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Analog Devices Inc./Maxim Integrated MAX6761TAZWD3+
- Part No.:
- MAX6761TAZWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6761TAZWD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,355
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Product details
Overview
MAX6761TAZWD3+ from Maxim Integrated is a dual-voltage window detector IC designed to monitor undervoltage and overvoltage conditions on two independent power rails-VCC (3.3V nominal) and VCC2 (1.8V nominal). It features factory-trimmed thresholds, ±15% window select via SET pin, 100ms minimum reset timeout (D3), latched overvoltage output, manual reset input, and operates from -40°C to +125°C in automotive-grade TDFN-8 package. It is used in DC-DC converter modules for fault-safe power sequencing.
For engineers reviewing the MAX6761TAZWD3+ datasheet, MAX6761TAZWD3+ pinout, MAX6761TAZWD3+ application, or MAX6761TAZWD3+ equivalent, key selection considerations include dual-rail monitoring capability, latched OV output behavior, VCC/VCC2 threshold pairing (T = 3.3V / W = 1.8V), ±15% window configurability, and AEC-Q100 qualification for automotive use.
Technical Context
The MAX6761TAZWD3+ implements dual independent voltage comparators with internal reference and hysteresis (0.7%), supporting simultaneous monitoring of VCC (3.3V) and VCC2 (1.8V) against factory-set UV/OV thresholds. Its OVLATCH pin enables persistent overvoltage fault signaling until cleared externally.
It uses BiCMOS process technology, supports push-pull and open-drain output configurations (UV = active-low push-pull, OV = active-low open-drain), and includes a manual reset input with 4µs minimum pulse width and 300ns propagation delay. Threshold accuracy is specified across -40°C to +125°C with <±3% total error over temperature and supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Nominal Voltage | 3.3V - primary monitored rail; UVTH = 2.970–3.135V (falling), OVTH = 3.465–3.630V (rising) |
| VCC2 Nominal Voltage | 1.8V - secondary monitored rail; UVTH2 = 1.620–1.710V (falling), OVTH2 = 1.890–1.980V (rising) |
| Window Select Accuracy | ±15% - achieved by biasing SET pin to VCC/2; enables robust tolerance margin for noisy supplies |
| Reset Timeout Period | 100ms min - ensures stable microprocessor reset hold time after supply recovery |
| Supply Current (ICC) | 13–30µA at VCC = 3.6V - enables always-on monitoring in low-power automotive ECUs |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 |
| Output Types | UV: active-low push-pull; OV: active-low open-drain; OVLATCH: high-impedance control input |
Pinout & Package
MAX6761TAZWD3+ is housed in an 8-pin TDFN package (3mm × 3mm, 0.75mm height) with exposed pad (EP) internally connected to GND. The package is RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | Asserts UV and resets latch; 26kΩ internal pullup to VCC; 4µs minimum pulse width required |
| 2 - OVLATCH | Overvoltage latch control | High = latch OV output; low = clear latch; high-impedance input requiring external pullup/pulldown |
| 3 - UV | Undervoltage output | Active-low push-pull; asserts when VCC or VCC2 falls below respective UVTH; deasserts after 100ms timeout |
| 4 - OV | Overvoltage output | Active-low open-drain; asserts immediately on OV condition; latched if OVLATCH = high; no timeout |
| 5 - SET | Window threshold select | Bias to VCC/2 for ±15% window; determines hysteresis range for both VCC and VCC2 detectors |
| 6 - VCC2 | Secondary supply input | Monitored rail (1.8V nominal); powers internal circuitry only when VCC2 > VCC; supports adjustable threshold via external divider |
| 7 - GND | Ground reference | Common return for all analog/digital functions; EP must be connected to GND for thermal and EMI performance |
| 8 - VCC | Primary supply input | Main power and primary monitored rail (3.3V nominal); valid operation down to 1.0V; outputs remain asserted below 1.4V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (3.3V) and VCC2 (1.8V) with separate UV/OV comparators and thresholds |
| Latched overvoltage output | OVLATCH pin enables persistent fault flagging until system software/hardware explicitly clears it |
| Configurable window tolerance | SET pin selects ±5%, ±10%, or ±15% window - critical for accommodating supply ripple and aging drift |
| Low quiescent current | 13–30µA ICC enables integration into always-on domains without compromising battery life |
| AEC-Q100 qualified | Rated for automotive Grade 1 (-40°C to +125°C) with production test coverage per AEC standard |
Applications
| Power Sequencing in Automotive ADAS ECUs | Redundant Supply Monitoring in Telecom Line Cards |
|---|---|
Use Scenario: Dual-rail power-up sequence for radar processor and interface ASIC where VCC (3.3V I/O) must stabilize before VCC2 (1.8V core) is enabled. IC Role / Device Role / Timing Role: MAX6761TAZWD3+ monitors both rails and asserts UV only when both are valid; latched OV prevents false resets during transient overvoltage events. Use Value: Ensures deterministic boot order and eliminates race conditions between domain power supplies, improving functional safety compliance. | Use Scenario: Monitoring primary and backup 3.3V/1.8V supplies in carrier-grade Ethernet switch line cards. IC Role / Device Role / Timing Role: Acts as autonomous fault detector: OV latch triggers failover controller; MR allows remote reset initiation via service processor. Use Value: Enables zero-downtime switchover by isolating supply faults before they propagate to packet processing logic. |
| DC-DC Converter Module Protection | Industrial PLC Power Management |
Use Scenario: Real-time supervision of input (24V) and output (3.3V/1.8V) rails in isolated DC-DC modules used in factory automation. IC Role / Device Role / Timing Role: Detects input overvoltage (via VCC2 divider) and output undervoltage simultaneously; OV latch holds fault signal for diagnostic logging. Use Value: Prevents catastrophic failure of downstream FPGAs by disabling enable signals within microseconds of fault detection. | Use Scenario: Monitoring auxiliary 3.3V logic and 1.8V FPGA core supplies in programmable logic controllers operating in harsh industrial environments. IC Role / Device Role / Timing Role: Provides hardened reset assertion with 100ms timeout and ±15% window to tolerate brownout conditions without nuisance resets. Use Value: Maintains deterministic state machine operation during grid fluctuations, reducing unplanned downtime in continuous-process systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage window monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBVR | Single-supply (3.3V only), no VCC2 input, no OVLATCH, no SET-adjustable window, fixed ±5% window | Only suitable for single-rail monitoring; lacks latching and dual-rail coordination needed for MAX6761TAZWD3+ use cases | Select when cost-sensitive designs require basic 3.3V reset only, without redundancy or fault persistence |
| ADM1266ACPZ | 12-channel PMBus-configurable supervisor with sequencer, far higher complexity, 5V-only supply, QFN-64 | Targets complex multi-rail server/ASIC power systems; requires firmware configuration and PMBus infrastructure | Select for high-end programmable power management where flexibility outweighs BOM cost and design simplicity |
Compared with TLV809E33DBVR and ADM1266ACPZ, the MAX6761TAZWD3+ uniquely balances dual-rail autonomy, latch persistence, and automotive qualification in a minimal 8-pin footprint-making it optimal for cost-constrained, safety-critical embedded power supervision without software overhead.
Availability
MAX6761TAZWD3+ is available at Aetrix Electronics and suitable for automotive ADAS modules, telecom line card redundancy systems, and industrial DC-DC converter protection requiring stable component supply, AEC-Q100 compliance, and dual-rail fault detection.
Supply support for MAX6761TAZWD3+ 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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6761TAZWD3+ belongs to the MAX6754–MAX6764 family of low-power window detectors, engineered specifically for reliable dual-rail power supply monitoring in automotive and industrial environments where latch-based fault reporting and wide temperature operation are mandatory.
FAQ
What voltage rails does the MAX6761TAZWD3+ monitor, and what are their nominal values?
The MAX6761TAZWD3+ monitors two independent voltage rails: VCC at 3.3V nominal (suffix 'T') and VCC2 at 1.8V nominal (suffix 'W'). These correspond to factory-trimmed thresholds - VCC UVTH = 2.970–3.135V (falling), OVTH = 3.465–3.630V (rising); VCC2 UVTH2 = 1.620–1.710V, OVTH2 = 1.890–1.980V. The 'Z' in the part number indicates ±15% window select via the SET pin.
Does the MAX6761TAZWD3+ provide latched overvoltage detection, and how is it controlled?
Yes, the MAX6761TAZWD3+ provides latched overvoltage detection via the OVLATCH pin (Pin 2). When OVLATCH is driven high, the OV output remains asserted even after the overvoltage condition clears, enabling persistent fault flagging. Driving OVLATCH low clears the latch. The pin is high-impedance and requires an external pullup or pulldown resistor to define its default state.
What is the function of the SET pin on the MAX6761TAZWD3+, and how is it configured for ±15% window?
The SET pin configures the undervoltage/overvoltage window tolerance. For ±15%, SET must be biased to VCC/2 using a resistive divider. This setting applies identically to both VCC and VCC2 thresholds. The MAX6761TAZWD3+ datasheet specifies that VCC/2 bias yields ±15%, while connection to GND gives ±5% and to VCC gives ±10%.
What is the reset timeout behavior of the MAX6761TAZWD3+, and how does it differ between UV and OV outputs?
The MAX6761TAZWD3+ has a 100ms minimum reset timeout (D3 suffix) for UV output deassertion after supply recovery. The UV output remains asserted for ≥100ms once VCC or VCC2 rises above its UVTH. In contrast, the OV output has no timeout - it deasserts immediately when the overvoltage condition ends, unless latched via OVLATCH.
Is the MAX6761TAZWD3+ qualified for automotive applications, and what does the '+' suffix indicate?
Yes, the MAX6761TAZWD3+ is AEC-Q100 qualified for automotive Grade 1 (-40°C to +125°C). The '+' suffix denotes lead(Pb)-free, RoHS-compliant packaging - replacing the legacy '-T' suffix per Maxim's ordering convention. This ensures compliance with automotive environmental standards and solder reflow profiles.
MAX6761TAZWD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.8V, 2.5V
- 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:
- 8-TDFN (3x3)
MAX6761TAZWD3+ FAQ
1.How can I place an order for MAX6761TAZWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6761TAZWD3+ 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 MAX6761TAZWD3+ reliable?
The price and inventory of MAX6761TAZWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6761TAZWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6761TAZWD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6761TAZWD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6761TAZWD3+?
MAX6761TAZWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6761TAZWD3+ 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 MAX6761TAZWD3+?
For technical support, including MAX6761TAZWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6761TAZWD3+ requirements.
6.How does Aetrix verify that MAX6761TAZWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6761TAZWD3+ 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 MAX6761TAZWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6761TAZWD3+?
All MAX6761TAZWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6761TAZWD3+, 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 MAX6761TAZWD3+ part is unused and in its original packaging.
Return procedure for MAX6761TAZWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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