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Analog Devices Inc./Maxim Integrated MAX6737XKSDD3+
- Part No.:
- MAX6737XKSDD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6737XKSDD3+.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,162
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Product details
Overview
MAX6737XKSDD3+ from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC with push-pull active-low reset output, manual reset input, and factory-trimmed thresholds of 2.925V (VCC1) and 2.188V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package - used to ensure reliable power-on reset sequencing in multivoltage portable systems.
For engineers reviewing the MAX6737XKSDD3+ datasheet, MAX6737XKSDD3+ pinout, MAX6737XKSDD3+ application, or MAX6737XKSDD3+ equivalent, this page delivers verified specifications, exact pin functions, real-world use cases in battery-powered equipment, and validated alternative parts for dual-supply monitoring with push-pull reset.
Technical Context
The MAX6737XKSDD3+ monitors two independent supply rails (VCC1 and VCC2) using precision internal voltage references; reset assertion occurs when either falls below its factory-set threshold, and reset remains asserted for ≥150ms after both return above threshold. It includes an internal 1.5kΩ pullup on MR and guarantees valid RESET output while VCC1 or VCC2 >1.2V.
Its push-pull RESET output is referenced to VCC1 and drives high to ≥0.8×VCC1 (ISOURCE = 800µA) and low to ≤0.4V (ISINK = 3.2mA), eliminating need for external pullup. The device operates across –40°C to +85°C and draws only 6µA total supply current at 3.3V/2.5V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% (factory-trimmed; enables reliable I/O supply monitoring at 3.0V nominal) |
| VCC2 Threshold | 2.188V ±2.5% (factory-trimmed; supports core supply monitoring at 2.2V nominal) |
| Reset Timeout | 150ms min (ensures µP completes boot initialization before release) |
| Supply Current | 6µA max (enables multi-year operation in coin-cell–powered devices) |
| Operating Temp | –40°C to +85°C (qualified for industrial and portable embedded environments) |
| RESET Output Type | Push-pull active-low (drives directly to µP reset pin without external resistor) |
| Package | SC70-5 (1.6mm × 1.6mm footprint; compatible with high-density PCB layouts) |
Pinout & Package
Package: SC70-5, 1.6mm × 1.6mm × 0.9mm, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; logic high = 0.8×VCC1, logic low = ≤0.4V at 3.2mA sink |
| 2 - GND | Analog/digital ground reference | Common return for all internal comparators and output stage; must be low-impedance |
| 3 - MR | Active-low manual reset input | Pulled up internally to VCC1 via 1.5kΩ; asserts RESET when pulled <0.3×VCC1 for ≥1µs |
| 4 - VCC2 | Secondary supply monitor input | Connects to core rail (e.g., 2.2V); monitored against 2.188V threshold |
| 5 - VCC1 | Primary supply monitor input | Connects to I/O rail (e.g., 3.0V); monitored against 2.925V threshold; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage supervision | Simultaneously monitors VCC1 (2.925V) and VCC2 (2.188V) with independent comparators and hysteresis |
| Push-pull RESET output | Eliminates external pullup resistor; reduces BOM count and layout area in space-constrained designs |
| 150ms reset timeout | Guarantees sufficient hold time for µP clock stabilization and register initialization |
| 6µA ultra-low supply current | Extends battery life in always-on portable devices such as GPS trackers and medical sensors |
| MR input with internal pullup | Enables momentary switch interface without external components; debounced via internal timing |
Applications
| Portable Power Management | Notebook System Monitoring |
|---|---|
Use Scenario: Supervising dual-rail power in handheld GPS units powered by single-cell Li-ion battery with DC-DC converters generating 3.0V I/O and 2.2V core rails. IC Role / Device Role / Timing Role: MAX6737XKSDD3+ asserts RESET until both rails stabilize post-power-up and holds reset during brownout on either rail. Use Value: Prevents firmware crash due to premature µP execution; 6µA quiescent current extends battery runtime beyond 3 years in sleep mode. | Use Scenario: Ensuring correct power-up sequence between 3.3V chipset I/O and 1.8V CPU core in ultraportable notebooks. IC Role / Device Role / Timing Role: MAX6737XKSDD3+ monitors both rails independently and releases RESET only after both exceed thresholds for ≥150ms. Use Value: Eliminates need for discrete RC timing networks; SC70-5 footprint saves >0.8mm² vs. SOT23 alternatives. |
| Industrial Controller Reset | POS Terminal Power Integrity |
Use Scenario: Providing fail-safe reset in programmable logic controllers exposed to 12V field bus transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: MAX6737XKSDD3+ maintains valid RESET state down to VCC1 or VCC2 = 1.2V and operates reliably from –40°C to +85°C. Use Value: Guarantees deterministic reset behavior under voltage droop and thermal stress; no external hysteresis components required. | Use Scenario: Securing power-on integrity in point-of-sale terminals with separate 5V logic and 3.3V display supply rails. IC Role / Device Role / Timing Role: MAX6737XKSDD3+ uses MR pin to support front-panel reset button; push-pull output interfaces directly to ARM Cortex-M reset pin. Use Value: Reduces system-level debug time by eliminating floating reset lines and pullup resistor tolerance effects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKSDD3+ | Open-drain RESET output; requires external pullup resistor; identical thresholds and timing | Suitable where µP reset pin is open-drain–compatible or bidirectional; adds one passive component | Select when interfacing with legacy µPs requiring wired-OR reset buses |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold only); 350ms timeout; 2.5µA IQ; SOT-23-5 package | Monitors only one rail; lacks dual-threshold capability and MR input | Choose only if system has single-rail dependency and lowest possible quiescent current is critical |
Compared with MAX6736XKSDD3+, the MAX6737XKSDD3+ eliminates external pullup needs via push-pull output, improving noise immunity and reducing component count; versus TPS3808G15DBVR, it provides true dual-rail monitoring and manual reset - essential for multivoltage SoC platforms.
Availability
MAX6737XKSDD3+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6737XKSDD3+ 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 in demanding industrial and portable applications.
The MAX6736–MAX6745 product line delivers ultra-low-power dual/triple-voltage supervisors optimized for battery longevity and board space savings in multirail embedded systems.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKSDD3+?
The MAX6737XKSDD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as defined by the "S" and "Y" suffixes in its part number per Maxim's Table 1. These values are guaranteed over –40°C to +85°C with ±2.5% tolerance and include built-in hysteresis of 0.5% of threshold voltage.
Does the MAX6737XKSDD3+ require an external pullup resistor on the RESET pin?
No, the MAX6737XKSDD3+ features a push-pull RESET output that actively drives high to ≥0.8×VCC1 and low to ≤0.4V, eliminating the need for an external pullup resistor. This distinguishes it from the open-drain MAX6736XKSDD3+ variant and simplifies PCB layout.
What is the minimum pulse width required on the MR pin to trigger reset on the MAX6737XKSDD3+?
The MR pin on the MAX6737XKSDD3+ requires a minimum low pulse width of 1µs to assert RESET. The internal 1.5kΩ pullup to VCC1 ensures reliable release when the switch opens, and the MR-to-RESET delay is guaranteed at 300ns maximum.
Can the MAX6737XKSDD3+ monitor a 1.2V core supply?
No - the MAX6737XKSDD3+ is configured with fixed thresholds of 2.925V and 2.188V and cannot monitor 1.2V supplies. For sub-2V rails, select MAX6737 variants with "D", "E", or "F" suffixes (e.g., MAX6737XKDSD3+) offering VCC2 thresholds down to 0.788V, or use the adjustable RSTIN-capable MAX6738/MAX6739 family.
Is the MAX6737XKSDD3+ RoHS-compliant and lead-free?
Yes, the "+" suffix in MAX6737XKSDD3+ explicitly denotes lead-free, RoHS-compliant packaging per Maxim's ordering convention. It uses matte-tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.
MAX6737XKSDD3+ 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:
- -
MAX6737XKSDD3+ FAQ
1.How can I place an order for MAX6737XKSDD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKSDD3+ 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 MAX6737XKSDD3+ reliable?
The price and inventory of MAX6737XKSDD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKSDD3+ is usually 5 days.
3.What payment methods are accepted for MAX6737XKSDD3+?
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4.How is shipping managed for MAX6737XKSDD3+?
MAX6737XKSDD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKSDD3+ 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 MAX6737XKSDD3+?
For technical support, including MAX6737XKSDD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKSDD3+ requirements.
6.How does Aetrix verify that MAX6737XKSDD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6737XKSDD3+ 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 MAX6737XKSDD3+ meets industry standards.
7.What is the process for return or replacement of MAX6737XKSDD3+?
All MAX6737XKSDD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKSDD3+, 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 MAX6737XKSDD3+ part is unused and in its original packaging.
Return procedure for MAX6737XKSDD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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