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Analog Devices Inc./Maxim Integrated MAX6744XKSYD3
- Part No.:
- MAX6744XKSYD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6744XKSYD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
The MAX6744XKSYD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull reset output and VCC1 power-OK (POK1) output, designed for precise power-supply sequencing in multivoltage systems. It monitors VCC1 at 2.925V and VCC2 at 2.188V with factory-trimmed thresholds, provides 150ms minimum reset timeout, draws only 6µA supply current, and operates over –40°C to +85°C in a 5-pin SC70 package.
For engineers reviewing the MAX6744XKSYD3 datasheet, MAX6744XKSYD3 pinout, MAX6744XKSYD3 application, or MAX6744XKSYD3 equivalent, key selection criteria include its POK1-enabled sequencing capability, dual fixed-threshold supervision, push-pull RESET drive, low quiescent current, and SC70 footprint compatibility with space-constrained portable and battery-powered designs.
Technical Context
The MAX6744XKSYD3 implements independent dual-supply monitoring with precision factory-set thresholds on VCC1 (2.925V) and VCC2 (2.188V), both referenced to internal bandgap references. Its POK1 output asserts high only after VCC1 exceeds 2.925V for 37.5–75.0ms, enabling controlled enablement of downstream supplies like VCC2.
Reset assertion occurs when either monitored supply falls below its threshold or MR is asserted; the push-pull RESET output drives actively high (VOH ≥ 0.8×VCC1) and low (VOL ≤ 0.4V), eliminating external pullup requirements. The device uses BiCMOS process technology and contains 249 transistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±0.075V (factory-trimmed; enables reliable I/O supply monitoring) |
| VCC2 Threshold | 2.188V ±0.075V (factory-trimmed; supports core voltage supervision) |
| Reset Timeout | 150ms min (ensures stable µP initialization before release) |
| POK1 Timeout | 37.5–75.0ms (guarantees VCC1 stabilization before enabling sequenced rail) |
| Supply Current | 6µA max (enables multi-year battery life in portable equipment) |
| Operating Temp | –40°C to +85°C (suitable for industrial and automotive-adjacent embedded use) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; compatible with high-density PCB layouts) |
Pinout & Package
MAX6744XKSYD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm, 0.65mm pitch), optimized for space-constrained applications requiring dual-supply supervision and power-sequencing control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives high (≥0.8×VCC1) and low (≤0.4V) without external pullup; asserts during VCC1/VCC2 undervoltage or MR activation |
| 2 - GND | Ground reference | Common return path for all internal circuits and external decoupling; must be low-impedance |
| 3 - VCC2 | Secondary supply input | Monitors core or auxiliary rail at 2.188V threshold; valid operation requires VCC2 ≥ 1.0V |
| 4 - POK1 | Open-drain active-high power-OK output | Signals VCC1 stability after 37.5–75.0ms delay; requires external pullup to enable VCC2 sequencing |
| 5 - VCC1 | Primary supply input | Monitors I/O or main rail at 2.925V threshold; powers internal circuitry and defines RESET/POK1 logic levels |
Key Features
| Feature | Design Value |
|---|---|
| VCC1 Power-OK (POK1) output | Enables deterministic power-up sequencing by delaying VCC2 enable until VCC1 stabilizes for ≥37.5ms |
| Push-pull RESET output | Eliminates need for external pullup resistor, reducing BOM count and layout area in µP reset paths |
| Dual factory-trimmed thresholds | 2.925V (VCC1) and 2.188V (VCC2) provide precise, production-tested supervision without calibration |
| Ultra-low 6µA supply current | Extends battery runtime in portable devices such as GPS units, PDAs, and handheld medical instruments |
| SC70-5 package | Minimizes PCB real estate while maintaining thermal performance up to +85°C ambient |
Applications
| Power-Supply Sequencing | Portable Equipment Supervision |
|---|---|
Use Scenario: Dual-rail processor system requiring I/O supply (VCC1) to stabilize before enabling core supply (VCC2). IC Role / Device Role / Timing Role: MAX6744XKSYD3 monitors VCC1 and asserts POK1 only after 37.5–75.0ms of valid voltage, triggering VCC2 DC/DC converter enable. Use Value: Prevents core logic corruption during power-up by enforcing strict sequencing timing with no external timing components. | Use Scenario: Battery-powered GPS receiver needing long operational life and robust brownout protection. IC Role / Device Role / Timing Role: MAX6744XKSYD3 supervises both 2.925V I/O and 2.188V core rails, asserting RESET if either drops below threshold during battery discharge. Use Value: 6µA quiescent current extends battery life; dual-threshold detection prevents spurious resets during transient load spikes. |
| Notebook System Reset Control | Industrial Controller Voltage Monitoring |
Use Scenario: Embedded controller in notebook docking station managing multiple voltage domains. IC Role / Device Role / Timing Role: MAX6744XKSYD3 provides push-pull RESET signal to host µP and uses POK1 to coordinate USB/PCIe interface power enable. Use Value: Push-pull output ensures clean, fast-reset assertion without pullup conflicts on bidirectional µP reset pins. | Use Scenario: Programmable logic controller (PLC) module operating in harsh industrial environments. IC Role / Device Role / Timing Role: MAX6744XKSYD3 continuously monitors 2.925V communication bus supply and 2.188V FPGA core supply across –40°C to +85°C. Use Value: Factory-trimmed thresholds maintain accuracy over temperature; SC70 package withstands reflow and vibration stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6741XKSYD3 | Identical pinout, same VCC1/VCC2 thresholds (2.925V/2.188V) and POK1 function, but open-drain RESET output | Requires external pullup resistor; less suitable for direct µP reset I/O without series resistance | Select MAX6744XKSYD3 when push-pull drive is required to avoid pullup components and ensure robust reset signaling |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no POK1 output; 350ms timeout; SOT-23-6 package | Lacks dual-supply monitoring and sequencing capability; cannot replace MAX6744XKSYD3 in two-rail systems | Consider only for single-rail applications where sequencing and dual-threshold supervision are unnecessary |
Compared with MAX6741XKSYD3, the MAX6744XKSYD3 eliminates external pullup needs via push-pull RESET, improving signal integrity; versus TPS3808G33DBVR, it uniquely supports dual-rail sequencing with POK1-making it irreplaceable in coordinated multivoltage power architectures.
Availability
MAX6744XKSYD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply, guaranteed factory-trimmed thresholds, and compact SC70 packaging.
Supply support for MAX6744XKSYD3 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, communications, and consumer applications.
The MAX6736–MAX6745 family was designed specifically for low-power, space-constrained microprocessor supervision in dual- and triple-voltage systems-emphasizing precision thresholding, sequencing control, and ultra-low quiescent current.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6744XKSYD3?
The MAX6744XKSYD3 has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as indicated by the "SY" suffix per Table 1 in the datasheet. These values are guaranteed over –40°C to +85°C with ±0.075V tolerance, enabling precise supervision of I/O and core rails without external adjustment.
Does the MAX6744XKSYD3 require an external pullup resistor on the RESET pin?
No, the MAX6744XKSYD3 features a push-pull RESET output, which actively drives both high (≥0.8×VCC1) and low (≤0.4V). Unlike open-drain variants such as MAX6741XKSYD3, it does not require an external pullup resistor-reducing component count and simplifying µP reset interface design.
What is the function and timing behavior of the POK1 output on the MAX6744XKSYD3?
The POK1 output on the MAX6744XKSYD3 is an open-drain active-high signal that remains low while VCC1 is below 2.925V, then transitions high after VCC1 exceeds that threshold for 37.5–75.0ms. This enables controlled power-up sequencing-for example, using POK1 to enable a VCC2 DC/DC converter only after VCC1 stabilization.
Can the MAX6744XKSYD3 monitor a negative supply voltage?
No, the MAX6744XKSYD3 is not designed to directly monitor negative voltages. Its VCC1 and VCC2 inputs require positive supply connections (1.0V to 5.5V). While the MAX6742/MAX6745 family includes PFI/PFO for negative monitoring via external resistor networks, the MAX6744XKSYD3 lacks PFI and supports only positive dual-supply supervision.
What is the supply current consumption of the MAX6744XKSYD3 under typical operating conditions?
The MAX6744XKSYD3 consumes a maximum of 6µA total supply current (ICC1 + ICC2) across –40°C to +85°C, as specified in the Electrical Characteristics table. This ultra-low quiescent current is measured with both VCC1 and VCC2 powered and reset not asserted-making it ideal for battery-critical applications like handheld instrumentation and wearables.
MAX6744XKSYD3 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:
- -
MAX6744XKSYD3 FAQ
1.How can I place an order for MAX6744XKSYD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6744XKSYD3 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 MAX6744XKSYD3 reliable?
The price and inventory of MAX6744XKSYD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6744XKSYD3 is usually 5 days.
3.What payment methods are accepted for MAX6744XKSYD3?
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4.How is shipping managed for MAX6744XKSYD3?
MAX6744XKSYD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6744XKSYD3 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 MAX6744XKSYD3?
For technical support, including MAX6744XKSYD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6744XKSYD3 requirements.
6.How does Aetrix verify that MAX6744XKSYD3 is sourced from the original manufacturer or authorized distributors?
All MAX6744XKSYD3 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 MAX6744XKSYD3 meets industry standards.
7.What is the process for return or replacement of MAX6744XKSYD3?
All MAX6744XKSYD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6744XKSYD3, 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 MAX6744XKSYD3 part is unused and in its original packaging.
Return procedure for MAX6744XKSYD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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