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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:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,142
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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 asserts reset when either supply falls below its threshold, maintains reset for ≥150ms after recovery, and draws only 6µA supply current. It is used in portable multivoltage systems such as GPS equipment and PDAs to ensure reliable power-on initialization.
For engineers reviewing the MAX6737XKSFD3 datasheet, MAX6737XKSFD3 pinout, MAX6737XKSFD3 application, or MAX6737XKSFD3 equivalent, key selection criteria include confirmed dual-supply monitoring capability, push-pull RESET drive strength (VOH ≥ 0.8×VCC1, VOL ≤ 0.4V), 150ms timeout period, SC70-5 package compatibility, and MR debounce timing (tMRP = 150–300ms).
Technical Context
The MAX6737XKSFD3 implements two independent voltage comparators with precision internal references (VTH1 = 2.925V, VTH2 = 2.188V) and a shared reset timeout timer. Its push-pull RESET output eliminates need for external pullup and drives high to ≥0.8×VCC1 (ISOURCE = 800µA) and low to ≤0.4V (ISINK = 3.2mA).
It features an internal 1.5kΩ MR pullup resistor, supports manual reset assertion via MR low pulse ≥1µs, and guarantees valid RESET state while either VCC1 or VCC2 remains above 1.2V - enabling robust operation during brownout conditions in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±0.075V over -40°C to +85°C - sets primary I/O supply reset point |
| VCC2 Threshold | 2.188V ±0.075V over -40°C to +85°C - sets secondary core supply reset point |
| Reset Timeout | 150ms minimum - ensures µP completes power-up sequence before release |
| Supply Current | 6µA typical at +25°C - enables multi-year battery life in portable devices |
| RESET Output Type | Push-pull active-low - eliminates external pullup, drives high to ≥0.8×VCC1 |
| MR Input Logic | Active-low with 1.5kΩ internal pullup - simplifies momentary switch interface |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive-adjacent environments |
Pinout & Package
MAX6737XKSFD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm, 0.65mm pitch), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly; no external pullup required; VOH ≥ 0.8×VCC1, VOL ≤ 0.4V |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators, timer, and output stage |
| 3 - MR | Manual reset input (active low) | Pulled up internally to VCC1 via 1.5kΩ; accepts CMOS logic or switch-to-GND |
| 4 - VCC2 | Secondary supply monitor input | Connects to core voltage rail (e.g., 2.188V threshold); comparator input referenced to internal 2.188V bandgap |
| 5 - VCC1 | Primary supply monitor input | Connects to I/O voltage rail (e.g., 2.925V threshold); powers internal circuitry and defines RESET high level |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage supervision | Simultaneously monitors VCC1 (2.925V) and VCC2 (2.188V) without external resistors |
| Push-pull RESET output | Eliminates need for external pullup resistor and reduces BOM count in compact layouts |
| 150ms reset timeout | Guarantees sufficient hold time for slow-ramping supplies and µP internal clocks |
| 6µA quiescent current | Enables >10-year battery life in always-on monitoring applications (e.g., backup GPS modules) |
| MR input with internal pullup | Reduces external component count and PCB footprint for manual reset implementation |
Applications
| Portable GPS Receivers | Handheld PDAs |
|---|---|
Use Scenario: Battery-powered GPS module requiring stable dual-rail startup under variable temperature and aging battery voltage. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RESET until both 2.925V I/O and 2.188V core rails stabilize post-power-on. Use Value: Prevents firmware lockup by enforcing 150ms minimum reset hold time even during marginal 2.5V battery discharge. | Use Scenario: PDA with separate 3.0V I/O and 2.2V processor core supplies powered from single Li-ion cell via DC/DC converters. IC Role / Device Role / Timing Role: Monitors both rails independently and releases RESET only after both exceed thresholds for full timeout period. Use Value: Ensures deterministic boot sequence across operating temperature (-40°C to +85°C) with <6µA static draw. |
| Industrial Data Loggers | Medical Wearables |
Use Scenario: Remote sensor node logging environmental data using ultra-low-power µC and flash memory. IC Role / Device Role / Timing Role: Supervises main 3.0V system rail and 2.2V analog front-end supply; provides MR-triggered reset for field firmware updates. Use Value: Internal 1.5kΩ MR pullup enables direct connection to tactile switch - no added passive components. | Use Scenario: ECG patch with coin-cell battery, requiring guaranteed reset on voltage sag during RF transmission bursts. IC Role / Device Role / Timing Role: Detects drop below 2.925V (VCC1) or 2.188V (VCC2) and holds RESET for ≥150ms to prevent partial register writes. Use Value: 6µA ICC1 allows continuous supervision without compromising multi-week battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6736XKSFD3 | Open-drain RESET output; requires external pullup resistor | Suitable where µP reset pin is bidirectional or open-drain compatible | Select when system already includes pullup or uses µP with open-drain reset I/O |
| TPS3808G18DBVR | Single-supply supervisor (1.8V threshold only); no VCC2 monitor | Lacks dual-rail capability; requires additional IC for second supply monitoring | Choose only if monitoring one rail suffices and board area permits extra component |
Compared with MAX6736XKSFD3, the MAX6737XKSFD3 eliminates external pullup needs via push-pull output, reducing component count and layout complexity. Against TPS3808G18DBVR, it delivers true dual-supply supervision in a single SC70-5 device - critical for space-constrained multivoltage systems.
Availability
MAX6737XKSFD3 is available at Aetrix Electronics and suitable for portable GPS receivers, handheld PDAs, and industrial data loggers requiring stable component supply with guaranteed -40°C to +85°C operation and long-term production continuity.
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 connectivity applications.
The MAX6736–MAX6745 family was engineered specifically for low-power dual-/triple-voltage microprocessor supervision in battery-operated and space-constrained systems - emphasizing ultra-low ICC, factory-trimmed accuracy, and minimal external components.
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, specified over the full -40°C to +85°C temperature range with ±0.075V tolerance. These values are encoded in the "KS" suffix per Table 1 of the datasheet and do not require external resistor networks.
Does the MAX6737XKSFD3 require an external pullup resistor on the RESET pin?
No, the MAX6737XKSFD3 features a push-pull RESET output, eliminating the need for an external pullup resistor. It actively drives high to ≥0.8×VCC1 (with 800µA source capability) and low to ≤0.4V (with 3.2mA sink capability), enabling direct connection to most µP reset inputs.
What is the minimum pulse width required on the MR pin to trigger reset on the MAX6737XKSFD3?
The MAX6737XKSFD3 requires a minimum MR low pulse width of 1µs to initiate reset assertion. The internal MR circuit includes 100ns glitch rejection, ensuring noise immunity, and the reset remains active for the full 150ms timeout period after MR returns high.
Can the MAX6737XKSFD3 monitor voltages below 1.0V, such as a 0.9V core supply?
No - the MAX6737XKSFD3 is configured for fixed dual thresholds (2.925V and 2.188V) and does not support sub-1.0V monitoring. For 0.9V core supplies, consider the MAX6740/MAX6743 series with RSTIN input (threshold = 0.488V) or the MAX6742/MAX6745 with PFI input, both of which enable monitoring down to 0.468V.
What package type and dimensions does the MAX6737XKSFD3 use?
The MAX6737XKSFD3 is supplied in a 5-pin SC70-5 package measuring 2.0mm × 1.25mm × 0.9mm with 0.65mm lead pitch. This ultra-small outline supports high-density PCB layouts in portable electronics and conforms to JEDEC MO-203-AB standards.
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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