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Analog Devices Inc./Maxim Integrated MAX6733AUTTGD3+T
- Part No.:
- MAX6733AUTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6733AUTTGD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6733AUTTGD3+T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output, active-low watchdog output, and no manual reset input. It monitors two fixed supply voltages (VCC1 = +3.075V nominal, VCC2 = +1.665V nominal), provides 210ms minimum reset timeout, operates from -40°C to +125°C, and draws only 14µA typical supply current at +3.6V - used in multivoltage embedded systems requiring reliable power-on reset and watchdog supervision.
For engineers reviewing the MAX6733AUTTGD3+T datasheet, MAX6733AUTTGD3+T pinout, MAX6733AUTTGD3+T application, or MAX6733AUTTGD3+T equivalent, key selection criteria include its dual-threshold monitoring capability, push-pull RST/WDO outputs, SOT23-6 package compatibility, and guaranteed reset validity down to VCC1/VCC2 = +0.8V for brownout resilience.
Technical Context
The MAX6733AUTTGD3+T implements independent voltage monitoring for primary (VCC1) and secondary (VCC2) rails using factory-trimmed comparators with ±1.5% threshold accuracy and 20ppm/°C tempco. Its reset logic asserts RST low when either rail falls below its preset threshold and holds for a 140–280ms timeout period after recovery.
It integrates a dual-mode watchdog timer: 35s minimum startup delay after reset enables full system initialization, followed by 1.12s minimum normal-mode timeout on WDI edge detection. The push-pull WDO output deasserts immediately upon valid WDI transition or voltage recovery - no external pullup required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V nominal (T-suffix), ±1.5% tolerance - monitors +3.3V rail with precise brownout detection |
| VCC2 Threshold | +1.665V nominal (G-suffix), ±1.5% tolerance - targets core voltage rails like +1.8V or +1.5V |
| Reset Timeout | 140ms min / 280ms max (D3 suffix) - ensures sufficient hold time for slow-starting peripherals |
| Supply Current | 14µA typical at +3.6V - enables always-on supervision in battery-critical applications |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = +0.8V - maintains functional reset assertion during deep brownout |
| Output Type | Push-pull RST and WDO - eliminates need for external pullup resistors, reduces BOM count |
Pinout & Package
MAX6733AUTTGD3+T is housed in a 6-pin SOT23-6 package (U6-1), footprint-compatible with industry-standard 2.9mm × 1.6mm outline and 0.95mm height. Pin 1 is marked with a dot; leads are lead-free (RoHS-compliant) with standard matte tin plating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output - drives µP reset pin directly without external pullup |
| 2 | GND | Ground reference for all internal comparators and outputs - must be low-impedance connection |
| 3 | WDO | Active-low push-pull watchdog output - signals processor lockup independently of reset state |
| 4 | WDI | Watchdog input - requires rising/falling edge every ≥1.12s in normal mode to prevent WDO assertion |
| 5 | VCC1 | Primary supply input - powers device and feeds VCC1 monitor; threshold = +3.075V |
| 6 | VCC2 | Secondary supply input - feeds VCC2 monitor; threshold = +1.665V; supports dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneous supervision of VCC1 (+3.075V) and VCC2 (+1.665V) with independent thresholds |
| Push-pull RST and WDO outputs | Eliminates external pullup resistors, simplifies PCB layout, improves noise immunity vs open-drain |
| Dual-mode watchdog timer | 35s startup delay enables safe boot; 1.12s normal timeout ensures rapid fault detection post-initialization |
| Immunity to short VCC transients | Rejects glitches ≤10µs at 75mV overdrive - prevents spurious resets in noisy power environments |
| Low supply current | 14µA typical at +3.6V - extends battery life in portable equipment and enables always-on monitoring |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Supervises +3.3V I/O and +1.8V core rails in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-rail voltage monitor and watchdog supervisor ensuring deterministic reset timing and lockup recovery. Use Value: Guarantees reset assertion down to +0.8V per rail and operates across -40°C to +125°C - meets EN 50155 rail reliability requirements. |
Use Scenario: Monitors +3.3V CAN transceiver supply and +1.8V microcontroller core in body electronics modules. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination and independent watchdog signaling to prevent firmware hang-induced safety faults. Use Value: Push-pull outputs drive automotive-grade reset pins directly; 14µA quiescent current minimizes battery drain during sleep mode. |
| Telecom Line Cards | Medical Infusion Pumps |
Use Scenario: Ensures clean power-up sequencing and runtime supervision of dual-supply FPGAs and PHYs in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-threshold supervisor with 210ms reset timeout aligns with FPGA configuration timing windows. Use Value: Factory-set thresholds eliminate calibration overhead; 20ppm/°C tempco maintains accuracy across chassis thermal gradients. |
Use Scenario: Supervises +3.3V motor driver and +1.8V MCU rails in battery-powered infusion pumps requiring Class II medical safety compliance. IC Role / Device Role / Timing Role: Independent watchdog output triggers hardware reset without software intervention during critical therapy delivery. Use Value: Guaranteed operation at +0.8V supports brownout recovery during battery depletion; RoHS/lead-free packaging meets IEC 60601-1 material requirements. |
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+T | Open-drain RST/WDO outputs; identical thresholds and timeout | Requires external pullup resistors; suitable where bus-sharing or level-shifting needed | Select when interfacing with bidirectional µP reset pins or shared reset buses |
| TPS3808G33DBVR | Single-voltage supervisor (3.3V only); 200ms timeout; 2.5µA IQ; SOT23-6 | Lacks VCC2 monitoring; no watchdog output; lower quiescent current | Choose for cost-sensitive single-rail systems where dual monitoring is unnecessary |
Compared with MAX6733AUTTGD3+T, MAX6732AUTTGD3+T offers identical supervision functionality but requires external pullups due to open-drain outputs, while TPS3808G33DBVR reduces cost and power at the expense of dual-rail capability and watchdog independence.
Availability
MAX6733AUTTGD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, telecom line cards, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6733AUTTGD3+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 delivers highly integrated, factory-configured µP supervisors targeting multivoltage embedded systems needing reliable reset generation and independent watchdog supervision without external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6733AUTTGD3+T?
The MAX6733AUTTGD3+T has a VCC1 reset threshold of +3.075V (T-suffix) and a VCC2 reset threshold of +1.665V (G-suffix), both with ±1.5% tolerance over -40°C to +125°C. These values are factory-trimmed and specified in the Reset Voltage Threshold Suffix Guide (Table 1) of the datasheet. The MAX6733AUTTGD3+T uses these fixed thresholds to supervise dual supply rails without external resistor networks.
Does the MAX6733AUTTGD3+T include a manual reset input (MR)?
No, the MAX6733AUTTGD3+T does not include a manual reset input. Per the Selector Guide and Pin Description, only MAX6730A/MAX6731A/MAX6734A/MAX6735A variants feature MR. The MAX6733AUTTGD3+T is a dual-voltage supervisor with watchdog and push-pull outputs but omits MR to reduce pin count and simplify design for applications where software or power-cycle reset suffices.
What is the watchdog timeout behavior of the MAX6733AUTTGD3+T during power-up?
The MAX6733AUTTGD3+T features a dual-mode watchdog timer: after any reset event (power-up, brownout, or manual reset), it enters a 35s minimum startup delay (tWD-L) to allow full system initialization. Once the first valid WDI edge occurs, it switches to the 1.12s minimum normal timeout (tWD-S). This behavior is inherent to the MAX6733AUTTGD3+T architecture and requires no configuration.
Can the MAX6733AUTTGD3+T monitor a third voltage rail?
No, the MAX6733AUTTGD3+T cannot monitor a third voltage rail. It is a dual-voltage supervisor (VCC1 + VCC2 only). The adjustable RSTIN input for monitoring a third rail is exclusive to MAX6734A/MAX6735A variants. The MAX6733AUTTGD3+T pinout lacks RSTIN, and its internal circuitry does not support this function - confirmed by the Selector Guide and Pin Configurations section.
What package type and dimensions does the MAX6733AUTTGD3+T use?
The MAX6733AUTTGD3+T uses a 6-pin SOT23-6 package (U6-1 code), measuring 2.9mm × 1.6mm × 0.95mm with 0.95mm pitch. It is lead-free (RoHS-compliant) and matches JEDEC MO-178 variation BA. This compact footprint enables high-density placement in space-constrained applications such as portable medical devices and telecom modules where the MAX6733AUTTGD3+T is commonly deployed.
MAX6733AUTTGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-6
MAX6733AUTTGD3+T FAQ
1.How can I place an order for MAX6733AUTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6733AUTTGD3+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 MAX6733AUTTGD3+T reliable?
The price and inventory of MAX6733AUTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6733AUTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6733AUTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6733AUTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6733AUTTGD3+T?
MAX6733AUTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6733AUTTGD3+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 MAX6733AUTTGD3+T?
For technical support, including MAX6733AUTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6733AUTTGD3+T requirements.
6.How does Aetrix verify that MAX6733AUTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6733AUTTGD3+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 MAX6733AUTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6733AUTTGD3+T?
All MAX6733AUTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6733AUTTGD3+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 MAX6733AUTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6733AUTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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