My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6323FUT46+
- Part No.:
- MAX6323FUT46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6323FUT46+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,041
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6323FUT46+ from Maxim Integrated is a microprocessor supervisory circuit with windowed (min/max) watchdog, 4.63V ±2.5% reset threshold, push-pull active-low RESET output, and factory-trimmed fast/slow watchdog timeout (719ms/1.3s). It operates from 1.2V to 5.5V supply and guarantees valid RESET down to VCC = +1.2V, serving as a system integrity monitor in automotive engine control units.
For engineers reviewing the MAX6323FUT46+ datasheet, MAX6323FUT46+ pinout, MAX6323FUT46+ application, or MAX6323FUT46+ equivalent, key selection criteria include its AEC-Q100-compatible operation over –40°C to +125°C, 23µA typical supply current, 100ms minimum reset timeout, and SOT23-6 package compatibility with space-constrained embedded control designs.
Technical Context
The MAX6323FUT46+ implements a dual-window watchdog architecture: fast timeout (719ms min) detects premature WDI pulses, while slow timeout (1.3s max) identifies missing pulses-both measured from falling edge of WDI with ≥300ns pulse width. WDPO asserts a 1ms open-drain pulse on fault detection, independent of RESET status.
VCC monitoring uses a precision comparator with ±2.5% accuracy across –40°C to +125°C; RESET remains asserted for ≥100ms after VCC rises above 4.63V and MR deasserts. The push-pull RESET output drives logic directly without external pullup, supporting reliable power-on/brownout reset in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - precisely monitors +5.0V rail with guaranteed assertion below nominal voltage |
| Watchdog Fast Timeout | 719ms (min) - detects software loops executing too rapidly or clock faults causing excessive WDI frequency |
| Watchdog Slow Timeout | 1.3s (max) - identifies stalled firmware or processor lockup where WDI pulses cease entirely |
| Supply Current | 23µA typ at 3.3V - enables always-on supervision in battery-backed or low-power automotive modules |
| Reset Timeout Delay | 100ms (min) - ensures µP completes full initialization before release from reset state |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| VCC Range | 1.2V to 5.5V - maintains functional RESET assertion even during deep brownout conditions |
Pinout & Package
MAX6323FUT46+ is housed in a 6-pin SOT23 package (package code U6+1A), with 1.6mm × 2.9mm footprint and 0.95mm height, suitable for high-density PCB layouts in automotive and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Internally pulled up; asserts RESET and clears watchdog timer when pulled low ≥1µs; debounced against 100ns glitches |
| 2 - GND | Ground reference | Common return path for all internal circuits; requires low-impedance connection to minimize noise coupling into reset comparator |
| 3 - WDI | Watchdog input | Falling-edge-triggered; resets internal watchdog timer; accepts 300ns minimum pulse width; VIH = 0.75×VCC, VIL = 0.8V |
| 4 - VCC | Supply voltage input | Monitored rail input; bypass with ≥500pF capacitor near pin to suppress transients; absolute max = +6.0V |
| 5 - WDPO | Open-drain watchdog pulse output | Pulses low for 1ms on fast/slow fault detection; requires external pullup to ≤+6V; inactive when RESET is asserted |
| 6 - RESET | Active-low push-pull reset output | Drives CMOS/TTL loads directly; VOH ≥0.8×VCC, VOL ≤0.4V at 500µA sink; no external pullup required |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Simultaneous fast (719ms) and slow (1.3s) timeout windows detect both runaway and stalled code execution |
| Guaranteed reset validity to VCC = +1.2V | Ensures deterministic reset behavior during deep brownout, preventing undefined µP states in failing power conditions |
| Debounced manual reset input | MR rejects 100ns transients and requires only 1µs low pulse-enables direct switch interface without RC network |
| Low quiescent current | 23µA typical consumption allows continuous supervision in always-on automotive subsystems without battery drain |
| Factory-laser-trimmed thresholds | Eliminates external resistor networks; 4.63V reset and 719ms/1.3s watchdog windows are set at wafer level for production consistency |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply and main MCU activity in diesel ECU exposed to wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and windowed watchdog supervision of MCU instruction flow. Use Value: Prevents unsafe operation due to corrupted firmware or clock failure by asserting RESET within 100ms of VCC drop below 4.63V and pulsing WDPO on timing violations. |
Use Scenario: Ensures deterministic startup and runtime integrity of ARM-based I/O controller in factory automation cabinet. IC Role / Device Role / Timing Role: System-level supervisor generating synchronized reset and watchdog fault signals for fieldbus communication processors. Use Value: Guarantees µP enters known state at power-up and detects software hangs via 719ms/1.3s watchdog window-critical for SIL-2 safety compliance. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Provides fail-safe reset and watchdog supervision for safety-critical dosing algorithm processor in battery-powered infusion pump. IC Role / Device Role / Timing Role: Fault-detection circuit asserting RESET on supply collapse and WDPO on abnormal WDI timing-triggering alarm and safe shutdown. Use Value: Maintains functional safety by validating µP activity within strict timing bounds (719ms fast / 1.3s slow) and asserting RESET down to VCC = +1.2V during battery depletion. |
Use Scenario: Supervises FPGA-based signaling logic in trackside interlocking unit operating in harsh electromagnetic environments. IC Role / Device Role / Timing Role: High-reliability supervisor delivering robust reset generation and independent watchdog pulse output for redundancy validation. Use Value: Enables dual-channel fault detection: RESET ensures clean FPGA configuration on power recovery, while WDPO provides traceable watchdog event logging for EN 5012x compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6324FUT46+ | Identical reset threshold (4.63V) and watchdog timeouts (719ms/1.3s), but open-drain RESET output requiring external pullup | Suitable for systems with bidirectional µP reset pins or multi-rail level-shifting requirements | Select MAX6324FUT46+ only when open-drain RESET is needed for bus sharing or voltage translation |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no windowed watchdog (single timeout), 35µA supply current, same SOT23-6 package | Limited to 3.3V systems; lacks min/max watchdog capability for advanced firmware validation | Choose TPS3808G33DBVR only for cost-sensitive 3.3V applications where windowed watchdog is unnecessary |
Compared with MAX6324FUT46+, the MAX6323FUT46+ offers direct-drive push-pull RESET-reducing BOM count and layout complexity-while TPS3808G33DBVR trades watchdog sophistication for lower cost and simpler integration in fixed-voltage systems.
Availability
MAX6323FUT46+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6323FUT46+ 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 demanding industrial, automotive, and medical applications, with emphasis on reliability and parametric accuracy.
The MAX6323/MAX6324 family delivers AEC-Q100-qualified microprocessor supervision with windowed watchdog functionality, targeting safety-critical embedded systems where deterministic reset and firmware execution monitoring are mandatory.
FAQ
What is the exact reset threshold voltage of MAX6323FUT46+ and how is it trimmed?
The MAX6323FUT46+ has a nominal reset threshold of 4.63V with ±2.5% accuracy over –40°C to +125°C. This value is laser-trimmed at wafer level during manufacturing, eliminating the need for external resistive dividers and ensuring consistent performance across production lots without calibration.
Does MAX6323FUT46+ support windowed watchdog functionality, and what are its timeout values?
Yes, MAX6323FUT46+ implements true windowed (min/max) watchdog supervision. Its fast timeout is 719ms (minimum interval between WDI falling edges), and its slow timeout is 1.3s (maximum allowable interval). These values are factory-set and specified in the Watchdog Timeout table of the datasheet.
What is the RESET output type of MAX6323FUT46+, and does it require an external pullup resistor?
MAX6323FUT46+ features a push-pull active-low RESET output. It does not require an external pullup resistor-VOH reaches ≥0.8×VCC and VOL stays ≤0.4V at 500µA sink, enabling direct drive of CMOS/TTL inputs in automotive and industrial control applications.
How does MAX6323FUT46+ behave when VCC drops below 1.2V, and why is this important?
MAX6323FUT46+ guarantees valid RESET assertion down to VCC = +1.2V. Below this voltage, the RESET output becomes high-impedance. This specification ensures deterministic reset behavior during deep brownout events-critical for automotive ECUs and medical devices where uncontrolled µP states must be avoided even during severe supply collapse.
What package type and footprint does MAX6323FUT46+ use, and is it RoHS-compliant?
MAX6323FUT46+ is supplied in a 6-pin SOT23 package (outline 21-0058, land pattern 90-0175) with 1.6mm × 2.9mm body size. The "+" suffix confirms lead-free, RoHS-compliant construction per JEDEC J-STD-020 reflow standards, with peak soldering temperature of +260°C.
MAX6323FUT46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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-6
MAX6323FUT46+ FAQ
1.How can I place an order for MAX6323FUT46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6323FUT46+ 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 MAX6323FUT46+ reliable?
The price and inventory of MAX6323FUT46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6323FUT46+ is usually 5 days.
3.What payment methods are accepted for MAX6323FUT46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6323FUT46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6323FUT46+?
MAX6323FUT46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6323FUT46+ 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 MAX6323FUT46+?
For technical support, including MAX6323FUT46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6323FUT46+ requirements.
6.How does Aetrix verify that MAX6323FUT46+ is sourced from the original manufacturer or authorized distributors?
All MAX6323FUT46+ 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 MAX6323FUT46+ meets industry standards.
7.What is the process for return or replacement of MAX6323FUT46+?
All MAX6323FUT46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6323FUT46+, 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 MAX6323FUT46+ part is unused and in its original packaging.
Return procedure for MAX6323FUT46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6323FUT46+ 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…
