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Analog Devices Inc./Maxim Integrated MAX6306UK46D3
- Part No.:
- MAX6306UK46D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK46D3.pdf
- Description:
- IC SUPERVISOR 5PIN MULT INPUT
- Quantity:
- Payment:
- Shipping:
Inventory:597
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Product details
Overview
MAX6306UK46D3 from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC supply voltage and asserts an active-low push/pull reset output when VCC falls below 4.63V (±2.5% over temperature), with factory-programmed 140ms minimum reset timeout. It includes manual-reset input (MR) and adjustable undervoltage reset input (RST IN), supporting multivoltage systems like 3.3V/5V PCs and embedded controllers. Supply current is 8µA typical.
For engineers reviewing the MAX6306UK46D3 datasheet, MAX6306UK46D3 pinout, MAX6306UK46D3 application, or MAX6306UK46D3 equivalent, key selection considerations include its guaranteed RESET validity down to VCC = 1V, immunity to fast VCC transients (<100ns), factory-trimmed 4.63V threshold with ±2.5% tolerance over –40°C to +85°C, MR input with internal 63.5kΩ pull-up, and compatibility with bidirectional µP reset pins via push/pull drive.
Technical Context
The MAX6306UK46D3 uses an internal factory-trimmed resistor divider to monitor VCC against a precision reference, enabling fixed 4.63V reset threshold detection. Its reset generator incorporates a monostable timer that holds RESET asserted for ≥140ms after all monitored supplies recover above threshold.
This device integrates three independent reset sources: VCC monitoring (4.63V nominal), manual-reset input (MR), and external undervoltage comparator input (RST IN) referenced to 1.23V. All inputs feature ±25nA leakage and transient immunity-designed to ignore negative-going VCC glitches up to 100µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V ±2.5% over –40°C to +85°C - ensures reliable brownout detection in 5V systems with margin for supply ripple and drift |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor initialization before release |
| Supply Current | 8µA typical at VCC = 5.5V - 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 I/O |
| MR Input Logic | CMOS/TTL-compatible with 63.5kΩ internal pull-up - allows momentary switch or logic-level assertion without external components |
| RST IN Threshold | 1.23V ±0.03V - supports external resistor-divider programming of secondary undervoltage monitoring points |
| Operating Voltage Range | VCC = (VTH + 2.5%) to +5.5V = 4.75V to 5.5V - defines valid supply window for functional reset assertion |
Pinout & Package
MAX6306UK46D3 is housed in a RoHS-compliant 5-pin SOT23 package (outline U5+1, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert system reset; 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 low-impedance connection to minimize noise coupling |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external voltage (via resistor divider) to 1.23V reference - enables monitoring of auxiliary rails (e.g., 3.3V, 2.5V) |
| 4 - MR | Manual-reset input | Logic-low active input with internal 63.5kΩ pull-up - debounced by design; no external RC required for basic switch interface |
| 5 - VCC | Main supply input and monitored rail | Power source and primary supervision target; internal trimmed divider sets 4.63V threshold - not usable as general-purpose supply pin below 4.75V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.63V reset threshold | ±2.5% tolerance over full industrial temperature range (–40°C to +85°C) - eliminates calibration effort and improves BOM consistency |
| 140ms minimum reset timeout | Guaranteed assertion duration independent of VCC ramp rate - ensures µP core and peripherals fully stabilize before release |
| Push/pull RESET output | Active-low, capable of sourcing/sinking >800µA - interfaces directly with bidirectional µP reset pins (e.g., 68HC11) without pull-up |
| Immunity to VCC transients | Rejects negative-going glitches <100µs wide at 100mV overdrive - prevents spurious resets during switching noise or load dumps |
| MR input with internal pull-up | 63.5kΩ integrated resistor - enables single-pole switch-to-GND implementation; reduces component count and board space |
Applications
| Industrial PLC Controller | 5V/3.3V Dual-Rail PC Peripheral |
|---|---|
Use Scenario: Programmable logic controller operating in factory automation with 5V I/O and 3.3V FPGA core. IC Role / Device Role / Timing Role: Primary VCC supervisor for 5V rail; secondary RST IN monitors 3.3V FPGA supply via resistor divider. Use Value: Prevents FPGA configuration corruption during 5V brownout while ensuring 3.3V rail stability - avoids lockup without software intervention. |
Use Scenario: USB-to-serial adapter card requiring coordinated reset of 5V USB interface and 3.3V UART IC. IC Role / Device Role / Timing Role: Monitors 5V bus power and asserts synchronized reset to both interface ICs via push/pull output. Use Value: Eliminates need for dual-reset generators; 140ms timeout exceeds USB enumeration timing requirements. |
| Portable Medical Monitor | Battery-Powered Data Logger |
Use Scenario: Handheld ECG device powered by Li-ion battery with regulated 5V and 3.3V outputs. IC Role / Device Role / Timing Role: Supervises main 5V supply and provides MR input for emergency hardware reset via front-panel button. Use Value: 8µA supply current extends battery life; MR debounce is intrinsic - no added capacitors needed in space-constrained enclosure. |
Use Scenario: Remote environmental sensor node using coin-cell battery and ultra-low-power MCU. IC Role / Device Role / Timing Role: Ensures clean MCU boot after cold start or battery insertion; RST IN monitors backup LDO output. Use Value: Guaranteed RESET validity down to VCC = 1V prevents undefined state during battery ramp-up - critical for flash write integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306EUK46D3 | Extended temperature range (–40°C to +85°C) vs. standard (0°C to +70°C); identical electrical specs and pinout | Required for automotive under-hood or industrial outdoor deployments where ambient exceeds 70°C | Select MAX6306EUK46D3 when operating temperature exceeds 70°C; otherwise MAX6306UK46D3 suffices for commercial-grade systems |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 4.63V); 200ms timeout; open-drain output (requires pull-up); 1.5µA supply current | Optimized for 3.3V-only systems; lower power but lacks MR input and dual-rail monitoring capability | Choose TPS3808G33DBVR only for single-rail 3.3V designs prioritizing ultra-low current; MAX6306UK46D3 remains superior for 5V/3.3V coordination |
Compared with MAX6306EUK46D3, the MAX6306UK46D3 offers identical functionality at lower cost for commercial-temperature applications, while the TPS3808G33DBVR trades flexibility (no MR, no RST IN, fixed threshold) for lower quiescent current - making it unsuitable as a drop-in replacement but viable for simplified 3.3V-only use cases.
Availability
MAX6306UK46D3 is available at Aetrix Electronics and suitable for industrial PLC controllers, 5V/3.3V dual-rail PC peripherals, portable medical monitors, and battery-powered data loggers requiring stable component supply across production volumes.
Supply support for MAX6306UK46D3 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 designed to provide compact, low-power, multi-input reset supervision for multivoltage embedded systems - addressing demand for reliable power-on reset, brownout protection, and manual recovery in space-constrained applications.
FAQ
What is the exact reset threshold voltage of the MAX6306UK46D3?
The MAX6306UK46D3 has a factory-trimmed nominal VCC reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the operating temperature range of 0°C to +70°C. This value corresponds to the "46" in the part number per Table 1 of the datasheet, and is set by an internal precision resistor divider - no external adjustment is possible for this parameter.
Does the MAX6306UK46D3 support manual reset functionality?
Yes, the MAX6306UK46D3 includes a dedicated MR (manual-reset) input on pin 4. A logic-low signal on MR forces RESET assertion for the full timeout period (≥140ms) after MR returns high. The pin features an internal 63.5kΩ pull-up resistor, allowing direct connection of a momentary switch to ground without external components.
Can the MAX6306UK46D3 monitor voltages other than VCC?
Yes, the MAX6306UK46D3 provides an adjustable RST IN input (pin 3) referenced to a precise 1.23V internal comparator threshold. By connecting an external resistor divider, users can program monitoring of auxiliary rails such as 3.3V or 2.5V - enabling dual-supply supervision in a single 5-pin SOT23 package.
What is the minimum VCC voltage at which the MAX6306UK46D3 guarantees valid RESET output?
The MAX6306UK46D3 guarantees valid RESET output down to VCC = 1V, meaning the push/pull driver maintains specified VOL and VOH levels even as supply drops to 1V. Below 1V, output drive capability degrades - so system design must ensure critical logic remains inactive or is held in reset until VCC exceeds 1V.
Is the MAX6306UK46D3 pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, all MAX6305–MAX6313 devices share identical 5-pin SOT23 pinout and footprint. However, function varies by part number: MAX6306UK46D3 provides VCC monitoring + MR + RST IN, while MAX6305 offers dual RST IN inputs and MAX6313 adds OVRST IN. Pin compatibility enables layout reuse, but firmware and external circuitry must match the selected variant's feature set.
MAX6306UK46D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- 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
MAX6306UK46D3 FAQ
1.How can I place an order for MAX6306UK46D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK46D3 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 MAX6306UK46D3 reliable?
The price and inventory of MAX6306UK46D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK46D3 is usually 5 days.
3.What payment methods are accepted for MAX6306UK46D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK46D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK46D3?
MAX6306UK46D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK46D3 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 MAX6306UK46D3?
For technical support, including MAX6306UK46D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK46D3 requirements.
6.How does Aetrix verify that MAX6306UK46D3 is sourced from the original manufacturer or authorized distributors?
All MAX6306UK46D3 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 MAX6306UK46D3 meets industry standards.
7.What is the process for return or replacement of MAX6306UK46D3?
All MAX6306UK46D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK46D3, 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 MAX6306UK46D3 part is unused and in its original packaging.
Return procedure for MAX6306UK46D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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