My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6825RUK+T
- Part No.:
- MAX6825RUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6825RUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6825RUK+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 functionality. 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 portable/battery-powered equipment and embedded controllers for reliable power-on reset and fault recovery.
For engineers reviewing the MAX6825RUK+T datasheet, MAX6825RUK+T pinout, MAX6825RUK+T application, or MAX6825RUK+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Maxim's official electrical characteristics and functional descriptions for the MAX6825 variant.
Technical Context
The MAX6825RUK+T implements dual-reset architecture: one active-low push-pull RESET and one active-high push-pull RESET, both asserted simultaneously during VCC drop below 3.08V, manual reset trigger, or watchdog timeout. Its watchdog timer has a nominal 1.6s timeout period and clears on any WDI edge, supporting robust software execution monitoring.
It features internal 50kΩ MR pullup, glitch rejection of 100ns, and MR-to-reset delay of 200ns. Reset timeout is guaranteed ≥140ms over –40°C to +125°C, and device operates with supply current as low as 5µA (typ) at +3.6V and –40°C to +85°C - enabling ultra-low-power battery operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3% (R suffix); ensures reliable detection of 3.3V supply brownout before µP malfunction |
| Reset Timeout Period | 140ms min (–40°C to +85°C); guarantees sufficient hold time for full µP initialization |
| Watchdog Timeout | 1.6s nominal (–40°C to +85°C); provides adequate window to detect firmware hangs in embedded systems |
| VCC Operating Range | +1.2V to +5.5V (–40°C to +125°C); supports wide-input legacy and low-voltage modern µPs |
| RESET Output Type | Dual push-pull: active-low RESET and active-high RESET; eliminates external pull resistors and enables bidirectional reset control |
| MR Input Logic | Active-low with 50kΩ internal pullup; allows direct switch-to-GND connection without external components |
| Supply Current | 12µA typ at +3.6V (–40°C to +85°C); enables multi-year battery life in portable instrumentation |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline), footprint compatible with industry-standard 0.95mm pitch land pattern (91-0174). RoHS-compliant lead-free packaging indicated by "+T" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during fault; drives µP reset pin directly without pullup |
| 2 | GND | Ground reference for all internal comparators, timers, and I/O; must be low-impedance |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup; debounced internally, no external RC needed |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; left unconnected disables watchdog |
| 5 | VCC | Supply and monitored voltage input; powers circuitry and sets reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull RESET outputs | Enables simultaneous active-low and active-high reset signaling to mixed-logic systems without level-shifting or external drivers |
| Guaranteed reset validity to VCC = +1.0V | Ensures deterministic reset behavior during deep brownout or battery depletion, critical for data integrity in portable instruments |
| No external components required | Integrates MR pullup, watchdog timing, and voltage reference - reduces BOM count and PCB area in space-constrained designs |
| 100ns MR glitch rejection | Rejects EMI-induced noise on manual reset line, preventing spurious system resets in noisy industrial environments |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without false triggering - avoids unnecessary resets during switching noise events |
Applications
| Portable/Battery-Powered Equipment | Embedded Controllers |
|---|---|
Use Scenario: Handheld test meters and wireless sensor nodes operating from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and provides fail-safe reset during battery voltage sag or cold-start conditions. Use Value: Dual RESET outputs interface directly with µP and peripheral logic; 5µA quiescent current extends battery life beyond 5 years in sleep mode. |
Use Scenario: Industrial PLC modules requiring deterministic boot sequencing and runtime watchdog supervision. IC Role / Device Role / Timing Role: Monitors 3.3V FPGA configuration supply and asserts synchronized reset to CPU and FPGA upon undervoltage or software hang. Use Value: 140ms minimum reset timeout meets ARM Cortex-M boot requirements; MR input enables field-service reset via front-panel button. |
| Intelligent Instruments | Critical µP Monitoring |
Use Scenario: Digital multimeters and oscilloscope front-ends where firmware corruption must trigger immediate hardware reset. IC Role / Device Role / Timing Role: Provides independent watchdog supervision of measurement engine µP, decoupled from main application processor. Use Value: WDI edge-triggered clearing prevents stuck-loop evasion; 1.6s timeout balances responsiveness and noise immunity. |
Use Scenario: Medical diagnostic devices where µP failure could compromise patient safety and requires certified fail-safe response. IC Role / Device Role / Timing Role: Primary supervisory IC enforcing IEC 62304 Class C reset behavior: detects VCC faults, MR commands, and software stalls with dual-redundant RESET signaling. Use Value: Guaranteed reset assertion down to VCC = +1.0V ensures reset occurs even during catastrophic power collapse, meeting safety-critical timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6823RUK+T | Same 3.08V threshold, manual reset, and watchdog; but provides only active-low push-pull RESET (no active-high output) | Lacks dual-reset capability; requires external inverter or logic to generate active-high signal | Select when system needs only one reset polarity and board space is constrained |
| TPS3808G30DBVR | 3.0V threshold, 200ms reset timeout, open-drain RESET; no manual reset input or watchdog timer | Supports basic voltage monitoring only; cannot replace MAX6825RUK+T in watchdog or dual-reset applications | Choose only for simple power-good monitoring where MR and watchdog functions are handled elsewhere |
Compared with MAX6825RUK+T, MAX6823RUK+T omits the active-high RESET output - limiting flexibility in mixed-logic systems - while TPS3808G30DBVR lacks both manual reset and watchdog, making it unsuitable for autonomous fault recovery in portable or embedded controllers.
Availability
MAX6825RUK+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP monitoring requiring stable component supply across automotive-grade temperature range (–40°C to +125°C).
Supply support for MAX6825RUK+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 high-reliability industrial, medical, and communications systems.
The MAX6821–MAX6825 family was engineered specifically for low-voltage microprocessor supervision in space- and power-constrained applications, integrating voltage monitoring, watchdog, and manual reset in a minimal 5-pin SOT23 footprint.
FAQ
What is the reset threshold voltage for MAX6825RUK+T?
The MAX6825RUK+T has a factory-programmed reset threshold of 3.08V (±3%), corresponding to the "R" suffix in its part number. This value is guaranteed over the full operating temperature range (–40°C to +125°C) and ensures reliable detection of brownout on 3.3V supply rails. The threshold hysteresis is 2×VTH (≈6.16mV), preventing oscillation near the trip point.
Does MAX6825RUK+T include a watchdog timer?
Yes, MAX6825RUK+T includes a watchdog timer with a nominal timeout period of 1.6 seconds at +25°C, ranging from 0.80s to 2.60s over –40°C to +125°C. The timer clears on any rising or falling edge at the WDI pin and remains disabled if WDI is left unconnected or three-stated - providing flexible enablement in diverse firmware architectures.
What are the RESET output configurations supported by MAX6825RUK+T?
MAX6825RUK+T provides two independent push-pull RESET outputs: an active-low RESET and an active-high RESET. Both assert simultaneously during VCC undervoltage, MR activation, or watchdog timeout. Neither requires external pull resistors, simplifying interface with µPs that accept either polarity or require concurrent reset signaling to multiple subsystems.
Can MAX6825RUK+T operate with supply voltages below 1.8V?
Yes, MAX6825RUK+T is fully specified to operate with VCC as low as +1.2V over –40°C to +125°C, and its RESET outputs remain valid down to +1.0V. This enables use in ultra-low-voltage applications such as energy-harvesting sensors or deeply discharged battery scenarios where other supervisors would fail to assert reset reliably.
Is manual reset functionality available on MAX6825RUK+T?
Yes, MAX6825RUK+T includes an active-low manual reset input (MR) with internal 50kΩ pullup to VCC. A logic-low pulse ≥1µs on MR forces reset assertion for the full timeout period (≥140ms), and the input rejects glitches <100ns. Leaving MR unconnected or tied to VCC disables manual reset, requiring no external components.
MAX6825RUK+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6825RUK+T FAQ
1.How can I place an order for MAX6825RUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6825RUK+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 MAX6825RUK+T reliable?
The price and inventory of MAX6825RUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6825RUK+T is usually 5 days.
3.What payment methods are accepted for MAX6825RUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6825RUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6825RUK+T?
MAX6825RUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6825RUK+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 MAX6825RUK+T?
For technical support, including MAX6825RUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6825RUK+T requirements.
6.How does Aetrix verify that MAX6825RUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6825RUK+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 MAX6825RUK+T meets industry standards.
7.What is the process for return or replacement of MAX6825RUK+T?
All MAX6825RUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6825RUK+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 MAX6825RUK+T part is unused and in its original packaging.
Return procedure for MAX6825RUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6825RUK+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
