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Analog Devices Inc./Maxim Integrated MAX6419UK46
- Part No.:
- MAX6419UK46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK46.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
MAX6419UK46 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 4.625V (±2.5%), an adjustable RESET IN input (1.26V threshold), capacitor-programmable reset timeout (275µs to >100ms), 1.7µA typical quiescent current, and guaranteed reset validity down to VCC = 1V. It is used in automotive engine control units to monitor both main 5V logic supply and auxiliary 3.3V I/O rail.
For engineers reviewing the MAX6419UK46 datasheet, MAX6419UK46 pinout, MAX6419UK46 application, or MAX6419UK46 equivalent, key selection considerations include its dual-threshold architecture, SOT23-5 package compatibility, active-high push-pull output drive capability (VOH ≥ 0.8×VCC at 800µA), and temperature-stable reset timeout across –40°C to +125°C.
Technical Context
The MAX6419UK46 integrates two independent voltage-monitoring comparators: one laser-trimmed for fixed VCC supervision at 4.625V, and one with a precise 1.26V internal reference for externally adjustable monitoring via resistor divider. Its reset assertion logic triggers when either input falls below its threshold or manual reset is asserted - though MAX6419 lacks MR pin per selector guide.
Reset deassertion is governed by a 240nA current source charging an external capacitor (CSRT) to a 0.65V ramp threshold; timeout accuracy is ±15% over temperature. The active-high push-pull output drives loads up to 800µA while maintaining VOH ≥ 0.8×VCC and VOL ≤ 0.4V at full spec.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.625V ±2.5% - factory-laser-trimmed for stable 5V rail monitoring without external components |
| RESET IN Threshold | 1.26V ±2.5% - enables adjustable monitoring of secondary rails (e.g., 3.3V via R1/R2 divider) |
| Quiescent Current | 1.7µA typical - supports ultra-low-power battery-backed systems and always-on monitoring |
| Reset Timeout Range | 275µs to >100ms - set externally via CSRT (0–15nF), enabling flexibility across µP reset timing requirements |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive and industrial embedded environments |
| Output Type | Active-high push-pull - eliminates need for external pull-up, delivers clean logic-high signal directly to µP reset input |
| VCC Validity Limit | Guaranteed RESET operation down to VCC = 1V - ensures reliable reset assertion during brownout conditions |
Pinout & Package
SOT23-5 package: compact, surface-mount, thermally enhanced plastic case with 0.95mm pitch; RoHS-compliant lead-free option available (suffix +T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives µP reset pin high after timeout; sinks 3.2mA / sources 800µA; valid for VCC ≥ 1V |
| 2 - GND | Ground reference | Primary return path for all internal circuitry and external capacitor (CSRT) discharge |
| 3 - RESET IN | Adjustable voltage monitor input | High-impedance comparator input referenced to 1.26V; connects to center tap of external resistor divider |
| 4 - SRT | Set Reset Timeout input | 240nA precision current source node; connects to external timing capacitor (CSRT) to ground |
| 5 - VCC | Supply and fixed-threshold monitor input | Powers device and feeds laser-trimmed comparator for 4.625V VCC supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises primary VCC (4.625V) and secondary rail (via RESET IN + external divider) - eliminates need for two discrete supervisors |
| Capacitor-adjustable reset timeout | Timeout programmable from 275µs to >100ms using single external capacitor - supports diverse µP reset timing specs without firmware changes |
| Ultra-low quiescent current | 1.7µA typical ICC - extends battery life in portable/remote sensors and enables always-on fault detection |
| Guaranteed reset validity to VCC = 1V | RESET remains logic-valid even as supply collapses - prevents spurious release during brownout recovery |
| Power-supply transient immunity | Rejects VCC glitches <50µs duration when overdrive is ≤100mV - improves robustness in noisy automotive/industrial power domains |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors both 5V main logic supply and 3.3V analog sensor interface rail in real-time. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET to ARM Cortex-M7 MCU upon any rail undervoltage. Use Value: Prevents corrupted firmware execution during cold-cranking or load-dump transients by holding MCU in reset until both rails stabilize above thresholds. |
Use Scenario: Ensures safe power-up sequencing and brownout recovery for safety-critical drug delivery logic. IC Role / Device Role / Timing Role: Supervises backup coin-cell supply (1.8V) and main 3.3V rail using RESET IN and VCC inputs respectively. Use Value: Guarantees deterministic MCU reset before motor driver activation, meeting IEC 62304 Class C software safety requirements. |
| Industrial PLC I/O Module | Portable Diagnostic Handheld |
Use Scenario: Detects undervoltage on isolated 24V-to-5V DC/DC output and 3.3V FPGA core rail in harsh factory environments. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination between microcontroller and FPGA configuration logic via shared active-high RESET line. Use Value: Eliminates metastability risk during power restoration by enforcing minimum 100ms reset hold time via 10nF CSRT capacitor. |
Use Scenario: Maintains reliable reset behavior across wide battery voltage range (4.2V fresh → 3.0V depleted) while minimizing standby drain. IC Role / Device Role / Timing Role: Uses VCC input for main supply monitoring and RESET IN for battery voltage threshold (set to 3.2V via divider) to trigger graceful shutdown. Use Value: Extends usable battery life by 22% versus fixed-threshold alternatives due to 1.7µA ICC and dual-rail awareness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK46-T | Same VCC threshold (4.625V) and RESET IN, but open-drain RESET output requiring external pull-up | Used where level-shifting or wired-OR reset bus is required; incompatible with direct µP reset pins expecting push-pull drive | Select MAX6420UK46-T only if system requires open-drain reset arbitration or interfacing to non-5V logic domains |
| TPS3808G33DBVR | Fixed 3.3V VCC threshold only; no adjustable RESET IN; 300ms fixed timeout; higher ICC (12µA) | Suitable for single-rail 3.3V systems only; lacks dual-voltage capability and timeout flexibility of MAX6419UK46 | Choose TPS3808G33DBVR only for cost-sensitive, single-supply designs where adjustable timeout and secondary rail monitoring are unnecessary |
Compared with MAX6420UK46-T and TPS3808G33DBVR, the MAX6419UK46 uniquely combines factory-trimmed 4.625V supervision, adjustable secondary-rail monitoring, capacitor-programmable timeout, and active-high push-pull output - making it the only option supporting dual-rail validation with zero external components beyond CSRT.
Availability
MAX6419UK46 is available at Aetrix Electronics and suitable for automotive engine control units, medical infusion pump controllers, industrial PLC I/O modules, portable diagnostic handhelds, and critical microprocessor monitoring applications requiring stable component supply across extended temperature ranges.
Supply support for MAX6419UK46 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 ICs for demanding industrial, automotive, and medical applications.
The MAX6412–MAX6420 product line was engineered specifically for low-power, high-reliability microprocessor supervision in dual-voltage embedded systems - emphasizing precision threshold stability, ultra-low ICC, and flexible timeout programming.
FAQ
What is the exact VCC reset threshold voltage for MAX6419UK46?
The MAX6419UK46 has a factory-laser-trimmed VCC reset threshold of 4.625V, with ±2.5% tolerance over the full –40°C to +125°C temperature range. This value corresponds to suffix "46" per Table 1 in the datasheet and is verified in the Electrical Characteristics table under VTH parameter.
Does MAX6419UK46 include a manual reset (MR) input?
No, the MAX6419UK46 does not include a manual reset (MR) input. Per the Selector Guide and Pin Description tables, only MAX6412/MAX6413/MAX6414 and MAX6418/MAX6419/MAX6420 variants with "UKxx" suffixes omit MR; the MAX6419UK46 uses pins 1–5 exclusively for RESET, GND, RESET IN, SRT, and VCC.
How is the reset timeout period calculated for MAX6419UK46?
The reset timeout period (tRP) for MAX6419UK46 is calculated as tRP = (2.73 × 10⁶) × CSRT + 275µs, where CSRT is the capacitor value in farads. For example, a 10nF capacitor yields tRP ≈ 27.6ms. This relationship is derived from the 240nA internal ramp current charging CSRT to the 0.65V threshold.
What is the function of the RESET IN pin on MAX6419UK46?
The RESET IN pin on MAX6419UK46 is a high-impedance input to an internal comparator referenced to a precise 1.26V threshold. It enables monitoring of a secondary voltage rail (e.g., 3.3V) using an external resistor divider - allowing the MAX6419UK46 to assert reset if either VCC or the divided voltage falls below its respective threshold.
Can MAX6419UK46 operate reliably at VCC = 1.2V?
Yes, the MAX6419UK46 guarantees valid RESET output operation down to VCC = 1V, including proper assertion/deassertion timing and voltage levels (VOH ≥ 0.8×VCC, VOL ≤ 0.4V). At VCC = 1.2V, the active-high RESET output will drive ≥0.96V high and ≤0.4V low under specified load conditions.
MAX6419UK46 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:
- 4.625V, 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
MAX6419UK46 FAQ
1.How can I place an order for MAX6419UK46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK46 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 MAX6419UK46 reliable?
The price and inventory of MAX6419UK46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK46 is usually 5 days.
3.What payment methods are accepted for MAX6419UK46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK46?
MAX6419UK46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK46 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 MAX6419UK46?
For technical support, including MAX6419UK46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK46 requirements.
6.How does Aetrix verify that MAX6419UK46 is sourced from the original manufacturer or authorized distributors?
All MAX6419UK46 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 MAX6419UK46 meets industry standards.
7.What is the process for return or replacement of MAX6419UK46?
All MAX6419UK46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK46, 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 MAX6419UK46 part is unused and in its original packaging.
Return procedure for MAX6419UK46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6419UK46 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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V6340RSP3B+
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EM6325CXSP5B-2.9+
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MCP130T-315I/TT
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MCP120T-475I/TT
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MCP120T-315I/TT
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