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Analog Devices Inc./Maxim Integrated MAX6825TUK+T
- Part No.:
- MAX6825TUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6825TUK+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:17,405
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Product details
Overview
MAX6825TUK+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 3.08V 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 MAX6825TUK+T datasheet, MAX6825TUK+T pinout, MAX6825TUK+T application, or MAX6825TUK+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset timing, true supply-current specs across temperature, and validated alternative options for critical µP monitoring designs.
Technical Context
The MAX6825TUK+T integrates three core functions: precise VCC monitoring against a factory-trimmed 3.08V threshold (±3% over –40°C to +125°C), debounced manual reset input with internal 50kΩ pullup, and dual independent push-pull reset outputs - one active-low (RESET), one active-high (RESET). No watchdog timer is included, distinguishing it from MAX6821–MAX6824 variants.
Reset assertion occurs on VCC fall below threshold, MR low, or power-on; both outputs remain asserted for ≥140ms after VCC recovery or MR release. Output drive strength is specified up to 3.2mA sink (RESET) and 800µA source (RESET), with valid logic states guaranteed down to VCC = +1.0V - enabling robust operation in deep-brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3% (T suffix); ensures reliable detection of 3.3V rail brownout before µP malfunction |
| Reset Timeout Period | 140ms min; holds µP in reset long enough for stable clock and supply settling |
| VCC Operating Range | +1.2V to +5.5V (–40°C to +125°C); supports single-supply operation in battery-backed systems |
| Supply Current | 20µA max at +3.6V, –40°C to +125°C; enables multi-year operation in coin-cell–powered devices |
| Reset Output Drive | RESET: 0.3V max @ 3.2mA sink; RESET: 0.8×VCC min @ 800µA source; drives standard CMOS inputs directly |
| MR Input Logic | Active-low, 0.3×VCC VIH/0.7×VCC VIL; compatible with 1.8V–5V logic families without level shifters |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, land pattern 91-0174), RoHS-compliant, surface-mountable with 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output; drives low during reset; sinks up to 3.2mA; no external pullup required |
| 2 | GND | Ground reference for all internal circuits and reset timing; must be low-impedance |
| 3 | MR (manual reset) | Active-low input with internal 50kΩ pullup to VCC; accepts CMOS logic; 1µs minimum pulse width |
| 4 | WDI | Not connected internally in MAX6825; left floating or tied to GND/VCC; watchdog function disabled |
| 5 | VCC | Supply and monitored voltage input; powers device and sets reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Simultaneous active-low and active-high signals eliminate need for external inverters in mixed-logic systems |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic µP reset even during severe brownout or battery depletion down to 1.0V |
| No external components required | Integrates voltage reference, timer, pullup resistor, and output drivers - reduces BOM count and PCB area |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - improves system resilience in noisy environments |
| Factory-trimmed 3.08V threshold | Eliminates need for external resistor dividers; achieves ±3% accuracy over full temperature range |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld medical monitors powered by single Li-ion cell with dynamic discharge curve. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; asserts dual reset signals to ARM Cortex-M0 MCU and display controller during voltage sag. Use Value: Prevents firmware corruption when battery drops below 3.1V; 140ms timeout ensures clean boot after recharge. |
Use Scenario: Industrial PLC module with isolated I/O and real-time Ethernet interface. IC Role / Device Role / Timing Role: Supervises main 3.3V domain; provides synchronized active-low and active-high reset to µP and FPGA configuration logic. Use Value: Eliminates race conditions between µP and FPGA startup; dual outputs avoid level-shifter delays in high-speed control loops. |
| Set-Top Boxes | Critical µP Monitoring |
Use Scenario: Consumer STB with HDMI, tuner, and USB peripherals sharing a 3.3V rail. IC Role / Device Role / Timing Role: Detects 3.08V brownout on shared rail; triggers reset to SoC and audio codec simultaneously. Use Value: Prevents audio dropouts and HDMI handshake failures caused by marginal rail collapse during peak load. |
Use Scenario: Railway signaling controller requiring fail-safe µP restart on any supply anomaly. IC Role / Device Role / Timing Role: Primary supervisor for safety-critical ARM-based controller; MR tied to emergency stop circuit. Use Value: Dual-reset architecture enables hardware-level redundancy verification; VCC = +1.0V operation covers worst-case capacitor discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823TUK+T | Same 3.08V threshold, same package, but only single active-low RESET output; includes WDI pin (watchdog enabled) | Requires external inverter for active-high reset signal; suitable where watchdog supervision is mandatory | Select MAX6823TUK+T if watchdog timer functionality is required and active-high reset can be generated externally. |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), 350ms reset timeout, open-drain RESET only, no dual-output capability, no MR input | Lacks manual reset and active-high output; requires external pullup and level translation for mixed-logic systems | Choose TPS3808G30DBVR only for cost-sensitive, non-manual-reset applications where longer timeout is acceptable and single-output suffices. |
Compared with MAX6825TUK+T, MAX6823TUK+T adds watchdog capability but sacrifices the active-high RESET output, while TPS3808G30DBVR offers tighter threshold tolerance but eliminates manual reset and dual-output flexibility - making MAX6825TUK+T uniquely suited for space-constrained, dual-logic-domain µP systems requiring field-serviceable reset.
Availability
MAX6825TUK+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, set-top boxes, and critical µP monitoring applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6825TUK+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 and mixed-signal ICs for industrial, communications, computing, and consumer applications.
The MAX6821–MAX6825 family delivers compact, low-power µP supervisory solutions optimized for battery-operated and space-constrained embedded systems requiring deterministic reset behavior and minimal external components.
FAQ
What is the reset threshold voltage of MAX6825TUK+T?
The MAX6825TUK+T has a factory-trimmed reset threshold of 3.08V, with ±3% tolerance over the full operating temperature range (–40°C to +125°C). This value is fixed by the "T" suffix and is designed specifically to monitor 3.3V power rails during brownout conditions. The threshold is referenced internally to VCC and remains stable across voltage and temperature variations, ensuring consistent µP reset behavior in the MAX6825TUK+T.
Does MAX6825TUK+T include a watchdog timer function?
No, the MAX6825TUK+T does not include a watchdog timer. Unlike MAX6821–MAX6824 variants, the WDI pin in MAX6825TUK+T is not connected internally and serves no functional purpose - it must be left unconnected, tied to GND, or tied to VCC. Watchdog supervision is intentionally omitted in this variant to simplify design where software execution monitoring is handled externally or not required, distinguishing MAX6825TUK+T from other members of the family.
What are the electrical characteristics of the two reset outputs in MAX6825TUK+T?
The MAX6825TUK+T provides two independent push-pull reset outputs: RESET (active-low) and RESET (active-high). RESET sinks up to 3.2mA with VOL ≤ 0.4V at VCC ≥ 4.25V; RESET sources up to 800µA with VOH ≥ 0.8×VCC at VCC ≥ 4.75V. Both outputs remain valid down to VCC = +1.0V, enabling reliable reset assertion even during deep brownout - a key differentiator of the MAX6825TUK+T in low-voltage applications.
Can the manual reset input (MR) of MAX6825TUK+T be left unconnected?
Yes, the MR pin of MAX6825TUK+T features an internal 50kΩ pullup resistor to VCC, so it may be left unconnected if manual reset functionality is not needed. When unused, MR floats high and does not affect reset behavior. If external control is required, a momentary switch to GND or CMOS logic driver suffices - no external pullup or debounce circuitry is necessary due to built-in filtering, simplifying implementation in the MAX6825TUK+T.
What package type and footprint does MAX6825TUK+T use?
The MAX6825TUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 91-0174), with 0.95mm lead pitch and RoHS-compliant +T suffix indicating lead-free finish. This compact surface-mount package measures 2.9mm × 1.6mm × 1.1mm and is compatible with standard reflow processes. Its small size and thermal performance make it ideal for dense PCB layouts in portable and embedded systems using the MAX6825TUK+T.
MAX6825TUK+T 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:
- 3.08V
- 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
MAX6825TUK+T FAQ
1.How can I place an order for MAX6825TUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6825TUK+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 MAX6825TUK+T reliable?
The price and inventory of MAX6825TUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6825TUK+T is usually 5 days.
3.What payment methods are accepted for MAX6825TUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6825TUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6825TUK+T?
MAX6825TUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6825TUK+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 MAX6825TUK+T?
For technical support, including MAX6825TUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6825TUK+T requirements.
6.How does Aetrix verify that MAX6825TUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6825TUK+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 MAX6825TUK+T meets industry standards.
7.What is the process for return or replacement of MAX6825TUK+T?
All MAX6825TUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6825TUK+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 MAX6825TUK+T part is unused and in its original packaging.
Return procedure for MAX6825TUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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