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Analog Devices Inc./Maxim Integrated MAX6741XKWGD3
- Part No.:
- MAX6741XKWGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6741XKWGD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
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Inventory:1,642
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Product details
Overview
MAX6741XKWGD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output, VCC1 power-OK (POK1) open-drain output, and factory-trimmed reset thresholds of 3.075V (VCC1) and 1.665V (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 dual-rail power sequencing for portable processors requiring I/O-before-core startup.
For engineers reviewing the MAX6741XKWGD3 datasheet, MAX6741XKWGD3 pinout, MAX6741XKWGD3 application, or MAX6741XKWGD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, POK1 timing behavior, dual-threshold monitoring capability, and real-world sequencing use cases - all confirmed from Maxim's official datasheet (19-2531 Rev 2).
Technical Context
The MAX6741XKWGD3 implements two independent voltage comparators with precision internal references (4.625V–0.752V range), each feeding a shared reset timeout timer. Its POK1 output activates after VCC1 exceeds 3.075V for ≥37.5ms, enabling controlled turn-on of VCC2 via external logic or DC/DC enable pin - decoupling sequencing from reset assertion timing.
Reset assertion is edge-triggered on falling VCC1/VCC2 and includes 0.5% hysteresis to reject transients; the 150ms minimum timeout (D3 suffix) is temperature-stable across –40°C to +85°C with ±5% variation. No manual reset input is present - unlike MAX6736–MAX6739 - and RSTIN/PFI/POK1 functions are mutually exclusive per variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±2.5% over –40°C to +85°C - sets primary I/O supply valid point for sequencing |
| VCC2 Threshold | 1.665V ±2.5% over –40°C to +85°C - monitors core supply with guaranteed operation down to 0.9V |
| Reset Timeout | 150ms min (D3 suffix) - ensures µP remains held in reset long enough for stable power ramp-up |
| POK1 Timeout | 37.5ms min - provides clean, glitch-free enable signal to secondary regulator after VCC1 stabilization |
| Supply Current | 6µA typical at +25°C - enables integration into battery-powered systems without measurable drain |
| Operating Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SC70-5 - 2.0mm × 1.25mm footprint, compatible with high-density PCB layouts |
Pinout & Package
MAX6741XKWGD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2 (secondary supply input), Pin 4 is POK1 (open-drain active-high power-OK), 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 without external pullup; sinks 3.2mA / sources 800µA at VCC1 ≥ 4.25V |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and outputs; must be low-impedance |
| 3 - VCC2 | Secondary supply monitor input | Monitors core rail (0.9V–3.3V); reset asserted if VCC2 < 1.665V; no internal regulation |
| 4 - POK1 | Open-drain active-high power-OK output | Signals VCC1 stability after 37.5ms delay; requires external pullup to enable VCC2 sequencing control |
| 5 - VCC1 | Primary supply monitor input & power rail | Powers internal circuitry and sets POK1 reference; monitors I/O rail (1.8V–5.0V) at 3.075V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC1 (3.075V) and VCC2 (1.665V) with separate comparators and shared reset logic |
| VCC1 Power-OK (POK1) output | Provides dedicated sequencing signal with 37.5ms delay - isolates enable timing from reset assertion window |
| Low-power operation | 6µA ICC1 draw enables >10-year battery life in always-on supervisory roles (e.g., RTC backup domains) |
| SC70-5 package | 2.0mm × 1.25mm footprint reduces board area by >60% vs. SOT23-5 while maintaining thermal performance |
| Transient-immune reset | 0.5% hysteresis and 35µs propagation delay reject sub-100µs supply glitches without false triggering |
Applications
| Power-Supply Sequencing | Portable Microprocessor Systems |
|---|---|
Use Scenario: Dual-rail processor (e.g., ARM Cortex-A series) requiring I/O supply (VCC1) to stabilize before enabling core supply (VCC2). IC Role / Device Role / Timing Role: MAX6741XKWGD3 monitors VCC1 and asserts POK1 only after 37.5ms of valid voltage, enabling VCC2 regulator via external MOSFET or enable pin. Use Value: Prevents core logic corruption during asymmetric power ramp-up; eliminates need for discrete RC timing networks or additional supervisors. | Use Scenario: GPS module or handheld medical device with Li-ion battery and dual-voltage SoC. IC Role / Device Role / Timing Role: MAX6741XKWGD3 supervises 3.3V I/O rail and 1.8V core rail, asserting reset until both exceed thresholds for ≥150ms post-power-on. Use Value: Guarantees reliable boot under brown-out conditions; 6µA quiescent current extends battery runtime without compromising supervision integrity. |
| Notebook Embedded Controllers | Industrial Sensor Nodes |
Use Scenario: EC (Embedded Controller) managing keyboard, touchpad, and battery charging in ultrabooks. IC Role / Device Role / Timing Role: MAX6741XKWGD3 provides fail-safe reset to EC during AC adapter disconnect or battery sag, using POK1 to gate auxiliary 1.2V LDO activation. Use Value: Enables graceful suspend-to-RAM transitions; POK1 independence from reset logic allows concurrent power management decisions. | Use Scenario: Wireless sensor node powered by energy harvesting (e.g., solar + supercapacitor) with variable VCC1 ramp profiles. IC Role / Device Role / Timing Role: MAX6741XKWGD3 monitors harvested 3.075V rail and regulated 1.665V core rail, holding MCU in reset until both supplies meet timing and voltage criteria. Use Value: Eliminates premature wake-up or code execution during unstable charge cycles; SC70-5 size fits compact PCBs with minimal layout 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 |
|---|---|---|---|
| MAX6744XKWGD3 | Identical thresholds (3.075V/1.665V), same D3 timeout, but push-pull RESET instead of open-drain - no external pullup required | Same sequencing use case, but simplifies design where µP reset pin accepts direct push-pull drive | Select MAX6744XKWGD3 if µP reset pin lacks internal pullup and board space prohibits external resistor |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no POK1 output; 350ms timeout; 1.8µA supply current | Lacks dual-rail monitoring and sequencing capability - suitable only for single-rail systems | Choose TPS3808G33DBVR only when supervising one supply and ultra-low current (<2µA) is critical |
Compared with MAX6741XKWGD3, MAX6744XKWGD3 offers identical supervision functionality with simplified reset interface, while TPS3808G33DBVR trades dual-monitoring and POK1 sequencing for lower current and smaller footprint - making it unsuitable as a drop-in replacement but viable for single-rail cost-sensitive designs.
Availability
MAX6741XKWGD3 is available at Aetrix Electronics and suitable for power-supply sequencing, portable microprocessor systems, notebook embedded controllers, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6741XKWGD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6736–MAX6745 family was designed specifically for multivoltage microprocessor systems needing compact, low-power, dual- or triple-rail supervision with integrated sequencing features like POK1 - targeting portable and space-constrained embedded platforms.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKWGD3?
The MAX6741XKWGD3 has factory-trimmed reset thresholds of 3.075V for VCC1 and 1.665V for VCC2, with ±2.5% tolerance over the full –40°C to +85°C operating temperature range. These values are fixed by the "TW" suffix in the part number and confirmed in Maxim's Table 1 (19-2531 Rev 2). No external adjustment is possible for these inputs.
Does the MAX6741XKWGD3 include a manual reset input (MR)?
No, the MAX6741XKWGD3 does not include a manual reset input. Per the Selector Guide and Pin Description table, MR is only present on MAX6736–MAX6739 variants. The MAX6741XKWGD3 relies solely on monitored supply voltages (VCC1/VCC2) and its internal timer for reset assertion - eliminating MR-related layout and debounce considerations.
What is the function and timing behavior of the POK1 output on the MAX6741XKWGD3?
The POK1 output on the MAX6741XKWGD3 is an open-drain active-high signal that goes high only after VCC1 exceeds 3.075V for a minimum of 37.5ms (tPOKP). It remains independent of VCC2 status and MR state. This enables precise control of secondary supply enable timing - for example, driving the EN pin of a DC/DC converter to enforce I/O-before-core sequencing.
Can the MAX6741XKWGD3 monitor voltages below 0.9V?
No, the MAX6741XKWGD3 cannot monitor voltages below 0.9V on VCC2. Its VCC2 input is specified for 0.9V to 3.3V operation, and the 1.665V threshold is fixed. While other family members (e.g., MAX6738/MAX6739) support adjustable RSTIN monitoring down to 0.488V, the MAX6741XKWGD3 lacks RSTIN functionality - its third pin is VCC2, not RSTIN or PFI.
What package type and dimensions does the MAX6741XKWGD3 use?
The MAX6741XKWGD3 uses a 5-pin SC70-5 package measuring 2.0mm × 1.25mm with 0.65mm lead pitch. This ultra-small outline is RoHS-compliant and supports reflow soldering. Pin 1 is RESET, Pin 2 is GND, Pin 3 is VCC2, Pin 4 is POK1, and Pin 5 is VCC1 - matching the top-view SC70 configuration shown in Figure 15 of the datasheet.
MAX6741XKWGD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6741XKWGD3 FAQ
1.How can I place an order for MAX6741XKWGD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6741XKWGD3 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 MAX6741XKWGD3 reliable?
The price and inventory of MAX6741XKWGD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6741XKWGD3 is usually 5 days.
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MAX6741XKWGD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6741XKWGD3 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 MAX6741XKWGD3?
For technical support, including MAX6741XKWGD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6741XKWGD3 requirements.
6.How does Aetrix verify that MAX6741XKWGD3 is sourced from the original manufacturer or authorized distributors?
All MAX6741XKWGD3 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 MAX6741XKWGD3 meets industry standards.
7.What is the process for return or replacement of MAX6741XKWGD3?
All MAX6741XKWGD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6741XKWGD3, 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 MAX6741XKWGD3 part is unused and in its original packaging.
Return procedure for MAX6741XKWGD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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