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Analog Devices Inc./Maxim Integrated MAX6340UK16+T
- Part No.:
- MAX6340UK16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6340UK16+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
The MAX6340UK16+T from Analog Devices is a low-power microprocessor supervisor IC with open-drain active-low reset output, 1.575V nominal reset threshold (±2.5% over temperature), capacitor-adjustable reset timeout (275µs to 5.75ms), and guaranteed operation down to VCC = 1V. It monitors supply voltage in battery-powered embedded systems and asserts reset during brownout or power-up sequencing.
For engineers reviewing the MAX6340UK16+T datasheet, MAX6340UK16+T pinout, MAX6340UK16+T application, or MAX6340UK16+T equivalent, key selection criteria include its SOT23-5 open-drain reset architecture, 1.6µA typical quiescent current, -40°C to +125°C operating range, and compatibility with external pullup voltages up to 5.5V.
Technical Context
The MAX6340UK16+T implements a precision voltage detector with laser-trimmed internal resistors to set the 1.575V reset threshold, coupled with a 240nA current source that charges an external capacitor on the SRT pin to generate the programmable reset timeout delay. Its open-drain RESET output requires an external pullup resistor and remains valid for VCC ≥ 1V.
It features immunity to short VCC transients (e.g., ≤50µs for 100mV overdrive), guaranteed reset assertion for VCC falling below threshold, and deassertion only after both VCC exceeds threshold and the SRT capacitor ramps to 0.65V - ensuring robust power-on reset timing without false triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V nominal (1.536V–1.614V at +25°C; ±2.5% over -40°C to +125°C) - sets precise brownout detection point |
| Quiescent Current | 1.6µA typical at VCC ≤ 2.0V - enables multi-year battery life in portable equipment |
| Reset Timeout Range | 275µs (CSRT = 0) to 5.75ms (CSRT = 1500pF) - adjustable via external capacitor for µP startup timing compliance |
| Operating Voltage | 1.0V to 5.5V - supports wide input range including single-cell Li-ion and 3.3V/5V logic rails |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and level-shifting with external pullup (0–5.5V) |
| Temperature Range | -40°C to +125°C - qualified for automotive and industrial environments |
| VCC to Reset Delay | 80µs (VCC falling at 1mV/µs) - ensures fast response to supply collapse |
Pinout & Package
MAX6340UK16+T is housed in a 5-pin SOT23-5 package (package code U5+2, outline 21-0057), with exposed pad not electrically connected. The package supports reflow soldering per JEDEC J-STD-020 and has 0.95mm pitch, 2.9mm × 1.6mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and SRT ramp current sink |
| 2 | VCC | Supply voltage input and monitored rail; powers device and defines reset threshold reference |
| 3 | SRT | Set Reset Timeout input; connects to external capacitor to program tRP via 240nA constant-current ramp |
| 4 | N.C. | No internal connection; must be left unconnected or tied to GND per layout guidance |
| 5 | RESET | Active-low open-drain output; sinks current when asserted; requires external pullup for logic-high state |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise µP reset hold time tuning across applications using one standard part and a single capacitor |
| Open-drain RESET with 0–5.5V pullup compatibility | Permits interface to µPs with different I/O voltage domains (e.g., 1.8V core + 3.3V I/O) without level translators |
| Guaranteed reset validity down to VCC = 1V | Ensures reliable reset assertion even during deep brownout conditions before system shutdown |
| Immunity to short VCC transients | Rejects glitches ≤50µs duration at 100mV overdrive, preventing spurious resets in noisy power environments |
| Laser-trimmed reset threshold accuracy | Delivers ±1.5% tolerance at +25°C and ±2.5% over full temperature range - eliminates need for external calibration |
Applications
| Battery-Powered Portable Equipment | Automotive Body Control Module |
|---|---|
Use Scenario: Power management in handheld medical monitors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Supervises main supply rail and generates clean, timed reset pulse to initialize MCU upon wake-up or battery insertion. Use Value: 1.6µA quiescent current extends battery life; open-drain output interfaces directly to 3.3V MCU reset pin with 10kΩ pullup. | Use Scenario: Monitoring 12V-derived 5V rail in door module ECUs subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Detects undervoltage on microcontroller supply and holds system in reset until stable, with immunity to <50µs supply dips. Use Value: -40°C to +125°C rating and AEC-Q100-aligned design (per MAX6340UK31/V+T variant) support under-hood reliability requirements. |
| Industrial Sensor Node | Medical Infusion Pump Controller |
Use Scenario: Low-power wireless sensor node with intermittent wake-up cycles and strict energy budget. IC Role / Device Role / Timing Role: Ensures deterministic MCU boot after power restoration by asserting reset for ≥4ms (configured via 1nF SRT cap). Use Value: Capacitor-programmable timeout avoids firmware delays; 1.575V threshold matches low-voltage LDO output for early brownout detection. | Use Scenario: Safety-critical infusion pump controller requiring fail-safe power-on initialization and brownout recovery. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply and guarantees reset assertion for minimum 3ms after VCC rises above 1.575V. Use Value: Guaranteed reset validity down to VCC = 1V prevents undefined MCU state during gradual power collapse; open-drain output enables redundant reset injection from safety monitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP3470ASX-16C | Pin-compatible 5-pin SOT23 open-drain supervisor with 1.6V reset threshold; 2.5µA max ICC; no SRT capacitor adjustment - fixed 200ms timeout | Lacks programmable timeout; suitable only where fixed delay suffices and higher ICC is acceptable | Select LP3470ASX-16C only if fixed timeout meets µP requirements and board space allows same footprint |
| NCP302LSN16T1G | 3-pin SOT23-3 open-drain supervisor; 1.6V threshold; fixed 140ms timeout; 0.8µA max ICC; no SRT pin or adjustable delay | Smaller package but no timeout adjustment; lower ICC trade-off for inflexibility | Choose NCP302LSN16T1G for ultra-low-power, space-constrained designs where fixed delay is acceptable |
Compared with LP3470ASX-16C and NCP302LSN16T1G, the MAX6340UK16+T uniquely provides capacitor-adjustable reset timeout in a 5-pin SOT23 package while maintaining sub-2µA quiescent current - enabling precise timing control without firmware overhead or additional components.
Availability
MAX6340UK16+T is available at Aetrix Electronics and suitable for battery-powered portable equipment, automotive body electronics, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6340UK16+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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6340 series belongs to Analog Devices' microprocessor supervisor product line, designed specifically for reliable power-on reset and brownout protection in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6340UK16+T?
The MAX6340UK16+T has a nominal reset threshold of 1.575V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full -40°C to +125°C operating range (1.536V to 1.614V at +25°C). This value is laser-trimmed at wafer test and applies specifically to the "16" suffix variant, as defined in Table 1 of the datasheet.
How do I calculate the external capacitor value for a desired reset timeout on the MAX6340UK16+T?
Use the formula CSRT = (tRP − 275µs) / 2.735 × 10⁶, where tRP is the desired timeout in seconds and CSRT is in farads. For example, a 4ms timeout requires CSRT ≈ 1460pF. The MAX6340UK16+T's 240nA SRT current source charges this capacitor to 0.65V to terminate reset; ceramic capacitors with leakage <10nA are recommended.
Can the MAX6340UK16+T drive a reset input directly without an external pullup resistor?
No - the MAX6340UK16+T features an open-drain RESET output and requires an external pullup resistor to establish a valid logic-high level. A 10kΩ to 100kΩ resistor to any supply between 0V and 5.5V is recommended. Without it, RESET remains floating when deasserted, risking undefined MCU behavior.
Is the MAX6340UK16+T qualified for automotive applications?
The MAX6340UK16+T itself is not AEC-Q100 qualified; however, the related MAX6340UK31/V+T variant is explicitly AEC-Q100 qualified. Both share identical pinout, electrical specs, and SOT23-5 packaging, but automotive qualification requires validation of the specific /V+T suffix version per the datasheet's ordering information table.
What is the maximum allowable voltage on the SRT pin of the MAX6340UK16+T?
The SRT pin of the MAX6340UK16+T must remain within -0.3V to (VCC + 0.3V) per absolute maximum ratings. Since SRT is driven by a 240nA current source into an external capacitor to ground, it should never be externally biased - traces must be short and isolated from noise sources to avoid timeout inaccuracy caused by stray capacitance or leakage.
MAX6340UK16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6340UK16+T FAQ
1.How can I place an order for MAX6340UK16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6340UK16+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 MAX6340UK16+T reliable?
The price and inventory of MAX6340UK16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6340UK16+T is usually 5 days.
3.What payment methods are accepted for MAX6340UK16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6340UK16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6340UK16+T?
MAX6340UK16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6340UK16+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 MAX6340UK16+T?
For technical support, including MAX6340UK16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6340UK16+T requirements.
6.How does Aetrix verify that MAX6340UK16+T is sourced from the original manufacturer or authorized distributors?
All MAX6340UK16+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 MAX6340UK16+T meets industry standards.
7.What is the process for return or replacement of MAX6340UK16+T?
All MAX6340UK16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6340UK16+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 MAX6340UK16+T part is unused and in its original packaging.
Return procedure for MAX6340UK16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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