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Analog Devices Inc./Maxim Integrated MAX6452UT44L+T
- Part No.:
- MAX6452UT44L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6452UT44L+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,269
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Product details
Overview
The MAX6452UT44L+T from Maxim Integrated is a dual-supply microprocessor reset supervisor IC with one fixed-threshold (4.375V) and one adjustable-threshold (0.63V reference) voltage monitor, extended manual reset setup period (6.72s), push-pull active-low RESET output, and 6-pin SOT23 package. It ensures reliable system initialization in brownout, power-up, and front-panel reset scenarios for consumer and industrial embedded systems.
For engineers reviewing the MAX6452UT44L+T datasheet, MAX6452UT44L+T pinout, MAX6452UT44L+T application, or MAX6452UT44L+T equivalent, key selection considerations include its dual-monitor architecture (VCC + RSTIN), long MR1 setup time (6.72s), immediate MR2 edge-triggered reset, guaranteed RESET validity down to VCC = 1.0V, and automotive-grade temperature range (-40°C to +85°C).
Technical Context
The MAX6452UT44L+T integrates two independent reset comparators: one monitors VCC against a factory-set 4.375V threshold (±1.5% over temperature), while the other monitors an external voltage via RSTIN using a precision 0.630V internal reference with 2.5mV hysteresis. Its dual manual reset inputs operate asymmetrically-MR1 requires a 6.72s low assertion (L-suffix), while MR2 responds immediately to a rising edge.
RESET is an active-low push-pull output with 0.3V max VOL at 100µA sink, deasserted at ≥0.8×VCC, and guaranteed functional down to VCC = 1.0V. The device features 210ms typical reset timeout after supply recovery and 140ms minimum timeout after valid manual reset assertion, with immunity to transients ≤20µs when VCC dips 100mV below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.375V ±1.5% - precisely holds system reset until main supply stabilizes above nominal 4.375V rail |
| RSTIN Reference Voltage | 0.630V ±0.020V - enables accurate monitoring of auxiliary supplies (e.g., 1.2V, 1.8V, 3.3V) via external resistor divider |
| Manual Reset Setup (MR1) | 6.72s typ - prevents nuisance resets from brief front-panel button presses; requires sustained press for hard reset |
| MR2 Response | Rising-edge triggered - asserts RESET immediately on MR2 high transition, ideal for smart-card detect or test-mode entry |
| Reset Timeout Period | 140ms min / 210ms typ - ensures µP completes full reset sequence before release, meeting most processor requirements |
| Supply Current | 6µA typ at 3.6V - minimizes standby power in battery-backed or energy-sensitive applications |
| Operating Temperature | -40°C to +85°C - supports industrial and automotive cabin-temperature environments without derating |
Pinout & Package
Package: 6-pin SOT23 (U6+1, outline 21-0058), footprint land pattern 90-0175, RoHS-compliant lead(Pb)-free (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system ground plane |
| 2 VCC | Main supply input | Powers internal comparators and logic; monitored for 4.375V reset condition; operates from 1.0V to 5.5V |
| 3 MR1 | Extended manual reset input | Active-low input with 50kΩ internal pullup; requires 6.72s low assertion to trigger one-shot RESET pulse |
| 4 MR2 | Immediate manual reset input | Active-high edge-triggered input; rising edge pulses RESET for 140ms min; debounced 210ms on falling edge |
| 5 RSTIN | Adjustable threshold monitor input | High-impedance (±25nA) input referenced to 0.630V; connects to external resistor divider for custom voltage monitoring |
| 6 RESET | Active-low push-pull output | Drives µP reset pin directly; sinks 100µA @ 0.3V max; valid logic state guaranteed down to VCC = 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises primary VCC (4.375V) and secondary supply (via RSTIN), enabling robust multi-rail system reset coordination |
| Asymmetric manual reset architecture | MR1 (6.72s hold) prevents accidental resets; MR2 (edge-triggered) enables fast test-mode or card-detect functions without layout changes |
| Guaranteed RESET operation down to VCC = 1.0V | Ensures deterministic reset behavior during deep brownout or battery-depletion scenarios where many supervisors fail |
| Low 6µA quiescent current | Reduces system standby power by >50% vs. legacy supervisors, critical for always-on consumer devices |
| Transient immunity (≤20µs @ 100mV dip) | Rejects EMI-induced supply glitches without requiring external filtering, simplifying PCB design and BOM |
Applications
| Set-Top Box Power Management | DVD Player System Recovery |
|---|---|
Use Scenario: Front-panel power button initiates soft interrupt if pressed briefly (<6.72s), but triggers full hardware reset if held longer. IC Role / Device Role / Timing Role: MAX6452UT44L+T acts as dual-role reset controller-MR1 provides timed hard reset, MR2 enables instant firmware update mode entry. Use Value: Eliminates need for separate interrupt and reset buttons; reduces mechanical switch count and front-panel complexity. | Use Scenario: DVD player experiences brownout during disc spin-up, causing partial firmware hang. IC Role / Device Role / Timing Role: MAX6452UT44L+T monitors both 3.3V logic rail (VCC) and 1.2V core supply (RSTIN via divider), asserting RESET only when both recover. Use Value: Prevents spurious resets during transient core-voltage dips, improving playback reliability and user experience. |
| Industrial Modem Fault Recovery | Medical Device Power Sequencing |
Use Scenario: Cable/DSL modem loses upstream sync; technician presses service button to force reinitialization. IC Role / Device Role / Timing Role: MR2 rising edge triggers immediate 140ms RESET pulse, while MR1 6.72s hold initiates full factory reset sequence. Use Value: Enables two-tiered recovery: quick restart (MR2) for transient faults, deep reset (MR1) for persistent lockups-no firmware intervention needed. | Use Scenario: Portable ultrasound device powers up from battery; multiple rails (5V, 3.3V, 1.8V) must stabilize in strict order. IC Role / Device Role / Timing Role: MAX6452UT44L+T monitors main 3.3V rail (VCC) and critical 1.8V analog supply (RSTIN), holding RESET until both exceed thresholds. Use Value: Guarantees safe power sequencing without external timing components, reducing risk of analog front-end damage during startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6451UT44L+T | Same pinout and electrical specs, but open-drain RESET output instead of push-pull | Requires external pullup resistor; better suited for level-shifting or wired-OR reset bus configurations | Select when interfacing to mixed-voltage systems or sharing RESET line with other open-drain sources |
| TPS3808G33DBVR | Single 3.3V fixed threshold, no RSTIN input, 200ms reset timeout, 1.6µA ICC | Lacks dual-monitor capability and MR2 immediate reset; simpler for single-rail designs | Choose for cost-sensitive, single-supply applications where adjustable monitoring and dual reset inputs are unnecessary |
Compared with MAX6451UT44L+T, the MAX6452UT44L+T offers direct drive capability without external components; versus TPS3808G33DBVR, it delivers greater flexibility in multi-rail supervision and user-initiated recovery modes, justifying its use in complex consumer and industrial systems.
Availability
MAX6452UT44L+T is available at Aetrix Electronics and suitable for set-top boxes, DVD players, and industrial modems requiring stable component supply, long-term lifecycle support, and guaranteed automotive-grade temperature performance.
Supply support for MAX6452UT44L+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 industrial, communications, and consumer applications.
The MAX6443–MAX6452 family was engineered specifically for robust microprocessor supervision in noise-prone consumer electronics and industrial equipment, emphasizing long manual reset setup, dual-supply monitoring, and ultra-low power consumption.
FAQ
What is the exact reset threshold voltage for MAX6452UT44L+T?
The MAX6452UT44L+T has a factory-set VCC reset threshold of 4.375V (suffix "44"), with ±1.5% tolerance over -40°C to +85°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under VTH for "44" variant. The RSTIN input uses a separate 0.630V internal reference for adjustable monitoring.
Does MAX6452UT44L+T support both push-pull and open-drain RESET outputs?
No, MAX6452UT44L+T features a push-pull RESET output only. The "T" suffix in the ordering code indicates tape-and-reel packaging, not output type. Output configuration is determined by part number family: MAX6452 variants with "T" ending (e.g., MAX6452UT44L+T) are push-pull; MAX6451 variants (e.g., MAX6451UT44L+T) provide open-drain. This is confirmed in the Pin Configurations table on page 11 of the datasheet.
How does the MR2 input function on MAX6452UT44L+T?
On MAX6452UT44L+T, MR2 is an immediate-response, rising-edge-triggered input. A low-to-high transition on MR2 asserts the RESET output for the full 140ms minimum timeout period. If another rising edge occurs before timeout expires, the timer resets and restarts. MR2 is internally debounced for 210ms on the falling edge to prevent false triggers during switch release-making it ideal for smart-card detect or test-mode activation.
Can MAX6452UT44L+T monitor a 1.8V supply?
Yes, MAX6452UT44L+T can monitor a 1.8V supply using its RSTIN pin. With the internal 0.630V reference, connect RSTIN to the center node of a resistor divider (e.g., R1 = 460kΩ, R2 = 250kΩ) to set VMON-TH = 0.63 × (R1+R2)/R2 ≈ 1.8V. The RSTIN input draws only ±25nA, enabling high-value resistors that minimize current draw while maintaining accuracy.
What is the minimum VCC required for MAX6452UT44L+T to guarantee valid RESET output?
MAX6452UT44L+T guarantees valid RESET logic state (VOL ≤ 0.3V, VOH ≥ 0.8×VCC) down to VCC = 1.0V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Below 1.0V, RESET may become indeterminate. For applications requiring valid reset down to 0V, a 100kΩ pulldown resistor to GND is recommended-but only for push-pull versions like MAX6452UT44L+T, not open-drain variants.
MAX6452UT44L+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.375V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6452UT44L+T FAQ
1.How can I place an order for MAX6452UT44L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6452UT44L+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 MAX6452UT44L+T reliable?
The price and inventory of MAX6452UT44L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6452UT44L+T is usually 5 days.
3.What payment methods are accepted for MAX6452UT44L+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6452UT44L+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6452UT44L+T?
MAX6452UT44L+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6452UT44L+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 MAX6452UT44L+T?
For technical support, including MAX6452UT44L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6452UT44L+T requirements.
6.How does Aetrix verify that MAX6452UT44L+T is sourced from the original manufacturer or authorized distributors?
All MAX6452UT44L+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 MAX6452UT44L+T meets industry standards.
7.What is the process for return or replacement of MAX6452UT44L+T?
All MAX6452UT44L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6452UT44L+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 MAX6452UT44L+T part is unused and in its original packaging.
Return procedure for MAX6452UT44L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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