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Analog Devices Inc./Maxim Integrated MAX6737XKVDD3+
- Part No.:
- MAX6737XKVDD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6737XKVDD3+.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
The MAX6737XKVDD3+ from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC with push-pull active-low RESET output, manual reset input (MR), and factory-trimmed thresholds of 2.925V (VCC1) and 2.188V (VCC2). It features a 150ms minimum reset timeout period, 6µA supply current, and operates over -40°C to +85°C in a 5-pin SC70 package. It is used in portable multivoltage systems to ensure reliable µP reset during power-up, brownout, or manual intervention.
For engineers reviewing the MAX6737XKVDD3+ datasheet, MAX6737XKVDD3+ pinout, MAX6737XKVDD3+ application, or MAX6737XKVDD3+ equivalent, key selection criteria include confirmed dual-supply monitoring capability, push-pull RESET drive strength, MR timing behavior, VTH1/VTH2 tolerance over temperature, and compatibility with battery-powered I/O/core rail sequencing.
Technical Context
The MAX6737XKVDD3+ monitors two independent supply rails-VCC1 (primary, 2.925V threshold) and VCC2 (secondary, 2.188V threshold)-and asserts RESET low if either falls below its threshold. Reset remains asserted for ≥150ms after both supplies recover, with internal timer restart on subsequent undervoltage events.
It includes an internal 1.5kΩ pullup on MR and supports CMOS- or switch-driven manual reset; RESET deasserts only after MR returns high and the 150ms MR timeout elapses. The push-pull RESET output is referenced to VCC1 and sinks up to 3.2mA while maintaining VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% (factory-trimmed; enables precise I/O rail monitoring) |
| VCC2 Threshold | 2.188V ±2.5% (factory-trimmed; supports common core voltage rails) |
| Reset Timeout | 150ms min (guaranteed hold time ensures µP initialization completes) |
| Supply Current | 6µA typical (enables multi-year battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (qualified for industrial and extended-temperature embedded use) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; space-constrained PCB design) |
| RESET Type | Push-pull active-low (no external pullup required; drives µP reset pin directly) |
Pinout & Package
Package: 5-pin SC70 (1.6mm × 1.6mm, 0.5mm pitch, thin-profile surface-mount).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; no external pullup needed; sinks 3.2mA at VOL ≤ 0.4V |
| 2 - GND | Analog/digital ground reference | Common return for all internal comparators, timers, and output stage |
| 3 - MR | Active-low manual reset input | Internal 1.5kΩ pullup to VCC1; 1µs minimum pulse width; debounced via 150ms timeout |
| 4 - VCC2 | Secondary supply monitor input | Monitors core rail (2.188V threshold); valid operation down to 1.0V |
| 5 - VCC1 | Primary supply monitor input | Monitors I/O rail (2.925V threshold); powers internal circuitry and RESET output stage |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Simultaneous monitoring of 2.925V (VCC1) and 2.188V (VCC2) rails without external resistors |
| Push-pull RESET output | Eliminates need for external pullup resistor; reduces BOM count and layout area |
| 150ms reset timeout | Guaranteed minimum assertion time ensures µP reset sequence completion |
| 6µA quiescent current | Enables >10-year battery life in always-on portable devices (e.g., GPS, medical sensors) |
| MR with internal pullup | Allows direct connection of momentary switch to GND-no external components required |
Applications
| Portable Multivoltage Systems | Notebook Power Sequencing |
|---|---|
Use Scenario: Battery-powered handheld device with separate 2.9V I/O and 2.2V core rails. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting RESET until both rails stabilize post-power-up or during brownout. Use Value: Prevents µP lockup by ensuring core logic initializes only after I/O rail is valid and stable for ≥150ms. | Use Scenario: Notebook motherboard requiring controlled I/O-before-core power-up sequence. IC Role / Device Role / Timing Role: Monitors VCC1 (I/O) and VCC2 (core); holds RESET until both meet thresholds and timeout expires. Use Value: Eliminates need for discrete sequencing ICs-reduces cost and board area while guaranteeing safe boot order. |
| POS Terminal Supervision | Industrial Controller Brownout Protection |
Use Scenario: Point-of-sale terminal with 3.3V interface and 1.8V processor core, powered from AC adapter or backup battery. IC Role / Device Role / Timing Role: Detects undervoltage on either rail and forces clean µP reset via push-pull RESET. Use Value: Push-pull drive ensures robust reset signal integrity across noisy industrial environments without pullup vulnerability. | Use Scenario: Programmable logic controller exposed to fluctuating 24V DC input with local 2.9V/2.2V regulation. IC Role / Device Role / Timing Role: Provides deterministic reset response to input transients or regulator dropout. Use Value: 6µA supply current and -40°C to +85°C rating enable deployment in unheated enclosures with long maintenance cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKVDD3+ | Open-drain RESET output; requires external pullup resistor | Suitable where µP reset pin is bidirectional or open-drain compatible | Select when system already uses pullup or shares RESET bus with other open-drain devices |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold); no VCC2 monitor; 360ms timeout | Lacks dual-rail capability; requires additional IC for second rail monitoring | Choose only if supervising one rail or adding discrete comparator for second rail |
Compared with MAX6736XKVDD3+, the MAX6737XKVDD3+ eliminates external pullup needs and simplifies layout, while TPS3808G15DBVR cannot replace dual-monitoring functionality without redesign-making MAX6737XKVDD3+ optimal for space-constrained dual-rail systems requiring guaranteed reset timing and ultra-low power.
Availability
MAX6737XKVDD3+ is available at Aetrix Electronics and suitable for portable electronics, multivoltage embedded controllers, and industrial POS terminals requiring stable component supply and long-term manufacturability.
Supply support for MAX6737XKVDD3+ 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 power, sensing, and connectivity applications.
The MAX6736–MAX6745 family delivers low-power, space-efficient µP supervision for battery-operated and multivoltage systems-emphasizing factory-trimmed accuracy, minimal quiescent current, and integrated sequencing support.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKVDD3+?
The MAX6737XKVDD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, with ±2.5% tolerance over the full -40°C to +85°C temperature range. These values are defined by the "KV" suffix per Table 1 in the datasheet and do not require external resistor networks.
Does the MAX6737XKVDD3+ require an external pullup resistor on the RESET pin?
No-the MAX6737XKVDD3+ features a push-pull RESET output, so no external pullup resistor is needed. This differs from open-drain variants like MAX6736XKVDD3+. The push-pull stage actively drives high (VOH ≥ 0.8×VCC1) and low (VOL ≤ 0.4V at 3.2mA sink), enabling direct connection to most µP reset inputs.
What is the function of the MR pin on the MAX6737XKVDD3+ and how is it biased?
The MR pin on the MAX6737XKVDD3+ is an active-low manual reset input with an internal 1.5kΩ pullup resistor to VCC1. When pulled to GND for ≥1µs, it forces RESET low and maintains it for 150ms after MR returns high. This allows direct connection to a momentary switch without external components.
Can the MAX6737XKVDD3+ monitor a 1.2V core supply?
No-the MAX6737XKVDD3+ is configured with fixed thresholds of 2.925V (VCC1) and 2.188V (VCC2), neither of which supports 1.2V monitoring. For sub-2V rails, consider MAX6738/MAX6739 with RSTIN or MAX6742/MAX6745 with PFI, which accept adjustable thresholds down to 0.488V via external dividers.
What is the supply current consumption of the MAX6737XKVDD3+ at 25°C and full temperature range?
The MAX6737XKVDD3+ draws 6µA typical supply current at +25°C, with ICC1 and ICC2 combining to ≤10µA across -40°C to +85°C. This ultra-low quiescent current is specified under no-load conditions with both VCC1 and VCC2 above their thresholds and RESET deasserted.
MAX6737XKVDD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6737XKVDD3+ FAQ
1.How can I place an order for MAX6737XKVDD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKVDD3+ 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 MAX6737XKVDD3+ reliable?
The price and inventory of MAX6737XKVDD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKVDD3+ is usually 5 days.
3.What payment methods are accepted for MAX6737XKVDD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6737XKVDD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6737XKVDD3+?
MAX6737XKVDD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKVDD3+ 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 MAX6737XKVDD3+?
For technical support, including MAX6737XKVDD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKVDD3+ requirements.
6.How does Aetrix verify that MAX6737XKVDD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6737XKVDD3+ 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 MAX6737XKVDD3+ meets industry standards.
7.What is the process for return or replacement of MAX6737XKVDD3+?
All MAX6737XKVDD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKVDD3+, 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 MAX6737XKVDD3+ part is unused and in its original packaging.
Return procedure for MAX6737XKVDD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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