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Analog Devices Inc./Maxim Integrated MAX6352TWUK
- Part No.:
- MAX6352TWUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6352TWUK.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,847
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Product details
Overview
MAX6352TWUK from Maxim Integrated is a dual-voltage microprocessor supervisory IC with open-drain active-low reset output, monitoring VCC1 at 3.08V and VCC2 at 1.67V thresholds over -40°C to +85°C. It features 20µA supply current, 100ms minimum power-on reset pulse width, and guaranteed RESET validity down to VCC1 or VCC2 ≥ 1.0V. Used in multivoltage embedded systems requiring reliable power-fail detection and manual reset assertion.
For engineers reviewing the MAX6352TWUK datasheet, MAX6352TWUK pinout, MAX6352TWUK application, or MAX6352TWUK equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), open-drain RST output compatibility with mixed-voltage logic interfaces, manual reset debouncing, and absence of watchdog or third-voltage monitor functions in this variant.
Technical Context
The MAX6352TWUK implements independent precision voltage comparators for VCC1 and VCC2, asserting reset when either supply falls below its factory-set threshold (3.08V / 1.67V). Its open-drain RST output requires an external pull-up and is referenced to VCC1, enabling level-shifting across voltage domains.
Reset assertion is guaranteed as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, and the device rejects transients ≤ 200µs at 100mV overdrive. It includes a debounced TTL/CMOS-compatible MR input with 1µs minimum pulse width and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±1.5% over -40°C to +85°C - precise brownout detection for primary 3.3V rail |
| VCC2 Threshold | 1.67V ±1.5% over -40°C to +85°C - accurate monitoring of secondary low-voltage rail (e.g., 1.8V core) |
| Supply Current | 20µA typical - enables battery-backed operation in portable equipment |
| Reset Pulse Width | 100ms minimum - ensures sufficient duration for µP initialization and peripheral stabilization |
| RST Output Type | Active-low open-drain - allows wired-OR configuration and interface to multiple voltage domains via external pull-up |
| MR Input Compatibility | TTL/CMOS-debounced - eliminates need for external RC filtering; accepts standard logic-level reset signals |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MAX6352TWUK is housed in a 5-pin SOT23-5 package with 1.6mm × 2.9mm footprint and 0.95mm height, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Asserted when VCC1 < 3.08V or VCC2 < 1.67V; requires external pull-up to define logic-high level |
| 2 - GND | Ground reference | Common return path for internal comparators and MR input; must be low-impedance |
| 3 - MR | Debounced manual reset input | Pull low to force reset; internally pulled up (32–100kΩ); compatible with 3.3V/5V logic |
| 4 - VCC2 | Secondary supply input and monitor rail | Power source and monitored voltage; must be ≥1.2V for full functionality; sets VTH2 = 1.67V |
| 5 - VCC1 | Primary supply input and monitor rail | Power source and monitored voltage; must be ≥1.2V; sets VTH1 = 3.08V and powers RST pull-down stage |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous 3.08V and 1.67V thresholds eliminate need for discrete comparators or resistor dividers |
| Open-drain RST with VCC1-referenced sink | Enables flexible reset signaling across voltage domains (e.g., 3.3V µP controlling 5V peripherals) |
| Guaranteed reset validity to 1.0V | Ensures clean reset assertion even during deep brownout conditions on either supply rail |
| 20µA ultra-low quiescent current | Extends battery life in portable instrumentation and always-on monitoring nodes |
| 100ns MR input glitch rejection | Prevents spurious resets from noise or contact bounce without external filtering components |
Applications
| Industrial PLC I/O Modules | Medical Patient Monitor Power Sequencing |
|---|---|
Use Scenario: Dual-rail power system with 3.3V logic and 1.8V FPGA core where independent brownout detection prevents partial initialization. IC Role / Device Role / Timing Role: Supervisory circuit asserting open-drain reset to both µP and FPGA upon failure of either rail, with timing coordinated to 100ms pulse width. Use Value: Eliminates risk of metastability or corrupted configuration by ensuring both domains reset synchronously under undervoltage. |
Use Scenario: Battery-powered bedside monitor with 3.3V display controller and 1.65V sensor ADC requiring fail-safe shutdown before data corruption. IC Role / Device Role / Timing Role: Voltage supervisor triggering system-wide reset when main 3.08V supply or backup 1.67V rail drops below threshold. Use Value: Prevents invalid sensor readings or display artifacts by guaranteeing reset occurs prior to analog front-end instability. |
| Automotive Body Control Unit (BCU) | Point-of-Sale Terminal Power Management |
Use Scenario: 12V-to-3.3V/1.8V DC-DC converted system in BCU where cold-cranking causes transient dips on both rails. IC Role / Device Role / Timing Role: Dual-threshold supervisor detecting simultaneous or independent rail collapse and asserting reset within 20µs delay. Use Value: Maintains functional safety integrity by preventing MCU lockup during engine start transients. |
Use Scenario: Retail terminal with 5V USB host and 1.8V secure element where loss of either rail compromises transaction security. IC Role / Device Role / Timing Role: Reset generator monitoring 3.08V system rail and 1.67V crypto module rail, asserting shared open-drain reset line. Use Value: Enforces atomic power-fail response across security-critical subsystems to prevent credential leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6352TVUK | VCC1 threshold = 3.08V, VCC2 threshold = 1.58V (vs. 1.67V); otherwise identical pinout, package, and function | Suitable where tighter 1.58V margin required for 1.8V rail tolerance; same reset timing and current draw | Select MAX6352TVUK if system requires lower VCC2 trip point while retaining identical layout and firmware integration |
| TPS3808G33DBVR | Single-supply (3.3V only), push-pull RST, no VCC2 monitor; 35µA ICC vs. 20µA; 200ms reset timeout | Lacks dual-rail capability; requires separate supervision for second rail; higher supply current reduces battery life | Choose only if design uses single 3.3V rail and prioritizes TI's long-term availability over dual-monitoring capability |
Compared with MAX6352TVUK, MAX6352TWUK provides a 90mV higher VCC2 threshold ideal for 1.8V rails with ±5% tolerance, while TPS3808G33DBVR offers no dual-voltage support-making MAX6352TWUK uniquely suited for compact multivoltage systems needing precise, low-power, open-drain reset coordination.
Availability
MAX6352TWUK is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6352TWUK 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 industrial, communications, and computing applications, emphasizing high reliability and low power.
The MAX6351–MAX6360 family delivers dual- and triple-voltage supervision for multirail embedded systems, targeting applications where independent rail monitoring and deterministic reset timing are critical to system robustness.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6352TWUK?
The MAX6352TWUK has a factory-set VCC1 threshold of 3.08V and VCC2 threshold of 1.67V, each with ±1.5% tolerance over the full -40°C to +85°C operating range. These values are laser-trimmed during production and documented in Maxim's Electrical Characteristics table for MAX6352TWUK under "VCC1 Threshold" and "VCC2 Threshold" entries.
Does the MAX6352TWUK include a watchdog timer or third-voltage monitor?
No, the MAX6352TWUK does not include a watchdog timer or third-voltage monitor. Per Maxim's Selector Guide and Pin Description, MAX6352 variants are designated as open-drain reset supervisors with dual-voltage monitoring only-functions like WDI and RSTIN are exclusive to MAX6358–MAX6360 and MAX6355–MAX6357 families respectively.
What is the recommended pull-up resistor value for the open-drain RST output of MAX6352TWUK?
For the MAX6352TWUK's open-drain RST output, a 10kΩ to 100kΩ pull-up resistor is recommended depending on rise time and bus capacitance. With 10pF load and 100kΩ pull-up, rise time is ~400ns (per Typical Operating Characteristics Figure MAX6351/60-07); lower resistance improves speed but increases static current.
Can the MAX6352TWUK operate with VCC1 = 2.5V and VCC2 = 1.5V?
No-the MAX6352TWUK requires VCC1 ≥ 1.2V and VCC2 ≥ 1.2V for guaranteed operation per Absolute Maximum Ratings and Electrical Characteristics. At VCC2 = 1.5V, it remains above the 1.67V threshold and will assert reset; operation below 1.2V violates specification and may cause undefined behavior in the MAX6352TWUK.
Is the manual reset (MR) input of MAX6352TWUK internally pulled up, and what is its resistance range?
Yes, the MR input of MAX6352TWUK is internally pulled up with a resistance ranging from 32kΩ to 100kΩ (typical 63.5kΩ), as specified in the Electrical Characteristics table under "MR Pullup Resistance." This eliminates the need for an external pull-up resistor in most designs.
MAX6352TWUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 3.08V
- 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
MAX6352TWUK FAQ
1.How can I place an order for MAX6352TWUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6352TWUK 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 MAX6352TWUK reliable?
The price and inventory of MAX6352TWUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6352TWUK is usually 5 days.
3.What payment methods are accepted for MAX6352TWUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6352TWUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6352TWUK?
MAX6352TWUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6352TWUK 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 MAX6352TWUK?
For technical support, including MAX6352TWUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6352TWUK requirements.
6.How does Aetrix verify that MAX6352TWUK is sourced from the original manufacturer or authorized distributors?
All MAX6352TWUK 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 MAX6352TWUK meets industry standards.
7.What is the process for return or replacement of MAX6352TWUK?
All MAX6352TWUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX6352TWUK, 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 MAX6352TWUK part is unused and in its original packaging.
Return procedure for MAX6352TWUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6352TWUK Tags
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APX803L20-29SA-7
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