My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6730AUTSD3+T
- Part No.:
- MAX6730AUTSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730AUTSD3+T.pdf
- Description:
- IC SUPERVISOR MPU W/WD SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,524
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6730AUTSD3+T from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, factory-set +3.075V VCC1 reset threshold, 140–280ms reset timeout, and independent watchdog timer featuring 35s startup delay and 1.12s normal timeout. It monitors primary supply voltage only, supports manual reset input, and operates across -40°C to +125°C for reliable power-on and brownout detection in embedded control systems.
For engineers reviewing the MAX6730AUTSD3+T datasheet, MAX6730AUTSD3+T pinout, MAX6730AUTSD3+T application, or MAX6730AUTSD3+T equivalent, this page delivers verified specifications, SOT23-6 package details, watchdog timing behavior, reset assertion conditions, and validated alternative parts for multivoltage system supervision.
Technical Context
The MAX6730AUTSD3+T implements dual-mode watchdog logic: a 35s (min) initial timeout after reset enables full system initialization, followed by a 1.12s (min) normal watchdog period triggered by first WDI edge detection. Its reset comparator guarantees valid operation down to VCC1 = +0.8V and features 20ppm/°C tempco and 0.5% hysteresis referenced to typical threshold.
It uses a BiCMOS process (1073 transistors), draws only 14µA typical supply current at +3.6V, and provides immunity to short VCC transients - tolerating up to ~10µs glitches at 75mV overdrive per Typical Operating Characteristics. The device asserts RST low on VCC1 drop below +3.075V, MR assertion, or watchdog timeout, holding reset for the full D3 timeout window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V nominal (D3 suffix corresponds to TZ threshold per Table 1); ensures reliable reset assertion when primary supply falls below this level |
| Reset Timeout Period | 140–280ms (D3 suffix); defines minimum duration RST remains asserted after fault clearance or MR release |
| Watchdog Timeout | 35s min initial period, then 1.12s min normal period; prevents premature lockup detection during boot while enabling rapid fault response post-initialization |
| Supply Current | 14µA typical at +3.6V; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Operating Temperature | -40°C to +125°C; fully specified for under-hood automotive, industrial PLC, and telecom equipment environments |
| Reset Output Type | Active-low open-drain; requires external pullup resistor for logic-level compatibility with diverse µP reset inputs |
| Manual Reset Input | Active-low with 50kΩ internal pullup; allows operator-initiated reset without external components beyond momentary switch to GND |
Pinout & Package
MAX6730AUTSD3+T is housed in a 6-pin SOT23-6 package (pkg code U6-1), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and JEDEC MO-178 compliance. Pin 1 is marked with a dot; lead finish is lead-free (indicated by "+T" suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts low on VCC1 undervoltage, MR activation, or watchdog timeout; requires external pullup |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane for stable threshold operation |
| 3 | WDO | Active-low open-drain watchdog output; asserts low if no WDI transition occurs within timeout; independent of RST state |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); drives RST low when asserted and restarts reset timeout |
| 5 | WDI | Watchdog input; rising or falling edge clears watchdog timer; floating input does not disable watchdog function |
| 6 | VCC1 | Primary supply input; powers device and feeds VCC1 reset comparator; threshold set to +3.075V for this variant |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout enables safe boot sequencing and responsive runtime fault detection |
| Guaranteed reset validity down to VCC1 = +0.8V | Ensures deterministic reset behavior even during deep brownout conditions before complete power loss |
| Immunity to short VCC transients | Tolerates ≤10µs falling glitches at 75mV overdrive (per toc07), preventing spurious resets in noisy power environments |
| Low 14µA supply current | Minimizes quiescent power draw in always-on monitoring applications such as remote sensors or backup controllers |
| Factory-set +3.075V VCC1 threshold | Eliminates external resistor network for standard 3.3V rail supervision, reducing BOM count and layout area |
Applications
| Industrial PLC Controller | Telecom Line Card |
|---|---|
|
Use Scenario: Monitors 3.3V core supply in programmable logic controller CPU module during cold start and brownout events. IC Role / Device Role / Timing Role: Single-voltage supervisor asserting active-low open-drain RST to hold ARM Cortex-M7 in reset until VCC1 stabilizes above +3.075V for ≥280ms. Use Value: Prevents firmware execution from corrupted memory due to insufficient supply voltage, leveraging guaranteed reset validity down to +0.8V. |
Use Scenario: Supervises primary 3.3V bias rail in high-density Ethernet line card with multiple ASICs and PHYs. IC Role / Device Role / Timing Role: Provides synchronized reset pulse and independent watchdog monitoring via WDO to detect firmware hangs in packet-processing firmware. Use Value: Dual-mode watchdog (35s boot window + 1.12s runtime) avoids false timeouts during complex FPGA configuration while ensuring rapid recovery from lockups. |
| Automotive Body Control Module | Medical Infusion Pump Controller |
|
Use Scenario: Embedded in under-dash BCM monitoring 3.3V microcontroller supply subjected to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Asserts RST on VCC1 drop below +3.075V; uses MR pin for service-mode reset via diagnostic port. Use Value: Immunity to ≤10µs VCC glitches (per toc07) prevents nuisance resets during alternator switching noise, improving field reliability. |
Use Scenario: Ensures fail-safe reset of safety-critical ARM-based pump controller during battery voltage sag or EMI-induced supply disturbance. IC Role / Device Role / Timing Role: Guarantees reset assertion down to VCC1 = +0.8V and holds RST for full 280ms timeout to allow EEPROM write completion before restart. Use Value: Eliminates need for external reset supervisor IC or RC network, reducing component count and qualification burden for Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6731AUTSD3+T | Push-pull RST output (vs. open-drain); identical VCC1 threshold (+3.075V), timeout (D3), and watchdog timing | Direct replacement where µP reset pin is unidirectional and requires active drive high during deassertion | Select when system lacks external pullup or requires guaranteed high-Z release without leakage path |
| TPS3808G33DBVR | Single-supply supervisor with +3.3V threshold, 200ms timeout, push-pull RST, and no manual reset or independent WDO | Lacks MR input and separate watchdog output; suitable only for basic reset-only supervision without watchdog autonomy | Choose only if watchdog independence and manual reset are unnecessary and push-pull RST is preferred |
Compared with MAX6730AUTSD3+T, MAX6731AUTSD3+T offers push-pull RST for simplified interface but removes open-drain flexibility, while TPS3808G33DBVR reduces feature set to basic reset-only operation - making MAX6730AUTSD3+T optimal for designs requiring autonomous watchdog signaling and manual reset capability in space-constrained SOT23-6 layouts.
Availability
MAX6730AUTSD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom line cards, and automotive body control modules requiring stable component supply, extended temperature operation, and long-term lifecycle support.
Supply support for MAX6730AUTSD3+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 demanding industrial, automotive, and communications applications.
The MAX6730A–MAX6735A family targets robust microprocessor supervision in multivoltage systems, delivering integrated reset, watchdog, and manual reset functions in miniature SOT23 packages for space- and reliability-critical designs.
FAQ
What is the exact VCC1 reset threshold voltage for MAX6730AUTSD3+T?
The MAX6730AUTSD3+T has a factory-set VCC1 reset threshold of +3.075V (nominal), corresponding to the "TZ" suffix per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed over -40°C to +125°C with ±1.5% tolerance and 20ppm/°C tempco, ensuring precise 3.3V rail supervision.
Does MAX6730AUTSD3+T support manual reset functionality?
Yes, MAX6730AUTSD3+T includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Driving MR low forces RST assertion for the full reset timeout period (140–280ms), making it suitable for service-mode resets or external fault-triggered recovery without additional components.
What is the watchdog timeout behavior of MAX6730AUTSD3+T?
MAX6730AUTSD3+T features dual-mode watchdog timing: a 35s minimum initial timeout after any reset event (power-up, brownout, or MR), followed by a 1.12s minimum normal timeout after the first valid WDI edge. This architecture accommodates lengthy boot sequences while maintaining rapid fault response during runtime.
Is MAX6730AUTSD3+T compatible with 1.8V or 2.5V supply rails?
No - MAX6730AUTSD3+T is configured exclusively for +3.075V VCC1 threshold and is intended for 3.3V systems. For 1.8V or 2.5V rails, alternate variants like MAX6730AUTVD3+T (+1.575V) or MAX6730AUTSD3+T's sibling MAX6732A series (dual-voltage) would be required; this specific part is not rated for sub-3V primary supply supervision.
What package type and dimensions does MAX6730AUTSD3+T use?
MAX6730AUTSD3+T uses a lead-free 6-pin SOT23-6 package (U6-1), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads. Pin 1 is identified by a dot; the package complies with JEDEC MO-178 variation BA and supports reflow soldering per IPC/JEDEC J-STD-020.
MAX6730AUTSD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.925V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6730AUTSD3+T FAQ
1.How can I place an order for MAX6730AUTSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730AUTSD3+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 MAX6730AUTSD3+T reliable?
The price and inventory of MAX6730AUTSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730AUTSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6730AUTSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730AUTSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730AUTSD3+T?
MAX6730AUTSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730AUTSD3+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 MAX6730AUTSD3+T?
For technical support, including MAX6730AUTSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730AUTSD3+T requirements.
6.How does Aetrix verify that MAX6730AUTSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6730AUTSD3+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 MAX6730AUTSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6730AUTSD3+T?
All MAX6730AUTSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730AUTSD3+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 MAX6730AUTSD3+T part is unused and in its original packaging.
Return procedure for MAX6730AUTSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6730AUTSD3+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…
