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Analog Devices Inc./Maxim Integrated MAX6825YUK+
- Part No.:
- MAX6825YUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6825YUK+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:974
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Product details
Overview
MAX6825YUK+ from Maxim Integrated is a low-voltage microprocessor supervisory circuit in a 5-pin SOT23 package, combining voltage monitoring (2.19V threshold), manual reset input, and dual push-pull RESET outputs. It asserts reset during power-up, brownout, or manual trigger, with guaranteed valid reset down to VCC = +1.0V, and supports critical µP monitoring in portable and embedded controllers.
For engineers reviewing the MAX6825YUK+ datasheet, MAX6825YUK+ pinout, MAX6825YUK+ application, or MAX6825YUK+ equivalent, this page delivers verified electrical specs, true pin functions, confirmed use cases in battery-powered equipment and intelligent instruments, and validated alternative parts for design continuity.
Technical Context
The MAX6825YUK+ integrates a precision voltage monitor with 2.19V ±1.5% threshold (–40°C to +125°C), a 140ms minimum reset timeout period, and a debounced manual reset input with internal 50kΩ pullup. Its dual push-pull RESET outputs (active-low RESET and active-high RESET) operate independently and remain valid even as VCC drops to +1.0V.
Unlike MAX6821–MAX6824, the MAX6825YUK+ omits the watchdog timer but retains MR functionality and both RESET outputs - enabling deterministic reset control without timing supervision overhead. It is specified for operation across –40°C to +125°C and requires no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V ±1.5% (Y suffix); ensures reliable brownout detection for 2.2V–2.5V logic rails |
| Reset Timeout Period | 140ms min; guarantees µP initialization completes before release |
| Supply Voltage Range | +1.2V to +5.5V (–40°C to +125°C); supports ultra-low-power and 5V systems |
| RESET Output Type | Dual push-pull: RESET (active-low), RESET (active-high); eliminates need for external pullups/inverters |
| MR Input Logic | Active-low with 50kΩ internal pullup; enables momentary switch interface without external R |
| VCC Reset Validity | Guaranteed down to +1.0V; maintains correct reset state during deep brownout |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive-adjacent embedded use |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline), surface-mount, RoHS-compliant (+ suffix), footprint compatible with standard 0.95mm pitch land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during reset; drives µP /RESET directly without pullup |
| 2 | GND | Ground reference for all internal circuits and reset timing |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; 1µs minimum pulse width |
| 4 | WDI | Not connected (NC) in MAX6825; watchdog function disabled per datasheet selector guide |
| 5 | VCC | Supply and monitored voltage input; reset assertion triggered when VCC falls below 2.19V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent RESET outputs | Simultaneous active-low and active-high push-pull signals eliminate level-shifting or inversion logic |
| No external components required | Internal pullup on MR and precision voltage reference reduce BOM count and layout area |
| Reset validity to 1.0V VCC | Ensures deterministic reset behavior during severe supply sag, critical for battery cutoff scenarios |
| 140ms minimum reset timeout | Meets JEDEC JESD78 reliability requirements for µP power-on reset duration |
| 5-pin SOT23 footprint | Enables space-constrained designs in portable instrumentation and set-top box power management |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and brownout recovery in digital broadcast receivers with multi-rail supplies. IC Role / Device Role / Timing Role: Supervises 3.3V and 1.8V processor rails; asserts synchronized reset on VCC dip or front-panel reset button press. Use Value: Prevents corrupted firmware execution during unstable AC/DC adapter transitions or ESD-induced supply glitches. | Use Scenario: Runtime voltage monitoring in handheld test meters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Monitors battery voltage decay to 2.19V; triggers controlled shutdown before deep discharge damages cell. Use Value: Extends usable battery life by enabling graceful µP save-and-hibernate before cutoff at ~2.2V. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC I/O modules requiring fail-safe boot integrity after power interruption. IC Role / Device Role / Timing Role: Provides manual reset via isolated opto-input and monitors 2.5V FPGA configuration rail. Use Value: Guarantees FPGA reconfiguration only after stable VCC >2.19V and full 140ms reset hold time. | Use Scenario: Calibration-grade multimeters with real-time µP-based ADC control and auto-ranging logic. IC Role / Device Role / Timing Role: Dual RESET outputs coordinate analog front-end power-up and digital core initialization. Use Value: Eliminates race conditions between analog reference settling and µP clock stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823YUK+ | Same 2.19V threshold, SOT23-5, manual reset, but provides only single push-pull RESET (active-low) and includes watchdog timer | Requires external inverter or logic to generate active-high reset signal; watchdog adds software overhead | Select MAX6823YUK+ only if watchdog supervision is required and active-high reset can be synthesized externally |
| TPS3808G18DBVR | TI part with 1.8V threshold, 200ms reset timeout, open-drain RESET, no manual reset input, no second RESET output | Lacks MR and dual RESET; requires external pullup and separate reset polarity handling | Choose TPS3808G18DBVR for cost-sensitive 1.8V-only applications where manual reset and dual outputs are unnecessary |
Compared with MAX6823YUK+, the MAX6825YUK+ trades watchdog capability for deterministic dual-reset control without external logic; versus TPS3808G18DBVR, it offers higher threshold accuracy, MR support, and push-pull drive - making it optimal for 2.2V systems needing robust manual intervention and polarity flexibility.
Availability
MAX6825YUK+ is available at Aetrix Electronics and suitable for set-top boxes, portable/battery-powered equipment, and intelligent instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6825YUK+ 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 industrial, communications, and computing applications.
The MAX682x family targets low-voltage microprocessor supervision in space-constrained, high-reliability embedded systems - emphasizing minimal external components, wide temperature operation, and flexible reset signaling.
FAQ
What is the exact reset threshold voltage of the MAX6825YUK+?
The MAX6825YUK+ has a factory-trimmed reset threshold of 2.19V, with ±1.5% tolerance over the full –40°C to +125°C operating range. This value is fixed by the 'Y' suffix and verified per the Threshold Suffix Guide in the datasheet; it applies specifically to the MAX6825YUK+ and not other variants like MAX6825MUK+ (4.38V).
Does the MAX6825YUK+ include a watchdog timer?
No, the MAX6825YUK+ does not include a watchdog timer. Per the Selector Guide and Pin Configurations table, MAX6825 is explicitly defined as having manual reset (MR) and dual push-pull RESET outputs but no WDI functionality - unlike MAX6821–MAX6824. The WDI pin (Pin 4) is NC in MAX6825YUK+.
What are the functions of the two RESET outputs on the MAX6825YUK+?
The MAX6825YUK+ provides two independent push-pull reset outputs: Pin 1 is RESET (active-low), asserted low during reset; Pin 3 is RESET (active-high), asserted high during reset. Both are driven actively - no external pull resistors needed - and share the same 140ms timeout period, enabling direct interface to µPs with either reset polarity requirement.
Can the MAX6825YUK+ operate reliably below 1.8V supply?
Yes, the MAX6825YUK+ guarantees valid reset operation down to VCC = +1.0V, and its operating voltage range extends from +1.2V to +5.5V over –40°C to +125°C. This allows use in ultra-low-power systems such as coin-cell–powered instruments where supply may sag below 1.8V during peak current draw.
Is the MR input on the MAX6825YUK+ internally pulled up, and what is its default state?
Yes, the MR input on the MAX6825YUK+ features an internal 50kΩ pullup resistor to VCC, as confirmed in the Pin Description and Applications Information sections. When left unconnected, MR remains at VIH (>0.7×VCC), keeping the device out of manual reset; pulling MR low (to GND) for ≥1µs initiates a full reset sequence with 140ms timeout.
MAX6825YUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.19V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6825YUK+ FAQ
1.How can I place an order for MAX6825YUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6825YUK+ 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 MAX6825YUK+ reliable?
The price and inventory of MAX6825YUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6825YUK+ is usually 5 days.
3.What payment methods are accepted for MAX6825YUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6825YUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6825YUK+?
MAX6825YUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6825YUK+ 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 MAX6825YUK+?
For technical support, including MAX6825YUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6825YUK+ requirements.
6.How does Aetrix verify that MAX6825YUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6825YUK+ 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 MAX6825YUK+ meets industry standards.
7.What is the process for return or replacement of MAX6825YUK+?
All MAX6825YUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6825YUK+, 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 MAX6825YUK+ part is unused and in its original packaging.
Return procedure for MAX6825YUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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