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Analog Devices Inc./Maxim Integrated MAX6737XKZWD3+
- Part No.:
- MAX6737XKZWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6737XKZWD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,829
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Product details
Overview
MAX6737XKZWD3+ 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 3.075V (VCC1) and 1.665V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package. It monitors I/O and core supplies in portable battery-powered systems to ensure reliable µP initialization during power-up and brownout events.
For engineers reviewing the MAX6737XKZWD3+ datasheet, MAX6737XKZWD3+ pinout, MAX6737XKZWD3+ application, or MAX6737XKZWD3+ equivalent, this page delivers verified electrical specifications, confirmed pin functions, real-world use cases in multivoltage embedded systems, and validated alternative parts for design flexibility and supply continuity.
Technical Context
The MAX6737XKZWD3+ implements dual independent voltage monitoring with precision internal references - VTH1 = 3.075V ±75mV and VTH2 = 1.665V ±42mV over -40°C to +85°C - and asserts reset when either VCC1 or VCC2 falls below its threshold. Its push-pull RESET output drives high to VCC1 (min 0.8×VCC1 at 800µA) and low to ≤0.4V (at 3.2mA sink), eliminating external pullup requirements.
Reset assertion is sustained for a guaranteed 150ms (min) timeout after all monitored supplies recover; the internal timer restarts if either supply dips again before timeout completion. A dedicated MR input with 1.5kΩ internal pullup enables system-initiated reset with 1µs minimum pulse width and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±75mV - precisely monitors 3.3V I/O rails with margin for tolerance and drift |
| VCC2 Threshold | 1.665V ±42mV - supports 1.8V/1.6V core supplies in modern low-power µPs |
| Reset Timeout | 150ms (min) - ensures µP completes power-on initialization before release |
| Supply Current | 6µA typical - enables multi-year battery life in portable equipment |
| RESET Output Type | Push-pull - eliminates need for external pullup resistor, simplifies BOM |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive-adjacent embedded applications |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint saves PCB space vs. SOT23 |
Pinout & Package
MAX6737XKZWD3+ uses a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch) with exposed pad for thermal performance. Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is MR (active-low manual reset), Pin 4 is VCC2 (secondary supply input), and Pin 5 is VCC1 (primary supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly; no external pullup needed; logic-high = reset deasserted |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - MR | Active-low manual reset input | Pull to GND ≥1µs to force RESET low; internal 1.5kΩ pullup to VCC1 allows floating if unused |
| 4 - VCC2 | Secondary supply voltage monitor input | Monitors core supply (e.g., 1.8V/1.6V); threshold fixed at 1.665V; valid down to 1.0V |
| 5 - VCC1 | Primary supply voltage monitor input | Monitors I/O supply (e.g., 3.3V); threshold fixed at 3.075V; operates from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage supervision | Simultaneously monitors 3.3V I/O and 1.8V/1.6V core rails without external resistors or calibration |
| Push-pull RESET output | Reduces component count by eliminating external pullup; compatible with bidirectional µP reset pins via 4.7kΩ series resistor |
| 150ms reset timeout | Guarantees sufficient hold time for µP internal clocks, PLL lock, and memory initialization sequences |
| 6µA quiescent current | Enables >10-year battery life in coin-cell–powered IoT sensors and wearables |
| SC70-5 package | Reduces board area by 40% vs. SOT23-5 while maintaining hand-solderability and reflow compatibility |
Applications
| Battery-Powered Portable Devices | Multivoltage Microprocessor Systems |
|---|---|
Use Scenario: Power management in handheld GPS units with separate 3.3V RF front-end and 1.8V baseband processor. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset assertion across both voltage domains during cold start or brownout. Use Value: Prevents partial initialization that could cause RF lock failure or corrupted NMEA data output. | Use Scenario: Industrial controller using dual-rail ASIC with 3.3V I/O and 1.6V core, requiring strict power-up sequencing. IC Role / Device Role / Timing Role: Monitors both rails independently and holds reset until both exceed thresholds for ≥150ms. Use Value: Eliminates need for discrete RC timing networks or secondary supervisors, reducing BOM cost and layout complexity. |
| POS Terminal Power Integrity | Medical Sensor Node Supervision |
Use Scenario: Point-of-sale terminal powered by USB-C PD (5V→3.3V/1.8V DC-DC) with battery backup. IC Role / Device Role / Timing Role: Detects undervoltage on either rail during AC dropout or battery depletion and triggers controlled shutdown. Use Value: Avoids EEPROM corruption during transaction writes by asserting reset before VCC2 collapses below 1.6V. | Use Scenario: Wearable ECG sensor with coin-cell battery, ultra-low-power MCU, and analog front-end. IC Role / Device Role / Timing Role: Provides fail-safe reset at 3.075V/1.665V thresholds while consuming only 6µA continuously. Use Value: Extends operational lifetime beyond 3 years on CR2032 by minimizing supervisory overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKZWD3+ | Open-drain RESET output; requires external pullup resistor | Compatible in same SC70-5 footprint but needs additional 10kΩ pullup for µP interface | Select when interfacing with open-collector systems or where RESET must drive multiple loads |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 input; 200ms timeout; 1.6µA IQ | Cannot monitor dual rails - requires second device for core supply supervision | Choose only for single-rail designs where lowest quiescent current is critical and dual monitoring is unnecessary |
Compared with MAX6736XKZWD3+, the MAX6737XKZWD3+ eliminates external pullup components and simplifies layout; versus TPS3808G33DBVR, it provides true dual-rail supervision in one IC, avoiding timing skew and BOM duplication in multivoltage systems.
Availability
MAX6737XKZWD3+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6737XKZWD3+ 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 management, sensing, and connectivity in demanding industrial and portable applications.
The MAX6736–MAX6745 product line delivers ultra-low-power dual/triple-voltage µP supervisors optimized for battery longevity and compact PCB layouts in handheld, medical, and IoT edge devices.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKZWD3+?
The MAX6737XKZWD3+ has factory-trimmed reset thresholds of 3.075V for VCC1 and 1.665V for VCC2, with tolerances of ±75mV and ±42mV respectively over the full -40°C to +85°C temperature range. These values are encoded in the "ZW" suffix per Maxim's ordering guide and are confirmed in Table 1 of the official datasheet.
Does the MAX6737XKZWD3+ require an external pullup resistor on the RESET pin?
No, the MAX6737XKZWD3+ features a push-pull RESET output, so no external pullup resistor is required. It actively drives high to ≥0.8×VCC1 (at 800µA source) and low to ≤0.4V (at 3.2mA sink). This distinguishes it from open-drain variants like MAX6736XKZWD3+, which do require a pullup.
What is the reset timeout period for the MAX6737XKZWD3+ and how is it determined?
The MAX6737XKZWD3+ has a minimum reset timeout period of 150ms, indicated by the "D3" suffix in its part number. This timeout begins after both VCC1 and VCC2 rise above their respective thresholds and is guaranteed across temperature and supply voltage. The actual timeout may extend up to 300ms per datasheet specifications.
Can the MAX6737XKZWD3+ monitor a 1.2V core supply?
No - the MAX6737XKZWD3+ has fixed thresholds of 3.075V and 1.665V, and its VCC2 input is specified to operate down to 1.0V but monitors only at the factory-set 1.665V level. For 1.2V core supervision, consider the MAX6737XKVWD3+ (1.575V VCC2 threshold) or adjustable variants like MAX6738.
Is the MAX6737XKZWD3+ RoHS-compliant and lead-free?
Yes, the "+" suffix in MAX6737XKZWD3+ explicitly denotes lead-free, RoHS-compliant packaging per Maxim Integrated's ordering nomenclature. It uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for standard reflow processes.
MAX6737XKZWD3+ 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.665V, 2.313V
- 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
MAX6737XKZWD3+ FAQ
1.How can I place an order for MAX6737XKZWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKZWD3+ 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 MAX6737XKZWD3+ reliable?
The price and inventory of MAX6737XKZWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKZWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6737XKZWD3+?
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4.How is shipping managed for MAX6737XKZWD3+?
MAX6737XKZWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKZWD3+ 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 MAX6737XKZWD3+?
For technical support, including MAX6737XKZWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKZWD3+ requirements.
6.How does Aetrix verify that MAX6737XKZWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6737XKZWD3+ 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 MAX6737XKZWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6737XKZWD3+?
All MAX6737XKZWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKZWD3+, 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 MAX6737XKZWD3+ part is unused and in its original packaging.
Return procedure for MAX6737XKZWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6737XKZWD3+ Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
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MCP111T-300E/TT
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MCP120T-315I/TT
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