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Analog Devices Inc./Maxim Integrated MAX6737XKSFD3+
- Part No.:
- MAX6737XKSFD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6737XKSFD3+.pdf
- Description:
- MAX6737 LOW-POWER DUAL-VOLTAGE M
- Quantity:
- Payment:
- Shipping:
Inventory:8,639
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Product details
Overview
MAX6737XKSFD3+ 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 150ms minimum reset timeout, 6µA supply current, and operates over –40°C to +85°C in a 5-pin SC70 package. It is used in portable battery-powered systems requiring reliable dual-rail power monitoring and controlled reset assertion.
For engineers reviewing the MAX6737XKSFD3+ datasheet, MAX6737XKSFD3+ pinout, MAX6737XKSFD3+ application, or MAX6737XKSFD3+ equivalent, key selection criteria include its push-pull RESET drive capability, precise dual-threshold supervision without external adjustment, MR-initiated reset timing, low quiescent current for battery longevity, and SC70 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6737XKSFD3+ integrates two independent voltage comparators with internal precision references (2.925V and 2.188V) to monitor VCC1 and VCC2 simultaneously. Reset assertion occurs when either supply falls below its threshold, and deassertion requires both supplies to remain above thresholds for ≥150ms - a guaranteed minimum timeout period unaffected by transient dips.
Its push-pull RESET output drives high to VCC1 (not open-drain), eliminating need for external pullup resistors. The MR input includes a 1.5kΩ internal pullup to VCC1 and triggers a dedicated 150ms reset timeout upon valid low pulse (≥1µs), enabling hardware-initiated system resets independent of supply status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±0.075V (factory-trimmed; ensures reliable I/O rail monitoring at nominal 3.0V or 3.3V systems) |
| VCC2 Threshold | 2.188V ±0.075V (factory-trimmed; matches common core rails like 2.2V or 2.5V) |
| Reset Timeout | 150ms min (guaranteed minimum delay before RESET deassertion; prevents premature boot on marginal power-up) |
| Supply Current | 6µA typical (enables multi-year operation in coin-cell–powered devices) |
| Operating Temp | –40°C to +85°C (fully specified industrial temperature range; no derating required) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; compatible with automated SMT assembly and high-density PCB layouts) |
| RESET Type | Push-pull active-low (drives high to VCC1; eliminates external pullup and simplifies µP interface) |
Pinout & Package
Package: 5-pin SC70 (1.6mm × 1.6mm, 0.5mm pitch, thin profile).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives high to VCC1 (no external pullup needed); asserts low during fault or MR activation; logic-compatible with most µP reset inputs |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and output stage; must be connected directly to system ground plane |
| 3 - MR | Active-low manual reset input | Pulled up internally to VCC1 (1.5kΩ); accepts CMOS-level signals or momentary switch to GND; initiates 150ms reset pulse |
| 4 - VCC2 | Secondary supply voltage input | Monitored against 2.188V threshold; supports core rail supervision (e.g., 2.2V/2.5V); valid down to 0.9V per spec |
| 5 - VCC1 | Primary supply voltage input | Monitored against 2.925V threshold; supports I/O rail supervision (e.g., 3.0V/3.3V); powers internal circuitry and RESET output stage |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Eliminates external resistor networks and calibration; reduces BOM count and layout area vs. adjustable supervisors |
| Push-pull RESET output | Simplifies µP interface by removing external pullup resistor; improves noise immunity and rise time vs. open-drain alternatives |
| 150ms reset timeout (D3 option) | Ensures stable power-up before release; avoids race conditions in fast-ramping DC-DC converters |
| 6µA total supply current | Extends battery life in portable equipment; enables always-on supervision without significant drain |
| SC70-5 package | Reduces board area by >50% vs. SOT23-5; maintains thermal performance and manufacturability in compact designs |
Applications
| Portable Power Management | Industrial Controller Supervision |
|---|---|
Use Scenario: Battery-powered handheld instruments with dual-rail (3.3V I/O / 2.2V core) power architecture. IC Role / Device Role / Timing Role: Dual-supply monitor asserting RESET until both rails stabilize post-battery insertion or cold start. Use Value: Prevents firmware execution on under-rail conditions; 6µA current extends shelf life and runtime without compromising reliability. | Use Scenario: Programmable logic controller (PLC) module requiring deterministic reset after brownout recovery. IC Role / Device Role / Timing Role: Fault-detection supervisor triggering hard reset when either 3.3V backplane or 2.2V FPGA core drops below threshold. Use Value: Guarantees 150ms minimum hold time to allow power supplies to settle; push-pull output ensures clean µP reset edge without external components. |
| Medical Sensor Node | POS Terminal Power Sequencing |
Use Scenario: Wearable ECG sensor using coin-cell battery and ultra-low-power MCU with separate analog/digital rails. IC Role / Device Role / Timing Role: Monitors 3.0V analog front-end and 1.8V digital core; asserts RESET if either rail sags during RF transmission burst. Use Value: Factory-trimmed thresholds eliminate calibration drift; SC70 footprint fits tight wearable form factors. | Use Scenario: Point-of-sale terminal with sequenced 5V peripheral rail and 3.3V processor rail. IC Role / Device Role / Timing Role: Ensures processor remains held in reset until peripherals are fully powered and stable. Use Value: Manual reset (MR) allows field service personnel to force reboot without power cycling; 150ms timeout aligns with typical DC-DC startup delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKSFD3+ | Open-drain RESET output; requires external pullup resistor; identical thresholds, timeout, and package | Used where µP reset pin is bidirectional or shared with other open-drain signals | Select when system design mandates open-drain bus sharing or level translation |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold only); 350ms timeout; SOT-23-5 package; 2.5µA supply current | Only monitors one rail; lacks MR input and dual-threshold capability | Choose only for single-rail systems where cost or current is prioritized over dual monitoring |
Compared with MAX6736XKSFD3+, the MAX6737XKSFD3+ offers simplified interface via push-pull RESET, while TPS3808G15DBVR provides lower current but cannot replace dual-rail supervision - making MAX6737XKSFD3+ the only drop-in solution for existing dual-threshold, MR-enabled designs.
Availability
MAX6737XKSFD3+ is available at Aetrix Electronics and suitable for portable medical devices, industrial controllers, POS terminals, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX6737XKSFD3+ 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 interface applications in industrial, automotive, and computing markets.
The MAX6736–MAX6745 family delivers ultra-low-power dual/triple-voltage supervision for space-constrained, battery-sensitive systems - emphasizing factory-trimmed accuracy, minimal footprint, and robust reset timing control.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKSFD3+?
The MAX6737XKSFD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as indicated by the "S" and "Y" suffixes in its part number. These values are guaranteed across –40°C to +85°C with ±0.075V tolerance per the datasheet's Table 1, enabling precise dual-rail monitoring without external calibration. The MAX6737XKSFD3+ does not support adjustable thresholds.
Does the MAX6737XKSFD3+ require an external pullup resistor on the RESET pin?
No, the MAX6737XKSFD3+ features a push-pull RESET output that actively drives high to VCC1, eliminating the need for an external pullup resistor. This distinguishes it from open-drain variants like MAX6736XKSFD3+. The push-pull architecture simplifies schematic design, improves rise time, and avoids potential conflicts in bidirectional reset bus configurations.
What is the function of the MR pin on the MAX6737XKSFD3+ and how is it biased?
The MR (Manual Reset) pin on the MAX6737XKSFD3+ is an active-low input that forces RESET low when pulled below 0.3×VCC1 for ≥1µs. It includes a built-in 1.5kΩ pullup resistor to VCC1, allowing direct connection to a momentary switch to ground or CMOS logic. After MR release, RESET remains low for the full 150ms timeout period (D3 option), ensuring deterministic system reset initiation independent of supply status.
Can the MAX6737XKSFD3+ monitor voltages below 0.9V on VCC2?
No - the MAX6737XKSFD3+ is specified to monitor VCC2 from 0.9V to 3.3V only, with its fixed 2.188V threshold optimized for standard core rails (e.g., 2.2V, 2.5V). It does not support sub-0.9V monitoring. For lower-voltage supervision (e.g., 0.8V or 0.6V), consider the MAX6738/MAX6739 series with RSTIN input, which supports down to 0.488V via external divider.
What is the maximum operating voltage for VCC1 and VCC2 on the MAX6737XKSFD3+?
The MAX6737XKSFD3+ supports VCC1 and VCC2 operating voltages from 1.0V to 5.5V (per Absolute Maximum Ratings), with functional operation guaranteed from 1.2V to 5.5V across temperature. Its 2.925V/2.188V thresholds are designed for nominal 3.0V/3.3V and 2.2V rails respectively, but the device remains fully operational even when VCC1 = 5.0V and VCC2 = 1.2V - enabling flexible use in mixed-voltage systems.
MAX6737XKSFD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.05V, 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX6737XKSFD3+ FAQ
1.How can I place an order for MAX6737XKSFD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKSFD3+ 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 MAX6737XKSFD3+ reliable?
The price and inventory of MAX6737XKSFD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKSFD3+ is usually 5 days.
3.What payment methods are accepted for MAX6737XKSFD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6737XKSFD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6737XKSFD3+?
MAX6737XKSFD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKSFD3+ 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 MAX6737XKSFD3+?
For technical support, including MAX6737XKSFD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKSFD3+ requirements.
6.How does Aetrix verify that MAX6737XKSFD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6737XKSFD3+ 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 MAX6737XKSFD3+ meets industry standards.
7.What is the process for return or replacement of MAX6737XKSFD3+?
All MAX6737XKSFD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKSFD3+, 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 MAX6737XKSFD3+ part is unused and in its original packaging.
Return procedure for MAX6737XKSFD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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