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Analog Devices Inc./Maxim Integrated MAX6308UK00D3-T
- Part No.:
- MAX6308UK00D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6308UK00D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
MAX6308UK00D3-T from Maxim Integrated is a 5-pin SOT23 programmable reset IC designed to monitor dual undervoltage supplies (RST IN1/RST IN2) and assert an active-low push/pull RESET output when either falls below the internal 1.23V reference threshold. It features a factory-programmed 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in portable computers and multivoltage embedded systems for reliable power-on and brownout reset control.
For engineers reviewing the MAX6308UK00D3-T datasheet, MAX6308UK00D3-T pinout, MAX6308UK00D3-T application, or MAX6308UK00D3-T equivalent, key selection criteria include its dual adjustable input architecture, push/pull output drive capability, 140ms timeout period, immunity to fast VCC transients, and operation across 0°C to +70°C industrial temperature range.
Technical Context
The MAX6308UK00D3-T implements two independent undervoltage comparators referenced to a precision 1.23V internal bandgap, enabling flexible monitoring of two separate rails via external resistor dividers. Its push/pull RESET output actively drives both high and low states without requiring an external pull-up resistor.
It uses a monolithic timer circuit to guarantee a minimum 140ms reset assertion after all monitored inputs return above threshold, with propagation delay stable over temperature. The device ignores transients shorter than ~200µs at full overdrive, per typical operating characteristics graphs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | +2.5V to +5.5V - supports direct connection to common logic rails without level-shifting. |
| Supply Current | 8µA (typ) - enables battery-powered operation with minimal quiescent drain. |
| Reset Threshold | 1.23V (ref) - fixed internal comparator reference used with external dividers to set custom trip points. |
| Reset Timeout | 140ms (min) - ensures µP initialization completes before release, preventing premature execution. |
| RESET Output Type | Active-low push/pull - sinks and sources current; eliminates need for external pull-up resistor. |
| Operating Temp | 0°C to +70°C - qualified for commercial/industrial ambient environments. |
| Package | SOT23-5 - surface-mount footprint compatible with automated assembly and space-constrained PCBs. |
Pinout & Package
MAX6308UK00D3-T is housed in a 5-pin SOT23 package with gull-wing leads, optimized for compact PCB layouts and reflow soldering. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low during reset assertion and high (to VCC) when released; no external pull-up required. |
| 2 - GND | System ground reference | Return path for internal comparators, timer, and output stage; must be low-impedance. |
| 3 - RST IN1 | First adjustable undervoltage input | Monitors external rail via resistor divider; asserts reset if voltage drops below 1.23V reference. |
| 4 - RST IN2 | Second adjustable undervoltage input | Independent comparator input for dual-rail monitoring; identical electrical behavior to RST IN1. |
| 5 - VCC | Device supply and bias source | Power input (2.5–5.5V); also powers internal reference and logic; RESET remains valid down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent undervoltage inputs | Enables simultaneous monitoring of two distinct power rails (e.g., 3.3V and 5V) using separate resistor dividers. |
| Push/pull RESET output | Eliminates external pull-up resistor, reduces BOM count, and ensures defined logic levels under all VCC conditions ≥1V. |
| Factory-programmed 140ms timeout | Guarantees sufficient hold time for microprocessor boot sequence without software or external timing components. |
| Transient immunity | Rejects VCC glitches <200µs duration (at full overdrive), preventing spurious resets in noisy power environments. |
| Low 8µA supply current | Extends battery life in portable equipment; allows continuous supervision without significant system power penalty. |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Power sequencing and brownout protection in clamshell laptops with dual-core SoCs and multiple LDO outputs. IC Role / Device Role / Timing Role: Dual-input supervisor asserting hardware reset when either core voltage (1.1V) or I/O voltage (3.3V) dips below safe operating margin. Use Value: Prevents corrupted firmware execution during AC adapter disconnect or battery sag by enforcing 140ms minimum reset pulse width. |
Use Scenario: Industrial PLC modules requiring deterministic startup after power interruption or hot-swap events. IC Role / Device Role / Timing Role: Monitoring auxiliary 5V and isolated 24V fieldbus rails to trigger controlled controller reboot before analog I/O initialization. Use Value: Ensures synchronized reset across distributed subsystems using only two pins and no external timing components. |
| Intelligent Instruments | Multivoltage Systems |
Use Scenario: Handheld test meters powered by single-cell Li-ion with regulated 3.3V and unregulated 5V display backlight supplies. IC Role / Device Role / Timing Role: Supervising both regulated and unregulated rails to detect battery undervoltage and backlight overcurrent faults simultaneously. Use Value: Enables graceful shutdown and data save before complete power loss, leveraging dual-input hysteresis and glitch rejection. |
Use Scenario: Automotive infotainment head units integrating 12V, 5V, and 3.3V domains with shared reset coordination. IC Role / Device Role / Timing Role: Coordinating reset assertion across three voltage domains using resistor-divided inputs tied to each rail's feedback node. Use Value: Eliminates need for three discrete supervisors, reducing board area and improving timing correlation between domain resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6305UK00D3-T | Open-drain RESET output; requires external pull-up resistor; same dual-RSTIN architecture and 140ms timeout. | Used where bidirectional reset I/O or wired-OR reset bus is needed (e.g., interfacing with Motorola 68HC11). | Select when system design mandates open-drain topology or shared reset bus; otherwise MAX6308UK00D3-T simplifies layout. |
| TLV809E29DBZR | Single-input, fixed 2.93V threshold; SOT23-3 package; 140ms timeout; 0.5µA supply current. | Only monitors one rail; lacks dual-input flexibility; suited for cost-sensitive single-supply applications. | Choose only for single-rail monitoring where ultra-low quiescent current outweighs need for dual supervision. |
Compared with MAX6305UK00D3-T, the MAX6308UK00D3-T eliminates external pull-up components and improves noise immunity with push/pull drive, while TLV809E29DBZR trades dual-input capability for lower cost and power in simpler systems.
Availability
MAX6308UK00D3-T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6308UK00D3-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 dual-rail monitoring and robust transient immunity.
FAQ
What is the function of the RST IN1 and RST IN2 pins on the MAX6308UK00D3-T?
The RST IN1 and RST IN2 pins on the MAX6308UK00D3-T are independent undervoltage comparator inputs, each referenced to a precise 1.23V internal bandgap. When either pin's voltage falls below this threshold-typically set via an external resistor divider-the device asserts the RESET output. This enables simultaneous monitoring of two distinct power rails, such as 3.3V and 5V, without requiring additional supervisory ICs.
Does the MAX6308UK00D3-T require an external pull-up resistor on the RESET pin?
No, the MAX6308UK00D3-T does not require an external pull-up resistor because it features an active-low push/pull RESET output. This output actively drives high (to VCC) when deasserted and low when asserted, ensuring defined logic levels across the full 1V–5.5V VCC range. This eliminates BOM components and simplifies PCB layout compared to open-drain alternatives like the MAX6305UK00D3-T.
What is the guaranteed reset timeout period for the MAX6308UK00D3-T?
The MAX6308UK00D3-T has a factory-programmed minimum reset timeout period of 140ms. This value is specified in the part number suffix "D3" and is guaranteed over temperature and process variation. The timeout begins when all monitored inputs (RST IN1 and RST IN2) rise above their respective thresholds and ensures the microprocessor receives a sufficiently long reset pulse to complete reliable initialization.
Can the MAX6308UK00D3-T operate with a VCC supply below 2.5V?
Yes, the MAX6308UK00D3-T operates with VCC as low as 1.0V, and its RESET output remains valid (guaranteed logic levels) down to VCC = 1V. However, the device transitions from undervoltage lockout to normal operation between 1.5V and 2.5V. Below 1.5V, RESET is asserted; above 2.5V, normal supervision of RST IN1/RST IN2 resumes. This behavior is confirmed in the Electrical Characteristics table and Detailed Description section.
How does the MAX6308UK00D3-T handle fast voltage transients on monitored inputs?
The MAX6308UK00D3-T rejects fast transients on RST IN1 and RST IN2 through inherent comparator hysteresis and internal filtering, as validated in Typical Operating Characteristics (TOC08 and TOC09). For example, a 100mV overdrive on RST IN_ allows transients up to ~200µs without triggering reset. Adding a 0.1µF capacitor from RST IN_ to GND further increases immunity by forming a low-pass filter, though it slows response time-designers must balance noise rejection against fault detection speed.
MAX6308UK00D3-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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6308UK00D3-T FAQ
1.How can I place an order for MAX6308UK00D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6308UK00D3-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 MAX6308UK00D3-T reliable?
The price and inventory of MAX6308UK00D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6308UK00D3-T is usually 5 days.
3.What payment methods are accepted for MAX6308UK00D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6308UK00D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6308UK00D3-T?
MAX6308UK00D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6308UK00D3-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 MAX6308UK00D3-T?
For technical support, including MAX6308UK00D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6308UK00D3-T requirements.
6.How does Aetrix verify that MAX6308UK00D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6308UK00D3-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 MAX6308UK00D3-T meets industry standards.
7.What is the process for return or replacement of MAX6308UK00D3-T?
All MAX6308UK00D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6308UK00D3-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 MAX6308UK00D3-T part is unused and in its original packaging.
Return procedure for MAX6308UK00D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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