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Analog Devices Inc./Maxim Integrated MAX6825YUK+T
- Part No.:
- MAX6825YUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6825YUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6825YUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, featuring manual reset input (MR), dual push-pull reset outputs (RESET and RESET), and voltage monitoring at 2.19V threshold. It asserts reset during power-up, brownout, or manual trigger, with 140ms minimum timeout and guaranteed operation down to VCC = +1.0V. Used in portable/battery-powered equipment and embedded controllers for reliable µP initialization.
For engineers reviewing the MAX6825YUK+T datasheet, MAX6825YUK+T pinout, MAX6825YUK+T application, or MAX6825YUK+T equivalent, key selection criteria include its dual active-high/active-low push-pull reset outputs, 2.19V threshold accuracy over –40°C to +125°C, MR debounce capability, watchdog-free architecture, and SOT23-5 footprint compatibility with space-constrained designs.
Technical Context
The MAX6825YUK+T implements independent voltage monitoring and manual reset logic without integrated watchdog functionality-distinguishing it from MAX6821–MAX6824 variants. Its dual push-pull reset outputs provide simultaneous active-high (RESET) and active-low (RESET) signaling, enabling direct interface with µPs requiring either polarity without external level-shifting or pull-up/down components.
Voltage detection uses a precision bandgap reference with 60ppm/°C temperature coefficient and 2×VTH hysteresis, ensuring stable reset assertion across industrial temperature range. The internal 50kΩ MR pullup resistor supports CMOS-logic-compatible manual reset triggering with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V ±1.5% (VCC falling); enables precise brownout detection for 2.2V nominal supply rails |
| Reset Timeout Period | 140ms min (–40°C to +85°C); ensures µP completes power stabilization before release |
| Operating Voltage Range | +1.2V to +5.5V (–40°C to +125°C); supports ultra-low-power battery systems down to 1.2V |
| Supply Current | 20µA max at +3.6V, –40°C to +125°C; minimizes quiescent drain in always-on monitoring |
| Reset Output Drive | Push-pull RESET (VOH ≥ 0.8×VCC, VOL ≤ 0.3V) and RESET (VOH ≥ 0.8×VCC, VOL ≤ 0.3V); eliminates need for external pull resistors |
| MR Input Logic | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC; compatible with standard CMOS I/O without level translation |
| Temperature Range | –40°C to +125°C; qualified for industrial and extended-temperature embedded applications |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, land pattern 21-0057), RoHS-compliant, surface-mountable with 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; drives high during reset assertion, low otherwise; directly interfaces µP reset pins requiring active-high signal |
| 2 | GND | Ground reference for all internal circuitry and reset timing; must be connected to system ground plane for noise immunity |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (50kΩ); momentary GND connection triggers full reset sequence |
| 4 | WDI | Watchdog disable terminal; left unconnected to disable watchdog function (no internal timer activity) |
| 5 | VCC | Supply voltage and monitored rail input; powers device and sets reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Simultaneous RESET (active-high) and RESET (active-low) eliminate external inverters or pull resistors in mixed-signaling systems |
| 2.19V precision voltage monitor | Threshold tolerance ±1.5% over full temperature range ensures accurate brownout detection for 2.2V logic supplies |
| Guaranteed reset validity to VCC = +1.0V | Enables reliable reset assertion even during deep brownout or battery sag conditions below 1.2V nominal |
| Debounced manual reset input | Internal 50kΩ pullup and 100ns glitch rejection prevent false resets from switch bounce or EMI in noisy environments |
| No external components required | Integrates voltage reference, timing capacitor, and reset logic into single SOT23-5 package-reduces BOM count and PCB area |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and recovery after AC dropout or standby wake-up in digital video receivers. IC Role / Device Role / Timing Role: Monitors 3.3V and 1.8V rails; asserts synchronized RESET/RESET to initialize SoC and memory subsystems. Use Value: Prevents corrupted firmware execution during unstable power transitions using guaranteed 140ms timeout and 2.19V threshold stability. | Use Scenario: Maintaining system integrity during lithium-ion battery discharge from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Supervises 2.2V core supply; triggers reset before brownout-induced µP latch-up occurs. Use Value: Operates down to VCC = +1.0V and maintains reset state accuracy across –40°C to +125°C, critical for outdoor or automotive portable devices. |
| Embedded Controllers | Intelligent Instruments |
Use Scenario: Industrial PLC modules requiring deterministic boot behavior after field wiring faults or transient surges. IC Role / Device Role / Timing Role: Provides dual-polarity reset signaling to ARM Cortex-M µP and FPGA configuration logic. Use Value: Push-pull outputs drive both devices directly without level shifters; MR input allows field-service reset via front-panel button. | Use Scenario: Precision data loggers with real-time clocks and sensor ADCs operating on coin-cell backup. IC Role / Device Role / Timing Role: Monitors 2.2V RTC supply; asserts RESET to halt measurement cycles during voltage collapse. Use Value: 20µA max supply current extends battery life; 60ppm/°C threshold drift preserves calibration integrity over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823YUK+T | Same 2.19V threshold, SOT23-5, but features open-drain RESET and WDI-enabled watchdog (1.6s timeout) | Requires external pull-up for RESET; suitable where watchdog supervision of firmware execution is mandatory | Select MAX6823YUK+T only if watchdog timer functionality is required; MAX6825YUK+T avoids WDI routing and associated software overhead |
| TPS3808G18DBVR | 2.18V threshold, 200ms reset timeout, single active-low open-drain RESET, no RESET output, no MR input | Lacks manual reset and dual-reset capability; requires external pull-up and separate reset polarity handling | Choose TPS3808G18DBVR for cost-sensitive, single-output applications without manual reset needs; MAX6825YUK+T provides greater flexibility in complex reset architectures |
Compared with MAX6823YUK+T, MAX6825YUK+T removes watchdog dependency and adds active-high RESET-simplifying firmware and reducing board routing complexity. Against TPS3808G18DBVR, MAX6825YUK+T delivers dual-reset polarity and MR support in identical SOT23-5 footprint, enabling drop-in upgrade for enhanced system control.
Availability
MAX6825YUK+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, and set-top boxes requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6825YUK+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, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX682x family targets space-constrained µP-based systems needing reliable, low-quiescent-power voltage supervision with flexible reset signaling-specifically addressing design challenges in battery-operated and thermally demanding embedded applications.
FAQ
What is the reset threshold voltage of the MAX6825YUK+T?
The MAX6825YUK+T has a factory-trimmed reset threshold of 2.19V (±1.5%) for VCC falling conditions, validated across –40°C to +125°C. This value corresponds to the 'Y' suffix in the part number and is specified in the Threshold Suffix Guide. The device guarantees correct reset assertion down to VCC = +1.0V, making it suitable for brownout detection in low-voltage battery systems. The threshold exhibits 60ppm/°C temperature coefficient and 2×VTH hysteresis to prevent chatter near trip point.
Does the MAX6825YUK+T include a watchdog timer?
No, the MAX6825YUK+T does not include a functional watchdog timer. Unlike MAX6821–MAX6824 variants, its WDI pin is reserved for watchdog disable-leaving it unconnected disables the feature entirely. The MAX6825YUK+T focuses exclusively on voltage monitoring and manual reset, with dual push-pull RESET/RESET outputs. This architecture eliminates watchdog-related firmware requirements and simplifies system design where code-execution supervision is handled externally or not needed.
How are the RESET and RESET outputs configured on the MAX6825YUK+T?
The MAX6825YUK+T provides two independent push-pull reset outputs: RESET is active-high (drives high during reset assertion), and RESET is active-low (drives low during reset assertion). Both outputs share the same 140ms minimum timeout period and are guaranteed to operate correctly down to VCC = +1.0V. Their VOH ≥ 0.8×VCC and VOL ≤ 0.3V specifications allow direct interfacing with µPs requiring either polarity without external pull resistors or level translators-reducing component count and PCB area in compact designs.
What is the function of the MR pin on the MAX6825YUK+T?
The MR (Manual Reset) pin on the MAX6825YUK+T is an active-low input with internal 50kΩ pullup to VCC. Pulling MR low initiates a full reset cycle: both RESET and RESET assert simultaneously for the 140ms timeout period, regardless of VCC level. The pin rejects glitches <100ns and supports CMOS logic levels (VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC). When unused, MR may be left floating or tied to VCC; no external components are required for basic operation, simplifying front-panel reset button integration.
What package type and footprint does the MAX6825YUK+T use?
The MAX6825YUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057), measuring 2.9mm × 1.6mm × 1.1mm with 0.95mm pin pitch. It is RoHS-compliant (indicated by '+T' suffix) and designed for reflow soldering. The pinout is standardized across the MAX682x family: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR, Pin 4 = WDI (no-connect for MAX6825YUK+T), Pin 5 = VCC. This footprint enables direct replacement with other MAX682x variants when redesigning for different threshold or feature sets.
MAX6825YUK+T 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:
- 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+T FAQ
1.How can I place an order for MAX6825YUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6825YUK+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 MAX6825YUK+T reliable?
The price and inventory of MAX6825YUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6825YUK+T is usually 5 days.
3.What payment methods are accepted for MAX6825YUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6825YUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6825YUK+T?
MAX6825YUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6825YUK+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 MAX6825YUK+T?
For technical support, including MAX6825YUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6825YUK+T requirements.
6.How does Aetrix verify that MAX6825YUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6825YUK+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 MAX6825YUK+T meets industry standards.
7.What is the process for return or replacement of MAX6825YUK+T?
All MAX6825YUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6825YUK+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 MAX6825YUK+T part is unused and in its original packaging.
Return procedure for MAX6825YUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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