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Analog Devices Inc./Maxim Integrated MAX6305UK00D4-T
- Part No.:
- MAX6305UK00D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305UK00D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,147
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Product details
Overview
The MAX6305UK00D4-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, 1120ms minimum reset timeout, 8µA supply current, and guaranteed RESET assertion down to VCC = 1V. It is used in portable computers and embedded control systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6305UK00D4-T datasheet, MAX6305UK00D4-T pinout, MAX6305UK00D4-T application, or MAX6305UK00D4-T equivalent, key selection considerations include its dual-input undervoltage monitoring capability, factory-set 2.5V VCC threshold, 1120ms timeout, open-drain active-low RESET output, and SOT23-5 package compatibility with space-constrained designs.
Technical Context
The MAX6305UK00D4-T implements a CMOS supervisory architecture with independent comparators for RST IN1 and RST IN2 referenced to a 1.23V internal bandgap. It does not monitor VCC via internal divider (unlike MAX6306/MAX6307 variants); instead, it relies solely on external resistor dividers on RST IN1/RST IN2 for all voltage supervision. Its reset generator asserts an open-drain low-active signal after a fixed 1120ms timeout following valid input recovery.
This device operates across 0°C to +70°C, supports VCC from 2.5V to 5.5V, and guarantees functional reset behavior down to VCC = 1V. Its ±25nA input leakage enables megohm-level external resistor networks, and its design inherently rejects fast transients on monitored inputs per typical operating characteristics data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.5V to 5.5V - supports standard 3.3V and 5V system rails without external regulation |
| Reset Threshold | 2.5V nominal on VCC - factory-trimmed with ±1.5% tolerance at +25°C, enabling precise power-fail detection |
| Reset Timeout | 1120ms minimum - ensures µP initialization completes before release of reset signal |
| Supply Current | 8µA typical - enables battery-powered operation with minimal quiescent drain |
| RESET Output | Open-drain, active-low - allows wired-OR configuration and interface with bidirectional µP reset pins |
| Operating Temp | 0°C to +70°C - suitable for commercial-grade computing and industrial control environments |
| Input Leakage | ±25nA max - permits high-impedance external resistor dividers without threshold error accumulation |
Pinout & Package
SOT23-5 package: ultra-compact surface-mount outline (2.9mm × 1.6mm × 1.1mm), lead-free compatible, tape-and-reel delivery only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Drives low during reset assertion; requires external pull-up for logic-high state; interfaces directly with µP reset I/O |
| 2 - GND | System ground reference | Common return path for all internal comparators and reset generator; must be low-impedance |
| 3 - RST IN1 | Adjustable undervoltage reset input | Compares external divided voltage to 1.23V reference; asserts reset when input falls below threshold |
| 4 - RST IN2 | Second adjustable undervoltage reset input | Independent comparator identical to RST IN1; enables dual-rail monitoring (e.g., 3.3V + 5V) |
| 5 - VCC | Primary supply input | Power source for internal circuitry; also monitored at fixed 2.5V threshold; minimum functional VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent undervoltage inputs | Enables simultaneous monitoring of two distinct supply rails using separate resistor dividers |
| Factory-set 2.5V VCC threshold | Eliminates need for external trimming components while ensuring tight ±1.5% accuracy at room temperature |
| 1120ms minimum reset timeout | Guarantees sufficient hold time for slow-starting processors and peripheral initialization sequences |
| 8µA supply current | Reduces standby power in battery-backed systems; extends operational life without compromising supervision fidelity |
| Transient-immune comparator design | Rejects sub-microsecond glitches on RST IN1/RST IN2, preventing spurious resets in noisy environments |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Monitoring 3.3V core and 5V I/O rails during boot and runtime in clamshell notebooks. IC Role / Device Role / Timing Role: Dual-input supervisor asserting synchronized reset if either rail drops below programmed thresholds. Use Value: Prevents firmware corruption by ensuring CPU and peripherals initialize only after both supplies stabilize. | Use Scenario: Supervising auxiliary 3.3V sensor bus and main 5V controller supply in HVAC controllers. IC Role / Device Role / Timing Role: Independent voltage monitoring with 1120ms timeout to coordinate safe restart after brownout. Use Value: Eliminates need for discrete comparators and timers, reducing BOM count and PCB area by >40%. |
| Intelligent Instruments | Multivoltage Systems |
Use Scenario: Ensuring clean startup of FPGA-based data acquisition modules powered by 2.5V, 3.3V, and 1.8V rails. IC Role / Device Role / Timing Role: Configured with RST IN1 monitoring 3.3V and RST IN2 monitoring 2.5V; VCC tied to 3.3V rail. Use Value: Guarantees FPGA configuration begins only after all critical supplies meet timing and voltage margins. | Use Scenario: Power sequencing validation in industrial PLC backplanes supporting 5V/24V mixed-signal subsystems. IC Role / Device Role / Timing Role: RST IN1 monitors 5V logic rail; RST IN2 monitors isolated 24V field power; VCC = 5V. Use Value: Detects undervoltage on either domain and holds system in reset until both recover, preventing latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D4-T | Monitors VCC only (no RST IN1/RST IN2); 2.5V factory threshold; same 1120ms timeout and SOT23-5 package | Lacks dual external input capability; suited for single-rail systems where only VCC supervision is required | Select when only VCC monitoring is needed and board layout lacks space for external resistor dividers |
| TLV809E25DBZR | Single-input, 2.5V reset IC; 350ms timeout; SOT23-3 package; 1.6µA supply current; no manual reset or adjustable inputs | No dual-input support or configurable timeout; lower quiescent current but reduced supervision flexibility | Choose for ultra-low-power single-supply applications where extended timeout and multi-rail monitoring are unnecessary |
Compared with MAX6306UK25D4-T and TLV809E25DBZR, the MAX6305UK00D4-T uniquely provides dual adjustable undervoltage inputs in the same compact SOT23-5 footprint, making it the only option among the three capable of coordinating reset across two independent supply domains without external logic.
Availability
MAX6305UK00D4-T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply and long-term production continuity.
Supply support for MAX6305UK00D4-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.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained, battery-sensitive systems requiring robust transient immunity and factory-programmed accuracy.
FAQ
What is the factory-programmed reset threshold for MAX6305UK00D4-T?
The MAX6305UK00D4-T has a factory-programmed VCC reset threshold of 2.5V, with ±1.5% tolerance at +25°C and ±2.5% over the full 0°C to +70°C operating range. This threshold applies only to the VCC pin; RST IN1 and RST IN2 require external resistor dividers to set their respective trip points relative to the internal 1.23V reference. The "UK00" suffix explicitly denotes the 2.5V nominal threshold per Maxim's ordering convention.
Does MAX6305UK00D4-T support manual reset functionality?
No, the MAX6305UK00D4-T does not include a manual reset (MR) input. It belongs to the MAX6305/MAX6308/MAX6311 subgroup, which features dual adjustable RST IN1/RST IN2 inputs but omits MR and OVRST IN pins. Manual reset capability is present only in MAX6306/MAX6309/MAX6312 and MAX6307/MAX6310/MAX6313 variants. For designs requiring operator-initiated reset, MAX6306UK25D4-T is a functionally close alternative with identical threshold and timeout.
What is the purpose of the 1120ms reset timeout in MAX6305UK00D4-T?
The 1120ms minimum reset timeout in MAX6305UK00D4-T ensures the RESET signal remains asserted long enough for microprocessors, FPGAs, and complex peripherals to complete power-up initialization sequences reliably. This fixed delay begins only after all monitored inputs (VCC, RST IN1, RST IN2) exceed their respective thresholds and prevents premature release of reset during marginal supply conditions. The "D4" suffix in MAX6305UK00D4-T explicitly specifies this 1120ms timeout variant per Maxim's part numbering scheme.
Can MAX6305UK00D4-T monitor overvoltage conditions?
No, the MAX6305UK00D4-T cannot monitor overvoltage. It is configured exclusively for undervoltage detection on VCC, RST IN1, and RST IN2. Overvoltage supervision requires the MAX6307/MAX6310/MAX6313 variants, which include the OVRST IN pin and associated comparator. The MAX6305UK00D4-T pinout lacks OVRST IN, and its internal architecture contains no overvoltage comparator circuitry. For combined under/overvoltage monitoring, MAX6307UK46D4-T (with 4.6V VCC threshold and OVRST IN) is a validated alternative.
What package type and RoHS status does MAX6305UK00D4-T use?
The MAX6305UK00D4-T is supplied in a 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm. It is lead-free compliant, indicated by the "-T" suffix per Maxim's ordering nomenclature. Lead-free packaging meets RoHS Directive 2011/65/EU requirements and is compatible with standard reflow soldering profiles up to +260°C. Tape-and-reel delivery is standard; no tray or tube options are available.
MAX6305UK00D4-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:
- 1.12s Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6305UK00D4-T FAQ
1.How can I place an order for MAX6305UK00D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305UK00D4-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 MAX6305UK00D4-T reliable?
The price and inventory of MAX6305UK00D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305UK00D4-T is usually 5 days.
3.What payment methods are accepted for MAX6305UK00D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305UK00D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305UK00D4-T?
MAX6305UK00D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305UK00D4-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 MAX6305UK00D4-T?
For technical support, including MAX6305UK00D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305UK00D4-T requirements.
6.How does Aetrix verify that MAX6305UK00D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6305UK00D4-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 MAX6305UK00D4-T meets industry standards.
7.What is the process for return or replacement of MAX6305UK00D4-T?
All MAX6305UK00D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305UK00D4-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 MAX6305UK00D4-T part is unused and in its original packaging.
Return procedure for MAX6305UK00D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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