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Analog Devices Inc./Maxim Integrated MAX6823YUK+T
- Part No.:
- MAX6823YUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6823YUK+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,709
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Product details
Overview
MAX6823YUK+T from Maxim Integrated is a low-voltage microprocessor supervisory circuit in a 5-pin SOT23 package, featuring push-pull active-low RESET output, manual reset input (MR), and 1.6s watchdog timer. It monitors +2.19V supply with ±3% threshold accuracy over –40°C to +125°C, asserts reset for ≥140ms after VCC recovery, and guarantees valid reset operation down to VCC = +1.0V. It is used in critical µP monitoring for embedded controllers and portable equipment.
For engineers reviewing the MAX6823YUK+T datasheet, MAX6823YUK+T pinout, MAX6823YUK+T application, or MAX6823YUK+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset timing behavior, true watchdog timeout specification, and validated alternative options for voltage-monitoring supervisory design.
Technical Context
The MAX6823YUK+T implements a precision bandgap-based voltage monitor with 60ppm/°C temperature coefficient and 2×VTH hysteresis, ensuring stable reset assertion during brownout conditions. Its internal 140ms minimum reset timeout timer activates on VCC fall below 2.19V, MR low, or watchdog timeout - all triggering identical reset pulse duration and output state transitions.
It integrates a glitch-immune manual reset input with 50kΩ internal pullup and 100ns noise rejection, plus a watchdog input (WDI) that detects edges within 50ns and clears the 1.6s timer on any transition. The push-pull active-low RESET output drives up to 3.2mA sink at VCC ≥ 4.25V while maintaining VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | +2.19V (±3% over –40°C to +125°C); ensures reliable power-on reset for +2.2V systems |
| Reset Timeout Period | 140ms min (200ms typ); holds µP in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s nominal (0.8s–2.6s over temp); provides robust software execution monitoring without false triggers |
| VCC Operating Range | +1.2V to +5.5V; enables operation during deep brownout while maintaining reset validity down to +1.0V |
| Supply Current | 25µA max at –40°C to +125°C (VCC = +3.6V); supports ultra-low-power battery-backed applications |
| RESET Output Type | Push-pull active-low; eliminates external pullup, simplifies interface to µP reset pins requiring driven low |
| MR Input Logic | Active-low with 50kΩ internal pullup; allows direct switch-to-GND connection without external components |
Pinout & Package
Package: 5-pin SOT23-5 (U5-1 outline, 21-0057 land pattern), RoHS-compliant, surface-mountable with 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during VCC undervoltage, MR activation, or watchdog timeout; sinks 3.2mA at VCC ≥ 4.25V |
| 2 | GND | Ground reference for all internal circuits and reset timing; must be low-impedance for noise immunity |
| 3 | MR (manual reset) | Active-low input with internal 50kΩ pullup; reset remains active for full timeout after MR returns high |
| 4 | WDI (watchdog input) | Edge-sensitive input; toggling within 1.6s prevents reset; unconnected disables watchdog via internal timer service |
| 5 | VCC | Supply and monitored voltage input; powers device and sets reset threshold; valid operation down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = +1.0V | Enables fail-safe reset assertion even during severe brownout, preventing µP runaway before power collapse |
| No external components required | Integrates pullup resistor on MR, precision voltage reference, timer, and push-pull driver - reduces BOM count and PCB area |
| Immunity to short negative VCC transients | Withstands ≤20µs, 100mV VCC glitches without spurious reset - avoids unnecessary system restarts in noisy environments |
| Debounced manual reset input | Internal 100ns glitch rejection and 1µs minimum pulse width tolerance eliminate need for external RC filtering |
| Watchdog edge detection (50ns) | Supports fast µP I/O toggling; enables tight software supervision without timing margin penalties |
Applications
| Set-Top Boxes | Embedded Controllers |
|---|---|
Use Scenario: Power sequencing and firmware integrity monitoring during channel switching and firmware updates. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low RESET to hold ARM-based SoC in known state until +2.2V rail stabilizes and watchdog confirms boot code execution. Use Value: Prevents corrupted channel tuning or HDMI handshake failures caused by premature µP release during 2.2V supply ramp. |
Use Scenario: Industrial PLC controller with real-time OS requiring guaranteed boot reliability after cold start or brownout recovery. IC Role / Device Role / Timing Role: Critical µP monitoring device providing 140ms minimum reset hold time and 1.6s watchdog supervision of main task scheduler. Use Value: Eliminates silent hangs by forcing hard reset if scheduler fails to toggle WDI within timeout - no external watchdog IC needed. |
| Portable/Battery-Powered Equipment | Intelligent Instruments |
Use Scenario: Handheld multimeter with Li-ion battery discharge down to 2.2V cutoff, requiring continuous µP supervision during low-VCC operation. IC Role / Device Role / Timing Role: Low-voltage supervisor monitoring +2.19V rail with reset valid to +1.0V, enabling safe shutdown sequence initiation before brownout lockup. Use Value: Guarantees clean data save and display blanking before power loss - avoids EEPROM corruption or ghost display artifacts. |
Use Scenario: Benchtop oscilloscope with FPGA-configurable front-end and ARM host processor needing coordinated reset during power-up calibration. IC Role / Device Role / Timing Role: Dual-role supervisor providing manual reset for field service and watchdog for FPGA configuration state machine monitoring. Use Value: Enables technician-initiated recalibration via MR button while ensuring FPGA bitstream load completes before ARM boot proceeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6822YUK+T | Open-drain active-low RESET output; same 2.19V threshold, 140ms timeout, and 1.6s watchdog | Requires external pullup resistor; suited for bidirectional µP reset pins (e.g., Motorola 68HC11) | Select when interfacing to µPs with shared reset bus or open-drain-compatible I/O; not drop-in for push-pull designs |
| TPS3808G18DBVR | Fixed 1.8V threshold, 200ms reset delay, no manual reset input, but includes power-good output | Lacks MR and WDI; designed for simpler power-monitoring-only use cases without software supervision | Choose when only voltage monitoring is needed and board space permits separate reset generation logic |
Compared with MAX6823YUK+T, MAX6822YUK+T offers identical monitoring and timing but requires external pullup due to open-drain output, while TPS3808G18DBVR trades manual reset and watchdog capability for tighter 1.8V threshold accuracy and power-good signaling - making it suitable only for non-watchdog, single-threshold applications.
Availability
MAX6823YUK+T is available at Aetrix Electronics and suitable for embedded controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6823YUK+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 power, sensing, and interface applications, with emphasis on high-reliability industrial and automotive solutions.
The MAX682x family targets microprocessor supervisory functions in space-constrained, low-power systems - delivering integrated voltage monitoring, watchdog, and manual reset in minimal 5-pin SOT23 footprint.
FAQ
What is the exact reset threshold voltage for MAX6823YUK+T and its tolerance over temperature?
The MAX6823YUK+T has a nominal reset threshold of +2.19V, with ±3% initial accuracy over –40°C to +125°C. Electrical Characteristics specify min/max values of 2.11V to 2.27V across full temperature range, and temperature coefficient is 60ppm/°C - meaning threshold drift is bounded and predictable in thermal cycling environments.
Does MAX6823YUK+T support manual reset functionality, and how is it implemented?
Yes, MAX6823YUK+T includes an active-low manual reset input (MR) with internal 50kΩ pullup resistor. Pulling MR to GND asserts RESET for the full 140ms timeout period, even if MR returns high earlier. This allows direct connection to a momentary switch without external components, and MR accepts CMOS-level signals or open-drain drivers.
What is the watchdog timeout behavior of MAX6823YUK+T, and how is it cleared?
The MAX6823YUK+T features a 1.6s nominal watchdog timeout (0.8s–2.6s over temperature). The internal timer clears on any rising or falling edge at the WDI pin, or when RESET is asserted (e.g., during power-up or MR activation). Leaving WDI unconnected disables the watchdog via internal periodic servicing - no external pullup/down required.
Can MAX6823YUK+T operate reliably at VCC below 1.8V, and what is the lowest valid supply voltage?
Yes, MAX6823YUK+T guarantees correct RESET output state down to VCC = +1.0V, and operates across VCC = +1.2V to +5.5V. At VCC = +1.2V, reset assertion remains valid, supply current is ≤30µA, and MR input thresholds scale with VCC (VIL = 0.3×VCC, VIH = 0.7×VCC), enabling robust function in ultra-low-voltage battery-depleted scenarios.
What package type and RoHS status does MAX6823YUK+T use?
MAX6823YUK+T uses a 5-pin SOT23-5 package (outline U5-1, land pattern 21-0057) and is RoHS-compliant. The "+T" suffix explicitly denotes lead(Pb)-free packaging per Maxim's ordering convention - confirmed in the Ordering Information table and Package Information section of the datasheet.
MAX6823YUK+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:
- 2.19V
- 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
MAX6823YUK+T FAQ
1.How can I place an order for MAX6823YUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6823YUK+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 MAX6823YUK+T reliable?
The price and inventory of MAX6823YUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6823YUK+T is usually 5 days.
3.What payment methods are accepted for MAX6823YUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6823YUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6823YUK+T?
MAX6823YUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6823YUK+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 MAX6823YUK+T?
For technical support, including MAX6823YUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6823YUK+T requirements.
6.How does Aetrix verify that MAX6823YUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6823YUK+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 MAX6823YUK+T meets industry standards.
7.What is the process for return or replacement of MAX6823YUK+T?
All MAX6823YUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6823YUK+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 MAX6823YUK+T part is unused and in its original packaging.
Return procedure for MAX6823YUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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