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Analog Devices Inc./Maxim Integrated MAX6419UK29
- Part No.:
- MAX6419UK29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK29.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,664
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Product details
Overview
MAX6419UK29 from Maxim Integrated is an active-high, push-pull microprocessor supervisor IC designed for dual-voltage system monitoring. It features a factory-trimmed VCC reset threshold of 2.925V (±2.5%), an adjustable RESET IN input with 1.255V threshold, capacitor-adjustable reset timeout (275µs to >100ms), and operates across -40°C to +125°C. It is used in automotive ECUs to ensure reliable µP reset during cold-crank brownout events.
For engineers reviewing the MAX6419UK29 datasheet, MAX6419UK29 pinout, MAX6419UK29 application, or MAX6419UK29 equivalent, key selection criteria include its dual-threshold architecture, guaranteed reset validity down to VCC = 1V, 1.7µA quiescent current, and SOT23-5 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6419UK29 integrates two independent voltage monitoring paths: a laser-trimmed internal comparator for VCC (2.925V nominal) and an external resistor-divider–based comparator for RESET IN (1.255V threshold). Reset assertion occurs if either voltage falls below its respective threshold or manual reset is triggered - though MAX6419 lacks MR pin per selector guide.
Its reset timeout is set by an external capacitor on SRT pin, where a 240nA ramp current charges CSRT to 0.65V; deassertion occurs after reaching that reference. The active-high push-pull RESET output drives high with VOH ≥ 0.8×VCC at ISOURCE = 800µA and remains valid for VCC ≥ 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V ±2.5% - factory-laser-trimmed for stable brownout detection without external components |
| RESET IN Threshold | 1.255V (typ) - enables monitoring of secondary supply (e.g., 1.8V I/O rail) via external resistor divider |
| Reset Timeout Range | 275µs to >100ms - externally adjustable via capacitor on SRT pin; supports diverse µP reset timing requirements |
| Quiescent Current | 1.7µA (typ) - enables always-on supervision in battery-backed systems without significant drain |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up; drives directly into µP reset pin with defined logic levels |
| VCC Validity Limit | Guaranteed RESET validity down to VCC = 1.0V - ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
SOT23-5 package: ultra-compact 2.9mm × 1.6mm footprint with 0.95mm pitch, optimized for high-density PCB layouts in automotive and portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull output | Drives µP reset pin high during fault; sinks 3.2mA at VOL ≤ 0.4V (VCC ≥ 4.5V) |
| 2 - GND | Ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - RESET IN | Adjustable threshold input | High-impedance node (10nA leakage) for external voltage divider; sets secondary monitor point ≥1.26V |
| 4 - SRT | Reset timeout capacitor interface | 240nA precision current source; connects to ground via low-leakage ceramic capacitor (CSRT) |
| 5 - VCC | Supply and primary monitor input | Powers device and feeds internal 2.925V threshold comparator; functional from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors main supply (2.925V) and auxiliary rail (via RESET IN) - eliminates need for two discrete supervisors |
| Capacitor-programmable timeout | Enables precise reset hold time tuning (275µs minimum) without firmware or additional logic |
| Low-power operation | 1.7µA typical ICC allows continuous supervision in energy-sensitive applications like telematics modules |
| High-temp reliability | Specified over -40°C to +125°C with guaranteed performance - suitable for engine control and ADAS subsystems |
| Power transient immunity | Rejects VCC glitches ≤50µs when 100mV below threshold - prevents spurious resets during load dump or cranking |
Applications
| Automotive Engine Control Unit | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V MCU supply and 1.8V sensor interface rail during cold-crank (battery dip to 6V). IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET until both rails stabilize above thresholds and timeout expires. Use Value: Prevents MCU lockup during voltage sag by guaranteeing reset pulse width ≥200ms, aligned with ISO 16750-2 crank profile. | Use Scenario: Ensures safe restart of ARM-based controller after power interruption in battery-operated infusion delivery system. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and backup 1.2V real-time clock rail; asserts RESET until both recover and timeout completes. Use Value: Eliminates risk of partial state corruption by enforcing full hardware reset before re-enabling motor drivers and safety valves. |
| Industrial PLC I/O Module | Portable Test Equipment |
Use Scenario: Detects undervoltage on isolated 5V fieldbus supply and 3.3V logic rail in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Provides coordinated reset signaling to FPGA and communication ASIC using single active-high push-pull output. Use Value: Reduces BOM count by replacing two discrete supervisors; SOT23-5 footprint saves >2mm² PCB area per channel. | Use Scenario: Maintains deterministic boot sequence in handheld oscilloscope during Li-ion battery discharge from 4.2V to 3.0V. IC Role / Device Role / Timing Role: Monitors main 3.3V rail (2.925V threshold) and analog front-end 2.5V reference (via RESET IN) to prevent ADC initialization errors. Use Value: Enables reliable measurement integrity by holding µP in reset until both critical supplies meet accuracy and stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK29-T | Same dual-threshold architecture and 2.925V VCC threshold, but features open-drain RESET output instead of push-pull | Requires external pull-up for logic-high assertion; better suited for level-shifting or wired-OR configurations | Select MAX6420UK29-T only if system requires open-drain flexibility or shares RESET bus with other devices |
| TLV809E29DBVR | Single-threshold (2.93V), no adjustable input, no manual reset, fixed 200ms timeout, lower IQ (0.5µA), same SOT23-5 package | Lacks dual-supply monitoring capability; limited to basic VCC-only supervision in cost-sensitive consumer designs | Choose TLV809E29DBVR only for single-rail applications where RESET IN functionality is unnecessary and lowest possible quiescent current is critical |
Compared with MAX6419UK29, MAX6420UK29-T trades push-pull drive strength for open-drain versatility, while TLV809E29DBVR sacrifices dual-monitoring and timeout adjustability to achieve sub-1µA quiescent current - making MAX6419UK29 the optimal choice for robust dual-rail automotive and industrial supervision.
Availability
MAX6419UK29 is available at Aetrix Electronics and suitable for automotive engine control, medical infusion pumps, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK29 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for demanding industrial, automotive, and communications applications.
The MAX6412–MAX6420 product line delivers low-power, configurable µP supervisors with dual-threshold monitoring and capacitor-adjustable reset timing - engineered specifically for reliability-critical embedded systems operating in harsh thermal and electrical environments.
FAQ
What is the exact factory-set VCC reset threshold voltage for MAX6419UK29?
The MAX6419UK29 has a factory-laser-trimmed VCC reset threshold of 2.925V (typical), with tolerance of ±2.5% over -40°C to +125°C. This value corresponds to suffix "29" per Table 1 in the datasheet and is verified in the Electrical Characteristics table under VTH parameter. The MAX6419UK29 uses this fixed threshold to supervise the primary supply while simultaneously monitoring a secondary rail via its RESET IN pin.
Does MAX6419UK29 include a manual reset (MR) input?
No, the MAX6419UK29 does not include a manual reset (MR) input. According to the Selector Guide and Pin Configuration table, MAX6419 belongs to the MAX6418/MAX6419/MAX6420 group, which features dual-voltage monitoring (fixed VCC + adjustable RESET IN) but omits the MR pin. Pins are strictly RESET, GND, RESET IN, SRT, and VCC - confirmed by top-marking data and functional grouping in the datasheet.
How is the reset timeout period calculated for MAX6419UK29?
The reset timeout period tRP for MAX6419UK29 is calculated using tRP = (2.73 × 10⁶) × CSRT + 275µs, where CSRT is the capacitor value in farads. For example, a 1500pF capacitor yields ~4.375ms timeout. This relationship is derived from the 240nA internal ramp current charging CSRT to the 0.65V internal reference. The MAX6419UK29 datasheet specifies this formula in the Pin Description and Application Information sections.
What is the function of the RESET IN pin on MAX6419UK29?
The RESET IN pin on MAX6419UK29 is a high-impedance input (10nA leakage) to an internal comparator with a fixed 1.255V threshold. It is intended to monitor a secondary voltage rail (e.g., 1.8V or 2.5V) using an external resistor divider. The monitored voltage VMON_TH is calculated as VMON_TH = 1.255V × (R1 + R2)/R2. This enables true dual-supply supervision within a single SOT23-5 package - a core feature distinguishing MAX6419UK29 from single-threshold supervisors.
Can MAX6419UK29 operate reliably at VCC = 1.0V?
Yes, MAX6419UK29 guarantees valid RESET output behavior down to VCC = 1.0V, as explicitly stated in the datasheet's "Guaranteed Reset Valid to VCC = 1V" feature and confirmed in the Electrical Characteristics table. At VCC = 1.0V, the active-high RESET output maintains VOH ≥ 0.8×VCC with 200µA source capability and VOL ≤ 0.3V with 500µA sink capability - ensuring interoperability with low-voltage µPs during deep brownout recovery. This specification applies directly to MAX6419UK29 and is not extrapolated.
MAX6419UK29 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.925V, Adj
- 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:
- SOT-23-5
MAX6419UK29 FAQ
1.How can I place an order for MAX6419UK29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK29 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 MAX6419UK29 reliable?
The price and inventory of MAX6419UK29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK29 is usually 5 days.
3.What payment methods are accepted for MAX6419UK29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK29?
MAX6419UK29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK29 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 MAX6419UK29?
For technical support, including MAX6419UK29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK29 requirements.
6.How does Aetrix verify that MAX6419UK29 is sourced from the original manufacturer or authorized distributors?
All MAX6419UK29 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 MAX6419UK29 meets industry standards.
7.What is the process for return or replacement of MAX6419UK29?
All MAX6419UK29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK29, 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 MAX6419UK29 part is unused and in its original packaging.
Return procedure for MAX6419UK29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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