My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6823RUK+T
- Part No.:
- MAX6823RUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6823RUK+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6823RUK+T from Maxim Integrated is a low-voltage microprocessor supervisory IC in SOT23-5 package, featuring push-pull active-low RESET output, 2.63V reset threshold (R suffix), 140ms minimum reset timeout, 1.6s watchdog timer, and debounced manual reset input. It monitors VCC for brownout detection and asserts reset during power-up, power-down, or software faults in embedded controllers and portable equipment.
For engineers reviewing the MAX6823RUK+T datasheet, MAX6823RUK+T pinout, MAX6823RUK+T application, or MAX6823RUK+T equivalent, this page delivers verified functional identity, exact pin roles, real-world timing behavior, voltage threshold accuracy across temperature, and validated alternatives for µP reset and watchdog supervision in space-constrained industrial and battery-powered designs.
Technical Context
The MAX6823RUK+T implements a precision bandgap-based voltage monitor with ±1.5% threshold accuracy over –40°C to +125°C, coupled to an internal RC-based watchdog timer that triggers reset if WDI remains static beyond 1.6s (min 1.12s, max 2.4s). Its push-pull RESET output drives low at VCC < 2.63V and holds asserted for ≥140ms after VCC recovers above threshold.
It integrates a 50kΩ internal MR pullup, accepts CMOS-compatible MR/WDI inputs, guarantees valid reset assertion down to VCC = +1.0V, and rejects negative VCC transients ≤20µs when overdrive is ≤100mV - enabling robust operation in noisy or dynamically loaded systems without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% (R suffix); precise brownout detection for 2.7V–3.6V logic domains |
| Reset Timeout Period | 140ms min (100ms–320ms over temp); ensures µP completes power stabilization before release |
| Watchdog Timeout | 1.6s nominal (1.12s–2.4s over temp); detects firmware hangs in real-time control loops |
| Supply Voltage Range | +1.2V to +5.5V (–40°C to +125°C); supports single-cell Li-ion, 1.8V/2.5V/3.3V/5V rails |
| RESET Output Type | Push-pull active-low; eliminates external pullup, drives directly into µP reset pin |
| MR Input Logic | Active-low with 50kΩ internal pullup; enables momentary switch interface without external components |
| Operating Temp | –40°C to +125°C; qualified for automotive under-hood and industrial edge nodes |
Pinout & Package
MAX6823RUK+T is housed in a RoHS-compliant 5-pin SOT23-5 package (U5-1 outline, 91-0174 land pattern), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts low on VCC drop, MR low, or watchdog timeout |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (50kΩ); debounced by design |
| 4 | WDI | Watchdog input; toggling within 1.6s prevents reset; left floating disables watchdog |
| 5 | VCC | Supply and monitored voltage rail; reset threshold referenced to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = +1.0V | Ensures reliable reset assertion even during deep brownout or ultra-low-power wake-up sequences |
| No external components required | Integrates pullup resistor, timing RC, voltage reference, and watchdog oscillator - reduces BOM count and layout area |
| Immunity to short negative VCC transients | Rejects ≤20µs glitches below threshold by ≥100mV - avoids spurious resets in electrically noisy environments |
| 140ms min reset timeout with temperature compensation | Prevents premature µP release during slow-ramp power supplies or capacitive load discharge |
| Five-voltage monitoring range (+1.8V to +5.0V) | Single-family coverage for legacy 5V, modern 3.3V/2.5V/1.8V, and low-power 2.1V–2.75V systems |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and firmware crash recovery in cable/satellite STBs with multi-rail power supplies. IC Role / Device Role / Timing Role: Supervises 3.3V main logic rail and asserts active-low RESET to ARM-based SoC during brownout or watchdog timeout. Use Value: Prevents corrupted channel tuning or HDMI handshake failure by enforcing clean cold boot after fault detection. | Use Scenario: Reliable startup and runtime monitoring in HVAC, PLC, or motor drive controllers. IC Role / Device Role / Timing Role: Monitors 2.5V or 3.3V MCU supply; MR pin connected to front-panel reset button; WDI fed by timer ISR. Use Value: Guarantees deterministic recovery from lockup without requiring service technician intervention. |
| Portable/Battery-Powered Equipment | Critical µP Monitoring |
Use Scenario: Long-life battery operation in handheld test instruments or medical sensors. IC Role / Device Role / Timing Role: Tracks declining Li-ion voltage (2.7V–3.6V range); uses 2.63V threshold (R suffix) to trigger graceful shutdown before cutoff. Use Value: Extends usable battery capacity by avoiding premature resets while ensuring data integrity on last save. | Use Scenario: Fail-safe operation in intelligent power meters or industrial gateways where µP failure must be detected within 2 seconds. IC Role / Device Role / Timing Role: Provides independent watchdog supervision of safety-critical firmware; RESET output tied to hardware reset chain. Use Value: Meets IEC 61508 SIL-2 requirements for self-checking reset generation with <2.4s max watchdog timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822RUK+T | Same 2.63V threshold and timing specs, but open-drain RESET output | Requires external pullup; needed for bidirectional µP reset pins (e.g., Motorola 68HC11) | Select when interfacing with µPs mandating open-drain reset or shared reset bus |
| TPS3808G26DBVR | 2.63V threshold, 200ms reset timeout, no manual reset input, lower quiescent current (1.1µA) | Lacks MR and WDI; suited for simple power-on reset only, not full watchdog supervision | Choose for cost-sensitive, low-power applications where manual reset and watchdog are unnecessary |
Compared with MAX6823RUK+T, MAX6822RUK+T offers identical supervision functionality but requires external pullup for reset signaling, while TPS3808G26DBVR reduces complexity and current draw at the expense of losing manual reset and watchdog features - making MAX6823RUK+T the optimal choice when full-feature µP supervision in minimal footprint is required.
Availability
MAX6823RUK+T is available at Aetrix Electronics and suitable for set-top boxes, embedded controllers, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6823RUK+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, automotive, communications, and computing markets.
The MAX6821–MAX6825 family was engineered specifically for space-constrained microprocessor systems needing integrated voltage monitoring, watchdog supervision, and manual reset - delivering high reliability in SOT23-5 with no external components.
FAQ
What is the exact reset threshold voltage of MAX6823RUK+T and how stable is it over temperature?
The MAX6823RUK+T has a factory-trimmed reset threshold of 2.63V with ±1.5% accuracy over –40°C to +125°C. Its temperature coefficient is 60ppm/°C, resulting in ≤10mV drift across the full range - sufficient for stable brownout detection in 2.7V–3.6V systems without recalibration.
Does MAX6823RUK+T require external components to operate as a complete supervisory circuit?
No. The MAX6823RUK+T operates autonomously with no external components: it includes an internal 50kΩ MR pullup, precision voltage reference, RC-based watchdog timer, and push-pull RESET driver. Only VCC, GND, MR (optional), and WDI (optional) connections are needed for full functionality.
How does the watchdog timer in MAX6823RUK+T respond to firmware stalls, and what is its timeout tolerance?
The MAX6823RUK+T watchdog timer triggers reset if WDI remains static for >1.6s (nominal), with min/max bounds of 1.12s and 2.4s over temperature. It clears on any WDI edge (rising or falling), enabling robust detection of infinite loops - unlike simple pulse-based watchdogs that may miss stuck states.
Can MAX6823RUK+T assert reset when VCC drops below 1.8V, and down to what supply level does it remain functional?
Yes. The MAX6823RUK+T monitors VCC down to +1.2V (operating range) and guarantees correct RESET assertion even when VCC falls to +1.0V - enabling reliable reset generation during deep brownout conditions common in battery-powered systems nearing end-of-life.
What is the function of Pin 3 (MR) on MAX6823RUK+T, and how should it be interfaced in a typical design?
Pin 3 is the active-low Manual Reset input. It features an internal 50kΩ pullup to VCC, so it can be left unconnected if unused. For user-initiated reset, connect a normally open momentary switch between MR and GND - no external debounce circuitry is required due to built-in filtering.
MAX6823RUK+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:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- 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
MAX6823RUK+T FAQ
1.How can I place an order for MAX6823RUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6823RUK+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 MAX6823RUK+T reliable?
The price and inventory of MAX6823RUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6823RUK+T is usually 5 days.
3.What payment methods are accepted for MAX6823RUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6823RUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6823RUK+T?
MAX6823RUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6823RUK+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 MAX6823RUK+T?
For technical support, including MAX6823RUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6823RUK+T requirements.
6.How does Aetrix verify that MAX6823RUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6823RUK+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 MAX6823RUK+T meets industry standards.
7.What is the process for return or replacement of MAX6823RUK+T?
All MAX6823RUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6823RUK+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 MAX6823RUK+T part is unused and in its original packaging.
Return procedure for MAX6823RUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6823RUK+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…
