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Analog Devices Inc./Maxim Integrated MAX6468US16D3
- Part No.:
- MAX6468US16D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US16D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-4
- Quantity:
- Payment:
- Shipping:
Inventory:919
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Product details
Overview
MAX6468US16D3 from Maxim Integrated is a push-pull, active-low microprocessor supervisory reset circuit in SOT143-4 package, monitoring +1.8V supplies with factory-trimmed 1.575V threshold (±2.5% over -40°C to +85°C), 150ms minimum reset timeout, and valid RESET output down to VCC = +1V. It ensures reliable power-on reset and brownout detection in automotive-grade embedded control systems.
For engineers reviewing the MAX6468US16D3 datasheet, MAX6468US16D3 pinout, MAX6468US16D3 application, or MAX6468US16D3 equivalent, key selection criteria include its edge-triggered manual reset with 150ms one-shot pulse, push-pull output eliminating external pull-up, immunity to <100ns MR glitches, and guaranteed operation across -40°C to +125°C.
Technical Context
The MAX6468US16D3 implements a precision bandgap-based voltage monitor with hysteresis-free threshold detection and an internal edge-triggered monostable for MR input. Its reset assertion logic combines VCC under-voltage detection and MR falling-edge capture, with independent 150ms timeout timers for both events.
It features a push-pull RESET output capable of sourcing up to 800µA at VCC ≥ +4.5V (VOH ≥ 0.8×VCC) and sinking 3.2mA (VOL ≤ 0.3V), enabling direct interface to µP reset inputs without external components. The 1.5kΩ internal MR pull-up resistor supports TTL/CMOS-compatible manual reset switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V (min), ±2.5% over -40°C to +85°C - precisely matches +1.8V supply brownout margin |
| Reset Timeout Period | 150ms (min) - meets typical µP minimum reset hold time requirements |
| Supply Current | 3µA at VCC = +1.8V - enables ultra-low-power battery-backed operation |
| Operating Voltage Range | +1.2V to +5.5V - supports wide-input systems including Li-ion and multi-rail designs |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor on RESET line |
| MR Glitch Rejection | 100ns - rejects contact bounce and EMI-induced noise on manual reset switch |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial environments |
Pinout & Package
MAX6468US16D3 is housed in a 4-pin SOT143-4 package (3.0mm × 1.6mm × 1.1mm), surface-mount, lead-free compatible, with exposed pad not connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for all internal circuitry; must be low-impedance connection to system ground plane |
| 2 RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR edge; sinks 3.2mA at VCC ≥ +4.5V |
| 3 MR | Edge-triggered manual reset input | Falling edge initiates 150ms one-shot reset pulse; internally pulled up to VCC via 1.5kΩ resistor |
| 4 VCC | Power and monitored supply | Provides operating power and serves as monitored rail; bypass with 0.1µF capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set threshold | 1.575V ±2.5% over -40°C to +85°C - eliminates calibration and external resistors for +1.8V systems |
| Edge-triggered MR with one-shot | 150ms fixed-duration RESET pulse per MR falling edge - prevents repeated resets from switch bounce |
| Push-pull RESET output | No external pull-up required - reduces BOM count and PCB area vs. open-drain alternatives |
| VCC-operated RESET validity | RESET remains functional down to VCC = +1V - ensures deterministic reset behavior during deep brownout |
| Automotive temperature grade | -40°C to +125°C operation - qualified for engine control, ADAS, and infotainment modules |
Applications
| Automotive Engine Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 1.8V core supply in engine ECU microcontroller during cold cranking and load dump transients. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET to MCU upon VCC drop below 1.575V or MR edge. Use Value: Guarantees clean reset initiation even when battery dips to 6V, with 150ms hold time meeting ISO 16750-2 transient immunity requirements. |
Use Scenario: Providing reliable power-on and brownout reset for 1.8V FPGA configuration logic in modular PLC backplane. IC Role / Device Role / Timing Role: Voltage supervisor ensuring FPGA enters known state before configuration begins. Use Value: Push-pull output drives FPGA reset pin directly; 3µA quiescent current minimizes standby power in always-on modules. |
| Medical Patient Monitor | DSL Modem Power Management |
Use Scenario: Reset supervision for 1.8V ADC and processor rails in portable ECG device with lithium coin-cell backup. IC Role / Device Role / Timing Role: Low-current supervisor maintaining reset integrity during battery switchover and voltage sag. Use Value: Valid RESET down to VCC = +1V prevents spurious resets during battery depletion; 100ns MR glitch rejection suppresses ESD-induced false triggers. |
Use Scenario: Brownout protection for 1.8V PHY controller in DSL modem during AC line sags and surge events. IC Role / Device Role / Timing Role: System-level reset coordinator responding to both supply faults and technician-initiated diagnostics. Use Value: Edge-triggered MR allows field service reset without hardware modification; SOT143 footprint fits space-constrained telecom modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US16D3 | Same SOT143-4 package, identical 1.575V threshold and 150ms timeout, but open-drain RESET output requiring external pull-up | Suitable where legacy board design already includes pull-up resistor; less optimal for new designs targeting minimal BOM | Select MAX6315US16D3 only if reusing existing open-drain reset net topology |
| TPS3808G16DBVR | 1.6V threshold (±0.5%), 200ms timeout, 1.8V–6.5V VCC range, push-pull output, but rated only to +85°C ambient | Limited to commercial/industrial environments; lacks automotive qualification and extended temperature support | Choose TPS3808G16DBVR for cost-sensitive non-automotive applications where tighter threshold tolerance is critical |
Compared with MAX6468US16D3, MAX6315US16D3 adds external component overhead while matching timing and threshold; TPS3808G16DBVR trades automotive reliability for tighter voltage accuracy and wider input range, making it unsuitable for under-hood deployment.
Availability
MAX6468US16D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical patient monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468US16D3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6467/MAX6468 product line delivers precision, low-power microprocessor supervisory circuits with edge-triggered manual reset and automotive-grade reliability-designed specifically for fault-tolerant embedded systems where deterministic reset behavior is critical.
FAQ
What is the exact reset threshold voltage of MAX6468US16D3 and how tightly is it specified?
The MAX6468US16D3 has a factory-trimmed reset threshold of 1.575V, with tolerance of ±2.5% over the -40°C to +85°C temperature range and ±3% over the full -40°C to +125°C range. This specification is guaranteed by design and verified in production testing at +25°C, ensuring precise brownout detection for +1.8V supply rails without external calibration components.
Does MAX6468US16D3 require an external pull-up resistor on the RESET pin?
No, MAX6468US16D3 does not require an external pull-up resistor because it features a push-pull RESET output. Unlike open-drain variants such as MAX6467US16D3, the MAX6468US16D3 actively drives HIGH (VOH ≥ 0.8×VCC) and LOW (VOL ≤ 0.3V) states, enabling direct connection to microcontroller reset inputs without additional passive components.
How does the manual reset function work on MAX6468US16D3?
The MAX6468US16D3 implements an edge-triggered, one-shot manual reset: a falling edge on the MR pin initiates a fixed 150ms (min) active-low RESET pulse, regardless of MR signal duration. Internal debounce ignores subsequent MR edges within 150ms after MR rises, preventing false triggers from switch bounce. An internal 1.5kΩ pull-up resistor allows MR to float if unused.
What is the minimum supply voltage at which MAX6468US16D3 guarantees valid RESET output?
MAX6468US16D3 guarantees valid RESET output down to VCC = +1V. Below this level, the internal circuitry cannot maintain proper logic states, so RESET behavior is undefined. This specification ensures robust reset assertion during deep brownout conditions common in automotive and battery-powered systems before complete power collapse.
Is MAX6468US16D3 qualified for automotive applications?
Yes, MAX6468US16D3 is fully qualified for automotive applications, with guaranteed operation over the -40°C to +125°C junction temperature range and compliance with AEC-Q100 stress test requirements. Its SOT143-4 package, low 3µA supply current, and immunity to short VCC transients make it suitable for engine control, body electronics, and ADAS subsystems.
MAX6468US16D3 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 FAQ
1.How can I place an order for MAX6468US16D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US16D3 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 reliable?
The price and inventory of MAX6468US16D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US16D3 is usually 5 days.
3.What payment methods are accepted for MAX6468US16D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US16D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US16D3?
MAX6468US16D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US16D3 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?
For technical support, including MAX6468US16D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US16D3 requirements.
6.How does Aetrix verify that MAX6468US16D3 is sourced from the original manufacturer or authorized distributors?
All MAX6468US16D3 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 meets industry standards.
7.What is the process for return or replacement of MAX6468US16D3?
All MAX6468US16D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US16D3, 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 part is unused and in its original packaging.
Return procedure for MAX6468US16D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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