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Analog Devices Inc./Maxim Integrated MAX6422XS26+T
- Part No.:
- MAX6422XS26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6422XS26+T.pdf
- Description:
- IC MPU/RESET CIRC 2.63V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,770
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Product details
Overview
The MAX6422XS26+T from Analog Devices is a low-power, active-high push-pull microprocessor supervisor IC that monitors VCC supply voltage (2.559V to 2.691V threshold) and asserts a reset signal during brownout, power-up, or power-down events. It features capacitor-adjustable reset timeout (3.0–5.75ms with 1500pF), 1.6µA typical quiescent current, and guaranteed operation down to VCC = 1V. It is used in battery-powered controllers and portable medical instruments requiring precise, low-power reset control.
For engineers reviewing the MAX6422XS26+T datasheet, MAX6422XS26+T pinout, MAX6422XS26+T application, or MAX6422XS26+T equivalent, key selection criteria include its active-high push-pull output, SC70-4 package, ±2.5% reset threshold accuracy over –40°C to +125°C, and immunity to sub-50µs VCC transients at 100mV overdrive.
Technical Context
The MAX6422XS26+T implements a precision voltage detector with laser-trimmed internal resistors defining a nominal 2.625V reset threshold (suffix "26"), with hysteresis of 4×VTH (≈10.5mV). Its SRT pin sources a stable 240nA ramp current to charge an external capacitor, generating a reset timeout period governed by tRP = 2.73×10⁶ × CSRT + 275µs.
Unlike open-drain variants, the MAX6422XS26+T drives RESET high actively (VOH ≥ 0.8×VCC at ISOURCE = 200µA) and low actively (VOL ≤ 0.4V at ISINK = 3.2mA), eliminating need for external pull-ups. It operates across full industrial temperature range (–40°C to +125°C) with supply voltage range 1.0V to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.625V nominal (2.559V–2.691V), enabling reliable detection of 2.6V system rail brownout |
| Quiescent Current | 1.6µA typical at VCC ≤ 2.0V, supporting multi-year battery life in portable devices |
| Reset Timeout Range | 0.275ms (CSRT = 0) to 5.75ms (CSRT = 1500pF), configurable for µP startup timing compliance |
| Output Type | Active-high push-pull, directly driving CMOS inputs without external components |
| Operating Temp | –40°C to +125°C, qualified for automotive under-hood and industrial embedded use |
| VCC Validity | RESET remains valid down to VCC = 1V, ensuring deterministic behavior during deep undervoltage |
| Transient Immunity | Immune to VCC glitches ≤ 50µs duration when falling 100mV below threshold |
Pinout & Package
The MAX6422XS26+T is housed in a 4-pin SC70-4 package (package code X4+1, outline 21-0098), measuring 1.25mm × 0.85mm × 0.55mm, suitable for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply and threshold monitor input | Primary power rail connection; internal voltage divider references this node for reset decision |
| 2 (GND) | Ground reference | Analog and digital ground return path; must be low-impedance for accurate threshold sensing |
| 3 (RESET) | Active-high push-pull reset output | Drives µP reset pin high during normal operation; pulls low only during reset assertion |
| 4 (SRT) | Reset timeout capacitor input | Sources 240nA current to external capacitor; determines reset deassertion delay timing |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed reset threshold | ±1.5% accuracy at +25°C, ±2.5% over full temperature range, reducing calibration overhead |
| Capacitor-adjustable timeout | Enables precise matching to µP's required reset hold time without firmware changes |
| Ultra-low ICC | 1.6µA typical at 2.0V ensures minimal impact on battery runtime in always-on monitoring |
| Push-pull RESET output | Eliminates external pull-up resistor, simplifying BOM and layout for single-supply systems |
| VCC = 1V operation guarantee | Ensures predictable reset state even during severe brownout, preventing runaway µP execution |
Applications
| Portable Medical Monitors | Battery-Powered Industrial Controllers |
|---|---|
Use Scenario: Continuous ECG or glucose meter operation powered by coin-cell batteries. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and triggers controlled µP reset upon voltage sag below 2.625V. Use Value: 1.6µA quiescent current extends battery life beyond 5 years; active-high output directly interfaces with µP reset pin without level-shifting. | Use Scenario: Remote sensor node in oil-field telemetry, operating unattended for months. IC Role / Device Role / Timing Role: Monitors Li-ion battery output (2.8V–4.2V) and asserts reset if voltage drops below 2.625V during cold start. Use Value: –40°C to +125°C rating ensures reliability in extreme ambient; 50µs transient immunity prevents false resets from motor switching noise. |
| Automotive Body Control Modules | Handheld Test Equipment |
Use Scenario: Dashboard cluster module subjected to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Provides fail-safe reset supervision for ARM-based MCU during 12V battery dips to 6V. Use Value: Valid operation down to VCC = 1V ensures reset assertion remains active until supply recovers sufficiently for safe MCU boot. | Use Scenario: Portable oscilloscope with FPGA-based acquisition engine and rechargeable battery pack. IC Role / Device Role / Timing Role: Guarantees clean FPGA configuration after power-on by holding reset for ≥4ms via 1500pF SRT capacitor. Use Value: Adjustable timeout eliminates need for custom firmware delays; SC70-4 footprint saves board area in compact handheld enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6421XS26+T | Active-low push-pull RESET output; identical threshold, timing, and package | Requires inverted logic interface on µP reset pin; no external pull-up needed | Select when target µP accepts active-low reset and board layout already accommodates polarity |
| TLV803EB26DBZR | Fixed 2.63V threshold, 200ms min timeout (non-adjustable), SOT-23-3 package, 0.5µA ICC | Lacks capacitor-adjustable delay; smaller footprint but no timing flexibility | Choose for ultra-low-power, cost-sensitive designs where fixed long timeout suffices |
Compared with MAX6421XS26+T, the MAX6422XS26+T avoids logic inversion requirements; compared with TLV803EB26DBZR, it offers precise timeout tuning and higher drive strength, at the cost of one extra pin and slightly higher ICC.
Availability
The MAX6422XS26+T is available at Aetrix Electronics and suitable for portable medical monitors, battery-powered industrial controllers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6422XS26+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 MAX6422XS26+T belongs to the MAX6340/MAX6421–MAX6426 family of low-power µP supervisors, designed specifically for reliable, low-quiescent-current reset generation in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6422XS26+T?
The MAX6422XS26+T has a factory-laser-trimmed nominal reset threshold of 2.625V, with guaranteed limits of 2.559V (min) and 2.691V (max) at +25°C. Over the full –40°C to +125°C operating range, the threshold varies within ±2.5% of nominal, maintaining robust brownout detection for 2.6V rails. This value is confirmed in Table 1 of the official Analog Devices datasheet (Rev 11, 9/24).
Does the MAX6422XS26+T require an external pull-up resistor on the RESET pin?
No, the MAX6422XS26+T does not require an external pull-up resistor because it features an active-high push-pull RESET output. The device actively drives the RESET pin high during normal operation and pulls it low during reset assertion. This eliminates external components, reduces BOM count, and ensures fast, rail-to-rail logic transitions - a key differentiator from open-drain variants like the MAX6423XS26+T.
How is the reset timeout period set for the MAX6422XS26+T?
The reset timeout period for the MAX6422XS26+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 in farads. For example, a 1500pF capacitor yields 3.0–5.75ms timeout. Ceramic capacitors with leakage <10nA are recommended to maintain accuracy, as specified in the Analog Devices datasheet.
What package type and dimensions does the MAX6422XS26+T use?
The MAX6422XS26+T uses a 4-pin SC70-4 package (Analog Devices package code X4+1, outline 21-0098), measuring 1.25mm × 0.85mm × 0.55mm. It is RoHS-compliant and supplied in tape-and-reel format. This ultra-small footprint enables high-density placement in portable and wearable electronics where board space is at a premium - a critical advantage over larger SOT-23 alternatives.
Is the MAX6422XS26+T suitable for automotive applications?
Yes, the MAX6422XS26+T is rated for operation from –40°C to +125°C and is designed for automotive subsystems such as body control modules and infotainment power management. While the specific variant MAX6422XS26+T is not individually AEC-Q100 certified, it shares architecture and process (BiCMOS) with AEC-Q100-qualified members of the same family (e.g., MAX6340UK31/V+T), and its electrical specifications meet automotive environmental stress requirements per the datasheet.
MAX6422XS26+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- 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
MAX6422XS26+T FAQ
1.How can I place an order for MAX6422XS26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6422XS26+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 MAX6422XS26+T reliable?
The price and inventory of MAX6422XS26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6422XS26+T is usually 5 days.
3.What payment methods are accepted for MAX6422XS26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6422XS26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6422XS26+T?
MAX6422XS26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6422XS26+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 MAX6422XS26+T?
For technical support, including MAX6422XS26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6422XS26+T requirements.
6.How does Aetrix verify that MAX6422XS26+T is sourced from the original manufacturer or authorized distributors?
All MAX6422XS26+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 MAX6422XS26+T meets industry standards.
7.What is the process for return or replacement of MAX6422XS26+T?
All MAX6422XS26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6422XS26+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 MAX6422XS26+T part is unused and in its original packaging.
Return procedure for MAX6422XS26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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