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Analog Devices Inc./Maxim Integrated MAX6422XS22+T
- Part No.:
- MAX6422XS22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6422XS22+T.pdf
- Description:
- IC MPU/RESET CIRC 2.188V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,872
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Product details
Overview
MAX6422XS22+T from Analog Devices is a low-power, active-high push-pull microprocessor supervisor IC that monitors VCC supply voltage and asserts a reset signal when voltage falls below 2.188V (typical), with capacitor-adjustable timeout (3.0–5.75ms at CSRT = 1500pF), guaranteed valid down to VCC = 1V, and 1.6µA typical quiescent current - used in battery-powered controllers and portable equipment for reliable power-on reset sequencing.
For engineers reviewing the MAX6422XS22+T datasheet, MAX6422XS22+T pinout, MAX6422XS22+T application, or MAX6422XS22+T equivalent, key selection criteria include its 2.188V reset threshold accuracy (±2.5% over temperature), SC70-4 package footprint, active-high push-pull output drive capability (VOH ≥ 0.8×VCC, VOL ≤ 0.4V), and immunity to sub-50µs VCC transients.
Technical Context
The MAX6422XS22+T implements a precision voltage detector with laser-trimmed internal resistors setting a nominal 2.188V reset threshold, referenced to an internal 0.65V ramp comparator. Its SRT pin sources a stable 240nA current to charge an external capacitor, determining reset timeout via dV/dt = I/C.
It features active-high push-pull RESET logic - inverse of MAX6421/MAX6423 open-drain variants - with guaranteed output validity down to VCC = 1V, and operates across –40°C to +125°C without requiring external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.188V (typ), ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature ranges |
| Quiescent Current | 1.6µA (typ) at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout | 3.0–5.75ms (CSRT = 1500pF) - configurable via external capacitor to match µP reset hold-time requirements |
| Output Type | Active-high push-pull - drives RESET line directly without external pull-up, simplifying BOM and layout |
| VCC Range | 1.0V to 5.5V - supports wide-input systems including 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails |
| Transient Immunity | No reset issued for VCC glitches ≤ 50µs duration at 100mV overdrive - prevents false resets during digital noise events |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6422XS22+T is housed in a 4-pin SC70-4 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish ("+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal circuitry and SRT current sink; must connect to low-impedance system ground plane |
| 2 - VCC | Supply and monitor input | Power source and monitored rail; valid operation starts at 1.0V; reset assertion occurs when VCC drops below 2.188V |
| 3 - SRT | Reset timeout capacitor interface | Sources precise 240nA current; connects to ground via CSRT to set timeout period (tRP = 2.73×10⁶×CSRT + 275µs) |
| 4 - RESET | Active-high push-pull output | Drives high (≥0.8×VCC) when VCC ≥ threshold; drives low (≤0.4V) during reset; no external pull-up required |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed reset threshold | 2.188V with ±2.5% tolerance over full temperature range - eliminates need for external calibration or trimming |
| Capacitor-adjustable timeout | Configurable 0.275ms to >10ms using 0–10nF ceramic capacitor - matches diverse µP reset timing requirements |
| Ultra-low ICC | 1.6µA typical at 2.0V - extends battery life in always-on monitoring applications |
| VCC = 1V operation guarantee | RESET remains valid down to 1.0V supply - ensures deterministic behavior during deep brownout conditions |
| SC70-4 footprint | 2.0mm × 2.1mm body size - enables compact designs in space-constrained portable and wearable devices |
Applications
| Battery-Powered Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Microcontroller-based glucose meter operating from a single CR2032 coin cell with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervises 3.0V regulated rail and asserts active-high RESET to initialize MCU on power-up and brownout recovery. Use Value: 1.6µA quiescent current minimizes standby drain; 2.188V threshold aligns with battery end-of-life voltage to prevent erratic firmware execution. | Use Scenario: Handheld ECG monitor with dual-voltage system (1.8V logic, 3.3V analog) and strict safety-critical reset reliability. IC Role / Device Role / Timing Role: Monitors 3.3V analog supply and triggers active-high RESET to halt data acquisition until stable power is confirmed. Use Value: Guaranteed RESET validity down to VCC = 1V prevents spurious resets during rapid battery depletion; SC70-4 footprint saves PCB area in handheld enclosure. |
| Automotive Body Control Modules | Industrial Sensor Nodes |
Use Scenario: LIN bus node in door module exposed to load-dump and cold-crank conditions (-40°C to +125°C). IC Role / Device Role / Timing Role: Resets 32-bit ARM Cortex-M MCU when 5V supply dips below 2.188V during cranking transients. Use Value: Immunity to ≤50µs VCC glitches avoids false resets during ignition noise; AEC-Q100-compatible family derivatives support qualification paths. | Use Scenario: Wireless vibration sensor node powered by energy harvester with variable 1.2–4.5V output. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for ultra-low-power MSP430 MCU across wide input range. Use Value: 1.0–5.5V VCC range accommodates harvester output swing; capacitor-adjustable timeout adapts to varying startup delays of RF subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6421XS22+T | Active-low push-pull RESET output; identical threshold, package, and electrical specs otherwise | Requires inverted reset logic on host µP; not suitable where active-high assertion is mandated by system architecture | Select MAX6421XS22+T only if µP reset pin is active-low and board layout allows signal inversion |
| TLV803EB22DBZR | 2.2V threshold, active-high open-drain output, 0.5µA ICC, SOT-23-3 package | Lacks capacitor-adjustable timeout (fixed 200ms); requires external pull-up; smaller package but no SRT pin | Choose TLV803EB22DBZR for cost-sensitive, fixed-timing applications where 3-pin simplicity outweighs timeout flexibility |
Compared with MAX6422XS22+T, MAX6421XS22+T offers identical supervision accuracy and low power but mandates active-low µP interface, while TLV803EB22DBZR trades adjustable timeout and push-pull drive for lower ICC and smaller footprint - making MAX6422XS22+T optimal for systems needing precise, user-configurable reset hold time without external components.
Availability
MAX6422XS22+T is available at Aetrix Electronics and suitable for battery-powered controllers, portable medical devices, and automotive body electronics requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6422XS22+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.
The MAX6421–MAX6426 family was designed specifically for ultra-low-power, precision voltage monitoring in space- and energy-constrained embedded systems - emphasizing reset reliability, temperature stability, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MAX6422XS22+T and how does it vary with temperature?
The MAX6422XS22+T has a nominal reset threshold of 2.188V (typical), with factory laser trimming ensuring ±1.5% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This tight tolerance eliminates need for system-level recalibration and ensures consistent brownout response across environmental extremes. The MAX6422XS22+T datasheet provides normalized threshold vs. temperature curves confirming monotonic drift within spec.
Does MAX6422XS22+T require an external pull-up resistor on the RESET pin?
No, MAX6422XS22+T does not require an external pull-up resistor because it features an active-high push-pull RESET output. The internal driver actively pulls RESET high (≥0.8×VCC) when deasserted and low (≤0.4V) when asserted. This eliminates BOM cost and layout complexity associated with open-drain supervisors like MAX6423XS22+T, and ensures robust logic levels across its 1.0–5.5V VCC range.
How is the reset timeout period set on MAX6422XS22+T, and what capacitor value yields a 4.5ms delay?
The reset timeout period on MAX6422XS22+T is set by connecting a capacitor (CSRT) between the SRT pin and GND. Using the formula tRP = 2.73×10⁶ × CSRT + 275µs (with tRP in seconds and CSRT in farads), a 4.5ms timeout requires CSRT ≈ 1550pF. A standard 1500pF X7R ceramic capacitor yields 4.375ms (typ), well within the 3.0–5.75ms spec band at VCC = 5V. The MAX6422XS22+T datasheet confirms this relationship in Figure toc02.
Can MAX6422XS22+T operate reliably when VCC drops below 1.5V?
Yes, MAX6422XS22+T guarantees valid RESET output functionality down to VCC = 1.0V, per its Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.2V, it maintains VOH ≥ 0.8×VCC and VOL ≤ 0.4V under specified load conditions, enabling safe reset assertion during deep brownout. This capability is critical for battery-powered systems nearing end-of-life, and is explicitly validated for MAX6422XS22+T across –40°C to +125°C.
What package type and dimensions does MAX6422XS22+T use, and is it RoHS-compliant?
MAX6422XS22+T uses the SC70-4 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. The "+T" suffix denotes lead(Pb)-free, RoHS-compliant construction per Analog Devices' packaging standards. Land pattern 90-0187 is recommended, and the device ships in tape-and-reel format only - fully compatible with automated SMT assembly processes used for high-volume portable electronics manufacturing.
MAX6422XS22+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.188V
- 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
MAX6422XS22+T FAQ
1.How can I place an order for MAX6422XS22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6422XS22+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 MAX6422XS22+T reliable?
The price and inventory of MAX6422XS22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6422XS22+T is usually 5 days.
3.What payment methods are accepted for MAX6422XS22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6422XS22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6422XS22+T?
MAX6422XS22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6422XS22+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 MAX6422XS22+T?
For technical support, including MAX6422XS22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6422XS22+T requirements.
6.How does Aetrix verify that MAX6422XS22+T is sourced from the original manufacturer or authorized distributors?
All MAX6422XS22+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 MAX6422XS22+T meets industry standards.
7.What is the process for return or replacement of MAX6422XS22+T?
All MAX6422XS22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6422XS22+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 MAX6422XS22+T part is unused and in its original packaging.
Return procedure for MAX6422XS22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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