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Analog Devices Inc./Maxim Integrated MAX6453UT31S+T
- Part No.:
- MAX6453UT31S+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6453UT31S+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,174
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Product details
Overview
MAX6453UT31S+T from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC with separate active-low push-pull VCC reset and manual reset outputs. It monitors primary supply (VCC) at 3.075V threshold and secondary supply via adjustable RSTIN input down to 0.63V, delivers 140ms min reset timeout, consumes only 6µA typical supply current, and operates across –40°C to +85°C - used in set-top boxes and DVD players for reliable power-on sequencing and brownout protection.
For engineers reviewing the MAX6453UT31S+T datasheet, MAX6453UT31S+T pinout, MAX6453UT31S+T application, or MAX6453UT31S+T equivalent, this page provides verified circuit role, factory-set 3.075V VCC threshold, 3.36s manual reset extended setup period, SOT23-6 package mapping, and confirmed alternatives for soft/hard reset coordination in consumer electronics designs.
Technical Context
The MAX6453UT31S+T implements independent monitoring paths: VCC is compared against a precision 3.075V factory-set threshold, while RSTIN accepts an externally scaled voltage via resistor divider referenced to 0.63V internal comparator threshold. Its MR input controls only MROUT - not RESET - enabling nonmaskable interrupt (NMI) generation without triggering full system reboot.
Reset assertion occurs when either VCC < 3.075V or RSTIN < 0.63V; both outputs remain asserted for ≥140ms after all monitored voltages recover. The device guarantees valid RESET output down to VCC = 1.0V and features 60ppm/°C reset threshold tempco and 2.5mV RSTIN hysteresis for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.075V ±0.075V - precisely set for 3.3V rail supervision with 2.5% tolerance |
| RSTIN Threshold | 0.630V ±0.015V - enables monitoring of secondary rails as low as 0.63V using external divider |
| Reset Timeout Period | 140ms minimum - ensures µP reset pulse meets minimum assertion time for reliable initialization |
| Supply Current | 6µA typical at 3.6V - supports ultra-low-power battery-backed or always-on systems |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset behavior even during deep brownout conditions |
| MR Setup Period | 3.36s typical - defines extended hold time required to trigger MROUT-only response |
| Output Type | Active-low push-pull - eliminates need for external pull-up; drives directly into µP reset pin |
Pinout & Package
Package: SOT23-6, surface-mount, lead(Pb)-free (indicated by "+T" suffix), -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserts when VCC < 3.075V or RSTIN < 0.63V; guaranteed valid down to VCC = 1.0V |
| 2 | GND | Ground reference for all internal comparators and outputs |
| 3 | MROUT | Active-low push-pull manual reset output; asserts immediately on MR low; remains low 140ms after MR high |
| 4 | VCC | Main power supply input and primary voltage monitor rail (3.075V threshold) |
| 5 | RSTIN | High-impedance adjustable reset input; referenced to 0.63V internal threshold for secondary rail monitoring |
| 6 | MR | Manual reset input with internal 50kΩ pull-up to VCC; controls MROUT only (no effect on RESET) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset paths | VCC and RSTIN monitored separately - enables simultaneous supervision of core and I/O rails without shared threshold constraints |
| Factory-trimmed VCC threshold | 3.075V ±0.075V - eliminates external resistor calibration and improves production yield |
| Adjustable secondary monitoring | RSTIN accepts 0.63V-referenced divider - supports custom thresholds from 0.63V up to >5V with high-impedance input (<25nA leakage) |
| Extended MR setup period | 3.36s typical - allows single pushbutton to generate NMI (short press) or hard reset (long press) without additional logic |
| Low supply current | 6µA typical at 3.6V - reduces standby power in always-on consumer devices like cable modems and MP3 players |
Applications
| Set-Top Boxes | DVD Players |
|---|---|
Use Scenario: Power-up sequencing and brownout recovery during HDMI hot-plug or tuner voltage fluctuations. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RESET on main 3.3V rail and MROUT on 1.2V core rail via RSTIN divider. Use Value: Prevents firmware corruption by ensuring µP reset occurs before peripheral initialization completes. | Use Scenario: Safe shutdown and restart during disc ejection or laser power ramping events. IC Role / Device Role / Timing Role: Generates timed 140ms RESET pulse on VCC drop and immediate MROUT interrupt on user button press. Use Value: Enables data save to flash memory before full reboot, reducing boot-time latency. |
| Cable/DSL Modems | MP3 Players |
Use Scenario: Maintaining stable operation during PoE voltage sag or upstream line noise. IC Role / Device Role / Timing Role: Monitors 5V PoE-derived rail (VCC) and 1.8V PHY supply (RSTIN) with independent thresholds. Use Value: Avoids false resets from transient dips by requiring both rails to recover before deasserting RESET. | Use Scenario: Battery voltage decay management during playback or charging cycles. IC Role / Device Role / Timing Role: Uses RSTIN to track 3.0V LDO output while VCC monitors 3.3V codec supply. Use Value: Triggers graceful shutdown at 2.9V battery level while maintaining audio buffer integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6455UT31S+T | MR input controls both MROUT and RESET; includes 3.36s extended setup period for soft/hard reset combination | Supports single-button interrupt-before-reset functionality; requires no external logic for dual-mode reset | Select when system requires coordinated NMI + hard reset from one pushbutton |
| TPS3808G33DBVR | Single-supply supervisor; 3.3V fixed threshold; open-drain RESET; no RSTIN input or manual reset output | Lacks dual-rail monitoring and manual reset capability; suitable only for basic VCC-only supervision | Select only for cost-sensitive, single-rail applications where RSTIN and MROUT are unnecessary |
Compared with MAX6453UT31S+T, MAX6455UT31S+T adds MR-controlled RESET assertion for unified reset control, while TPS3808G33DBVR omits RSTIN and MROUT entirely - making it unsuitable for applications requiring secondary rail supervision or user-initiated interrupts.
Availability
MAX6453UT31S+T is available at Aetrix Electronics and suitable for set-top boxes, DVD players, and cable/DSL modems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6453UT31S+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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, interface, and reliability-critical applications.
The MAX6453–MAX6456 family was designed specifically for dual-rail microprocessor supervision in consumer electronics, offering factory-set VCC thresholds, adjustable RSTIN inputs, and independent manual reset outputs to simplify power sequencing and improve system robustness.
FAQ
What is the exact VCC reset threshold voltage for MAX6453UT31S+T?
The MAX6453UT31S+T has a factory-set VCC reset threshold of 3.075V, with a guaranteed range of 3.00V to 3.15V at +25°C and ±60ppm/°C tempco over –40°C to +85°C. This value is encoded in the "31" suffix per Table 1 and applies exclusively to the VCC pin - not RSTIN, which uses a fixed 0.63V internal reference.
Does MAX6453UT31S+T support monitoring a secondary voltage below 1.0V?
Yes, MAX6453UT31S+T supports monitoring secondary voltages as low as 0.63V via the RSTIN pin, using an external resistor divider. The internal RSTIN comparator threshold is fixed at 0.630V ±0.015V, allowing precise scaling - for example, a 0.8V rail can be monitored by setting R1/R2 ratio to achieve 0.63V at RSTIN when VMON = 0.8V.
How does the manual reset function work on MAX6453UT31S+T?
On MAX6453UT31S+T, pulling MR low immediately asserts MROUT (active-low push-pull), which remains low for ≥140ms after MR returns high. Crucially, MR has no effect on the RESET output - that is controlled solely by VCC and RSTIN thresholds. This decoupling enables use of MROUT as a nonmaskable interrupt (NMI) without forcing a full system reboot.
What is the supply current consumption of MAX6453UT31S+T at 3.3V?
At VCC = 3.3V and TA = +25°C, MAX6453UT31S+T draws 6µA typical supply current (ICC), with a maximum of 16µA over temperature. This ultra-low quiescent current is achieved through BiCMOS process optimization and makes the device suitable for battery-powered or energy-harvesting applications where standby power must be minimized.
Is MAX6453UT31S+T pin-compatible with other devices in the MAX6453–MAX6456 family?
Yes, MAX6453UT31S+T shares identical SOT23-6 pinout and footprint with all MAX6453–MAX6456 variants, including MAX6454UT31S+T, MAX6455UT31S+T, and MAX6456UT31S+T. However, functional differences exist: MAX6453/MAX6454 have MR-controlled MROUT only, while MAX6455/MAX6456 allow MR to control both MROUT and RESET - so PCB layout is compatible but firmware/system logic may require adjustment.
MAX6453UT31S+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:
- 3.075V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6453UT31S+T FAQ
1.How can I place an order for MAX6453UT31S+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6453UT31S+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 MAX6453UT31S+T reliable?
The price and inventory of MAX6453UT31S+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6453UT31S+T is usually 5 days.
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Once your MAX6453UT31S+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 MAX6453UT31S+T?
For technical support, including MAX6453UT31S+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6453UT31S+T requirements.
6.How does Aetrix verify that MAX6453UT31S+T is sourced from the original manufacturer or authorized distributors?
All MAX6453UT31S+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 MAX6453UT31S+T meets industry standards.
7.What is the process for return or replacement of MAX6453UT31S+T?
All MAX6453UT31S+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6453UT31S+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 MAX6453UT31S+T part is unused and in its original packaging.
Return procedure for MAX6453UT31S+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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