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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:
- POWER SUPPLY SUPPORT CIRCUIT, FI
- Quantity:
- Payment:
- Shipping:
Inventory:401
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Product details
Overview
The MAX6741XKSHD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull RESET and open-drain VCC1 Power-OK (POK1) output, factory-trimmed reset thresholds of 2.925V (VCC1) and 2.188V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package - designed for power-supply sequencing in portable multivoltage systems.
For engineers reviewing the MAX6741XKSHD3+ datasheet, MAX6741XKSHD3+ pinout, MAX6741XKSHD3+ application, or MAX6741XKSHD3+ equivalent, key selection criteria include VCC1/VCC2 threshold pairing, POK1 timing for supply enable control, push-pull vs. open-drain RESET configuration, -40°C to +85°C operation, and SC70 footprint compatibility with space-constrained designs.
Technical Context
The MAX6741XKSHD3+ monitors two independent supply rails (VCC1 and VCC2) using precision internal voltage references, asserting RESET when either falls below its factory-set threshold and maintaining it for ≥150ms after both return above threshold. Its dedicated POK1 output deasserts after VCC1 exceeds 2.925V for ≥37.5ms, enabling controlled turn-on of downstream supplies.
This device implements a deterministic reset state machine with no external timing components, integrates MR debounce logic, and guarantees valid RESET output down to VCC1 = 1.2V. It uses BiCMOS process technology and features <10nA RSTIN/PFI input leakage, supporting high-impedance external resistor dividers for low-power monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% (factory-trimmed; enables reliable I/O supply monitoring at 3.0V nominal) |
| VCC2 Threshold | 2.188V ±2.5% (factory-trimmed; supports core supply monitoring at 2.2V nominal) |
| Reset Timeout | 150ms min (guaranteed hold time ensures µP initialization completes before release) |
| POK1 Timeout | 37.5ms min (delays VCC2 enable until VCC1 stabilizes, enforcing safe power-up sequence) |
| Supply Current | 6µA max (enables battery life extension in always-on portable equipment) |
| Operating Temp | -40°C to +85°C (qualified for industrial and automotive cabin applications) |
| Package | SC70-5 (1.6mm × 1.6mm footprint; compatible with high-density PCB layouts) |
Pinout & Package
MAX6741XKSHD3+ is housed in a 5-pin SC70 package (1.6mm × 1.6mm × 0.9mm height) with gull-wing leads, rated for -40°C to +85°C operation and RoHS-compliant lead-free finish (+T suffix).
| 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 ≥ 4.75V |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output drivers; must be low-impedance |
| 3 - VCC2 | Secondary supply monitor input | Monitors core voltage rail; asserts RESET if VCC2 drops below 2.188V |
| 4 - POK1 | Open-drain VCC1 Power-OK output | Active-high signal (requires external pullup); enables VCC2 regulator only after VCC1 stabilizes for ≥37.5ms |
| 5 - VCC1 | Primary supply monitor input & power rail | Supplies internal circuitry and sets POK1/VTH1 reference; monitors I/O rail at 2.925V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Simultaneous monitoring of VCC1 (2.925V) and VCC2 (2.188V) eliminates need for discrete comparators or dual supervisors |
| VCC1 Power-OK (POK1) output | Enables precise, glitch-immune sequencing of secondary supplies without external timing components |
| 150ms reset timeout | Guarantees µP reset assertion long enough for full oscillator startup and register initialization |
| 6µA quiescent current | Reduces battery drain in standby mode - critical for coin-cell–powered IoT sensors and wearables |
| SC70-5 package | Minimizes board area vs. SOT23-5; maintains thermal performance up to +85°C ambient |
Applications
| Portable Power Sequencing | Notebook Core/I/O Startup |
|---|---|
|
Use Scenario: Battery-powered handheld device requiring I/O supply (3.0V) to stabilize before enabling 2.2V core logic. IC Role / Device Role / Timing Role: MAX6741XKSHD3+ monitors VCC1 (3.0V I/O rail) and VCC2 (2.2V core rail), using POK1 to gate the core DC/DC converter enable. Use Value: Prevents core logic corruption during brown-out by enforcing strict VCC1-first power-up order with 37.5ms POK1 delay. |
Use Scenario: Dual-rail notebook motherboard where CPU core voltage must ramp after chipset I/O voltage. IC Role / Device Role / Timing Role: MAX6741XKSHD3+ acts as sequencer and fault detector: POK1 enables core VRM only after VCC1 reaches 2.925V; RESET halts boot on any rail collapse. Use Value: Eliminates need for discrete RC timing networks and reduces BOM count while ensuring JEDEC-compliant power sequencing. |
| Industrial Controller Reset Management | POS Terminal Supply Monitoring |
|
Use Scenario: Programmable logic controller exposed to 12V DC field wiring with risk of transient-induced undervoltage. IC Role / Device Role / Timing Role: MAX6741XKSHD3+ supervises 3.3V logic supply (VCC1) and 2.5V FPGA configuration rail (VCC2), asserting RESET on sub-threshold dips >150ms. Use Value: 6µA supply current extends backup battery runtime; SC70 package fits tight PLC module spacing. |
Use Scenario: Point-of-sale terminal with separate 5V peripheral bus and 3.3V main processor, subject to hot-plug transients. IC Role / Device Role / Timing Role: MAX6741XKSHD3+ monitors VCC1 (5V bus) and VCC2 (3.3V CPU), using push-pull RESET to drive processor reset pin directly. Use Value: Push-pull output avoids external pullup resistor, reducing component count and improving noise immunity on shared reset bus. |
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+ | Identical thresholds (2.925V/2.188V) and timing, but push-pull RESET instead of open-drain POK1 - POK1 is replaced by push-pull RESET | No POK1 output; cannot perform VCC1-to-VCC2 sequencing - suitable only where RESET assertion alone suffices | Select MAX6744XKSHD3+ only if system requires push-pull RESET and does not use POK1 for supply enable control |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold only); no dual-rail monitoring or POK output; 350ms timeout; SOT23-6 package | Cannot replace dual-monitoring function; requires additional ICs to supervise both VCC1 and VCC2 rails | Choose TPS3808G15DBVR only for single-rail applications where cost-per-channel is prioritized over integration |
Compared with MAX6744XKSHD3+, the MAX6741XKSHD3+ provides essential POK1 sequencing capability absent in the alternative; versus TPS3808G15DBVR, it delivers integrated dual-rail supervision and sequencing in half the board area, justifying its use in compact multivoltage systems.
Availability
MAX6741XKSHD3+ is available at Aetrix Electronics and suitable for portable equipment, notebook computers, and industrial controllers requiring stable component supply, guaranteed -40°C to +85°C operation, and SC70 footprint compatibility.
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 in industrial, computing, and consumer markets.
The MAX6736–MAX6745 family was developed to replace discrete reset solutions in space- and power-constrained multivoltage systems, delivering dual/triple supervision, sequencing, and fail-safe reset in ultra-small SC70 packages.
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, with ±2.5% tolerance across -40°C to +85°C. These values are encoded in the "SH" suffix per Maxim's ordering guide (Table 1), and are confirmed in the Electrical Characteristics table under VTH1 and VTH2 parameters.
Does the MAX6741XKSHD3+ provide a Power-OK output, and how is it used?
Yes, the MAX6741XKSHD3+ features an open-drain POK1 output on pin 4. It remains low until VCC1 exceeds 2.925V for ≥37.5ms, then goes high (with external pullup) to enable downstream supplies like VCC2. This enforces strict power-up sequencing and is distinct from the RESET signal.
What is the reset timeout period of the MAX6741XKSHD3+, and is it adjustable?
The MAX6741XKSHD3+ has a fixed 150ms minimum reset timeout period (D3 suffix), verified in the Electrical Characteristics table under tRP. This timeout is not user-adjustable - it is factory-programmed and guaranteed over temperature. The D7 variant offers 1200ms, but MAX6741XKSHD3+ specifically uses D3.
Can the MAX6741XKSHD3+ monitor a negative voltage supply?
No, the MAX6741XKSHD3+ does not support direct negative voltage monitoring. Its VCC1, VCC2, and POK1 pins operate referenced to GND and require positive input voltages from 1.0V to 5.5V. Negative supply monitoring requires the MAX6742/MAX6745 variants with PFI/PFO inputs, not present on MAX6741XKSHD3+.
What package type and footprint does the MAX6741XKSHD3+ use?
The MAX6741XKSHD3+ uses a 5-pin SC70 package (also labeled SC70-5), measuring 1.6mm × 1.6mm with 0.9mm height and gull-wing leads. Its pinout matches standard SC70 layout: pin 1 = RESET, pin 2 = GND, pin 3 = VCC2, pin 4 = POK1, pin 5 = VCC1 - confirmed in the Pin Configurations diagram.
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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