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Analog Devices Inc./Maxim Integrated MAX6468US16D3-T
- Part No.:
- MAX6468US16D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US16D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,000
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Product details
Overview
MAX6468US16D3-T from Maxim Integrated is a push-pull output microprocessor supervisory circuit designed to monitor +1.8V supply rails and assert an active-low RESET signal when VCC drops below 1.575V (typ), with a 150ms minimum reset timeout, -40°C to +125°C operation, and edge-triggered manual reset input. It ensures reliable power-on reset and brownout recovery in automotive control modules.
For engineers reviewing the MAX6468US16D3-T datasheet, MAX6468US16D3-T pinout, MAX6468US16D3-T application, or MAX6468US16D3-T equivalent, this device delivers factory-trimmed threshold accuracy, immunity to switch bounce and voltage transients, low 3µA supply current at 1.8V, and guaranteed RESET validity down to VCC = +1V - critical for robust embedded system initialization.
Technical Context
The MAX6468US16D3-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below its 1.575V nominal threshold, triggering a fixed 150ms (min) reset timeout after VCC recovery. Its MR input uses internal timing logic to accept only the first falling edge and ignore subsequent bounces within a 150ms debounce window.
It features a push-pull RESET output capable of sourcing 500µA at 0.8×VCC (VCC ≥ 2.5V) and sinking 1.2mA while maintaining VOL ≤ 0.3V, eliminating external pull-up components. The device operates across 1.2V–5.5V supply range and remains functional down to VCC = +1V, enabling valid reset signaling during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V (typ), ±1.5% at +25°C; monitors +1.8V supplies with tight tolerance |
| Reset Timeout Period | 150ms (min), 300ms (max); ensures µP reset hold time meets boot-loader requirements |
| Supply Current | 3µA at VCC = +1.8V; enables ultra-low-power operation in battery-backed systems |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial environments |
| RESET Output Type | Active-low push-pull; eliminates need for external pull-up resistor and reduces BOM count |
| VCC Validity Range | RESET remains valid down to VCC = +1V; supports reset assertion during severe brownout |
| MR Input Debounce | 150ms rising-edge debounce period; prevents false resets from mechanical switch bounce |
Pinout & Package
MAX6468US16D3-T is housed in a 4-pin SOT143 package (U3+1 outline), measuring 1.3mm × 2.9mm × 1.0mm, optimized for space-constrained automotive and portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Return path for all internal circuitry and RESET output sink current |
| 2: RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR edge trigger; no external pull-up required |
| 3: MR | Manual reset input | Edge-triggered; falling edge initiates one-shot 150ms reset pulse; internal 1.5kΩ pull-up to VCC |
| 4: VCC | Power and monitored supply | Supplies device and serves as monitored rail; bypass with 0.1µF capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.575V threshold | Eliminates external resistor divider; guarantees ±1.5% accuracy at +25°C for +1.8V supply monitoring |
| Edge-triggered MR with one-shot | Ensures single, deterministic reset pulse per button press - no latch or sustained reset on held switch |
| 150ms reset timeout (D3) | Matches typical µP minimum reset assertion time for ARM Cortex-M and similar embedded controllers |
| Immunity to short VCC transients | Rejects glitches ≤100ns duration; avoids spurious resets during digital switching noise |
| Valid RESET down to VCC = +1V | Enables fail-safe reset signaling even during deep undervoltage events before power collapse |
Applications
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
|---|---|
|
Use Scenario: Monitors 1.8V core supply for microcontroller in door module ECU exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring clean boot after voltage recovery from transient dips. Use Value: Factory-trimmed 1.575V threshold and 150ms timeout guarantee reset assertion meets ISO 16750-2 pulse 4a/b requirements. |
Use Scenario: Provides power-on and brownout reset for FPGA configuration controller in modular I/O rack. IC Role / Device Role / Timing Role: Voltage supervisor with edge-triggered MR for field-service reset without firmware intervention. Use Value: Push-pull RESET output drives FPGA PROG_B pin directly; no pull-up needed, reducing layout complexity. |
| Medical Infusion Pump Controller | DSL Modem Power Management |
|
Use Scenario: Ensures safe restart of safety-critical MCU after battery swap or AC adapter reconnection. IC Role / Device Role / Timing Role: Fail-safe reset source with guaranteed operation down to VCC = +1V during transition. Use Value: Low 3µA quiescent current extends backup battery life; -40°C to +125°C rating supports wide ambient operation. |
Use Scenario: Monitors 1.8V PHY supply in DSL line card subjected to repeated power cycling and ESD events. IC Role / Device Role / Timing Role: Reset supervisor with MR debounce preventing false resets from noisy front-panel buttons. Use Value: 150ms MR debounce window rejects mechanical switch bounce; improves field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US29D3-T | Higher 2.925V reset threshold; same SOT143 package and D3 timeout; open-drain RESET output | Designed for +3.3V supply monitoring, not +1.8V; requires external pull-up resistor | Select when monitoring 3.3V rails and open-drain flexibility is needed; not a drop-in replacement for 1.575V threshold |
| TLV803EB29DBZR | 2.93V threshold; 200ms min timeout; SOT-23-3 package; 0.5µA supply current; no MR input | Lacks manual reset functionality; smaller footprint but no edge-triggered reset capability | Choose for ultra-low-power +3.3V monitoring where MR is unnecessary; incompatible pinout and missing MR feature |
Compared with MAX6468US16D3-T, MAX6315US29D3-T serves different supply rails and requires external pull-up, while TLV803EB29DBZR omits MR entirely and uses a 3-pin package - neither offers the precise 1.575V threshold, push-pull output, or MR debounce of the MAX6468US16D3-T.
Availability
MAX6468US16D3-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and DSL modems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468US16D3-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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets.
The MAX6467/MAX6468 product line delivers precision, low-power supervisory circuits with factory-trimmed thresholds and robust manual reset for mission-critical embedded systems requiring guaranteed reset behavior over temperature.
FAQ
What is the exact reset threshold voltage of the MAX6468US16D3-T?
The MAX6468US16D3-T has a factory-trimmed nominal reset threshold of 1.575V, with tolerance of ±1.5% at +25°C and ±2.5% over -40°C to +85°C. This value is specifically calibrated to monitor +1.8V supply rails and is documented in the Reset Threshold table of the MAX6467/MAX6468 datasheet. The "16" suffix in MAX6468US16D3-T directly encodes this 1.575V threshold.
Does the MAX6468US16D3-T require an external pull-up resistor on the RESET pin?
No, the MAX6468US16D3-T features a push-pull RESET output, so it does not require an external pull-up resistor. Unlike the open-drain MAX6467 variant, the MAX6468US16D3-T actively drives RESET high when not asserted, simplifying board design and reducing component count. This is confirmed in the Pin Description and Electrical Characteristics sections of the datasheet.
What is the function of the MR pin on the MAX6468US16D3-T?
The MR (Manual Reset) pin on the MAX6468US16D3-T is an edge-triggered input that initiates a fixed 150ms (min) one-shot RESET pulse on its falling edge. It includes built-in 150ms rising-edge debounce to reject switch bounce, and features an internal 1.5kΩ pull-up to VCC - allowing MR to be left unconnected if unused. This behavior is explicitly defined in the Applications Information section.
Is the MAX6468US16D3-T suitable for automotive applications?
Yes, the MAX6468US16D3-T is specified for operation from -40°C to +125°C and is packaged in the automotive-qualified SOT143 format. Its electrical characteristics - including reset threshold stability, transient immunity, and guaranteed RESET validity down to VCC = +1V - meet requirements for under-hood and body-control applications. The datasheet explicitly lists "Automotive Products" in its Applications section.
How does the MAX6468US16D3-T handle short voltage transients on VCC?
The MAX6468US16D3-T is immune to short-duration VCC transients up to 100ns, as verified by the MR Glitch Rejection specification and the Maximum Transient Duration vs. Reset Threshold Overdrive graph in the Typical Operating Characteristics. This immunity prevents false resets caused by digital switching noise or ESD-induced supply disturbances, a key design feature highlighted in the Applications Information section.
MAX6468US16D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6468US16D3-T FAQ
1.How can I place an order for MAX6468US16D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US16D3-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 MAX6468US16D3-T reliable?
The price and inventory of MAX6468US16D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US16D3-T is usually 5 days.
3.What payment methods are accepted for MAX6468US16D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US16D3-T transactions.
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4.How is shipping managed for MAX6468US16D3-T?
MAX6468US16D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US16D3-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 MAX6468US16D3-T?
For technical support, including MAX6468US16D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US16D3-T requirements.
6.How does Aetrix verify that MAX6468US16D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6468US16D3-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 MAX6468US16D3-T meets industry standards.
7.What is the process for return or replacement of MAX6468US16D3-T?
All MAX6468US16D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US16D3-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 MAX6468US16D3-T part is unused and in its original packaging.
Return procedure for MAX6468US16D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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