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Analog Devices Inc./Maxim Integrated MAX6306UK25D1-T
- Part No.:
- MAX6306UK25D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK25D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,993
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Product details
Overview
MAX6306UK25D1-T from Maxim Integrated is a precision 5-pin SOT23 programmable supervisory IC that monitors VCC supply voltage and asserts an active-low push/pull reset signal when VCC falls below 2.5V ±2.5% (25°C), with 1ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring reliable power-on and brownout reset for microprocessors.
For engineers reviewing the MAX6306UK25D1-T datasheet, MAX6306UK25D1-T pinout, MAX6306UK25D1-T application, or MAX6306UK25D1-T equivalent, this page delivers verified functional identity, factory-programmed threshold and timeout, SOT23-5 package mapping, manual-reset input behavior, and real-world substitution guidance - all grounded in Maxim's official documentation.
Technical Context
The MAX6306UK25D1-T implements a factory-trimmed internal voltage divider to monitor VCC against a precise 2.5V threshold, with ±2.5% tolerance over –40°C to +85°C and 40ppm/°C temperature coefficient. Its reset generator includes a programmable 1ms (min) timeout and guarantees valid logic-level output even as VCC drops to 1V.
This device integrates a manual-reset input (MR) with internal 63.5kΩ pull-up, TTL/CMOS-compatible logic thresholds, and immunity to fast VCC transients - enabling robust operation in noisy portable and industrial environments without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.5V ±2.5% at –40°C to +85°C - factory-trimmed for accurate brownout detection in 3.3V/5V systems |
| Reset Timeout Period | 1ms (minimum) - ensures sufficient processor initialization time after power stabilization |
| Supply Current | 8µA typical at +25°C - enables battery-powered operation with minimal quiescent drain |
| RESET Output Type | Active-low push/pull - drives high/low without external pull-up, compatible with bidirectional µP reset pins |
| MR Input Logic | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC - supports direct connection to 3V/5V logic and momentary switches |
| Operating Voltage Range | VCC = (2.5V + 2.5%) to +5.5V - ensures stable supervision across full system supply range |
| Temperature Range | 0°C to +70°C - commercial-grade operation suitable for PC, instrumentation, and industrial control |
Pinout & Package
MAX6306UK25D1-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low during reset assertion; sources current when deasserted - eliminates need for external pull-up resistor |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be connected to main system ground plane |
| 3 - RST IN | Adjustable undervoltage reset input | Accepts external resistor divider to monitor secondary supply (e.g., 3.3V rail); threshold set by 1.23V internal reference |
| 4 - MR | Manual-reset input | Pull low to force reset; internal 63.5kΩ pull-up allows floating or VCC tie-off when unused |
| 5 - VCC | Main supply input and monitored rail | Power source and primary voltage under supervision; internal divider sets 2.5V reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 2.5V threshold | ±2.5% tolerance over full temperature range - eliminates calibration effort in production |
| 1ms minimum reset timeout | Guaranteed assertion duration prevents premature µP release during power ramp-up |
| Push/pull RESET output | No external pull-up required - reduces BOM count and improves noise immunity on reset line |
| Manual-reset input with internal pull-up | 63.5kΩ integrated resistor - simplifies board design and supports switch-only reset implementation |
| Immunity to short VCC transients | Rejects glitches <1µs wide at 2.5V overdrive - avoids spurious resets in electrically noisy environments |
Applications
| PC Power Sequencing | Industrial Controller Supervision |
|---|---|
Use Scenario: Coordinating power-up of CPU, memory, and I/O rails in desktop and embedded PCs. IC Role / Device Role / Timing Role: Monitors 5V and 3.3V supplies simultaneously; asserts RESET until both stabilize above 2.5V and timeout expires. Use Value: Prevents boot failure due to out-of-spec VCC sequencing - critical for x86 and ARM-based platforms. |
Use Scenario: Ensuring deterministic restart after brownout in PLCs and motor drives. IC Role / Device Role / Timing Role: Primary VCC supervisor with MR input for operator-initiated recovery; holds RESET low for ≥1ms post-recovery. Use Value: Eliminates firmware watchdog dependency and guarantees hardware-level reset integrity. |
| Portable Instrumentation | Multivoltage Embedded Systems |
Use Scenario: Battery-powered handheld test equipment with dual 3.3V/5V domains. IC Role / Device Role / Timing Role: Supervises main 3.3V rail (via VCC pin) and auxiliary 5V analog supply (via RST IN divider). Use Value: Enables single-chip supervision of heterogeneous voltage domains - reducing component count and PCB area. |
Use Scenario: Industrial gateways combining 24V field bus, 5V logic, and 3.3V MCU rails. IC Role / Device Role / Timing Role: Acts as central reset arbiter; uses MR input for remote reset via GPIO or optocoupler. Use Value: Provides unified reset coordination across disparate supply domains without custom logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D2-T | Same 2.5V threshold but 20ms min reset timeout vs. 1ms | Suitable where longer reset hold time is required for slow-starting peripherals | Select only if extended timeout improves system reliability - not a drop-in replacement |
| TPS3808G12DBVR | 2.5V threshold, 20ms fixed timeout, 1.5µA IQ, SOT23-6 package | Lacks manual-reset input and adjustable RST IN; lower quiescent current but different pinout | Prefer for ultra-low-power designs where MR and secondary monitoring are unnecessary |
Compared with MAX6306UK25D1-T, MAX6306UK25D2-T extends reset assertion for slower power rails, while TPS3808G12DBVR trades manual reset and dual-input capability for lower supply current and tighter threshold accuracy - requiring PCB layout revision.
Availability
MAX6306UK25D1-T is available at Aetrix Electronics and suitable for portable computers, industrial controllers, and multivoltage embedded systems requiring stable component supply with guaranteed commercial-temperature performance and tape-and-reel delivery.
Supply support for MAX6306UK25D1-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 - with emphasis on high-reliability, low-power solutions.
MAX6306UK25D1-T belongs to the MAX6305–MAX6313 family of programmable supervisory circuits, engineered specifically for multivoltage microprocessor systems needing factory-configured reset thresholds and robust transient immunity.
FAQ
What is the exact reset threshold voltage for MAX6306UK25D1-T?
The MAX6306UK25D1-T has a factory-programmed VCC reset threshold of 2.5V, with ±2.5% tolerance over the full operating temperature range (0°C to +70°C). This value is trimmed internally using a precision voltage divider and is documented in Maxim's Electrical Characteristics table under "Reset Threshold (VTH)" for the MAX6306 series.
Does MAX6306UK25D1-T support manual reset functionality?
Yes, MAX6306UK25D1-T includes a dedicated MR (manual-reset) input on pin 4. Pulling MR low forces an immediate reset assertion, which remains active for the full 1ms timeout period after MR returns high. An internal 63.5kΩ pull-up resistor allows MR to be left unconnected or tied to VCC when unused.
What is the function of the RST IN pin on MAX6306UK25D1-T?
The RST IN pin (pin 3) on MAX6306UK25D1-T is an adjustable undervoltage reset input referenced to an internal 1.23V comparator threshold. When used with an external resistor divider, it enables monitoring of a secondary supply rail (e.g., 3.3V or 1.8V), independent of the primary VCC supervision.
Is MAX6306UK25D1-T compatible with 3.3V microcontrollers?
Yes, MAX6306UK25D1-T is fully compatible with 3.3V microcontrollers. Its MR input accepts CMOS logic levels (VIH ≥ 0.7×VCC), its RESET output operates down to VCC = 1V, and its 2.5V reset threshold is appropriate for detecting brownout on 3.3V rails. The push/pull output drives cleanly into standard 3.3V logic inputs without level-shifting.
What package type and footprint does MAX6306UK25D1-T use?
MAX6306UK25D1-T uses a 5-pin SOT23 package (package code U5+1, outline 21-0057, land pattern 90-0174). This compact surface-mount package measures 2.9mm × 1.6mm × 1.1mm and is compatible with standard SMT reflow processes, including lead-free soldering at +260°C.
MAX6306UK25D1-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:
- 2.5V
- 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
MAX6306UK25D1-T FAQ
1.How can I place an order for MAX6306UK25D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK25D1-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 MAX6306UK25D1-T reliable?
The price and inventory of MAX6306UK25D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK25D1-T is usually 5 days.
3.What payment methods are accepted for MAX6306UK25D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK25D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK25D1-T?
MAX6306UK25D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK25D1-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 MAX6306UK25D1-T?
For technical support, including MAX6306UK25D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK25D1-T requirements.
6.How does Aetrix verify that MAX6306UK25D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK25D1-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 MAX6306UK25D1-T meets industry standards.
7.What is the process for return or replacement of MAX6306UK25D1-T?
All MAX6306UK25D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK25D1-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 MAX6306UK25D1-T part is unused and in its original packaging.
Return procedure for MAX6306UK25D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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