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Analog Devices Inc./Maxim Integrated MAX6306UK29D2+T
- Part No.:
- MAX6306UK29D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK29D2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,888
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Product details
Overview
MAX6306UK29D2+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 temperature). It features a factory-programmed 20ms minimum reset timeout, manual reset input (MR), and operates from 1.0V to 5.5V with 8µA supply current. Used in multivoltage embedded systems for reliable power-on and brownout reset generation.
For engineers reviewing the MAX6306UK29D2+T datasheet, MAX6306UK29D2+T pinout, MAX6306UK29D2+T application, or MAX6306UK29D2+T equivalent, key selection criteria include its 2.93V VCC reset threshold, 20ms timeout, MR functionality, guaranteed RESET validity down to VCC = 1V, and SOT23-5 lead-free packaging - all critical for portable, battery-powered, and industrial control designs requiring robust power supervision.
Technical Context
The MAX6306UK29D2+T monitors VCC via an internal factory-trimmed resistor divider, eliminating external components. Its reset comparator uses a 1.23V internal reference, with hysteresis of 2.5mV on adjustable inputs and ±2.5% threshold accuracy over –40°C to +85°C.
It integrates a manual-reset input with 63.5kΩ internal pull-up, TTL/CMOS-compatible logic levels, and 1.5µs minimum pulse width. The push/pull RESET output sinks ≥3.2mA at VCC > 4.25V and remains valid down to VCC = 1.0V, ensuring deterministic behavior during deep brownouts.
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 collapse before microprocessor malfunction |
| Reset Timeout Period | 20ms minimum; provides sufficient hold time for CPU initialization after power stabilization |
| Supply Current | 8µA typical at +25°C; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V; supports operation through full brownout recovery down to sub-1.2V logic retention |
| RESET Output Type | Active-low push/pull; eliminates need for external pull-up resistor and drives heavy capacitive loads directly |
| Manual Reset Input | Internal 63.5kΩ pull-up; allows momentary switch interface without external components or debounce circuitry |
| Transient Immunity | Immune to VCC glitches <100ns at 2.93V overdrive; prevents false resets in noisy power environments |
Pinout & Package
Package: 5-pin SOT23 (U5+1), RoHS-compliant lead-free, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microcontroller RESET pin directly; sinks ≥3.2mA at VCC > 4.25V; valid down to VCC = 1.0V |
| 2 - GND | System ground reference | Return path for internal comparators and output stage; must be low-impedance for noise immunity |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply via external resistor divider; asserts reset if input falls below 1.23V threshold |
| 4 - MR | Manual reset input | Pull low to force system reset; internal 63.5kΩ pull-up enables switch-only interface; 1.5µs min pulse width |
| 5 - VCC | Main supply input and monitored rail | Power source and primary supervision target; internal trimmed divider sets 2.93V reset point |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set VCC threshold | 2.93V ±2.5% over –40°C to +85°C; eliminates calibration effort and external resistor networks |
| No external components required | Integrated voltage divider, reference, timer, and push/pull driver reduce BOM count and PCB area by ≥4 parts |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset assertion during deep brownout - critical for flash write integrity and state retention |
| Immunity to fast VCC transients | Rejects <100ns negative glitches at full threshold overdrive; avoids spurious resets in switching power supply environments |
| Manual reset with internal pull-up | 63.5kΩ internal resistor enables single-pole switch interface; removes need for discrete pull-up and saves board space |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters operating from single Li-ion cells with wide discharge profiles. IC Role / Device Role / Timing Role: Monitors main 3.3V rail derived from buck converter; asserts RESET during voltage sag below 2.93V to prevent corrupted sensor data logging. Use Value: 8µA quiescent current extends battery life beyond 3 years; 20ms timeout ensures full ADC and memory initialization before firmware execution. |
Use Scenario: DIN-rail mounted digital input modules exposed to 24V DC field wiring with inductive kick and EFT noise. IC Role / Device Role / Timing Role: Supervises isolated 3.3V logic supply; uses MR pin for remote watchdog-triggered reset via optocoupler. Use Value: Immunity to 100ns VCC transients prevents false resets during relay coil de-energization; push/pull output drives opto-LED directly without buffer. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: 12V automotive subsystems with load-dump and cold-crank transients, where 3.3V MCU supply must remain supervised. IC Role / Device Role / Timing Role: Primary VCC supervisor for ARM Cortex-M4 MCU; RST IN monitors 5V analog front-end rail via resistor divider. Use Value: Dual-supply monitoring (VCC + RST IN) enables coordinated reset across digital and analog domains; ±2.5% threshold stability meets AEC-Q100 Grade 2 requirements. |
Use Scenario: ANSI C12.20-certified electricity meters using supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Detects brownout on 3.3V meter SoC rail during capacitor discharge; triggers controlled shutdown and EEPROM save sequence. Use Value: RESET validity down to VCC = 1.0V guarantees final write completion before power loss; 20ms timeout aligns with EEPROM page-write timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V threshold, 200ms default timeout (adjustable via capacitor), 1.6µA IQ | Lacks manual reset input and adjustable RST IN; optimized for ultra-low-power always-on monitoring | Select when fixed 3.3V threshold suffices and lowest possible quiescent current is mandatory |
| ADM6315-29DARTZ-RL | 2.93V threshold, open-drain output, 200ms timeout, –40°C to +125°C rating | Requires external pull-up; no MR or RST IN inputs; wider temp range but higher 12µA IQ | Select for extended temperature operation where push/pull drive and manual reset are not required |
Compared with TPS3808G33DBVR and ADM6315-29DARTZ-RL, the MAX6306UK29D2+T uniquely combines factory-trimmed 2.93V accuracy, integrated MR and RST IN inputs, push/pull output, and 20ms timeout in a single SOT23-5 package - enabling compact, feature-complete reset supervision without design compromises.
Availability
MAX6306UK29D2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across long production lifecycles.
Supply support for MAX6306UK29D2+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervision in space-constrained, battery-sensitive systems - delivering precision reset thresholds, low IQ, and integrated features like MR and dual-input monitoring in SOT23 packages.
FAQ
What is the exact reset threshold voltage of the MAX6306UK29D2+T?
The MAX6306UK29D2+T has a factory-programmed nominal VCC reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. This value is set by an internal trimmed resistor divider and does not require external calibration. The "29" in the part number explicitly denotes the 2.93V threshold per Maxim's ordering convention.
Does the MAX6306UK29D2+T support manual reset functionality?
Yes, the MAX6306UK29D2+T includes a dedicated MR (manual reset) input on pin 4. Pulling MR low forces an immediate active-low RESET assertion, which remains active for the full 20ms timeout period after MR returns high. An internal 63.5kΩ pull-up resistor allows direct connection of a momentary switch to ground without external components.
Can the MAX6306UK29D2+T monitor a second voltage rail besides VCC?
Yes, the MAX6306UK29D2+T features an RST IN input (pin 3) that functions as an adjustable undervoltage monitor. By connecting an external resistor divider between the secondary rail and ground, the device can assert RESET when that rail falls below a user-defined threshold referenced to the internal 1.23V comparator input.
What is the minimum VCC voltage at which RESET remains valid on the MAX6306UK29D2+T?
The MAX6306UK29D2+T guarantees valid RESET output down to VCC = 1.0V. Below this level, the push/pull driver's sink/source capability degrades, but the device continues asserting RESET until VCC drops below the functional limit. This ensures reliable reset hold during deep brownout conditions common in battery-powered systems.
Is the MAX6306UK29D2+T pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, all MAX6305–MAX6313 devices share identical SOT23-5 pinouts and footprint. The MAX6306UK29D2+T uses the same pin configuration as MAX6306/MAX6309/MAX6312 variants: RESET (pin 1), GND (pin 2), RST IN (pin 3), MR (pin 4), and VCC (pin 5). This enables drop-in replacement within the same functional subgroup when threshold and timeout match design requirements.
MAX6306UK29D2+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:
- 2.93V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6306UK29D2+T FAQ
1.How can I place an order for MAX6306UK29D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK29D2+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 MAX6306UK29D2+T reliable?
The price and inventory of MAX6306UK29D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK29D2+T is usually 5 days.
3.What payment methods are accepted for MAX6306UK29D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK29D2+T transactions.
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4.How is shipping managed for MAX6306UK29D2+T?
MAX6306UK29D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK29D2+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 MAX6306UK29D2+T?
For technical support, including MAX6306UK29D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK29D2+T requirements.
6.How does Aetrix verify that MAX6306UK29D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK29D2+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 MAX6306UK29D2+T meets industry standards.
7.What is the process for return or replacement of MAX6306UK29D2+T?
All MAX6306UK29D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK29D2+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 MAX6306UK29D2+T part is unused and in its original packaging.
Return procedure for MAX6306UK29D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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