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Analog Devices Inc./Maxim Integrated MAX6739XKVD3
- Part No.:
- MAX6739XKVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6739XKVD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,633
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Product details
Overview
The MAX6739XKVD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with one factory-trimmed reset threshold (VTH1 = 2.925V) and one adjustable reset input (RSTIN, 488mV reference), push-pull active-low RESET output, manual reset input (MR), and SC70-5 package. It monitors VCC1 (I/O supply) and VCC2 (core supply) in portable systems, asserting reset if either falls below its threshold and maintaining it for ≥150ms after recovery. Designed for battery-powered equipment requiring precise dual-rail supervision.
For engineers reviewing the MAX6739XKVD3 datasheet, MAX6739XKVD3 pinout, MAX6739XKVD3 application, or MAX6739XKVD3 equivalent, key selection criteria include its 2.925V/adjustable dual-threshold architecture, 6µA quiescent current, 150ms reset timeout, push-pull RESET drive capability, and SC70-5 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6739XKVD3 implements a dual-supply monitoring architecture with independent comparators for VCC1 (factory-set at 2.925V) and VCC2 (user-adjustable via RSTIN with 488mV internal reference). Its push-pull RESET output eliminates external pull-up requirements and supports direct interface to µP reset pins without contention risk.
It integrates a dedicated MR input with 1.5kΩ internal pull-up to VCC1, 150ms manual reset timeout, and glitch rejection (100ns). The device operates across -40°C to +85°C with supply voltage ranges of 1.0–5.5V (VCC1) and 0.9–3.3V (VCC2), ensuring robustness in multivoltage portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% (factory-trimmed; enables reliable I/O rail supervision at 3.0V nominal systems) |
| RSTIN Threshold | 488mV ±1.5% (internal reference; allows monitoring of core supplies down to 0.788V via resistor divider) |
| Reset Timeout | 150ms minimum (D3 suffix; ensures µP reset hold time meets ARM Cortex-M and similar MCU requirements) |
| Supply Current | 6µA typical (ICC1 + ICC2 at VCC1=1.8V/VCC2=1.2V; extends battery life in always-on IoT sensors) |
| Operating Temp | -40°C to +85°C (industrial-grade range; supports deployment in automotive infotainment and industrial handhelds) |
| Package | SC70-5 (1.6mm × 1.6mm footprint; enables high-density PCB layouts in wearables and medical patches) |
| RESET Output | Push-pull, active-low (drives high/low directly; eliminates need for external pull-up and simplifies µP interface) |
Pinout & Package
MAX6739XKVD3 uses a 5-pin SC70-5 package with exposed pad (not electrically connected). Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is MR (active-low manual reset), Pin 4 is VCC2 (core supply input), and Pin 5 is VCC1 (I/O supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Asserts low when VCC1 < 2.925V or RSTIN < 488mV; deasserts only after both recover for ≥150ms; drives µP reset pin directly |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and output stage; must be low-impedance connection to system ground plane |
| 3 - MR | Active-low manual reset input | Pull low ≥1µs to force RESET low; internal 1.5kΩ pull-up to VCC1 enables switch-to-ground implementation without external components |
| 4 - VCC2 | Core supply voltage input | Monitors secondary rail (0.9–3.3V); connects to processor core domain; threshold set by external RSTIN divider |
| 5 - VCC1 | I/O supply voltage input | Primary monitored rail (1.0–5.5V); powers internal circuitry and defines RESET high-level voltage (VOH ≈ 0.8×VCC1) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (2.925V fixed) and VCC2 (adjustable via RSTIN) prevents premature reset during asymmetric rail sequencing |
| Push-pull RESET output | Eliminates external pull-up resistor requirement and avoids logic contention with bidirectional µP reset pins |
| Ultra-low 6µA supply current | Enables >10-year battery life in coin-cell-powered devices such as Bluetooth LE sensors and smart tags |
| 150ms reset timeout (D3) | Meets JEDEC JESD76B minimum reset assertion time for 32-bit microcontrollers and SoCs |
| MR input with integrated pull-up | Reduces BOM count by one resistor; supports momentary switch-to-ground for field service or test-mode entry |
Applications
| Portable Medical Sensors | Industrial Handheld Terminals |
|---|---|
Use Scenario: Continuous glucose monitor with dual-rail MCU (3.3V I/O, 1.2V core) powered by CR2032 battery. IC Role / Device Role / Timing Role: Supervises VCC1 (3.3V) and VCC2 (1.2V) to prevent firmware corruption during brownout; asserts RESET within 35µs of VCC1 drop below 2.925V. Use Value: 6µA quiescent current extends battery life to 3+ years; push-pull RESET ensures clean reset edge without pull-up leakage. |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-A53 (1.0V core, 3.3V I/O) operating in warehouse environments (-20°C to +60°C). IC Role / Device Role / Timing Role: Monitors both rails independently; triggers reset if core voltage sags during motor actuation while I/O remains stable. Use Value: -40°C to +85°C rating guarantees operation in cold storage zones; 150ms timeout satisfies bootloader timing requirements. |
| Wearable Fitness Trackers | Smart Home Edge Controllers |
Use Scenario: Optical heart-rate sensor with ultra-low-power MCU (1.8V I/O, 0.9V core) and BLE radio. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 0.9V core rail via resistor divider; asserts RESET before core undervoltage causes SRAM bit flips. Use Value: Adjustable 488mV reference enables accurate sub-1V supervision; SC70-5 footprint fits 8mm × 8mm PCB area budget. |
Use Scenario: Zigbee coordinator with dual DC-DC converters (3.3V I/O, 1.1V core) managing multiple end devices. IC Role / Device Role / Timing Role: Ensures proper power-up sequence: VCC1 (I/O) must stabilize before VCC2 (core) is enabled via external enable signal. Use Value: Independent VCC1/VCC2 monitoring prevents lockup during converter startup transients; MR pin enables factory calibration mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6738XKVD3 | Open-drain RESET output (vs. push-pull); identical thresholds, timeout, and pinout | Requires external pull-up resistor; suitable where level-shifting or wired-OR reset bus is needed | Select MAX6738XKVD3 only if system requires open-drain reset for multi-master arbitration or voltage translation |
| TPS3808G15DBVR | Single-supply supervisor (1.5V fixed threshold); 1.8–6.0V VDD range; 350ms timeout; SOT-23-6 package | Lacks dual-rail monitoring and adjustable threshold; no MR input; higher 12µA supply current | Choose TPS3808G15DBVR only for single-rail applications where cost-per-function is prioritized over feature density |
Compared with MAX6738XKVD3, the MAX6739XKVD3 saves one external component and improves noise immunity; versus TPS3808G15DBVR, it delivers true dual-rail supervision with lower quiescent current and smaller footprint-critical for compact, battery-sensitive designs.
Availability
MAX6739XKVD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, wearable fitness trackers, and smart home edge controllers requiring stable component supply and long-term production continuity.
Supply support for MAX6739XKVD3 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 precision analog, mixed-signal, and high-reliability ICs for industrial, automotive, and computing markets.
The MAX6736–MAX6745 family was designed specifically for low-power dual- and triple-voltage microprocessor supervision in space- and energy-constrained portable electronics, emphasizing ultra-low ICC, small SC70 packaging, and flexible threshold configuration.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6739XKVD3?
The MAX6739XKVD3 has a factory-trimmed VCC1 reset threshold of 2.925V (±2.5%) over the full -40°C to +85°C temperature range. This value is confirmed in Table 1 of the datasheet under suffix "SV", and applies specifically to the MAX6739XKVD3 part number-not other variants in the MAX6736–MAX6745 family.
Does the MAX6739XKVD3 support monitoring a 0.9V core supply?
Yes, the MAX6739XKVD3 supports monitoring a 0.9V core supply using its RSTIN pin with the internal 488mV reference. By configuring an external resistor divider (e.g., R1=1.0MΩ, R2=560kΩ), the effective trip point becomes 0.9V. The device's VCC2 specification (0.9V–3.3V) and RSTIN electrical characteristics (0.468V–0.507V threshold) confirm this capability for the MAX6739XKVD3.
What is the function of the MR pin on the MAX6739XKVD3?
The MR pin on the MAX6739XKVD3 is an active-low manual reset input with an internal 1.5kΩ pull-up to VCC1. Pulling MR low for ≥1µs forces the RESET output low for ≥150ms after MR returns high. This enables hardware-initiated resets via pushbutton switches or test-system control signals-fully supported and characterized for the MAX6739XKVD3 in the Electrical Characteristics table.
Is the RESET output of the MAX6739XKVD3 push-pull or open-drain?
The RESET output of the MAX6739XKVD3 is push-pull active-low, as confirmed in the Selector Guide (page 14) and Pin Description (page 8). Unlike the MAX6738XKVD3 (open-drain), the MAX6739XKVD3 drives both high and low states internally-eliminating the need for an external pull-up resistor and enabling direct connection to most µP reset inputs.
What package type and dimensions does the MAX6739XKVD3 use?
The MAX6739XKVD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.95mm (max height), with pin pitch of 0.65mm. This is explicitly stated in the Ordering Information section (page 2) and verified in the Pin Configurations diagram (page 15) for MAX6739. The exposed pad is non-functional and may be left unconnected or grounded for thermal relief.
MAX6739XKVD3 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:
- 1.575V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6739XKVD3 FAQ
1.How can I place an order for MAX6739XKVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6739XKVD3 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 MAX6739XKVD3 reliable?
The price and inventory of MAX6739XKVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6739XKVD3 is usually 5 days.
3.What payment methods are accepted for MAX6739XKVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6739XKVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6739XKVD3?
MAX6739XKVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6739XKVD3 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 MAX6739XKVD3?
For technical support, including MAX6739XKVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6739XKVD3 requirements.
6.How does Aetrix verify that MAX6739XKVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6739XKVD3 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 MAX6739XKVD3 meets industry standards.
7.What is the process for return or replacement of MAX6739XKVD3?
All MAX6739XKVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6739XKVD3, 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 MAX6739XKVD3 part is unused and in its original packaging.
Return procedure for MAX6739XKVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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