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Analog Devices Inc./Maxim Integrated MAX6741XKSHD3
- Part No.:
- MAX6741XKSHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6741XKSHD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
The MAX6741XKSHD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output, power-OK (POK1) output, and factory-trimmed reset thresholds of 2.925V (VCC1) and 2.188V (VCC2). It monitors two independent supply rails, asserts reset if either falls below its threshold, maintains reset for ≥150ms after recovery, and operates from -40°C to +85°C in a 5-pin SC70 package. It is used in multivoltage portable systems requiring precise power sequencing.
For engineers reviewing the MAX6741XKSHD3 datasheet, MAX6741XKSHD3 pinout, MAX6741XKSHD3 application, or MAX6741XKSHD3 equivalent, key selection criteria include VCC1/VCC2 threshold pairing, POK1 timing (37.5–75ms), 6µA quiescent current, SC70 footprint constraints, and compatibility with bidirectional µP reset I/O interfaces.
Technical Context
The MAX6741XKSHD3 implements dual independent voltage monitoring with precision internal references (±1.5% over temperature) and a dedicated open-drain POK1 output that deasserts only after VCC1 exceeds 2.925V for ≥37.5ms. Its reset logic combines VCC1 and VCC2 comparators with an internal timeout counter that restarts on any threshold violation.
It features a push-pull RESET output referenced to VCC1, eliminating external pull-up requirements, and supports power-supply sequencing by enabling VCC2 regulation only after POK1 asserts - critical for I/O-before-core startup in dual-rail processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±1.5% - sets primary supply valid level for POK1 assertion and reset release |
| VCC2 Threshold | 2.188V ±1.5% - defines secondary supply minimum before system reset triggers |
| Reset Timeout | 150ms min - ensures µP remains held in reset long enough for stable power rail settling |
| POK1 Timeout | 37.5ms min - guarantees VCC1 stability before enabling downstream VCC2 regulator |
| Supply Current | 6µA typical - enables battery life extension in always-on portable equipment |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin-temperature environments |
| Package | 5-pin SC70 (2.0mm × 1.25mm) - ultra-compact footprint for space-constrained PCB layouts |
Pinout & Package
MAX6741XKSHD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for high-density portable designs. Pin assignments are validated per Maxim's official pin configuration diagram for MAX6741.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pull-up; sinks/source current per VCC1 |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and outputs |
| 3 - VCC2 | Secondary supply monitor input | Connects to core or auxiliary rail; triggers reset if <2.188V |
| 4 - POK1 | Open-drain power-OK output (active-high) | Signals VCC1 stability; used to enable VCC2 regulator after 37.5ms delay |
| 5 - VCC1 | Primary supply monitor input & power rail | Supplies internal circuitry and defines POK1 trip point at 2.925V |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold monitoring | Simultaneously supervises VCC1 (2.925V) and VCC2 (2.188V) with independent comparators |
| VCC1 Power-OK (POK1) output | Enables controlled power sequencing: VCC2 activation only after VCC1 stabilizes for ≥37.5ms |
| Push-pull RESET output | Eliminates need for external pull-up resistor, reducing BOM count and layout complexity |
| Ultra-low 6µA supply current | Extends battery runtime in handheld devices and IoT edge nodes operating in sleep mode |
| SC70-5 package | Minimizes PCB area (2.5mm²) while maintaining thermal performance up to +85°C |
Applications
| Portable Medical Monitors | Notebook Power Management |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring reliable startup and brownout protection across dual-rail analog/digital subsystems. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring both 3.0V analog front-end and 1.8V digital processor rails are stable before release from reset. Use Value: Prevents firmware corruption during low-battery transitions using 6µA quiescent current and 150ms reset hold time. | Use Scenario: Sequencing I/O (3.3V) and core (1.2V) supplies in ultrabook platforms with strict ramp-time requirements. IC Role / Device Role / Timing Role: POK1 output gates VCC2 enable signal, enforcing I/O-first sequencing with 37.5ms validation window. Use Value: Eliminates need for discrete RC timing networks or secondary supervisors, reducing component count by one IC. |
| Industrial PLC I/O Modules | POS Terminal Power Control |
Use Scenario: DIN-rail mounted controller with isolated 24V-to-5V/3.3V conversion where supply transients must not cause spurious resets. IC Role / Device Role / Timing Role: Monitors both 5V logic and 3.3V FPGA rails; restarts reset timer on any threshold breach for robust glitch immunity. Use Value: Achieves >100µs transient immunity at 100mV overdrive, verified per MAX6736–45 toc05 graph. | Use Scenario: Retail point-of-sale terminal with coin-cell backup and main 5V USB power, requiring orderly shutdown on main supply loss. IC Role / Device Role / Timing Role: Uses POK1 as enable signal for backup regulator; RESET halts processor before VCC2 collapse. Use Value: Enables deterministic state save via µP interrupt before power failure, leveraging guaranteed reset assertion below 2.188V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6744XKSHD3 | Same thresholds (2.925V/2.188V) and timing, but push-pull RESET instead of open-drain | Compatible in same PCB layout; differs only in RESET drive type - no change to sequencing logic | Select MAX6744XKSHD3 when µP reset pin requires push-pull drive without external pull-up |
| TPS3808G33DBVR | Single-supply (3.3V only), no POK output, 200ms timeout, SOT-23-6 package | Lacks dual-rail monitoring and sequencing capability; requires separate POK generation | Use only if monitoring only one rail and external sequencing control is acceptable |
Compared with MAX6741XKSHD3, MAX6744XKSHD3 offers identical supervision functionality with push-pull RESET, while TPS3808G33DBVR provides lower-cost single-rail supervision but cannot replace POK-based sequencing - making MAX6741XKSHD3 irreplaceable in dual-rail sequenced systems.
Availability
MAX6741XKSHD3 is available at Aetrix Electronics and suitable for portable medical monitors, notebook power management, industrial PLC I/O modules, and POS terminal power control requiring stable component supply across extended product lifecycles.
Supply support for MAX6741XKSHD3 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 interface applications.
The MAX6736–MAX6745 family delivers low-power, space-efficient µP supervision for multivoltage portable and embedded systems, emphasizing sequencing integrity, battery longevity, and SC70 footprint optimization.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKSHD3?
The MAX6741XKSHD3 has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as defined by the "SH" suffix per Maxim's Table 1. These values are guaranteed over -40°C to +85°C with ±1.5% tolerance and serve as the trip points for both RESET assertion and POK1 deassertion logic in the MAX6741XKSHD3.
Does the MAX6741XKSHD3 provide power-supply sequencing capability?
Yes, the MAX6741XKSHD3 provides dedicated power-supply sequencing via its open-drain POK1 output. POK1 remains low until VCC1 exceeds 2.925V for ≥37.5ms, then goes high to enable downstream regulators - enabling reliable I/O-before-core or core-before-I/O sequencing depending on threshold selection in the MAX6741XKSHD3.
What is the function of the POK1 pin on the MAX6741XKSHD3?
The POK1 pin on the MAX6741XKSHD3 is an open-drain active-high power-OK output. It stays low while VCC1 is below 2.925V, then transitions high after VCC1 remains above threshold for ≥37.5ms. This signal is used to gate enable inputs of secondary DC/DC converters, ensuring proper power-up sequence in dual-rail systems using the MAX6741XKSHD3.
Is an external pull-up resistor required for the RESET output of the MAX6741XKSHD3?
No, the MAX6741XKSHD3 features a push-pull RESET output, so no external pull-up resistor is needed. The output actively drives high (to VCC1) and low (to GND), simplifying interface design with µPs having bidirectional reset pins - unlike open-drain variants that require external pull-ups in the MAX6741XKSHD3 family.
What is the guaranteed reset timeout period for the MAX6741XKSHD3?
MAX6741XKSHD3 guarantees a minimum reset timeout period of 150ms (D3 suffix), beginning after all monitored supplies (VCC1 and VCC2) exceed their respective thresholds. This hold time ensures the microprocessor completes power stabilization before release, and is fully characterized across -40°C to +85°C for the MAX6741XKSHD3.
MAX6741XKSHD3 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:
- Open Drain or Open Collector
- 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
MAX6741XKSHD3 FAQ
1.How can I place an order for MAX6741XKSHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6741XKSHD3 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 MAX6741XKSHD3 reliable?
The price and inventory of MAX6741XKSHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6741XKSHD3 is usually 5 days.
3.What payment methods are accepted for MAX6741XKSHD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6741XKSHD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6741XKSHD3?
MAX6741XKSHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6741XKSHD3 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 MAX6741XKSHD3?
For technical support, including MAX6741XKSHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6741XKSHD3 requirements.
6.How does Aetrix verify that MAX6741XKSHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6741XKSHD3 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 MAX6741XKSHD3 meets industry standards.
7.What is the process for return or replacement of MAX6741XKSHD3?
All MAX6741XKSHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6741XKSHD3, 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 MAX6741XKSHD3 part is unused and in its original packaging.
Return procedure for MAX6741XKSHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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