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Analog Devices Inc./Maxim Integrated MAX6366PKA46
- Part No.:
- MAX6366PKA46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6366PKA46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,561
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Product details
Overview
MAX6366PKA46 from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated watchdog timer, battery backup switchover, and chip-enable gating. It monitors +4.63V supply (±13mV threshold accuracy), asserts active-high open-drain RESET on VCC brownout or watchdog timeout, and supports 1.2V–5.5V operation with 10µA quiescent current. Used in portable POS terminals to maintain SRAM data during main power failure.
For engineers reviewing the MAX6366PKA46 datasheet, MAX6366PKA46 pinout, MAX6366PKA46 application, or MAX6366PKA46 equivalent, key selection criteria include its 1.6s watchdog timeout, 4.63V factory-set reset threshold, 150ms minimum reset timeout, open-drain active-high RESET output, and SOT23-8 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6366PKA46 implements a precision voltage monitor with 4.63V ±13mV threshold and internal 1.235V reference for secondary monitoring. Its watchdog timer triggers a 150–280ms RESET pulse when WDI remains static beyond 1.00–2.25s, with edge-triggered clearing on rising/falling transitions.
It integrates bidirectional VCC/BATT switchover using MOSFET-based switching with 40mV hysteresis and 1.5ns CE IN-to-CE OUT propagation delay. The device guarantees RESET/RESET validity down to 1.2V on either VCC or VBATT, enabling reliable operation during deep brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±13mV - ensures precise detection of +5V rail collapse before system instability |
| Watchdog Timeout | 1.6s typical - provides robust software hang detection without false triggering |
| Reset Timeout Period | 150ms minimum - guarantees µP initialization completes before release |
| Supply Current | 10µA typical at VCC = 5.5V - enables multi-year battery life in backup mode |
| Operating Voltage | 1.2V to 5.5V - supports direct interface with 1.2V logic and legacy 5V systems |
| Output Type | Open-drain active-high RESET - allows wired-OR configuration and level-shifting flexibility |
| Package | SOT23-8 - 2.9mm × 1.6mm footprint ideal for handheld and IoT edge devices |
Pinout & Package
MAX6366PKA46 uses an 8-pin SOT23-8 package with exposed pad (no thermal pad specified). Pin 1 is RESET (active-high open-drain), Pin 2 is CE IN, Pin 3 is GND, Pin 4 is WDI, Pin 5 is VCC, Pin 6 is OUT, Pin 7 is BATT, Pin 8 is CE OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high open-drain reset output | Asserts high during VCC brownout or watchdog timeout; requires external pull-down for logic-low default state |
| 2 - CE IN | Chip-enable input | Controls gating of CE signal to SRAM; low disables write path during reset to prevent corruption |
| 3 - GND | Ground reference | Common return for all analog and digital functions; must be low-impedance connection |
| 4 - WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets internal 1.6s timer; left floating to disable watchdog |
| 5 - VCC | Main supply input | Primary power source (1.2–5.5V); monitored for 4.63V threshold violation |
| 6 - OUT | Power output | Switches between VCC and BATT sources; delivers up to 150mA from VCC or 10mA from battery |
| 7 - BATT | Battery backup input | Backup source (≥2.25V); activates when VCC falls 20mV below VBATT |
| 8 - CE OUT | Chip-enable output | Passes CE IN signal during normal operation; held low for 12µs after reset assertion to complete memory access |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog timer | 1.6s timeout with edge-triggered reset - eliminates need for external timing components and reduces firmware overhead |
| VCC/BATT switchover | 40mV hysteresis and <1.5ns CE propagation - prevents oscillation during slow VCC decay and preserves SRAM integrity |
| Chip-enable gating | 12µs guaranteed hold time on CE OUT - ensures completion of final memory read/write before reset assertion |
| Low-voltage operation | 1.2V guaranteed RESET/RESET validity - enables use with ultra-low-power MCUs and battery-depleted states |
| Reset threshold accuracy | ±13mV over -40°C to +85°C - eliminates need for external resistor divider calibration in production |
Applications
| POS Terminal Power Management | Industrial Data Logger |
|---|---|
Use Scenario: Maintains SRAM contents during AC power loss in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory controller providing VCC brownout detection, battery switchover, and watchdog supervision. Use Value: Prevents transaction data loss by asserting RESET only after stable battery power is established and holding CE OUT low for 12µs to complete last write cycle. | Use Scenario: Ensures nonvolatile memory integrity in remote environmental sensors operating on lithium primary cells. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year battery life while guaranteeing safe shutdown on voltage sag. Use Value: 10µA ICC and 3µA IBACK extend operational lifetime; 4.63V threshold matches nominal 5V sensor rail tolerance. |
| Medical Infusion Pump Controller | Set-Top Box Firmware Recovery |
Use Scenario: Safeguards real-time clock and therapy parameters during mains interruption in Class II medical devices. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 5V rail and provides watchdog oversight of safety-critical MCU firmware. Use Value: Independent 1.235V reference (via unused pins) allows secondary undervoltage detection; RESET assertion prevents unsafe actuator activation. | Use Scenario: Recovers corrupted firmware after power glitch in consumer entertainment devices. IC Role / Device Role / Timing Role: Watchdog-enforced reset generator ensuring bootloader execution after unexpected reset. Use Value: 1.6s watchdog timeout aligns with typical firmware boot sequence; open-drain RESET allows shared reset bus with other peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6366HKA46 | Same 4.63V threshold and watchdog, but push-pull active-high RESET output | Requires no external pull-down; unsuitable for wired-OR reset buses | Select when board-level reset net uses single-source active-high signaling without sharing |
| TPS3808G33 | 3.3V fixed threshold, no watchdog, 350ms reset timeout, SOT23-6 package | Lacks battery switchover and CE gating; supports only basic power monitoring | Select only for cost-sensitive, non-battery-backed applications where watchdog and memory protection are unnecessary |
Compared with MAX6366HKA46 and TPS3808G33, the MAX6366PKA46 uniquely combines 4.63V precision monitoring, 1.6s watchdog, open-drain RESET, and chip-enable gating in an 8-pin SOT23-enabling compact, fail-safe memory retention in portable equipment where layout area and functional integration are critical.
Availability
MAX6366PKA46 is available at Aetrix Electronics and suitable for POS terminals, industrial data loggers, medical infusion pumps, and set-top boxes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6366PKA46 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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6365–MAX6368 family was engineered specifically for space-constrained µP systems needing integrated power monitoring, battery backup, and memory write protection-replacing discrete solutions with a single 8-pin SOT23 device.
FAQ
What is the exact reset threshold voltage for MAX6366PKA46?
The MAX6366PKA46 has a factory-trimmed reset threshold of 4.63V with ±13mV tolerance over the full -40°C to +85°C temperature range. This value is confirmed in the Reset Threshold Ranges table and Electrical Characteristics section of the official datasheet, and applies to VCC falling conditions with 20µs typical delay.
Does MAX6366PKA46 support battery backup functionality?
Yes, MAX6366PKA46 fully supports battery backup. When VCC drops below the 4.63V threshold and falls 20mV below VBATT, the internal MOSFET switches OUT from VCC to BATT. The device guarantees RESET/RESET validity down to 1.2V on either supply, and draws only 3µA from the battery in backup mode per datasheet specifications.
What is the watchdog timeout behavior of MAX6366PKA46?
The MAX6366PKA46 watchdog timer has a nominal 1.6s timeout (1.00–2.25s min/max range). It triggers a 150–280ms active-high RESET pulse if WDI remains static; any rising or falling edge on WDI clears the timer. The WDI pin is internally biased and can be left floating to disable the function without external components.
How does the chip-enable gating work on MAX6366PKA46?
On MAX6366PKA46, CE IN connects to CE OUT via a low-on-resistance transmission gate during normal operation. When RESET asserts, CE OUT is held low for 12µs (typical) to complete pending memory access, then actively pulled high to OUT. Propagation delay is 1.5ns typical with 50Ω source and 50pF load, as verified in the datasheet's timing diagrams.
What package type and pin count does MAX6366PKA46 use?
MAX6366PKA46 uses an 8-pin SOT23-8 package (2.9mm × 1.6mm body size, 0.95mm height), with pin 1 marked by a dot. Pinout is identical across the MAX6365–MAX6368 family: RESET, CE IN, GND, WDI, VCC, OUT, BATT, CE OUT - confirmed in the Pin Configurations diagram and Pin Description table.
MAX6366PKA46 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6366PKA46 FAQ
1.How can I place an order for MAX6366PKA46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6366PKA46 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 MAX6366PKA46 reliable?
The price and inventory of MAX6366PKA46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6366PKA46 is usually 5 days.
3.What payment methods are accepted for MAX6366PKA46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6366PKA46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6366PKA46?
MAX6366PKA46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6366PKA46 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 MAX6366PKA46?
For technical support, including MAX6366PKA46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6366PKA46 requirements.
6.How does Aetrix verify that MAX6366PKA46 is sourced from the original manufacturer or authorized distributors?
All MAX6366PKA46 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 MAX6366PKA46 meets industry standards.
7.What is the process for return or replacement of MAX6366PKA46?
All MAX6366PKA46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6366PKA46, 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 MAX6366PKA46 part is unused and in its original packaging.
Return procedure for MAX6366PKA46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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