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Analog Devices Inc./Maxim Integrated MAX6352LTUK+
- Part No.:
- MAX6352LTUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6352LTUK+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
MAX6352LTUK+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, featuring active-low open-drain reset output referenced to VCC1, precision factory-set thresholds of 4.63V (VCC1) and 3.08V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used for reliable power-on reset and supply monitoring in multivoltage embedded systems.
For engineers reviewing the MAX6352LTUK+ datasheet, MAX6352LTUK+ pinout, MAX6352LTUK+ application, or MAX6352LTUK+ equivalent, key selection criteria include dual-supply threshold accuracy, open-drain reset compatibility with legacy µP reset inputs, manual-reset debouncing, and operation across –40°C to +85°C industrial temperature range.
Technical Context
The MAX6352LTUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its open-drain RST output low if either falls below its respective factory-trimmed threshold (4.63V/3.08V). Reset remains valid as long as at least one supply exceeds +1.0V, enabling robust brownout detection during asymmetric rail collapse.
No watchdog timer or third-voltage monitor is present - this variant belongs to the base dual-supply group (MAX6352), distinct from MAX6358–MAX6360 (watchdog-enabled) and MAX6355–MAX6357 (RSTIN-equipped). Its manual-reset input (MR) is TTL/CMOS-compatible and debounced internally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V (25°C), 4.50V to 4.75V (–40°C to +85°C) - sets precise power-fail detection point for primary supply |
| VCC2 Threshold | 3.08V ±0.05V (25°C), 3.00V to 3.15V (–40°C to +85°C) - enables accurate monitoring of secondary 3.3V or 3.0V rail |
| Reset Timeout Period | 100ms to 280ms - ensures minimum reset pulse width sufficient for full µP initialization |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V) - supports ultra-low-power battery-backed or always-on supervision |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| Reset Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting with external pull-up |
| Reset Validity Range | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - guarantees functional reset assertion even during deep brownout |
Pinout & Package
MAX6352LTUK+ is housed in a RoHS-compliant 5-pin SOT23 package (U5-1 outline, land pattern 90-0174), with 1.3mm × 2.2mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable and multilayer designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Drives low when VCC1 < 4.63V or VCC2 < 3.08V; requires external pull-up for logic-high state |
| 2 - GND | Ground reference | Common return path for both supplies and internal comparators; must be low-impedance |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internal 32–100kΩ pullup; glitch rejection >100ns |
| 4 - VCC2 | Secondary supply input & monitor | Power source and voltage-monitoring rail; threshold = 3.08V; must be ≤ VCC1 |
| 5 - VCC1 | Primary supply input & monitor | Power source and voltage-monitoring rail; threshold = 4.63V; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously tracks VCC1 (4.63V) and VCC2 (3.08V) with no external components - eliminates discrete resistor-divider networks |
| Open-drain reset output | Enables flexible interface with µPs requiring active-low reset with external pull-up (e.g., ARM Cortex-M, PIC, MSP430) |
| Guaranteed reset validity to 1.0V | Ensures deterministic reset behavior during slow power-down sequences where supplies decay below 2.0V |
| 20µA ultra-low quiescent current | Minimizes system standby power - critical for battery-powered controllers and IoT edge nodes |
| 100ms minimum POR pulse width | Meets or exceeds reset timing requirements of most 8-/16-/32-bit microcontrollers without external RC delay |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervising dual-rail power (5V analog + 3.3V digital) in programmable logic controller I/O modules subject to EMI-induced supply transients. IC Role / Device Role / Timing Role: Dual-threshold voltage supervisor asserting open-drain reset to ARM-based controller on any rail undervoltage event. Use Value: Prevents firmware corruption during field-deployed brownouts by guaranteeing reset assertion until both rails stabilize above 4.63V/3.08V. | Use Scenario: Power sequencing and fault detection in portable ultrasound probe electronics with battery-backed 3.3V and 5V rails. IC Role / Device Role / Timing Role: Primary reset generator ensuring safe boot after battery insertion or charger connection. Use Value: 20µA supply current extends battery life; 100ms reset pulse ensures complete DSP core initialization before ADC sampling begins. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Monitoring engine-control-related 5V sensor supply and 3.3V MCU supply in under-hood ECUs exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Industrial-temperature-grade dual-supply supervisor interfacing via open-drain to Infineon AURIX™ reset pin. Use Value: –40°C to +85°C operation and 20ppm/°C tempco ensure stable thresholds across automotive ambient extremes. | Use Scenario: Ensuring reliable startup and brownout recovery in DIN-rail mounted electricity meters with isolated 5V and 3.3V DC-DC outputs. IC Role / Device Role / Timing Role: Fault-tolerant reset source that remains active while either rail stays ≥1.0V - critical for nonvolatile memory write protection. Use Value: Open-drain output allows direct connection to meter SoC's bidirectional reset I/O through 4.7kΩ series resistor per Maxim application note. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6352MTUK+ | VCC1 threshold = 4.38V (vs. 4.63V); identical pinout, package, and functionality | Suitable where primary supply is 4.5V nominal instead of 5V - e.g., LDO-regulated systems with tighter tolerance | Select when system VCC1 nominal is 4.5V and 4.38V trip provides optimal margin against ripple |
| TPS3808G33DBVR | Single-supply (3.3V only), push-pull reset, 35µA ICC - no VCC2 monitoring or open-drain option | Limited to single-rail systems; lacks dual-threshold capability and open-drain flexibility | Use only if monitoring only one rail and push-pull output suffices; not a functional replacement for dual-rail supervision |
Compared with MAX6352MTUK+, the MAX6352LTUK+ offers higher VCC1 threshold (4.63V vs. 4.38V) for tighter 5V rail supervision; compared with TPS3808G33DBVR, it provides true dual-rail monitoring and open-drain output essential for legacy µP interfaces - neither alternative matches the exact dual-threshold + open-drain combination of MAX6352LTUK+.
Availability
MAX6352LTUK+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6352LTUK+ 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 high-performance analog and mixed-signal ICs for industrial, communications, and computing applications - emphasizing precision, reliability, and integration.
The MAX6351–MAX6360 family delivers dual- and triple-voltage µP supervisors optimized for multirail embedded systems where independent supply monitoring, low power, and guaranteed reset validity are critical design requirements.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6352LTUK+?
The MAX6352LTUK+ has a factory-trimmed VCC1 threshold of 4.63V (±0.09V at +25°C, 4.50V–4.75V over –40°C to +85°C) and a VCC2 threshold of 3.08V (±0.05V at +25°C, 3.00V–3.15V over temperature). These values are fixed by the "LT" suffix per Maxim's Voltage Threshold Levels table and are laser-trimmed during production for high accuracy.
Does the MAX6352LTUK+ include a watchdog timer function?
No, the MAX6352LTUK+ does not include a watchdog timer. It belongs to the base dual-supply supervisory group (MAX6352), whereas watchdog capability is exclusive to MAX6358/MAX6359/MAX6360 variants. The MAX6352LTUK+ provides only voltage monitoring, manual reset, and open-drain reset output - confirmed by its pinout (no WDI pin) and product family documentation.
Can the MAX6352LTUK+ operate with VCC1 and VCC2 supplied from different sources?
Yes, the MAX6352LTUK+ is explicitly designed for independent dual-supply monitoring: VCC1 and VCC2 may originate from separate regulators or power domains. The device asserts reset if either supply drops below its respective threshold, and reset remains valid as long as at least one supply exceeds +1.0V - enabling robust supervision in systems with asynchronous rail sequencing or failure modes.
What is the maximum allowable voltage on the MR pin of the MAX6352LTUK+?
The MR pin voltage must not exceed VCC1. For the MAX6352LTUK+, with VCC1 rated up to +5.5V, MR must remain ≤ VCC1. Absolute maximum rating is –0.3V to (VCC1 + 0.3V), but operational specification limits VMR to ≤ VCC1 to prevent damage to the internal comparator input stage - per Maxim's Electrical Characteristics table and Pin Description section.
Is the MAX6352LTUK+ pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6352LTUK+ uses the 5-pin SOT23 package shared with MAX6353 and MAX6354, but pin functions differ: MAX6353/MAX6354 feature push-pull RST outputs referenced to VCC1/VCC2 respectively, while MAX6352LTUK+ uses open-drain RST. Thus, it is not pin-compatible for direct substitution without circuit review - especially regarding reset output drive strength and external pull-up requirements.
MAX6352LTUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.08V, 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6352LTUK+ FAQ
1.How can I place an order for MAX6352LTUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6352LTUK+ 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 MAX6352LTUK+ reliable?
The price and inventory of MAX6352LTUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6352LTUK+ is usually 5 days.
3.What payment methods are accepted for MAX6352LTUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6352LTUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6352LTUK+?
MAX6352LTUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6352LTUK+ 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 MAX6352LTUK+?
For technical support, including MAX6352LTUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6352LTUK+ requirements.
6.How does Aetrix verify that MAX6352LTUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6352LTUK+ 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 MAX6352LTUK+ meets industry standards.
7.What is the process for return or replacement of MAX6352LTUK+?
All MAX6352LTUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6352LTUK+, 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 MAX6352LTUK+ part is unused and in its original packaging.
Return procedure for MAX6352LTUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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