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Analog Devices Inc./Maxim Integrated MAX6733AUTTGD3+
- Part No.:
- MAX6733AUTTGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6733AUTTGD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:413
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Product details
Overview
MAX6733AUTTGD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output, independent push-pull watchdog output, and factory-set VCC1/VCC2 reset thresholds of +3.075V/+2.313V. It features a 140ms–280ms reset timeout (D3), 35s minimum watchdog startup delay, and operates across –40°C to +125°C for reliable power monitoring in multivoltage embedded systems.
For engineers reviewing the MAX6733AUTTGD3+ datasheet, MAX6733AUTTGD3+ pinout, MAX6733AUTTGD3+ application, or MAX6733AUTTGD3+ equivalent, this device delivers deterministic reset assertion under dual-supply brownout, manual reset initiation, and robust watchdog supervision - critical for telecom, industrial, and server applications requiring high-temperature stability and low quiescent current (14µA typ).
Technical Context
The MAX6733AUTTGD3+ monitors two fixed supply rails (VCC1 = +3.075V, VCC2 = +2.313V) using precision internal comparators with 20ppm/°C tempco and 0.5% hysteresis. Its active-low RST output remains asserted for the full D3 timeout period (140–280ms) after both supplies exceed thresholds or MR deasserts.
It implements a dual-mode watchdog timer: 35s min initial timeout after reset enables safe system boot, followed by 1.12s min normal-mode timeout (tWD-S) triggered by WDI edge transitions. The push-pull WDO output asserts low on watchdog expiration or undervoltage lockout, with no external pullup required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V nominal (T suffix), ±125mV tolerance - sets precise brownout detection for primary 3.3V rail |
| VCC2 Reset Threshold | +2.313V nominal (Z suffix), ±62.5mV tolerance - monitors secondary 2.5V or 1.8V domain |
| Reset Timeout Period | D3 option: 140ms (min) to 280ms (max) - ensures sufficient hold time for processor initialization |
| Watchdog Startup Delay | 35s (min) after reset - accommodates lengthy firmware boot sequences before watchdog enforcement begins |
| Supply Current | 14µA typical at +3.6V - enables battery-backed operation in portable equipment |
| Operating Temperature | –40°C to +125°C - fully specified for automotive under-hood and industrial control environments |
| RST Output Type | Active-low push-pull - eliminates need for external pullup resistor and supports direct drive of µP reset pins |
| WDO Output Type | Active-low push-pull - provides immediate, low-impedance watchdog fault signaling without external components |
Pinout & Package
MAX6733AUTTGD3+ is housed in a 6-pin SOT23-6 package (U6-1), measuring 2.9mm × 1.6mm × 1.1mm, suitable for space-constrained PCB layouts in portable and telecom equipment.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output - asserts when VCC1 < +3.075V, VCC2 < +2.313V, or MR is pulled low; drives µP reset directly |
| 2 | GND | Ground reference for all internal comparators, watchdog logic, and I/O buffers |
| 3 | WDO | Active-low push-pull watchdog output - asserts on WDI timeout (1.12s min) or VCC1/VCC2/RSTIN undervoltage |
| 4 | MR | Active-low manual reset input - internal 50kΩ pullup to VCC1; momentary GND connection forces system reset |
| 5 | WDI | Watchdog input - rising/falling edges clear watchdog timer; floating state does not disable function |
| 6 | VCC1 | Primary supply input - powers device and feeds VCC1 threshold comparator; must be ≥ +0.8V for valid RST output |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneous supervision of VCC1 (+3.075V) and VCC2 (+2.313V) with independent comparators and hysteresis |
| Push-pull RST and WDO outputs | Eliminates external pullup resistors, reduces BOM count, and ensures fast, low-impedance reset/warning signaling |
| Guaranteed reset validity down to VCC = +0.8V | Ensures clean reset assertion during deep brownout conditions common in battery-powered systems |
| Immunity to short VCC transients | Rejects glitches ≤10µs (at 75mV overdrive), preventing spurious resets in noisy power environments |
| Low 14µA supply current | Minimizes standby power draw - critical for always-on IoT nodes and energy-harvesting applications |
| Extended temperature range | Full functionality from –40°C to +125°C supports deployment in harsh industrial and automotive under-hood locations |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
|
Use Scenario: Monitoring +3.3V and +2.5V rails in a base station power management unit during cold start and load transients. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to FPGA and DSP upon either rail drop below threshold. Use Value: Prevents partial configuration and metastability by enforcing 140–280ms reset hold time while guaranteeing operation down to +0.8V VCC. |
Use Scenario: Ensuring deterministic restart of a programmable logic controller after AC mains interruption or brownout. IC Role / Device Role / Timing Role: Providing fail-safe reset signal to ARM Cortex-M7 core and isolated I/O drivers during voltage sag. Use Value: Push-pull RST drives µP reset directly without pullup; 35s watchdog startup delay avoids false timeout during bootloader execution. |
| Server BMC Health Monitoring | Portable Medical Device |
|
Use Scenario: Supervising auxiliary +3.3V and +1.8V supplies powering Baseboard Management Controller (BMC) and sensor interfaces. IC Role / Device Role / Timing Role: Dual-threshold monitoring with manual reset override via BMC GPIO for remote recovery. Use Value: MR input with 50kΩ internal pullup simplifies interface; 14µA quiescent current extends BMC battery backup runtime. |
Use Scenario: Maintaining safe shutdown and restart behavior in a handheld ultrasound probe powered by Li-ion battery. IC Role / Device Role / Timing Role: Detecting battery voltage collapse below +3.075V (VCC1) and +2.313V (VCC2) to trigger controlled data save and reset. Use Value: Guaranteed reset validity to +0.8V ensures reliable assertion even during deep discharge; SOT23-6 footprint saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6732AUTTGD3+ | Open-drain RST output (vs. push-pull); identical VCC1/VCC2 thresholds and D3 timeout | Requires external pullup resistor; suited for bidirectional µP reset pins or wired-OR reset buses | Select when interfacing with µPs having bidirectional reset I/O or when reset bus sharing is required |
| TPS3808G33DBVR | Single-voltage supervisor (3.3V only); 200ms fixed timeout; 1.8µA IQ; no manual reset or watchdog output | Lacks dual-rail monitoring, MR, and independent WDO - limited to basic 3.3V rail supervision | Choose only if system requires single-rail monitoring with ultra-low power and no watchdog or manual reset needs |
Compared with MAX6732AUTTGD3+, the MAX6733AUTTGD3+ eliminates external pullup components and supports direct µP reset drive, while TPS3808G33DBVR offers lower quiescent current but sacrifices dual-rail capability, watchdog supervision, and manual reset - making it unsuitable as a functional replacement.
Availability
MAX6733AUTTGD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, extended temperature operation, and dual-rail brownout protection.
Supply support for MAX6733AUTTGD3+ 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 highly integrated, temperature-stable microprocessor supervisors optimized for multivoltage systems where reliability, low power, and compact packaging are essential.
FAQ
What are the exact reset threshold voltages for MAX6733AUTTGD3+?
The MAX6733AUTTGD3+ has factory-set VCC1 and VCC2 reset thresholds of +3.075V (T suffix) and +2.313V (Z suffix), respectively, with ±125mV and ±62.5mV tolerances over –40°C to +125°C. These values are confirmed in Table 1 of the datasheet and correspond to the "TZ" threshold combination encoded in the part number.
Does MAX6733AUTTGD3+ include a manual reset input?
Yes, MAX6733AUTTGD3+ includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Driving MR low forces an immediate reset assertion on RST, holding for the full D3 timeout period (140–280ms) after MR returns high - enabling hardware-initiated recovery without software intervention.
What is the watchdog timeout behavior of MAX6733AUTTGD3+?
MAX6733AUTTGD3+ uses a dual-mode watchdog: a 35s minimum startup delay after reset allows full system initialization, then transitions to a 1.12s minimum normal-mode timeout (tWD-S). WDO asserts low if no WDI edge occurs within that window, and deasserts immediately when a valid edge is detected - ensuring rapid fault response during runtime.
Is MAX6733AUTTGD3+ compatible with bidirectional µP reset pins?
MAX6733AUTTGD3+ features a push-pull RST output, which may cause contention with bidirectional µP reset I/O. To avoid logic conflict, connect a 10kΩ series resistor between RST and the µP's reset pin - as documented in Figure 5 of the datasheet - ensuring safe interoperability without damaging either device.
What package type and dimensions does MAX6733AUTTGD3+ use?
MAX6733AUTTGD3+ is supplied in a 6-pin SOT23-6 package (U6-1), with body dimensions of 2.9mm × 1.6mm × 1.1mm and lead pitch of 0.95mm. This compact outline is verified in the "Package Information" section (page 15) and matches standard SOT23-6 footprints used in high-density PCB designs.
MAX6733AUTTGD3+ 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.11V, 3.075V
- 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-23-6
MAX6733AUTTGD3+ FAQ
1.How can I place an order for MAX6733AUTTGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6733AUTTGD3+ 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 MAX6733AUTTGD3+ reliable?
The price and inventory of MAX6733AUTTGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6733AUTTGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6733AUTTGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6733AUTTGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6733AUTTGD3+?
MAX6733AUTTGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6733AUTTGD3+ 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 MAX6733AUTTGD3+?
For technical support, including MAX6733AUTTGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6733AUTTGD3+ requirements.
6.How does Aetrix verify that MAX6733AUTTGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6733AUTTGD3+ 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 MAX6733AUTTGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6733AUTTGD3+?
All MAX6733AUTTGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6733AUTTGD3+, 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 MAX6733AUTTGD3+ part is unused and in its original packaging.
Return procedure for MAX6733AUTTGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6733AUTTGD3+ Tags
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MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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MCP130T-315I/TT
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