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Analog Devices Inc./Maxim Integrated MAX6825SUK+T
- Part No.:
- MAX6825SUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6825SUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,858
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Product details
Overview
MAX6825SUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in 5-pin SOT23 package, combining voltage monitoring (3.08V threshold), manual reset input, and watchdog timer functions. It asserts active-low and active-high push-pull RESET outputs during VCC brownout, MR assertion, or watchdog timeout, with guaranteed reset validity down to VCC = +1.0V. Used in critical µP monitoring for portable/battery-powered equipment and embedded controllers.
For engineers reviewing the MAX6825SUK+T datasheet, MAX6825SUK+T pinout, MAX6825SUK+T application, or MAX6825SUK+T equivalent, this page delivers verified functional identity, exact reset threshold (3.08V), dual push-pull RESET outputs, 140ms min reset timeout, and manual reset support - all confirmed for the MAX6825 variant per Maxim's Selector Guide and Electrical Characteristics table.
Technical Context
The MAX6825SUK+T implements a dual-output supervisory architecture: one active-low and one active-high push-pull RESET signal, both asserted synchronously during VCC drop below 3.08V, MR low, or watchdog timeout. Its internal 140ms reset timeout timer ensures reliable power-up sequencing, while the manual reset input includes a 50kΩ internal pullup and 200ns MR-to-reset delay.
Unlike MAX6821–MAX6824, the MAX6825 omits the WDI pin function and instead dedicates Pin 4 to RESET (active-high), enabling simultaneous assertion of complementary reset signals without external logic. Reset output states are guaranteed valid over full -40°C to +125°C operating range and down to VCC = +1.0V, supporting ultra-low-power brownout detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±30mV (VCC falling); enables precise brownout detection for 3.3V systems |
| Reset Timeout Period | 140ms (min); ensures stable µP initialization after power recovery |
| Supply Voltage Range | +1.2V to +5.5V (–40°C to +125°C); supports operation during deep brownout |
| RESET Outputs | Active-low and active-high push-pull; eliminates need for external inverters or pullups |
| Manual Reset Input | MR with 50kΩ internal pullup; accepts CMOS levels; no external debounce required |
| Quiescent Current | 20µA max at +3.6V, –40°C to +125°C; minimizes battery drain in portable systems |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive-adjacent embedded use |
Pinout & Package
MAX6825SUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 91-0174), with gull-wing leads and RoHS-compliant lead-free finish (+T suffix). The package measures 2.9mm × 1.6mm × 1.1mm and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output; drives low during fault conditions; sinks 1.2mA at VCC ≥3.15V |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; 200ns propagation delay |
| 4 | RESET (active-high) | Push-pull output; drives high during fault conditions; sources 500µA at VCC ≥2.55V |
| 5 | VCC | Supply input and monitored voltage source; reset threshold referenced to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary RESET outputs | Simultaneous active-low and active-high push-pull signals eliminate external level-shifting or inversion |
| Guaranteed reset validity to VCC = +1.0V | Ensures fail-safe reset assertion even during severe brownout or battery sag |
| 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 robustness in noisy environments |
| 140ms minimum reset timeout | Meets JEDEC JESD8-12E power-up timing requirements for modern µPs and SoCs |
Applications
| Set-Top Boxes | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power management during HDMI hot-plug events and firmware updates. IC Role / Device Role / Timing Role: Supervises 3.3V AVDD rail and triggers synchronized reset of main SoC and audio codec. Use Value: Prevents corrupted firmware writes by holding SoC in reset until 3.3V stabilizes above 3.08V for ≥140ms. |
Use Scenario: Deep-sleep wake-up and low-battery shutdown in handheld medical monitors. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding MCU; asserts dual RESET to halt processor and enable safe state save before brownout. Use Value: Guaranteed reset operation down to VCC = +1.0V allows detection of battery voltage collapse earlier than µP's internal brownout detector. |
| Embedded Controllers | Critical µP Monitoring |
Use Scenario: Industrial PLC I/O module with isolated power rails and watchdog-reliant firmware. IC Role / Device Role / Timing Role: Provides independent reset supervision for ARM Cortex-M4 core, decoupled from power supply supervisor IC. Use Value: Dual push-pull RESET outputs interface directly with both active-low and active-high reset domains on same board without level translators. |
Use Scenario: Fault-tolerant reset coordination in redundant flight control computers. IC Role / Device Role / Timing Role: Acts as primary brownout detector with manual reset override via front-panel switch (MR). Use Value: Internal 50kΩ MR pullup eliminates external resistor; debounced MR input ensures single, clean reset pulse even with mechanical switch bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823SUK+T | Single active-low push-pull RESET; includes WDI pin; no active-high RESET output | Lacks dual RESET capability; requires external inverter or µP with bidirectional reset I/O | Select when only one reset polarity is needed and watchdog monitoring is mandatory |
| TPS3808G33DBVR | Single open-drain RESET; 3.3V fixed threshold; no manual reset input; 200ms timeout | Requires external pullup; no MR functionality; not pin-compatible; different package (SOT23-6) | Select for cost-sensitive 3.3V-only applications where manual reset and dual outputs are unnecessary |
Compared with MAX6825SUK+T, MAX6823SUK+T provides watchdog capability but sacrifices the active-high RESET output, while TPS3808G33DBVR offers tighter threshold tolerance but lacks MR and dual outputs - making MAX6825SUK+T uniquely suited for designs requiring coordinated active-low/active-high reset signaling with manual override.
Availability
MAX6825SUK+T is available at Aetrix Electronics and suitable for critical µP monitoring, portable/battery-powered equipment, and embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6825SUK+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 applications.
The MAX6821–MAX6825 family was engineered specifically for low-voltage microprocessor supervision in space-constrained, battery-sensitive, and thermally demanding systems - emphasizing guaranteed reset validity at ultra-low VCC and integrated manual reset functionality.
FAQ
What is the exact reset threshold voltage for MAX6825SUK+T?
The MAX6825SUK+T has a factory-programmed reset threshold of 3.08V (±30mV) for VCC falling, as defined by the "T" suffix in its part number. This value is specified over the full –40°C to +125°C temperature range and guarantees reliable brownout detection for 3.3V nominal systems. The threshold exhibits 60ppm/°C temperature coefficient and 2×VTH hysteresis to prevent chatter near the trip point.
Does MAX6825SUK+T include a watchdog timer function?
No, the MAX6825SUK+T does not include a watchdog timer. Per Maxim's Selector Guide and Pin Description table, the MAX6825 variant replaces the WDI pin (Pin 4 on MAX6821–MAX6824) with a second push-pull RESET output (active-high). Watchdog functionality is present only in MAX6821–MAX6824; MAX6825 prioritizes dual complementary reset signaling over watchdog monitoring.
What are the electrical characteristics of the two RESET outputs on MAX6825SUK+T?
The MAX6825SUK+T provides two independent push-pull outputs: Pin 1 (RESET, active-low) sinks up to 1.2mA at VCC ≥3.15V with VOL ≤0.3V, and Pin 4 (RESET, active-high) sources up to 500µA at VCC ≥2.55V with VOH ≥0.8×VCC. Both outputs remain valid and drive correctly down to VCC = +1.0V, ensuring robust reset assertion during deep brownout conditions.
How is the manual reset input (MR) implemented on MAX6825SUK+T?
The MR input on MAX6825SUK+T is an active-low, CMOS-compatible pin (Pin 3) with an internal 50kΩ pullup resistor to VCC. A logic-low pulse ≥1µs wide asserts reset for the full 140ms timeout period, even after MR returns high. Glitch rejection is 100ns, and MR-to-reset propagation delay is 200ns. Leaving MR unconnected defaults to inactive (reset not asserted) due to the internal pullup.
Is MAX6825SUK+T compatible with lead-free PCB assembly processes?
Yes, MAX6825SUK+T is supplied in lead(Pb)-free packaging, as indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and supports standard Pb-free reflow profiles per JEDEC J-STD-020. The SOT23-5 package (outline U5-1) is rated for peak reflow temperatures up to +260°C, and the device undergoes 100% solderability testing to ensure compatibility with automated assembly lines.
MAX6825SUK+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6825SUK+T FAQ
1.How can I place an order for MAX6825SUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6825SUK+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 MAX6825SUK+T reliable?
The price and inventory of MAX6825SUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6825SUK+T is usually 5 days.
3.What payment methods are accepted for MAX6825SUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6825SUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6825SUK+T?
MAX6825SUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6825SUK+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 MAX6825SUK+T?
For technical support, including MAX6825SUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6825SUK+T requirements.
6.How does Aetrix verify that MAX6825SUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6825SUK+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 MAX6825SUK+T meets industry standards.
7.What is the process for return or replacement of MAX6825SUK+T?
All MAX6825SUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6825SUK+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 MAX6825SUK+T part is unused and in its original packaging.
Return procedure for MAX6825SUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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