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Analog Devices Inc./Maxim Integrated MAX6305UK00D2+T
- Part No.:
- MAX6305UK00D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305UK00D2+T.pdf
- Description:
- IC PROGRAM ADJ RESET SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:891
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Product details
Overview
MAX6305UK00D2+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 asserts an active-low open-drain RESET output when any monitored supply falls below its factory-set 2.5V threshold, with guaranteed operation down to VCC = 1V, 8µA supply current, and 20ms minimum reset timeout. It is used in portable computers and embedded control systems requiring dual-supply supervision.
For engineers reviewing the MAX6305UK00D2+T datasheet, MAX6305UK00D2+T pinout, MAX6305UK00D2+T application, or MAX6305UK00D2+T equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, factory-trimmed threshold accuracy (±1.5% at +25°C), and validated alternative options for multivoltage reset supervision.
Technical Context
The MAX6305UK00D2+T implements a dual-input undervoltage monitoring architecture: one internal factory-trimmed comparator for VCC (set to 2.5V nominal) and two external resistor-programmable inputs (RST IN1, RST IN2) referenced to a 1.23V internal bandgap. It features an open-drain RESET output with guaranteed logic-level validity down to VCC = 1V and immunity to transients up to 10µs at 100mV overdrive.
Its reset timeout is factory-programmed to 20ms (min), and it operates across 0°C to +70°C with no external components required. The device ignores fast VCC transients by design and maintains guaranteed performance over temperature via ±40ppm/°C reset threshold drift and ±2.5% total accuracy over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.5V nominal, factory-trimmed ±1.5% at +25°C; enables precise brownout detection for 3.3V/5V systems |
| Reset Timeout Period | 20ms minimum; ensures µP reset pulse meets minimum assertion time for reliable boot initialization |
| Supply Current | 8µA typical at +25°C; supports battery-powered operation with minimal quiescent drain |
| Operating Voltage Range | 1.0V to 5.5V; guarantees RESET assertion validity even during deep brownout conditions |
| Input Threshold (RST IN) | 1.23V ±0.03V; stable internal reference enabling accurate external voltage divider programming |
| Reset Output Type | Active-low open-drain; allows wired-OR configuration and interface with bidirectional µP reset pins |
| Temperature Range | 0°C to +70°C; qualified for commercial-grade embedded and portable computing applications |
Pinout & Package
MAX6305UK00D2+T is housed in a lead-free 5-pin SOT23 package (package code U5+1, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is marked with a dot; pin numbering follows standard SOT23 top-view convention.
| 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 | Return path for all internal comparators and output stage; must be low-impedance for noise immunity |
| 3 - RST IN1 | Adjustable undervoltage reset input | Monitors external supply via resistor divider; asserts reset when input falls below 1.23V reference |
| 4 - RST IN2 | Second adjustable undervoltage reset input | Independent monitoring channel for dual-rail systems; same 1.23V threshold and ±25nA leakage as RST IN1 |
| 5 - VCC | Main power supply input | Supplies internal circuitry and is monitored by factory-trimmed 2.5V threshold comparator |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent undervoltage inputs | RST IN1 and RST IN2 enable simultaneous monitoring of two separate rails (e.g., 3.3V and 5V) without shared dividers |
| Factory-trimmed 2.5V VCC threshold | Eliminates external resistor networks for primary supply monitoring-reduces BOM count and layout area |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset assertion during severe brownout, preventing µP lockup before power collapse |
| Immunity to short VCC transients | Rejects glitches ≤10µs wide at 100mV overdrive-avoids spurious resets in noisy switching environments |
| No external components required | Full functionality achieved with only optional pull-up on RESET and bypass capacitor-ideal for space-constrained PCBs |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Supervising both 3.3V core and 5V I/O rails during battery discharge and AC adapter transitions. IC Role / Device Role / Timing Role: Dual-rail voltage supervisor asserting open-drain RESET to x86 or ARM host processor during brownout. Use Value: Prevents corrupted firmware execution by guaranteeing 20ms minimum reset pulse while consuming only 8µA idle current. |
Use Scenario: Monitoring auxiliary 12V sensor supply and main 5V controller rail in industrial PLC modules. IC Role / Device Role / Timing Role: Independent undervoltage detector for redundant power paths, interfacing with FPGA reset controller. Use Value: Enables fail-safe shutdown via RST IN1/RST IN2 inputs without adding discrete comparators or voltage references. |
| Intelligent Instruments | Multivoltage Systems (3V/5V) |
Use Scenario: Ensuring clean startup of ADC, DAC, and microcontroller in handheld test equipment powered by Li-ion battery. IC Role / Device Role / Timing Role: Primary reset generator with VCC monitoring and secondary rail supervision via RST IN1. Use Value: Maintains guaranteed RESET assertion down to 1V VCC, supporting graceful shutdown as battery drops below 3.0V. |
Use Scenario: Coordinating power sequencing between 3.3V logic and 5V analog sections in mixed-signal data acquisition boards. IC Role / Device Role / Timing Role: Simultaneous VCC (2.5V threshold) and RST IN1 (programmed for 3.3V) supervision with single-device coordination. Use Value: Eliminates need for two separate supervisors-reduces cost, board area, and interconnect complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multivoltage reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D2+T | Single VCC monitor (2.5V threshold) plus one RST IN input and manual-reset (MR) pin; push/pull RESET output | Lacks second RST IN input; adds MR functionality-suited for designs needing operator-initiated reset | Select when manual reset capability is required and dual-rail monitoring is not needed |
| TPS3808G125DBVR | Fixed 1.25V threshold, 20ms timeout, 1.8–6V VCC range, push/pull output; no secondary RST inputs | Designed for single-rail low-voltage systems (e.g., 1.8V/2.5V); lacks dual-input flexibility and open-drain compatibility | Choose for cost-sensitive, single-supply applications where open-drain interface is unnecessary |
Compared with MAX6305UK00D2+T, MAX6306UK25D2+T adds manual reset but removes one RST IN channel, while TPS3808G125DBVR offers lower voltage support but sacrifices multirail supervision and open-drain interoperability-making MAX6305UK00D2+T uniquely suited for dual-rail portable systems requiring minimal quiescent current and flexible reset signaling.
Availability
MAX6305UK00D2+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6305UK00D2+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 engineered specifically for multivoltage microprocessor supervision in space- and power-constrained systems, emphasizing precision threshold accuracy, ultra-low quiescent current, and transient-immune reset generation.
FAQ
What is the factory-set reset threshold voltage for MAX6305UK00D2+T?
The MAX6305UK00D2+T has a factory-set VCC reset threshold of 2.5V nominal, with ±1.5% tolerance at +25°C and ±2.5% over the full 0°C to +70°C operating range. This value is laser-trimmed during production and cannot be adjusted externally-ensuring consistent brownout detection without calibration overhead in the MAX6305UK00D2+T design.
Does MAX6305UK00D2+T support manual reset functionality?
No, MAX6305UK00D2+T does not include a manual-reset (MR) input. It belongs to the MAX6305/MAX6308/MAX6311 subgroup, which features two adjustable RST IN inputs but no MR pin. For manual reset capability, consider MAX6306UK25D2+T or MAX6309UK25D2+T-both share the same 2.5V threshold and 20ms timeout but add the MR function.
What is the purpose of the RST IN1 and RST IN2 pins on MAX6305UK00D2+T?
RST IN1 and RST IN2 are independent undervoltage comparator inputs on MAX6305UK00D2+T, each referenced to a stable 1.23V internal bandgap. They allow external resistor dividers to program custom reset thresholds for secondary supplies (e.g., 3.3V or 12V rails), enabling true dual- or triple-rail supervision without additional ICs-critical for compact multivoltage systems using MAX6305UK00D2+T.
Can MAX6305UK00D2+T operate reliably below 2.5V VCC?
Yes, MAX6305UK00D2+T guarantees valid RESET assertion down to VCC = 1.0V, per its Electrical Characteristics table. Below 1.5V, it enters undervoltage lockout mode; between 1.5V and 2.5V, it transitions to normal operation. This behavior ensures deterministic reset signaling during deep brownout-unlike many supervisors that cease functioning near 2.0V, making MAX6305UK00D2+T especially robust for battery-backed applications.
What package type and RoHS status does MAX6305UK00D2+T use?
MAX6305UK00D2+T is supplied in a lead-free 5-pin SOT23 package (U5+1 outline), compliant with RoHS Directive 2011/65/EU. The "+T" suffix explicitly denotes lead-free termination; the device uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing standard reflow without baking.
MAX6305UK00D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Strip
- Product Status:
- Active
- 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:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6305UK00D2+T FAQ
1.How can I place an order for MAX6305UK00D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305UK00D2+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 MAX6305UK00D2+T reliable?
The price and inventory of MAX6305UK00D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305UK00D2+T is usually 5 days.
3.What payment methods are accepted for MAX6305UK00D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305UK00D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305UK00D2+T?
MAX6305UK00D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305UK00D2+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 MAX6305UK00D2+T?
For technical support, including MAX6305UK00D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305UK00D2+T requirements.
6.How does Aetrix verify that MAX6305UK00D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6305UK00D2+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 MAX6305UK00D2+T meets industry standards.
7.What is the process for return or replacement of MAX6305UK00D2+T?
All MAX6305UK00D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305UK00D2+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 MAX6305UK00D2+T part is unused and in its original packaging.
Return procedure for MAX6305UK00D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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