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Analog Devices Inc./Maxim Integrated MAX6305EUK00D3+T
- Part No.:
- MAX6305EUK00D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305EUK00D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,590
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Product details
Overview
MAX6305EUK00D3+T from Maxim Integrated is a precision 5-pin SOT23 programmable reset IC designed for multivoltage system supervision, monitoring VCC and two adjustable undervoltage inputs (RST IN1/RST IN2) with factory-set 2.5V reset threshold and 140ms minimum reset timeout. It features 8µA supply current, guaranteed RESET validity down to VCC = 1V, and immunity to fast transients-ideal for portable computers and embedded control systems requiring reliable power-on reset.
For engineers reviewing the MAX6305EUK00D3+T datasheet, MAX6305EUK00D3+T pinout, MAX6305EUK00D3+T application, or MAX6305EUK00D3+T equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative options for multivoltage supervisory design in industrial and battery-powered equipment.
Technical Context
The MAX6305EUK00D3+T implements dual adjustable undervoltage comparators (RST IN1/RST IN2) referenced to a stable 1.23V internal bandgap, enabling independent monitoring of two external rails via resistor dividers. Its open-drain active-low RESET output ensures compatibility with bidirectional µP reset pins and supports pull-up to any logic rail.
It operates across -40°C to +85°C with ±2.5% reset threshold accuracy over temperature, 40ppm/°C drift, and guarantees functional reset assertion even as VCC falls to 1.0V-critical for brownout detection in low-voltage portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.0V to 5.5V - enables operation during deep brownout and full-system power-up sequencing |
| Reset Threshold | 2.5V ±2.5% - factory-trimmed for precise 3.3V/5V system monitoring without external calibration |
| Reset Timeout | 140ms (min) - ensures sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 8µA (typ) at +25°C - minimizes quiescent drain in battery-backed or energy-sensitive applications |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface with bidirectional µP reset I/O |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
| Input Leakage | ±25nA max on RST IN1/RST IN2 - permits high-impedance resistor dividers (e.g., 1MΩ/1.6MΩ) with <25mV error |
Pinout & Package
MAX6305EUK00D3+T is housed in a lead-free 5-pin SOT23 package (outline U5+1), footprint-compatible with industry-standard 5-lead SOT-23 layouts and suitable for high-density PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during reset; requires external pull-up; sinks current only - interfaces directly with µP reset pins |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance connection |
| 3 - RST IN1 | Adjustable undervoltage comparator input | Monitors external rail via resistor divider; asserts reset when voltage falls below 1.23V reference |
| 4 - RST IN2 | Second adjustable undervoltage comparator input | Independent monitoring channel for dual-rail systems (e.g., 3.3V + 1.8V); same 1.23V threshold reference |
| 5 - VCC | Primary supply and monitored rail | Power source and primary supervision target; device remains functional down to 1.0V VCC |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs | RST IN1 and RST IN2 support independent monitoring of two external supplies using resistor dividers |
| Factory-programmed 2.5V threshold | Eliminates need for external resistors or trimming when supervising standard 3.3V or 5V rails |
| 140ms minimum reset timeout | Ensures µP completes internal boot sequence before release; avoids premature execution errors |
| Transient immunity | Rejects negative-going VCC glitches ≤100ns at 2.5V overdrive - prevents false resets in noisy environments |
| Low 8µA supply current | Extends battery life in portable instruments and enables always-on supervision in standby modes |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Supervising both 3.3V core and 5V peripheral rails during cold start and dynamic load switching. IC Role / Device Role / Timing Role: Dual-input reset supervisor asserting active-low RESET until both rails stabilize above 2.5V with 140ms hold time. Use Value: Prevents CPU lockup by guaranteeing synchronized reset release across multiple voltage domains. |
Use Scenario: Monitoring backup battery voltage and main DC input in programmable logic controllers. IC Role / Device Role / Timing Role: RST IN1 monitors 3.3V logic rail; RST IN2 monitors 12V field bus - triggers reset on either fault. Use Value: Enables fail-safe shutdown without additional comparators or microcontroller polling overhead. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Ensuring clean boot of ADC/DAC subsystems after Li-ion battery voltage recovery from deep discharge. IC Role / Device Role / Timing Role: VCC-supervised reset with 140ms timeout, while RST IN1 tracks analog supply stability. Use Value: Eliminates measurement corruption caused by partial power-up of mixed-signal circuitry. |
Use Scenario: Maintaining system integrity during USB-to-battery switchover in handheld test meters. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 3.3V logic rail; asserts during VCC dip below 2.5V. Use Value: Achieves 8µA quiescent current and valid reset signaling down to 1.0V VCC - critical for low-battery operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multivoltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6305EUK01D3+T | Factory-set 2.6V reset threshold (vs. 2.5V); otherwise identical pinout, timing, and specs | Suitable where tighter margin above 3.3V rail nominal is required (e.g., systems with higher VCC tolerance) | Select when 2.5V threshold causes premature reset assertion due to VCC ripple or tolerance stack-up |
| TPS3808G125DBVR | Fixed 1.25V threshold, push-pull output, 200ms timeout; no dual adjustable inputs | Limited to single-rail supervision; lacks RST IN1/RST IN2 flexibility for multivoltage designs | Choose only for cost-sensitive single-supply applications where dual-input capability is unnecessary |
Compared with MAX6305EUK00D3+T, MAX6305EUK01D3+T offers a 100mV higher threshold for improved noise margin on 3.3V rails, while TPS3808G125DBVR sacrifices dual-input flexibility for lower cost and push-pull drive-but cannot replace MAX6305EUK00D3+T in systems requiring independent monitoring of two rails.
Availability
MAX6305EUK00D3+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, intelligent instruments, and portable/battery-powered equipment requiring stable component supply across industrial temperature ranges.
Supply support for MAX6305EUK00D3+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.
MAX6305EUK00D3+T belongs to the MAX6305–MAX6313 family of programmable reset supervisors engineered specifically for multivoltage system reliability-supporting dual-rail monitoring, factory-trimmed thresholds, and ultra-low-power operation in portable and embedded platforms.
FAQ
What is the exact reset threshold voltage for MAX6305EUK00D3+T?
The MAX6305EUK00D3+T has a factory-programmed VCC reset threshold of 2.5V with ±2.5% accuracy over the full -40°C to +85°C operating range. This value is trimmed during manufacturing and does not require external components. The threshold applies to the VCC pin; RST IN1 and RST IN2 use an internal 1.23V reference for adjustable rail monitoring.
Does MAX6305EUK00D3+T support manual reset functionality?
No, MAX6305EUK00D3+T does not include a manual reset (MR) input. It belongs to the MAX6305/MAX6308/MAX6311 subgroup, which features dual adjustable undervoltage inputs (RST IN1/RST IN2) but omits MR. For manual reset capability, consider MAX6306EUK00D3+T or MAX6309EUK00D3+T instead.
What is the function of pins 3 and 4 on MAX6305EUK00D3+T?
Pins 3 and 4 on MAX6305EUK00D3+T are RST IN1 and RST IN2 - independent adjustable undervoltage comparator inputs. Each compares an external voltage (set via resistor divider) against the internal 1.23V reference. A drop below this threshold on either pin asserts the open-drain RESET output, enabling flexible supervision of two separate power rails.
Can MAX6305EUK00D3+T monitor overvoltage conditions?
No, MAX6305EUK00D3+T does not support overvoltage monitoring. It provides only undervoltage detection on VCC, RST IN1, and RST IN2. For overvoltage capability, select MAX6307EUK00D3+T or MAX6313EUK00D3+T, which include the OVRST IN pin and associated comparator circuitry.
What is the minimum VCC voltage at which MAX6305EUK00D3+T guarantees valid RESET output?
MAX6305EUK00D3+T guarantees valid RESET output down to VCC = 1.0V. Below this level, the open-drain output's sinking capability degrades significantly. For applications requiring reset assertion down to 0V, an external pull-down resistor (e.g., 100kΩ) between RESET and GND is recommended to maintain logic-low state.
MAX6305EUK00D3+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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6305EUK00D3+T FAQ
1.How can I place an order for MAX6305EUK00D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305EUK00D3+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 MAX6305EUK00D3+T reliable?
The price and inventory of MAX6305EUK00D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305EUK00D3+T is usually 5 days.
3.What payment methods are accepted for MAX6305EUK00D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305EUK00D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305EUK00D3+T?
MAX6305EUK00D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305EUK00D3+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 MAX6305EUK00D3+T?
For technical support, including MAX6305EUK00D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305EUK00D3+T requirements.
6.How does Aetrix verify that MAX6305EUK00D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6305EUK00D3+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 MAX6305EUK00D3+T meets industry standards.
7.What is the process for return or replacement of MAX6305EUK00D3+T?
All MAX6305EUK00D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305EUK00D3+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 MAX6305EUK00D3+T part is unused and in its original packaging.
Return procedure for MAX6305EUK00D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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