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Analog Devices Inc./Maxim Integrated MAX6306EUK29D3+T
- Part No.:
- MAX6306EUK29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306EUK29D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,404
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Product details
Overview
MAX6306EUK29D3+T from Maxim Integrated is a precision 5-pin SOT23 programmable reset IC designed to monitor VCC supply voltage and assert an active-low push/pull RESET signal when VCC falls below 2.93V (±2.5% over -40°C to +85°C). It features factory-programmed 140ms minimum reset timeout, manual reset input (MR), and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems for reliable power-on and brownout reset generation.
For engineers reviewing the MAX6306EUK29D3+T datasheet, MAX6306EUK29D3+T pinout, MAX6306EUK29D3+T application, or MAX6306EUK29D3+T equivalent, this page delivers verified specifications, thermal-stable threshold behavior, MR timing constraints, SOT23-5 terminal mapping, and direct alternatives for dual-supply monitoring in industrial controllers and portable equipment.
Technical Context
The MAX6306EUK29D3+T uses an internal factory-trimmed resistor divider to set its nominal VCC reset threshold at 2.93V, with ±2.5% tolerance across -40°C to +85°C and 40ppm/°C drift. Its reset timeout is fixed at D3 (140ms min), generated by an on-chip RC timer independent of external components.
This device integrates a manual-reset input with 63.5kΩ internal pull-up, TTL/CMOS-compatible logic thresholds, and guaranteed reset assertion even as VCC drops to 1V. It ignores fast transients on VCC due to built-in immunity circuitry, and supports undervoltage monitoring only on VCC - no adjustable RST IN or OVRST IN inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V ±2.5% (–40°C to +85°C); ensures reliable detection of 3.3V rail brownout before µP malfunction. |
| Reset Timeout Period | 140ms minimum; provides sufficient hold time for stable clock and memory initialization during power-up. |
| Supply Current | 8µA typical at +25°C; enables battery longevity in portable/battery-powered equipment. |
| Operating Temperature | –40°C to +85°C; qualified for industrial and automotive under-hood environments. |
| RESET Output Type | Active-low push/pull; drives µP reset pin directly without external pull-up, sinking 3.2mA at VCC > 4.25V. |
| MR Input Logic | TTL/CMOS compatible; low pulse ≥1.5µs asserts reset; internal 63.5kΩ pull-up allows floating if unused. |
| VCC Range | 2.93V × 1.025 = 3.00V to 5.5V; minimum operating VCC is defined by threshold +2.5% margin. |
Pinout & Package
MAX6306EUK29D3+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 reflow-solderable per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microprocessor reset pin directly; sinks 3.2mA at VCC > 4.25V; valid down to VCC = 1V. |
| 2 - GND | System ground reference | Return path for all internal comparators and output driver; must be low-impedance for noise immunity. |
| 3 - RST IN | Adjustable undervoltage reset input | Not connected internally on MAX6306; pin is NC (no function) - unused and must be left open or tied to VCC. |
| 4 - MR | Manual reset input | Pull low ≥1.5µs to force reset; internal 63.5kΩ pull-up eliminates need for external resistor. |
| 5 - VCC | Supply voltage input & monitored rail | Primary power source and monitored voltage; internal trimmed divider sets 2.93V reset threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set threshold | 2.93V ±2.5% over full temperature range - eliminates calibration and reduces BOM count. |
| No external components required | Integrated RC timeout and internal voltage divider enable single-chip reset solution in space-constrained designs. |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout, preventing µP lockup or undefined execution. |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 2.93V overdrive - avoids spurious resets in noisy power environments. |
| Manual reset with internal pull-up | 63.5kΩ internal MR pull-up simplifies PCB layout and supports momentary switch interface without discrete resistors. |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers with dual 5V/3.3V rails. IC Role / Device Role / Timing Role: Monitors 3.3V VCC rail and asserts RESET if voltage sags below 2.93V during load switching or ESD events. Use Value: Prevents firmware corruption during transient brownouts; 140ms timeout ensures FPGA configuration completes before release. |
Use Scenario: Battery-backed vital signs monitor requiring fail-safe boot after Li-ion recharge cycles. IC Role / Device Role / Timing Role: Detects 3.3V system rail collapse during battery swap and holds µP in reset until stable. Use Value: Eliminates need for external RC network; 8µA quiescent current extends standby runtime by >12 months. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Cold-cranking operation where 12V-to-3.3V DC/DC output dips below regulation during engine start. IC Role / Device Role / Timing Role: Supervises post-regulator 3.3V rail and triggers hardware reset before CAN controller enters error passive mode. Use Value: –40°C to +85°C rating ensures operation in under-hood environments; MR pin enables service-mode reset via diagnostic port. |
Use Scenario: Tamper-resistant electricity meter with isolated MCU and metrology ASIC powered from split-rail supply. IC Role / Device Role / Timing Role: Resets metering SoC when 3.3V auxiliary rail drops during mains interruption or surge events. Use Value: Factory-trimmed 2.93V threshold matches 3.3V LDO dropout margin; eliminates field calibration labor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.08V threshold (±0.5%), 200ms timeout, 1.4µA IQ, SOT23-5 | Higher accuracy and lower current, but no manual reset input | Select when ultra-low power and tighter threshold tolerance are prioritized over MR functionality. |
| ADM6315-29DARTZ-RL | 2.93V threshold (±2.0%), 140ms timeout, 12µA IQ, SOT23-5, open-drain RESET | Same threshold and timeout, but open-drain output requires external pull-up | Choose when board already includes pull-up on RESET net and cost-sensitive sourcing is needed. |
Compared with MAX6306EUK29D3+T, TPS3808G33DBVR offers superior accuracy and quiescent current but lacks MR; ADM6315-29DARTZ-RL matches threshold and timeout but requires external pull-up and draws higher supply current - both serve as functional alternatives where push/pull output or MR is not mandatory.
Availability
MAX6306EUK29D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6306EUK29D3+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, automotive, and communications applications.
The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervisory functions - delivering precision, low-power, and transient-immune reset generation in compact SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6306EUK29D3+T and how does it vary with temperature?
The MAX6306EUK29D3+T has a factory-trimmed nominal VCC reset threshold of 2.93V, with ±2.5% tolerance over the full –40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, meaning threshold drift is bounded within ±0.012V over the entire temperature span. This specification is guaranteed by design and validated across production lots.
Does MAX6306EUK29D3+T support monitoring of voltages other than VCC, such as 5V or 12V rails?
No - MAX6306EUK29D3+T monitors only the VCC pin (pin 5) using its internal factory-trimmed voltage divider. It does not include functional RST IN or OVRST IN inputs; pin 3 is unconnected. To supervise additional rails like 5V or 12V, a separate supervisor IC or external resistor divider into a compatible device (e.g., MAX6307) is required.
What is the minimum VCC voltage at which MAX6306EUK29D3+T guarantees valid RESET output?
MAX6306EUK29D3+T guarantees valid active-low RESET output down to VCC = 1V. Below this level, push/pull drive capability degrades significantly. The device remains functional and asserts RESET as long as VCC stays above the minimum operating voltage defined by its threshold +2.5% margin (~3.00V).
Can the manual reset (MR) pin of MAX6306EUK29D3+T be left floating, or must it be terminated?
The MR pin of MAX6306EUK29D3+T includes a factory-integrated 63.5kΩ pull-up resistor to VCC, so it may be safely left unconnected (floating) if manual reset functionality is not used. No external termination is required. However, in noisy environments, connecting a 0.1µF capacitor from MR to GND improves immunity to ESD and EMI.
Is MAX6306EUK29D3+T pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes - all MAX6305–MAX6313 devices share identical 5-pin SOT23-5 pinout and footprint (U5+1). However, internal functionality differs: MAX6306EUK29D3+T has MR and VCC monitoring only, while MAX6307 adds OVRST IN, and MAX6305 provides dual RST IN inputs. Pin compatibility does not imply functional interchangeability.
MAX6306EUK29D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, Adj
- 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
MAX6306EUK29D3+T FAQ
1.How can I place an order for MAX6306EUK29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306EUK29D3+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 MAX6306EUK29D3+T reliable?
The price and inventory of MAX6306EUK29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306EUK29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6306EUK29D3+T?
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4.How is shipping managed for MAX6306EUK29D3+T?
MAX6306EUK29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306EUK29D3+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 MAX6306EUK29D3+T?
For technical support, including MAX6306EUK29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306EUK29D3+T requirements.
6.How does Aetrix verify that MAX6306EUK29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6306EUK29D3+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 MAX6306EUK29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6306EUK29D3+T?
All MAX6306EUK29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306EUK29D3+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 MAX6306EUK29D3+T part is unused and in its original packaging.
Return procedure for MAX6306EUK29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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