My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6323DUT29
- Part No.:
- MAX6323DUT29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323DUT29.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,198
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6323DUT29 from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, precision reset threshold of 2.93V ±2.5%, push-pull active-low RESET output, and guaranteed operation down to VCC = +1.2V. It monitors power supply integrity and processor activity in automotive engine control units requiring fail-safe boot sequencing and runtime fault detection.
For engineers reviewing the MAX6323DUT29 datasheet, MAX6323DUT29 pinout, MAX6323DUT29 application, or MAX6323DUT29 equivalent, key selection criteria include its factory-trimmed 15ms fast / 10s slow watchdog timeout window (D-suffix), 2.85V–3.00V reset threshold range, 6-pin SOT23 package, and AEC-Q100-qualified variants for automotive use.
Technical Context
The MAX6323DUT29 implements a dual-window watchdog architecture: it triggers WDPO on WDI falling edges occurring either faster than 15ms (tWD1 min) or slower than 10s (tWD2 max). Its internal reset comparator guarantees valid RESET assertion down to VCC = +1.2V, enabling reliable brownout detection during deep power-down transitions.
RESET is push-pull with VOH ≥ 0.8×VCC (ISOURCE = 500μA) and VOL ≤ 0.4V (ISINK = 1.2mA), while WDPO is open-drain with 1ms typ pulse width upon fault detection. The MR input features internal 50–85kΩ pullup, 1μs minimum pulse width, and 100ns glitch immunity - eliminating external debounce components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% (nominal 2.85V–3.00V range); ensures accurate power-on/brownout detection for +3.3V systems. |
| Watchdog Fast Timeout | 15ms (min); detects premature or stuck WDI pulses before system enters unsafe state. |
| Watchdog Slow Timeout | 10s (max); identifies prolonged processor hang or code lockup in safety-critical loops. |
| Supply Current | 23µA typ at VCC = 2.5V/3.3V; enables low-power always-on monitoring in battery-backed modules. |
| Reset Timeout Delay | 100ms min after VCC rise/MR deassert; guarantees sufficient μP initialization time before release. |
| Operating Temperature | -40°C to +125°C; supports under-hood automotive and industrial embedded environments. |
| VCC Range | 1.2V to 5.5V; allows operation across wide input voltage transients without loss of reset validity. |
Pinout & Package
MAX6323DUT29 is housed in a 6-pin SOT23 package (package code U6-1, outline 21-0058), footprint-compatible with industry-standard 0.95mm pitch land pattern (90-0175).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog timer when driven low ≥1μs; no external components needed. |
| 2 GND | Ground reference | Common return path for all internal circuits; must be connected to system ground plane for noise immunity. |
| 3 WDI | Watchdog input | Falling-edge-triggered; resets internal timer; requires ≥300ns pulse width and rejects <100ns glitches. |
| 4 VCC | Supply voltage input | Power source and monitored rail; bypass with ≥500pF capacitor near pin to suppress transients. |
| 5 WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault; requires external pullup; active only when RESET is high. |
| 6 RESET | Push-pull active-low reset output | Drives μP reset pin directly; sinks 1.2mA @ 0.4V, sources 500μA @ 0.8×VCC; no pullup required. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog | Dual-threshold timing (15ms fast / 10s slow) prevents false resets from jitter while catching both stuck and stalled code paths. |
| Guaranteed reset validity | RESET remains functional down to VCC = +1.2V - critical for detecting brownout during power collapse in automotive ECUs. |
| Debounced manual reset | MR input includes internal 50–85kΩ pullup and 100ns glitch rejection, eliminating need for RC filters or Schmitt triggers. |
| Precision reset threshold | ±2.5% accuracy over -40°C to +125°C ensures consistent trip point across temperature for +3.3V supply monitoring. |
| Low quiescent current | 23µA typical supply current enables integration into always-on subsystems without compromising battery life. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply and software execution in diesel injection control unit exposed to wide thermal and EMI stress. IC Role / Device Role / Timing Role: Provides power-on reset, brownout protection, and windowed watchdog supervision of main MCU firmware loop. Use Value: Prevents unsafe actuator commands during voltage sag or software hang; 10s slow timeout catches long-duration lockups missed by standard watchdogs. |
Use Scenario: Ensures deterministic startup and runtime integrity of ARM-based I/O controller in factory automation cabinet. IC Role / Device Role / Timing Role: Generates clean reset pulse on power-up and asserts WDPO if fieldbus communication task stalls beyond 10s. Use Value: Eliminates need for external reset supervisor IC and discrete watchdog timer, reducing BOM count and board area. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
|
Use Scenario: Supervises safety-critical ARM Cortex-M4 in battery-powered infusion pump with strict IEC 62304 compliance requirements. IC Role / Device Role / Timing Role: Delivers fail-safe reset and dual-window watchdog to detect both rapid timing faults (e.g., clock failure) and slow hangs (e.g., motor stall detection loop freeze). Use Value: Meets SIL-2 functional safety requirements via deterministic 15ms/10s fault detection windows and guaranteed reset down to 1.2V. |
Use Scenario: Protects FPGA-based signaling interface in trackside electronics operating in harsh electromagnetic environments (-40°C to +125°C). IC Role / Device Role / Timing Role: Monitors 3.3V FPGA core supply and validates firmware heartbeat via WDI; pulses WDPO on timing violation to trigger failover logic. Use Value: Enables EN 5012x-compliant safe state transition without adding external timing components or increasing layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324DUT29 | Identical reset threshold and watchdog timing, but open-drain RESET output instead of push-pull. | Required when interfacing with bidirectional μP reset pins (e.g., Motorola 68HC11) or level-shifting across multiple supply domains. | Select MAX6324DUT29 only if open-drain RESET is needed; otherwise MAX6323DUT29 simplifies design with direct drive capability. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold (±0.5%), no windowed watchdog; offers adjustable delay (0–10s) but single timeout mode only. | Suitable for basic power-monitoring applications without runtime software execution validation. | Choose TPS3808G33DBVR only for cost-sensitive non-safety designs where dual-window watchdog is unnecessary. |
Compared with MAX6324DUT29, MAX6323DUT29 eliminates external pullup resistors on RESET and supports direct connection to CMOS inputs; compared with TPS3808G33DBVR, it provides superior fault coverage via min/max watchdog timing that detects both stuck and stalled code paths - essential for ASIL-B/C automotive and SIL-2 medical systems.
Availability
MAX6323DUT29 is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC design, and medical device certification programs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX6323DUT29 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The MAX6323/MAX6324 family delivers integrated power-supply monitoring and advanced windowed watchdog functionality specifically for safety-critical embedded systems requiring deterministic fault detection and fail-safe reset behavior.
FAQ
What is the watchdog timeout configuration for MAX6323DUT29?
The "D" suffix in MAX6323DUT29 specifies a factory-trimmed watchdog timeout window of 15ms (fast) and 10s (slow). This dual-threshold setting detects both premature WDI pulses (indicating stuck code) and missing pulses (indicating full processor hang), making MAX6323DUT29 suitable for ASIL-B automotive applications where single-window watchdogs may miss critical failure modes.
Does MAX6323DUT29 support operation below 2.5V supply?
Yes, MAX6323DUT29 operates from VCC = +1.2V to +5.5V and guarantees valid RESET output down to +1.2V. This extended low-voltage operation ensures reliable brownout detection during power collapse events in automotive start-stop systems and battery-powered medical devices, where supply rails can dip below conventional 2.5V thresholds without losing supervisory function.
How does the reset threshold of MAX6323DUT29 relate to common supply rails?
The "29" suffix in MAX6323DUT29 denotes a nominal reset threshold of 2.93V (range 2.85V–3.00V), optimized for precise monitoring of +3.3V digital supplies. With ±2.5% accuracy over -40°C to +125°C, MAX6323DUT29 avoids false resets caused by temperature drift or supply ripple - critical in industrial controllers where 3.3V rail tolerance is typically ±5%.
Can MAX6323DUT29 replace MAX6323DUT31 in an existing design?
No - MAX6323DUT31 has a 3.08V nominal reset threshold (3.00V–3.15V range), while MAX6323DUT29 is trimmed to 2.93V (2.85V–3.00V). Substituting them risks premature reset assertion on a nominal 3.3V rail due to tighter margin. Always verify supply rail tolerance and worst-case voltage drop before interchanging MAX6323DUT29 and MAX6323DUT31 in production hardware.
Is MAX6323DUT29 qualified for automotive applications?
MAX6323DUT29 itself is not AEC-Q100 qualified; however, the MAX6324HUT44/V+T variant in the same family is explicitly rated for automotive use. For automotive deployments, select AEC-Q100-qualified versions (denoted by "/V" suffix) and confirm qualification status via Maxim's official documentation - MAX6323DUT29 is intended for industrial and medical applications requiring extended temperature operation but not formal automotive qualification.
MAX6323DUT29 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6323DUT29 FAQ
1.How can I place an order for MAX6323DUT29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323DUT29 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 MAX6323DUT29 reliable?
The price and inventory of MAX6323DUT29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323DUT29 is usually 5 days.
3.What payment methods are accepted for MAX6323DUT29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323DUT29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323DUT29?
MAX6323DUT29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323DUT29 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 MAX6323DUT29?
For technical support, including MAX6323DUT29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323DUT29 requirements.
6.How does Aetrix verify that MAX6323DUT29 is sourced from the original manufacturer or authorized distributors?
All MAX6323DUT29 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 MAX6323DUT29 meets industry standards.
7.What is the process for return or replacement of MAX6323DUT29?
All MAX6323DUT29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323DUT29, 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 MAX6323DUT29 part is unused and in its original packaging.
Return procedure for MAX6323DUT29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6323DUT29 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…
