 3.3V main rail and 5V analog front-end in compact, battery-backed diagnostic devices subject to ESD and load-dump transients. IC Role / Device Role / Timing Role: Triple-input supervisor asserting open-drain RESET to ARM Cortex-M microcontroller during VCC dip, sensor rail overvoltage, or manual recalibration trigger. Use Value: Prevents firmware corruption by ensuring processor reset occurs within 20ms of any monitored rail violation, even under 100V/µs transients. |
Use Scenario: Monitors dual rails (3.3V logic, 5V display backlight) in handheld vital-sign analyzers with strict battery-life requirements. IC Role / Device Role / Timing Role: Primary power-on and brownout detector with manual-reset support for field service; uses RST IN to supervise backup battery voltage. Use Value: 8µA quiescent current extends single-charge battery life beyond 5 years in sleep mode while maintaining full reset integrity. |
| Automotive Body Control Units | Point-of-Sale Terminal Power Management |
Use Scenario: Embedded in 12V-to-3.3V DC-DC subsystems for interior lighting controllers exposed to automotive load-dump pulses. IC Role / Device Role / Timing Role: VCC supervisor (2.8V threshold) plus OVRST IN monitoring switched 12V line to detect alternator overvoltage events. Use Value: Dual-threshold detection enables differentiated response: brownout → soft reset; overvoltage → immediate shutdown sequence initiation. |
Use Scenario: Ensures clean boot and recovery in retail terminals powered from unregulated wall adapters with poor line regulation. IC Role / Device Role / Timing Role: Resets application processor and secure element simultaneously upon 3.3V rail collapse or tamper-triggered MR signal. Use Value: 20ms timeout aligns with NAND flash controller power-up sequencing requirements, preventing boot-loader corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK29D2-T | 2.9V factory reset threshold (vs. 2.8V); otherwise identical pinout, timing, and feature set | Suitable where tighter margin above 2.85V nominal 3.3V rail is required to avoid nuisance resets | Select when system VCC tolerance demands higher trip point; no PCB changes needed |
| TPS3808G18DBVR | Push-pull RESET output; 1.8V fixed VDD threshold; no OVRST IN; 20ms timeout | Lacks overvoltage monitoring and adjustable inputs; designed for single-rail 1.8V/3.3V systems only | Choose for cost-sensitive single-supply apps without overvoltage protection requirement |
Compared with MAX6307UK28D2-T, MAX6307UK29D2-T offers a 100mV higher reset threshold for improved noise margin on nominal 3.3V rails, while TPS3808G18DBVR trades triple-input flexibility for lower cost and push-pull drive in simpler single-rail applications.
Availability
MAX6307UK28D2-T is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, automotive body electronics, and point-of-sale terminals requiring stable component supply across extended product lifecycles.
Supply support for MAX6307UK28D2-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed to provide highly configurable, low-power supervisory solutions for multivoltage embedded systems where simultaneous monitoring of primary and auxiliary rails is critical.
FAQ
What is the factory-programmed reset threshold voltage for MAX6307UK28D2-T?
The MAX6307UK28D2-T has a factory-programmed VCC reset threshold of 2.8V nominal, with ±2.5% tolerance over the operating temperature range of -0°C to +70°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under VTH for MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 variants. The "28" in the part number directly encodes this 2.8V threshold.
Does MAX6307UK28D2-T support overvoltage detection on external rails?
Yes, MAX6307UK28D2-T supports overvoltage detection via its OVRST IN pin (Pin 4). When an external resistor divider applies a voltage exceeding the internal 1.23V reference to OVRST IN, the device asserts RESET. This enables monitoring of secondary rails such as 5V, 12V, or battery voltages for overvoltage faults - a capability not present in basic single-threshold supervisors.
What is the reset timeout period configured for MAX6307UK28D2-T?
The "D2" suffix in MAX6307UK28D2-T specifies a factory-programmed reset timeout period of 20ms minimum. This value is guaranteed across temperature and supply voltage variations and is implemented using an internal oscillator - no external capacitor or resistor is required. The timeout begins after all monitored inputs return to valid levels and holds RESET asserted for the full duration.
Can MAX6307UK28D2-T operate with a 3.3V supply while monitoring a 2.8V threshold?
Yes, MAX6307UK28D2-T is fully compatible with 3.3V VCC operation while monitoring against its 2.8V factory-set threshold. Its VCC operating range is (VTH + 2.5%) to +5.5V, so with VTH = 2.8V, minimum VCC is 2.87V - well within standard 3.3V ±10% tolerance. The device remains functional and guarantees RESET validity down to VCC = 1V.
Is the MR (manual reset) input on MAX6307UK28D2-T internally pulled up?
Yes, the MR input (Pin 3) on MAX6307UK28D2-T includes an internal 63.5kΩ pull-up resistor to VCC. This allows the pin to be left floating or tied directly to VCC when manual reset functionality is unused. When actively driven, MR accepts TTL- or CMOS-level logic low signals to initiate a reset, with a minimum pulse width of 1.5µs over temperature.
MAX6307UK28D2-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:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK28D2-T FAQ
1.How can I place an order for MAX6307UK28D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK28D2-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 MAX6307UK28D2-T reliable?
The price and inventory of MAX6307UK28D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK28D2-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK28D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK28D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK28D2-T?
MAX6307UK28D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK28D2-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 MAX6307UK28D2-T?
For technical support, including MAX6307UK28D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK28D2-T requirements.
6.How does Aetrix verify that MAX6307UK28D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK28D2-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 MAX6307UK28D2-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK28D2-T?
All MAX6307UK28D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK28D2-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 MAX6307UK28D2-T part is unused and in its original packaging.
Return procedure for MAX6307UK28D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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