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Analog Devices Inc./Maxim Integrated MAX6730AUTZD3+T
- Part No.:
- MAX6730AUTZD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730AUTZD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
MAX6730AUTZD3+T from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, manual reset input, and independent watchdog timer. It monitors VCC1 at +3.075V (factory-set), asserts reset for 140–280ms after undervoltage recovery, and operates across –40°C to +125°C. Used in telecom power sequencing and embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6730AUTZD3+T datasheet, MAX6730AUTZD3+T pinout, MAX6730AUTZD3+T application, or MAX6730AUTZD3+T equivalent, key selection criteria include its fixed +3.075V VCC1 threshold, 140–280ms reset timeout, open-drain RST output, manual reset capability, and watchdog startup delay of ≥35s - all validated for automotive-grade temperature operation.
Technical Context
The MAX6730AUTZD3+T implements a dual-mode watchdog timer: a long initial timeout (≥35s) enables safe system boot before transitioning to standard 1.12s monitoring. Its reset logic guarantees valid RST assertion down to VCC1 = +0.8V, with immunity to sub-100ns VCC transients.
It features factory-trimmed VCC1 reset threshold (+3.075V nominal, ±125mV tolerance), 0.5% hysteresis, and 20ppm/°C tempco. The open-drain RST output requires external pullup; MR includes a 50kΩ internal pullup to VCC1 and accepts CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V (nominal), ±125mV tolerance - sets precise brownout detection point for primary supply |
| Reset Timeout Period | 140–280ms (D3 suffix) - ensures µP completes initialization before release |
| Watchdog Startup Delay | ≥35s after reset - accommodates full system boot without false timeout |
| Supply Current | 14µA typical at +3.6V - enables battery-backed or low-power always-on supervision |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial environments |
| RST Output Type | Active-low open-drain - allows wired-OR reset bus and flexible voltage-level translation |
| MR Input Logic | CMOS-compatible with 0.3×VCC1/0.7×VCC1 thresholds and 1µs minimum pulse width - supports pushbutton or FPGA-driven reset |
Pinout & Package
MAX6730AUTZD3+T is housed in a 6-pin SOT23-6 package (package code U6-1), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and lead-free finish (+T suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1 < +3.075V or MR is low |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | WDO | Active-low open-drain watchdog output; asserts if WDI lacks edge for >1.12s (normal mode) or >35s (startup) |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1 via 50kΩ; forces reset on logic-low assertion |
| 5 | WDI | Watchdog input; edge-sensitive (rising/falling); clears watchdog timer on transition; floating = no disable |
| 6 | VCC1 | Primary supply input; powers device and feeds VCC1 monitor; threshold set to +3.075V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout - prevents premature timeout during boot while enabling rapid fault response in runtime |
| Guaranteed reset validity | Operates down to VCC1 = +0.8V - ensures deterministic reset behavior during deep brownout conditions |
| VCC transient immunity | Rejects falling transients <100ns at 75mV overdrive - eliminates spurious resets from switching noise or ESD |
| Low quiescent current | 14µA typical at +3.6V - extends battery life in portable or backup-supervised systems |
| Factory-trimmed precision threshold | +3.075V VCC1 reset with ±125mV tolerance and 20ppm/°C tempco - removes need for external resistor networks |
Applications
| Telecom Power Sequencing | Industrial PLC Controller Supervision |
|---|---|
|
Use Scenario: Monitoring +3.3V bias rail in LTE base station RF front-end modules during cold-start and load transients. IC Role / Device Role / Timing Role: Single-voltage supervisor asserting open-drain RST to hold ARM Cortex-M7 in reset until stable +3.3V is confirmed. Use Value: Prevents firmware execution on marginal supply by enforcing 140–280ms hold time and rejecting <100ns glitches - critical for RF calibration integrity. |
Use Scenario: Ensuring deterministic restart of a DIN-rail mounted PLC after AC line sag or generator switchover. IC Role / Device Role / Timing Role: Primary supervisor for +24V-to-+3.3V converted logic rail, with MR tied to front-panel reset button. Use Value: 140–280ms D3 timeout matches PLC boot ROM latency; –40°C to +125°C rating supports uncooled cabinet deployment. |
| Automotive Infotainment Head Unit | Medical Portable Monitor Power Management |
|
Use Scenario: Supervising +3.0V core voltage of an SoC in a vehicle infotainment display module exposed to load-dump transients. IC Role / Device Role / Timing Role: Brownout detector with manual reset override for service mode; WDO connected to SoC's NMI pin. Use Value: +3.075V threshold aligns with SoC VDDIO spec; open-drain outputs enable level-shifting to 1.8V logic; 125°C rating covers under-dash thermal stress. |
Use Scenario: Managing power-up sequence of a battery-powered ECG monitor with dual LDOs feeding analog and digital subsystems. IC Role / Device Role / Timing Role: Single-rail supervisor for main +3.3V digital supply, with MR driven by microcontroller GPIO for self-test initiation. Use Value: 14µA supply current minimizes standby drain; 140–280ms timeout ensures ADC reference settles before firmware starts sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UTRVD3+T | Single-voltage, +2.625V VCC1 threshold, same SOT23-6 package, identical D3 timeout and open-drain RST | Lacks manual reset input (MR) and watchdog output (WDO); only provides basic reset supervision | Select when only brownout detection is needed and MR/WDO functions are handled elsewhere |
| TPS3808G33DBVR | +3.3V threshold (±0.5%), 200ms timeout, push-pull RST, no MR or WDO, 1.5µA supply current | Lower IQ but no watchdog or manual reset; requires external pullup for open-drain emulation | Prefer for ultra-low-power applications where watchdog independence is not required |
Compared with MAX6730AUTZD3+T, MAX6326UTRVD3+T omits MR and WDO functionality - reducing feature count but simplifying design - while TPS3808G33DBVR trades watchdog capability and manual reset for significantly lower quiescent current and tighter threshold accuracy, making it suitable for static supervision-only use cases.
Availability
MAX6730AUTZD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and automotive electronics requiring stable component supply with extended temperature qualification and long-lifecycle support.
Supply support for MAX6730AUTZD3+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 demanding industrial, automotive, and communications applications.
The MAX6730A–MAX6735A family delivers multi-rail supervision with integrated watchdog and manual reset in space-constrained SOT23 packages - engineered for reliability-critical embedded systems where power integrity and software lockup prevention are mandatory.
FAQ
What is the exact VCC1 reset threshold voltage for MAX6730AUTZD3+T?
The MAX6730AUTZD3+T has a factory-set VCC1 reset threshold of +3.075V nominal, with a guaranteed range of +3.000V to +3.150V at TA = +25°C and ±125mV tolerance over –40°C to +125°C. This value is encoded in the "TZ" suffix per Maxim's Reset Voltage Threshold Suffix Guide.
Does MAX6730AUTZD3+T support manual reset, and how is it implemented?
Yes, MAX6730AUTZD3+T includes an active-low manual reset input (MR) on Pin 4. It features a 50kΩ internal pullup to VCC1, accepts CMOS logic levels (VIH ≥ 0.7×VCC1, VIL ≤ 0.3×VCC1), and requires a minimum 1µs pulse width. Driving MR low forces RST assertion for the full reset timeout period.
What watchdog timeout periods does MAX6730AUTZD3+T provide?
MAX6730AUTZD3+T implements a dual-mode watchdog: an initial startup timeout of ≥35s after any reset event (power-up, brownout, or MR), followed by a normal-mode timeout of ≥1.12s. Both are fixed and non-adjustable - the "D3" suffix applies only to the reset timeout, not watchdog timing.
Is MAX6730AUTZD3+T compatible with 1.8V or 2.5V supply rails?
No - MAX6730AUTZD3+T is designed to supervise a primary supply at +3.075V and is not rated for direct supervision of 1.8V or 2.5V rails. Its VCC1 operating range is +0.8V to +5.5V, but the reset threshold is fixed at +3.075V; for lower-voltage monitoring, consider MAX6734A/MAX6735A with adjustable RSTIN input.
What package type and lead finish does MAX6730AUTZD3+T use?
MAX6730AUTZD3+T uses a 6-pin SOT23-6 package (Maxim package code U6-1) with gull-wing leads and lead-free (RoHS-compliant) finish, indicated by the "+T" suffix. Dimensions are 2.9mm × 1.6mm × 1.1mm, and it is fully specified from –40°C to +125°C.
MAX6730AUTZD3+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:
- 2.313V
- 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
MAX6730AUTZD3+T FAQ
1.How can I place an order for MAX6730AUTZD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730AUTZD3+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 MAX6730AUTZD3+T reliable?
The price and inventory of MAX6730AUTZD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730AUTZD3+T is usually 5 days.
3.What payment methods are accepted for MAX6730AUTZD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730AUTZD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730AUTZD3+T?
MAX6730AUTZD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730AUTZD3+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 MAX6730AUTZD3+T?
For technical support, including MAX6730AUTZD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730AUTZD3+T requirements.
6.How does Aetrix verify that MAX6730AUTZD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6730AUTZD3+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 MAX6730AUTZD3+T meets industry standards.
7.What is the process for return or replacement of MAX6730AUTZD3+T?
All MAX6730AUTZD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730AUTZD3+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 MAX6730AUTZD3+T part is unused and in its original packaging.
Return procedure for MAX6730AUTZD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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