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Analog Devices Inc./Maxim Integrated MAX6305UK00D1-T
- Part No.:
- MAX6305UK00D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305UK00D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
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Product details
Overview
The MAX6305UK00D1-T from Maxim Integrated is a 5-pin SOT23 programmable reset IC designed to monitor VCC and two adjustable undervoltage inputs (RST IN1/RST IN2) in multivoltage systems. It features a factory-programmed 2.5V reset threshold on VCC, 1ms minimum reset timeout, guaranteed RESET assertion down to VCC = 1V, 8µA supply current, and immunity to fast transients-ideal for portable computers and battery-powered embedded controllers.
For engineers reviewing the MAX6305UK00D1-T datasheet, MAX6305UK00D1-T pinout, MAX6305UK00D1-T application, or MAX6305UK00D1-T equivalent, key selection criteria include its dual adjustable reset inputs, open-drain active-low RESET output, SOT23-5 package compatibility, and support for 3V/5V system supervision without external components.
Technical Context
The MAX6305UK00D1-T implements a CMOS supervisory architecture with three independent reset comparators: one internal factory-trimmed VCC monitor set to 2.5V ±1.5%, and two externally configurable undervoltage inputs (RST IN1/RST IN2) referenced to a precise 1.23V internal bandgap. Its reset generator asserts an open-drain output for ≥1ms after all monitored voltages exceed thresholds.
It operates across VCC = 1.0V to 5.5V, guarantees valid RESET down to VCC = 1V, and rejects transients ≤100ns at full overdrive-enabling reliable operation in noisy, battery-backed, or dynamically switching power environments such as portable instrumentation and industrial microcontroller systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.5V ±1.5% at +25°C; factory-trimmed for stable brownout detection in 3.3V/5V systems |
| Reset Timeout Period | 1ms (minimum); ensures µP initialization completes before release in fast-boot applications |
| Supply Current | 8µA typical at +25°C; enables multi-year battery life in portable equipment |
| Operating VCC Range | 1.0V to 5.5V; supports valid reset assertion during deep brownout down to 1V |
| Input Threshold (RST IN) | 1.23V ±30mV; allows precise external resistor-divider programming of custom reset points |
| RESET Output Type | Active-low, open-drain; interfaces directly with bidirectional µP reset pins using single pull-up |
| Transient Immunity | Rejects <100ns negative-going VCC glitches; eliminates false resets in electrically noisy environments |
Pinout & Package
Package: SOT23-5, surface-mount, lead-free compatible (-T suffix), 5-pin compact footprint (2.9mm × 1.6mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives low to assert system reset; requires external pull-up; compatible with bidirectional µP reset I/O |
| 2 - GND | System ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - RST IN1 | Adjustable undervoltage reset input #1 | Monitors external rail via resistor divider; asserts reset when voltage falls below 1.23V reference |
| 4 - RST IN2 | Adjustable undervoltage reset input #2 | Independent second monitoring channel; enables dual-rail supervision (e.g., 3.3V + 1.8V) |
| 5 - VCC | Main supply and primary monitored rail | Powered from system VCC; internally compared to 2.5V threshold; also powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Factory-programmed 2.5V threshold and 1ms timeout eliminate need for timing capacitors or trim resistors |
| Dual adjustable reset inputs | RST IN1 and RST IN2 support independent monitoring of two auxiliary rails using standard resistor dividers |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for nonvolatile memory write protection |
| Immunity to short VCC transients | Rejects <100ns glitches-prevents spurious resets in motor-driven or switching-power-supply environments |
| Low 8µA quiescent current | Enables always-on supervision in energy-constrained IoT sensors and handheld medical devices |
Applications
| Portable Computers | Intelligent Instruments |
|---|---|
Use Scenario: Supervising 3.3V core and 5V peripheral rails during battery discharge and AC adapter transitions. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to prevent firmware corruption during voltage sag. Use Value: Prevents boot failure by holding µP in reset until both rails stabilize above 2.5V and configured thresholds. |
Use Scenario: Monitoring isolated analog front-end supply and digital controller supply in handheld test equipment. IC Role / Device Role / Timing Role: Independent undervoltage detection on two signal-chain rails using RST IN1/RST IN2. Use Value: Ensures ADC/DAC calibration integrity by resetting system before out-of-spec supply conditions affect measurement accuracy. |
| Embedded Control Systems | Multivoltage Industrial Controllers |
Use Scenario: Power sequencing validation in fanless industrial gateways with 12V input, 5V logic, and 3.3V I/O rails. IC Role / Device Role / Timing Role: Primary VCC monitor (2.5V threshold) plus secondary rail supervision via RST IN1. Use Value: Guarantees safe startup sequence by enforcing minimum hold time before µP release, avoiding race conditions. |
Use Scenario: Supervising 24V fieldbus interface and 5V microcontroller supply in PLC modules. IC Role / Device Role / Timing Role: High-immunity reset generator rejecting EMI-induced transients on long cable runs. Use Value: Eliminates nuisance resets caused by relay switching noise or motor commutation spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6305UK00D3-T | Same 2.5V VCC threshold but 140ms min reset timeout vs. 1ms | Suitable for slower-booting systems requiring longer initialization windows | Select when extended reset hold time improves reliability in complex FPGA or DSP boot sequences |
| TLV803EB25DBZR | Single-input 2.5V reset IC, push-pull output, 35µA ICC, no adjustable inputs | Lacks dual RST IN capability and open-drain flexibility; simpler, lower-cost option | Choose only for basic single-rail supervision where dual monitoring and bidirectional µP interface are unnecessary |
Compared with MAX6305UK00D3-T, the MAX6305UK00D1-T provides faster system release (1ms vs. 140ms), enabling tighter boot timing control; versus TLV803EB25DBZR, it delivers essential dual-rail supervision and open-drain compatibility at higher design complexity cost.
Availability
MAX6305UK00D1-T is available at Aetrix Electronics and suitable for portable computers, intelligent instruments, and embedded control systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6305UK00D1-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 in industrial, computing, and communications markets.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision-delivering factory-programmable thresholds, dual adjustable inputs, and transient-hardened reset generation in ultra-small SOT23 packages.
FAQ
What is the factory-programmed reset threshold for MAX6305UK00D1-T?
The MAX6305UK00D1-T has a factory-programmed VCC reset threshold of 2.5V ±1.5% at +25°C, with temperature coefficient of 40ppm/°C. This value is laser-trimmed during manufacturing and applies specifically to the VCC pin; RST IN1 and RST IN2 remain adjustable via external resistor dividers referencing the internal 1.23V bandgap.
Does MAX6305UK00D1-T support manual reset functionality?
No, the MAX6305UK00D1-T does not include a manual reset (MR) input. MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6305UK00D1-T relies solely on VCC, RST IN1, and RST IN2 for reset assertion-making it suitable for fully automatic supervision without user intervention.
What is the maximum VCC voltage the MAX6305UK00D1-T can tolerate?
The MAX6305UK00D1-T has an absolute maximum VCC rating of +6V, but its specified operating range is 1.0V to 5.5V. Operation above 5.5V risks permanent damage. Within spec, it guarantees valid RESET output down to VCC = 1V and supports stable supervision across 3.3V and 5V systems.
Can MAX6305UK00D1-T monitor a 1.8V rail?
Yes-via RST IN1 or RST IN2. Using a resistor divider, the 1.8V rail can be scaled to fall below the 1.23V comparator threshold when undervoltage occurs. For example, a 1.8V rail with 10% dropout (1.62V) maps to ~1.11V at RST IN, triggering reset. Input leakage (<±25nA) ensures minimal error with megohm-level dividers.
Is the RESET output of MAX6305UK00D1-T compatible with 1.8V logic?
The RESET output is open-drain and voltage-level agnostic: its state depends on the external pull-up voltage. When pulled up to 1.8V, it delivers clean 0V/1.8V signaling compatible with 1.8V µPs. The internal driver sinks ≥50µA at 0.3V, ensuring solid low-level drive even with 1.8V pull-up and PCB trace capacitance.
MAX6305UK00D1-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:
- Adjustable/Selectable
- 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
MAX6305UK00D1-T FAQ
1.How can I place an order for MAX6305UK00D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305UK00D1-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 MAX6305UK00D1-T reliable?
The price and inventory of MAX6305UK00D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305UK00D1-T is usually 5 days.
3.What payment methods are accepted for MAX6305UK00D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305UK00D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305UK00D1-T?
MAX6305UK00D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305UK00D1-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 MAX6305UK00D1-T?
For technical support, including MAX6305UK00D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305UK00D1-T requirements.
6.How does Aetrix verify that MAX6305UK00D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6305UK00D1-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 MAX6305UK00D1-T meets industry standards.
7.What is the process for return or replacement of MAX6305UK00D1-T?
All MAX6305UK00D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305UK00D1-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 MAX6305UK00D1-T part is unused and in its original packaging.
Return procedure for MAX6305UK00D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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