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Analog Devices Inc./Maxim Integrated MAX6737XKSHD3+
- Part No.:
- MAX6737XKSHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6737XKSHD3+.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT, FI
- Quantity:
- Payment:
- Shipping:
Inventory:745
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Product details
Overview
The MAX6737XKSHD3+ 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), operating over -40°C to +85°C in a 5-pin SC70 package. It asserts reset when either supply falls below its threshold, maintains reset for ≥150ms after recovery, and draws only 6µA typical supply current-ideal for battery-powered portable equipment requiring reliable power monitoring.
For engineers reviewing the MAX6737XKSHD3+ datasheet, MAX6737XKSHD3+ pinout, MAX6737XKSHD3+ application, or MAX6737XKSHD3+ equivalent, key selection criteria include confirmed dual-supply monitoring capability, push-pull RESET output compatibility with bidirectional µP reset pins, precise factory-set VTH1/VTH2 thresholds, 150ms minimum timeout, and SC70-5 footprint suitability for space-constrained multivoltage systems.
Technical Context
The MAX6737XKSHD3+ implements independent voltage comparators for VCC1 and VCC2, each referenced to a precision internal bandgap, with hysteresis of 0.5% to reject noise-induced false resets. Its push-pull RESET output is driven directly from VCC1 and requires no external pullup, simplifying interface with microprocessors lacking dedicated reset drivers.
Reset assertion is triggered by any monitored supply falling below its threshold or by pulling MR low for ≥1µs; reset remains asserted for ≥150ms after all supplies exceed thresholds or after MR release. The internal 1.5kΩ MR pullup enables direct connection to momentary switches without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±1.5% (factory-trimmed; ensures reliable I/O supply monitoring at nominal 3.0V or 3.3V rails) |
| VCC2 Threshold | 2.188V ±1.5% (factory-trimmed; matches common core supply voltages such as 2.2V or 2.5V) |
| Reset Timeout | 150ms min (guaranteed minimum hold time prevents premature µP release during supply ramp-up) |
| Supply Current | 6µA typical (enables multi-year operation on coin-cell batteries in portable devices) |
| Operating Temp | -40°C to +85°C (supports industrial and automotive-adjacent embedded applications) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; enables high-density PCB layouts) |
| Reset Output | Push-pull active-low (eliminates need for external pullup resistor; compatible with CMOS/TTL inputs) |
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 low to reset µP; actively pulled high to VCC1 when deasserted-no external pullup required |
| 2 - GND | Ground reference | Common return path for all internal comparators and output driver; must be low-impedance |
| 3 - MR | Manual reset input (active low) | Pull low ≥1µs to force reset; internal 1.5kΩ pullup to VCC1 allows direct switch-to-ground connection |
| 4 - VCC2 | Secondary supply monitor input | Monitors core voltage (e.g., 2.2V); comparator triggers reset if VCC2 < 2.188V |
| 5 - VCC1 | Primary supply monitor input | Monitors I/O voltage (e.g., 3.0V); powers internal circuitry and defines RESET high-level voltage |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Simultaneously monitors two independent supplies (VCC1 = 2.925V, VCC2 = 2.188V) with no external resistors needed |
| Push-pull RESET output | Eliminates external pullup component and associated board area; reduces BOM count and layout complexity |
| 150ms minimum reset timeout | Ensures µP completes full initialization before release-even during slow-ramping or noisy power supplies |
| 6µA ultra-low quiescent current | Extends battery life in always-on portable devices (e.g., >10 years on CR2032 at 10µA system sleep current) |
| SC70-5 compact package | Reduces footprint by >60% vs. SOT23-5; supports miniaturized designs in wearables and handheld instruments |
Applications
| Portable Power Management | Multivoltage Processor Supervision |
|---|---|
Use Scenario: Monitoring both I/O (3.0V) and core (2.2V) rails in a handheld GPS unit powered by a single Li-ion cell with DC/DC converters. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset if either rail drops during brownout or battery sag. Use Value: Prevents processor lockup or data corruption by guaranteeing both supplies stabilize before µP execution begins. | Use Scenario: Ensuring correct power-up sequence in an FPGA-based controller where I/O banks must be powered before core logic. IC Role / Device Role / Timing Role: Independent voltage monitoring with precise 2.925V/2.188V thresholds and 150ms timeout enforces timing margin between rail stabilization and reset release. Use Value: Eliminates need for discrete RC timers or additional sequencing ICs-reducing cost and failure points. |
| POS Terminal Reliability | Industrial Sensor Node |
Use Scenario: Supervising dual-rail power in a point-of-sale terminal with 5V USB input and internal 3.3V/1.8V regulators. IC Role / Device Role / Timing Role: Push-pull RESET output interfaces directly with ARM Cortex-M µP's bidirectional reset pin via 4.7kΩ series resistor per datasheet Figure 5. Use Value: Avoids logic contention while maintaining robust reset assertion-critical for transaction integrity during power interruption. | Use Scenario: Long-life remote sensor node using coin-cell battery and ultra-low-power MCU with separate analog and digital supplies. IC Role / Device Role / Timing Role: 6µA supply current and factory-trimmed thresholds minimize self-loading and eliminate calibration overhead. Use Value: Enables >5-year field deployment without maintenance-verified by typical ICC1/ICC2 curves across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKSHD3+ | Open-drain RESET output; requires external pullup resistor; identical VTH1/VTH2 thresholds and timeout | Suitable where system already provides pullup or where wired-OR reset bus is needed | Select when open-drain flexibility or bus-sharing is required; not drop-in due to output drive architecture |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold only); 350ms timeout; SOT-23-6 package; 1.6µA IQ | Cannot monitor dual rails simultaneously; requires two devices for equivalent function | Choose only for single-rail applications or when lowest possible quiescent current is paramount |
Compared with MAX6736XKSHD3+, the MAX6737XKSHD3+ offers push-pull drive eliminating external components, while TPS3808G15DBVR lacks dual-monitoring capability entirely-making MAX6737XKSHD3+ the only single-device solution matching both functional and footprint requirements.
Availability
MAX6737XKSHD3+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply and long-term production continuity.
Supply support for MAX6737XKSHD3+ 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 in industrial, medical, and consumer markets.
The MAX6736–MAX6745 product line delivers low-power, space-efficient µP supervisors optimized for dual- and triple-voltage monitoring in battery-operated and multirail embedded systems.
FAQ
What are the exact factory-trimmed reset thresholds for MAX6737XKSHD3+?
The MAX6737XKSHD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as defined by the "SH" suffix per Table 1 in the datasheet. These values are guaranteed over -40°C to +85°C with ±1.5% tolerance and include 0.5% hysteresis to prevent chatter during threshold crossing.
Does MAX6737XKSHD3+ require an external pullup resistor on the RESET pin?
No, MAX6737XKSHD3+ does not require an external pullup resistor because it features a push-pull RESET output. The output actively drives high to VCC1 when deasserted, eliminating the need for external components and simplifying interface with microprocessors that have bidirectional reset pins.
What is the minimum pulse width required on the MR pin to trigger reset in MAX6737XKSHD3+?
The MR pin of MAX6737XKSHD3+ requires a minimum low pulse width of 1µs to reliably assert reset. This short requirement enables use with mechanical pushbuttons or fast digital logic, and the internal 100ns glitch rejection filter prevents spurious triggering from noise.
Can MAX6737XKSHD3+ monitor a 1.8V core supply?
Yes, MAX6737XKSHD3+ can monitor a 1.8V core supply via the VCC2 pin, as its 2.188V threshold is within the valid operating range for VCC2 (0.9V to 3.3V). However, for tighter margin, consider MAX6737XKSD3+ (VTH2 = 1.710V) or MAX6737XKRD3+ (VTH2 = 1.388V), both in the same family.
Is MAX6737XKSHD3+ compatible with lead-free PCB assembly processes?
Yes, MAX6737XKSHD3+ is offered in lead-free packaging. The "+" suffix in the part number explicitly denotes RoHS-compliant, lead-free termination, qualified for standard reflow profiles including JEDEC J-STD-020 moisture sensitivity level 1.
MAX6737XKSHD3+ 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:
- 1.313V, 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
MAX6737XKSHD3+ FAQ
1.How can I place an order for MAX6737XKSHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKSHD3+ 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 MAX6737XKSHD3+ reliable?
The price and inventory of MAX6737XKSHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKSHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6737XKSHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6737XKSHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6737XKSHD3+?
MAX6737XKSHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKSHD3+ 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 MAX6737XKSHD3+?
For technical support, including MAX6737XKSHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKSHD3+ requirements.
6.How does Aetrix verify that MAX6737XKSHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6737XKSHD3+ 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 MAX6737XKSHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6737XKSHD3+?
All MAX6737XKSHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKSHD3+, 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 MAX6737XKSHD3+ part is unused and in its original packaging.
Return procedure for MAX6737XKSHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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