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Analog Devices Inc./Maxim Integrated MAX6422XS29+T
- Part No.:
- MAX6422XS29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6422XS29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
MAX6422XS29+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 2.925V (min), 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 equipment requiring reliable power-on reset sequencing.
For engineers reviewing the MAX6422XS29+T datasheet, MAX6422XS29+T pinout, MAX6422XS29+T application, or MAX6422XS29+T equivalent, key selection criteria include its 2.925V–2.998V factory-trimmed reset threshold, 1.6µA typical quiescent current, SC70-4 package footprint, and active-high push-pull output compatible with 1.6V–5.5V VCC rails.
Technical Context
The MAX6422XS29+T implements a precision voltage detector with laser-trimmed internal resistors to set its nominal 2.925V reset threshold, with ±1.5% accuracy at +25°C and ±2.5% over –40°C to +125°C. Its SRT pin sources a stable 240nA ramp current to charge an external capacitor, generating a reset timeout period defined by tRP = 2.73×10⁶ × CSRT + 275µs.
Unlike open-drain variants, the MAX6422XS29+T features a push-pull output capable of sourcing 200µA at 0.8×VCC (VCC ≥ 1.8V) and sinking 500µA while maintaining VOL ≤ 0.3V - eliminating need for external pull-up components and enabling direct interface with CMOS µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V (min) to 2.998V (max); factory-laser-trimmed for stable brownout detection at ~2.925V nominal |
| Quiescent Current | 1.6µA (typ) at VCC ≤ 2.0V; enables multi-year operation in coin-cell–powered systems |
| Reset Timeout Range | 275µs (CSRT = 0) to >6ms (CSRT = 2.2nF); adjustable via external capacitor on SRT pin |
| Output Type | Active-high push-pull; drives RESET high without external components, compatible with standard µP reset inputs |
| Operating Voltage | 1.0V to 5.5V VCC; ensures valid RESET assertion even during deep brownout down to 1V supply |
| Temperature Range | –40°C to +125°C; qualified for automotive and industrial environments without derating |
| VCC to Reset Delay | 80µs (typ); fast response to supply droop prevents premature µP execution during power-up |
Pinout & Package
MAX6422XS29+T is housed in a 4-pin SC70-4 package (package code X4+1), measuring 2.0mm × 2.1mm × 0.95mm, optimized for ultra-compact PCB layouts in portable and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal circuitry and SRT ramp current; must be low-impedance connection to system ground plane |
| 2 - VCC | Supply and threshold monitor input | Primary power rail input; voltage monitored against internal reference to trigger reset assertion |
| 3 - SRT | Set Reset Timeout input | Connects to external timing capacitor; 240nA constant-current source charges CSRT to generate programmable delay |
| 4 - RESET | Active-high push-pull reset output | Drives high to reset µP upon VCC drop; sinks current to deassert; no external pull-up required |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset hold time (275µs–6ms+) to match µP requirements without firmware changes |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing undefined µP state before full power recovery |
| Immunity to short VCC transients | Rejects glitches ≤50µs duration when VCC dips 100mV below threshold, avoiding spurious resets in noisy environments |
| Low-leakage SRT pin design | Minimizes timing error from board leakage; requires short trace routing and avoidance of adjacent high-speed signals |
| Factory-trimmed reset threshold | 2.925V nominal with ±1.5% initial accuracy eliminates need for external calibration or trimming components |
Applications
| Battery-Powered Portable Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: A handheld medical diagnostic device powered by a single Li-ion cell experiences gradual discharge and occasional load-induced voltage sag. IC Role / Device Role / Timing Role: MAX6422XS29+T monitors VCC and asserts active-high RESET if voltage drops below 2.925V, holding µP in reset until stable supply returns and timeout expires. Use Value: Prevents corrupted memory writes or erratic sensor sampling during brownout, ensuring data integrity and safe shutdown. |
Use Scenario: A body control module (BCM) in a passenger vehicle operates across wide temperature and supply ranges, including cold-crank conditions. IC Role / Device Role / Timing Role: MAX6422XS29+T provides robust power-on reset with guaranteed operation down to –40°C and VCC = 1V, interfacing directly with 3.3V µP reset input. Use Value: Eliminates need for discrete RC network and level-shifting, reducing BOM count and improving startup reliability under marginal battery conditions. |
| Industrial IoT Edge Sensor Nodes | Set-Top Box Power Management |
|
Use Scenario: A wireless environmental sensor node uses intermittent energy harvesting and sleeps between transmissions. IC Role / Device Role / Timing Role: MAX6422XS29+T supervises the 1.8V LDO output, asserting RESET during low-energy states and releasing only after stable voltage and programmable delay. Use Value: Ultra-low 1.6µA quiescent current extends battery life; capacitor-adjustable timeout synchronizes wake-up with regulator stabilization. |
Use Scenario: A consumer set-top box must recover cleanly from AC line interruptions and power cycling without firmware corruption. IC Role / Device Role / Timing Role: MAX6422XS29+T monitors the 5V main rail and generates a 4.375ms active-high RESET pulse using 1500pF on SRT, meeting µP minimum reset width requirement. Use Value: Push-pull output ensures fast, clean reset edge without pull-up resistor parasitics, improving noise immunity during power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6421XS29+T | Identical SC70-4 package and 2.925V threshold, but features active-low push-pull RESET output | Requires µP with active-low reset input; incompatible with active-high-only designs without logic inversion | Select when system architecture mandates active-low reset signaling and no level translation is desired |
| MAX6424UK29+T | Same 2.925V threshold and active-high push-pull output, but in 5-pin SOT23-5 package with N.C. pin | Larger footprint and different pinout; not drop-in replaceable due to extra pin and layout mismatch | Choose when SOT23-5 is preferred for assembly compatibility or thermal performance, accepting PCB redesign |
Compared with MAX6421XS29+T and MAX6424UK29+T, the MAX6422XS29+T uniquely combines active-high push-pull drive, SC70-4 compactness, and 2.925V threshold in a single optimized package-making it the only choice for space-constrained designs requiring direct active-high µP reset assertion without layout or logic adaptation.
Availability
MAX6422XS29+T is available at Aetrix Electronics and suitable for battery-powered portable controllers, automotive body control modules, and industrial IoT edge sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6422XS29+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 MAX6422XS29+T belongs to the MAX6340/MAX6421–MAX6426 family of ultra-low-power microprocessor supervisors, engineered specifically for reliable power-monitoring in energy-sensitive and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage range for MAX6422XS29+T?
The MAX6422XS29+T has a factory-trimmed reset threshold range of 2.925V (minimum) to 2.998V (maximum) at +25°C, with ±2.5% tolerance over the full –40°C to +125°C operating temperature range. This corresponds to the "29" suffix per Table 1 in the datasheet, and is laser-trimmed for precision without external components.
Does MAX6422XS29+T require an external pull-up resistor on the RESET pin?
No, MAX6422XS29+T does not require an external pull-up resistor because it features an active-high push-pull RESET output. The internal driver actively sources current to pull RESET high and sinks current to pull it low, enabling direct connection to standard CMOS µP reset inputs without additional passive components.
How is the reset timeout period set for MAX6422XS29+T?
The reset timeout period for MAX6422XS29+T is set by connecting an external capacitor (CSRT) between the SRT pin and GND. The relationship is tRP = 2.73 × 10⁶ × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. A 1500pF capacitor yields a typical timeout of 4.375ms.
What package type and dimensions does MAX6422XS29+T use?
MAX6422XS29+T uses the SC70-4 package (package code X4+1), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pitch. It is lead(Pb)-free ("+T" suffix), RoHS-compliant, and supplied in tape-and-reel format for automated assembly.
Can MAX6422XS29+T operate reliably below 1.6V supply voltage?
Yes, MAX6422XS29+T is specified to operate down to VCC = 1.0V and guarantees valid RESET output down to VCC = 1.0V. Its internal circuitry remains functional and the push-pull output maintains specified VOL and VOH levels even at 1.0V, supporting ultra-low-voltage brownout detection.
MAX6422XS29+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:
- 2.925V
- 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
MAX6422XS29+T FAQ
1.How can I place an order for MAX6422XS29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6422XS29+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 MAX6422XS29+T reliable?
The price and inventory of MAX6422XS29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6422XS29+T is usually 5 days.
3.What payment methods are accepted for MAX6422XS29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6422XS29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6422XS29+T?
MAX6422XS29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6422XS29+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 MAX6422XS29+T?
For technical support, including MAX6422XS29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6422XS29+T requirements.
6.How does Aetrix verify that MAX6422XS29+T is sourced from the original manufacturer or authorized distributors?
All MAX6422XS29+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 MAX6422XS29+T meets industry standards.
7.What is the process for return or replacement of MAX6422XS29+T?
All MAX6422XS29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6422XS29+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 MAX6422XS29+T part is unused and in its original packaging.
Return procedure for MAX6422XS29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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