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Analog Devices Inc./Maxim Integrated MAX6736XKSFD3+T
- Part No.:
- MAX6736XKSFD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6736XKSFD3+T.pdf
- Description:
- IC SUPERVISOR MPU LP SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,719
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Product details
Overview
The MAX6736XKSFD3+T from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC in SC70-5 package, monitoring VCC1 (2.925V threshold) and VCC2 (2.188V threshold) with open-drain active-low RESET output, 150ms minimum reset timeout, and manual reset input (MR). It asserts reset if either supply falls below its factory-trimmed threshold and maintains reset for the full timeout after recovery. Designed for portable battery-powered systems requiring precise dual-rail power monitoring and low quiescent current.
For engineers reviewing the MAX6736XKSFD3+T datasheet, MAX6736XKSFD3+T pinout, MAX6736XKSFD3+T application, or MAX6736XKSFD3+T equivalent, this page provides verified technical context, exact pin functions, confirmed reset timing behavior, factory-trimmed voltage thresholds, and validated alternative parts for dual-supply supervisory use cases in multivoltage embedded systems.
Technical Context
The MAX6736XKSFD3+T implements two independent precision voltage comparators with factory-trimmed thresholds (VTH1 = 2.925V, VTH2 = 2.188V), each referenced to an internal bandgap and featuring 0.5% hysteresis. Its reset logic combines ORed comparator outputs with a monostable timeout circuit triggered on any threshold violation.
It uses an open-drain RESET output requiring external pullup, includes an MR input with 1.5kΩ internal pullup to VCC1 and 150ms manual reset timeout, and operates across VCC1/VCC2 supply ranges of 1.0–5.5V and 0.9–3.3V respectively, with guaranteed valid reset assertion down to VCC1 ≥ 1.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% over -40°C to +85°C - sets primary I/O rail reset point |
| VCC2 Threshold | 2.188V ±2.5% over -40°C to +85°C - sets secondary core rail reset point |
| Reset Timeout | 150ms min - ensures µP remains held in reset long enough for stable power recovery |
| Supply Current | 6µA typical at +25°C - enables multi-year battery life in portable equipment |
| Operating Temp | -40°C to +85°C - supports industrial and automotive under-hood environments |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint ideal for space-constrained PCBs |
| RESET Output | Open-drain active-low - allows wired-OR configuration and level-shifting flexibility |
Pinout & Package
Package: 5-pin SC70-5, 2.0mm × 1.25mm, 0.65mm pitch, exposed pad optional.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output; requires external pullup; asserts when VCC1 < 2.925V or VCC2 < 2.188V |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 via 1.5kΩ; forces RESET low for ≥150ms after release |
| 4 | VCC2 | Secondary supply input (core rail); monitored against 2.188V threshold |
| 5 | VCC1 | Primary supply input (I/O rail); monitored against 2.925V threshold; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneous supervision of I/O (2.925V) and core (2.188V) rails eliminates need for two discrete supervisors |
| Factory-trimmed thresholds | ±2.5% accuracy over temperature avoids external resistor calibration and reduces BOM count |
| 150ms reset timeout | Guaranteed minimum hold time ensures reliable µP initialization after brownout recovery |
| 6µA supply current | Enables >10-year battery life in always-on IoT sensors and handheld medical devices |
| SC70-5 package | Reduces board area by >60% vs. SOT23-5 while maintaining hand-solderability |
Applications
| Portable Medical Sensors | Notebook Power Management |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with separate 3.0V I/O and 2.2V MCU core rails. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting RESET during battery sag to prevent corrupted sensor data writes. Use Value: 6µA quiescent current extends battery life beyond 3 years; factory-trimmed thresholds eliminate calibration drift over shelf life. | Use Scenario: Dual-voltage CPU platform requiring controlled sequencing of 3.3V I/O and 2.2V core supplies during boot. IC Role / Device Role / Timing Role: Monitors both rails independently and holds RESET until both stabilize above thresholds for ≥150ms. Use Value: Prevents CPU lockup due to out-of-spec core voltage during power-up transients. |
| Industrial PLC I/O Modules | POS Terminal Power Supervision |
Use Scenario: DIN-rail mounted controller with 24V-to-3.3V/2.2V DC-DC conversion and ESD-prone field wiring. IC Role / Device Role / Timing Role: Detects undervoltage on both regulated rails caused by load surges or input ripple. Use Value: 0.5% hysteresis prevents chatter during marginal supply conditions; SC70 package withstands vibration. | Use Scenario: Retail point-of-sale terminal using Li-ion backup with 3.3V display interface and 2.2V secure element. IC Role / Device Role / Timing Role: Ensures secure element resets cleanly during battery switchover to avoid cryptographic key corruption. Use Value: MR input allows service-mode forced reset without power cycle; 150ms timeout guarantees secure boot integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6737XKSFD3+T | Push-pull RESET output instead of open-drain; same thresholds, timing, and pinout | Eliminates need for external pullup resistor; incompatible with wired-OR reset buses | Select when driving single-load µP directly and board layout prohibits external pullup |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); 200ms timeout; 1.6µA IQ; SOT-23-5 package | Monitors only one rail; lacks VCC2 input and MR input; no dual-threshold capability | Select only for single-rail systems where cost and ultra-low IQ outweigh dual-monitoring requirement |
Compared with MAX6736XKSFD3+T, MAX6737XKSFD3+T offers push-pull drive for simpler interfacing but sacrifices bus-sharing capability, while TPS3808G33DBVR reduces supply current by 73% but abandons dual-rail supervision entirely-making it unsuitable for systems requiring coordinated I/O/core voltage validation.
Availability
MAX6736XKSFD3+T is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, industrial PLC I/O modules, and POS terminal power supervision requiring stable component supply, long-lifecycle support, and guaranteed factory-trimmed voltage accuracy.
Supply support for MAX6736XKSFD3+T 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 connectivity in demanding industrial, automotive, and medical applications.
The MAX6736–MAX6745 family delivers ultra-low-power dual/triple-supply supervision with factory-trimmed thresholds and flexible reset architectures for battery-powered and multivoltage embedded systems.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6736XKSFD3+T?
The MAX6736XKSFD3+T has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, specified over the full -40°C to +85°C operating range with ±2.5% tolerance. These values are encoded in the "S" and "Y" suffixes per Maxim's Table 1 and are confirmed in the Electrical Characteristics section of the official datasheet.
Does the MAX6736XKSFD3+T require an external pullup resistor on the RESET pin?
Yes, the MAX6736XKSFD3+T features an open-drain RESET output and requires an external pullup resistor to VCC1 or another compatible voltage rail. The datasheet specifies typical pullup values between 10kΩ and 100kΩ depending on rise-time and bus loading requirements; absence of this resistor will prevent proper high-level assertion of RESET.
What is the function of the MR pin on the MAX6736XKSFD3+T and how is it biased?
The MR pin on the MAX6736XKSFD3+T is an active-low manual reset input with an internal 1.5kΩ pullup resistor to VCC1. When pulled to GND for ≥1µs, it forces RESET low and maintains it for 150ms after release. Leaving MR unconnected defaults it to high via the internal pullup, enabling automatic reset-only operation.
Can the MAX6736XKSFD3+T monitor voltages below 1.0V on VCC2?
No-the MAX6736XKSFD3+T monitors VCC2 within a factory-set range of 0.9V to 3.3V, and its specific VCC2 threshold is fixed at 2.188V. To monitor sub-1.0V rails, a different variant such as MAX6738/MAX6739 with RSTIN input (threshold = 0.488V) would be required; the MAX6736XKSFD3+T does not support adjustable or sub-vertex thresholds on VCC2.
What is the maximum operating voltage for VCC1 and VCC2 inputs on the MAX6736XKSFD3+T?
The MAX6736XKSFD3+T supports VCC1 input voltages from 1.0V to 5.5V (0°C to +85°C) and VCC2 from 0.9V to 3.3V. Absolute maximum ratings allow VCC1/VCC2 up to +6V transiently, but sustained operation above 5.5V on VCC1 or 3.3V on VCC2 violates specifications and may damage the device.
MAX6736XKSFD3+T 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:
- -
MAX6736XKSFD3+T FAQ
1.How can I place an order for MAX6736XKSFD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6736XKSFD3+T 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 MAX6736XKSFD3+T reliable?
The price and inventory of MAX6736XKSFD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6736XKSFD3+T is usually 5 days.
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Once your MAX6736XKSFD3+T 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 MAX6736XKSFD3+T?
For technical support, including MAX6736XKSFD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6736XKSFD3+T requirements.
6.How does Aetrix verify that MAX6736XKSFD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6736XKSFD3+T 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 MAX6736XKSFD3+T meets industry standards.
7.What is the process for return or replacement of MAX6736XKSFD3+T?
All MAX6736XKSFD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6736XKSFD3+T, 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 MAX6736XKSFD3+T part is unused and in its original packaging.
Return procedure for MAX6736XKSFD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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