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Analog Devices Inc./Maxim Integrated MAX6422XS16+T
- Part No.:
- MAX6422XS16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6422XS16+T.pdf
- Description:
- IC MPU/RESET CIRC 1.575V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,463
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Product details
Overview
MAX6422XS16+T from Analog Devices is a low-power, active-high push-pull microprocessor reset supervisor IC designed for precise VCC monitoring in space-constrained systems. It asserts a high-level RESET signal when supply voltage falls below 1.575V (typ), holds it for a capacitor-adjustable timeout (e.g., 4.375ms with 1500pF), and guarantees valid output down to VCC = 1V. Used in battery-powered controllers and portable medical instruments requiring reliable power-on reset.
For engineers reviewing the MAX6422XS16+T datasheet, MAX6422XS16+T pinout, MAX6422XS16+T application, or MAX6422XS16+T equivalent, key selection criteria include its 1.575V reset threshold accuracy (±1.5% at +25°C), 1.6µA typical quiescent current, SC70-4 package footprint, and active-high push-pull output compatible with 1.8V–5V µP reset inputs.
Technical Context
The MAX6422XS16+T implements a precision bandgap-based voltage detector with laser-trimmed resistors to set its 1.575V nominal reset threshold. Its internal 240nA SRT ramp current source charges an external capacitor to generate a programmable reset timeout, decoupling delay timing from process/voltage/temperature variation.
Unlike open-drain variants, the MAX6422XS16+T features a push-pull output stage capable of sourcing 200µA at 0.8×VCC and sinking 500µA at 0.3V - eliminating need for external pull-up resistors while ensuring fast, rail-to-rail logic transitions into CMOS inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V (typ), ±1.5% accuracy at +25°C - ensures deterministic reset assertion across 1.6V–5V system supplies |
| Quiescent Current | 1.6µA (typ) at VCC ≤ 2.0V - enables multi-year operation on coin-cell batteries in portable equipment |
| Reset Timeout Range | 275µs to >6ms (capacitor-adjustable via SRT pin) - supports µP initialization sequences from fast-boot MCUs to complex SoCs |
| Operating Voltage | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| Output Type | Active-high push-pull - drives µP reset input directly without pull-up resistor, reducing BOM count and layout area |
| Temperature Range | −40°C to +125°C - qualified for automotive under-hood and industrial embedded applications |
| VCC to Reset Delay | 80µs (max) - provides rapid response to supply collapse, preventing illegal code execution |
Pinout & Package
MAX6422XS16+T is housed in a 4-pin SC70-4 package (package code X4+1, outline 21-0098), measuring 1.25mm × 1.65mm × 0.95mm, optimized for high-density PCB layouts in portable and wearable devices.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset threshold comparison |
| 2 | RESET | Active-high push-pull output - drives high during normal operation, pulls low only during reset assertion |
| 3 | SRT | Set-reset-time input - connects to external capacitor to program timeout period via 240nA constant-current ramp |
| 4 | VCC | Supply voltage and monitored rail - powers device and serves as input to precision voltage detector |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tuning of reset duration (275µs–6ms+) to match specific µP requirements without firmware changes |
| Guaranteed reset validity to VCC = 1V | Ensures clean, glitch-free reset signaling even during severe brownout, preventing partial initialization failures |
| Immunity to short VCC transients | Rejects <50µs negative glitches ≥100mV below threshold - eliminates false resets from switching noise or ESD |
| Low-leakage SRT pin interface | Minimizes timeout drift caused by PCB leakage; requires ceramic capacitor (<10nA leakage) for stable timing |
| Laser-trimmed reset threshold | Delivers ±1.5% accuracy at +25°C and ±2.5% over full temperature range - reduces need for system-level calibration |
Applications
| Battery-Powered Portable Instruments | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Handheld glucose meters and portable ECG monitors powered by single Li-ion cells with wide discharge profiles (4.2V → 3.0V). IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET to microcontroller upon crossing 1.575V threshold during power-down, ensuring safe shutdown before memory corruption. Use Value: 1.6µA quiescent current extends battery life beyond 3 years; SC70-4 footprint saves >0.8mm² board area vs. SOT23 alternatives. |
Use Scenario: Door module ECUs exposed to load-dump and cold-crank conditions where VCC dips to 1.8V during engine start. IC Role / Device Role / Timing Role: Provides robust reset supervision with guaranteed operation down to VCC = 1V and transient immunity up to 50µs/100mV. Use Value: −40°C to +125°C rating and AEC-Q100-aligned design (per MAX6340UK31/V+T variant family) support automotive qualification without derating. |
| Industrial Sensor Nodes | Medical Infusion Pumps |
|
Use Scenario: Wireless sensor nodes operating on primary lithium batteries in remote locations with infrequent maintenance cycles. IC Role / Device Role / Timing Role: Generates a 4.375ms active-high reset pulse (with 1500pF SRT cap) to initialize ARM Cortex-M0+ MCU after cold boot or brownout recovery. Use Value: Push-pull output eliminates external pull-up resistor, reducing component count and failure modes in long-life deployments. |
Use Scenario: Safety-critical infusion pumps requiring fail-safe power-on reset to prevent unintended motor activation. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail and asserts RESET until VCC stabilizes above 1.575V for ≥4.375ms, meeting IEC 62304 Class C software safety requirements. Use Value: ±2.5% reset threshold tolerance over temperature ensures deterministic behavior across clinical operating environments (10°C–40°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6421XS16+T | Active-low push-pull RESET output; identical threshold, timing, and package | Requires µP with active-low reset input; incompatible with active-high-only designs | Select when interfacing with legacy µPs expecting inverted reset polarity |
| TLV803EB16DBZR | Fixed 1.6V threshold, no capacitor-adjustable timeout; 0.5µA IQ; SOT-23-3 package | Lacks programmable delay; smaller footprint but no timing flexibility for diverse µP families | Choose for ultra-low-power, cost-sensitive applications where fixed 200ms timeout suffices |
Compared with MAX6422XS16+T, MAX6421XS16+T offers identical supervision accuracy and low IQ but mandates active-low reset compatibility, while TLV803EB16DBZR trades timing adjustability for lower current and smaller size - making MAX6422XS16+T optimal where programmable delay and active-high drive are required.
Availability
MAX6422XS16+T is available at Aetrix Electronics and suitable for battery-powered portable instruments, automotive body control modules, and medical infusion pumps requiring stable component supply across extended product lifecycles.
Supply support for MAX6422XS16+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6422XS16+T belongs to the MAX6340/MAX6421–MAX6426 family of low-power µP supervisors, engineered specifically for reliable reset generation in energy-constrained and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6422XS16+T?
The MAX6422XS16+T has a nominal reset threshold of 1.575V, with ±1.5% accuracy at +25°C and ±2.5% over the full −40°C to +125°C operating range. This value is laser-trimmed at wafer test and confirmed in the Electrical Characteristics table under VTH parameter.
Does MAX6422XS16+T require an external pull-up resistor on the RESET pin?
No. The MAX6422XS16+T features an active-high push-pull RESET output capable of sourcing up to 200µA at 0.8×VCC and sinking 500µA at 0.3V. This eliminates the need for an external pull-up resistor, simplifying layout and reducing BOM cost compared to open-drain reset supervisors.
How is the reset timeout period set for MAX6422XS16+T?
The reset timeout period for MAX6422XS16+T is set by connecting a capacitor (CSRT) between the SRT pin and GND. The relationship is tRP = 2.73 × 10⁶ × CSRT + 275µs, where tRP is in seconds and CSRT in farads. A 1500pF capacitor yields ~4.375ms timeout.
What package type and dimensions does MAX6422XS16+T use?
MAX6422XS16+T uses the SC70-4 package (code X4+1), measuring 1.25mm × 1.65mm × 0.95mm with a 0.65mm pitch. This ultra-small footprint is ideal for space-constrained portable and wearable electronics where board area is at a premium.
Is MAX6422XS16+T qualified for automotive applications?
While MAX6422XS16+T itself is not individually AEC-Q100 certified, it belongs to the same family as the AEC-Q100-qualified MAX6340UK31/V+T. Its −40°C to +125°C operating range, robust transient immunity, and production-tested reliability make it suitable for automotive body electronics where formal qualification is not mandated.
MAX6422XS16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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 High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6422XS16+T FAQ
1.How can I place an order for MAX6422XS16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6422XS16+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 MAX6422XS16+T reliable?
The price and inventory of MAX6422XS16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6422XS16+T is usually 5 days.
3.What payment methods are accepted for MAX6422XS16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6422XS16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6422XS16+T?
MAX6422XS16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6422XS16+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 MAX6422XS16+T?
For technical support, including MAX6422XS16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6422XS16+T requirements.
6.How does Aetrix verify that MAX6422XS16+T is sourced from the original manufacturer or authorized distributors?
All MAX6422XS16+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 MAX6422XS16+T meets industry standards.
7.What is the process for return or replacement of MAX6422XS16+T?
All MAX6422XS16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6422XS16+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 MAX6422XS16+T part is unused and in its original packaging.
Return procedure for MAX6422XS16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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