My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6366PKA46+T
- Part No.:
- MAX6366PKA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6366PKA46+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6366PKA46+T 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 (±130mV threshold accuracy), asserts open-drain active-low RESET for ≥150ms after power recovery, and switches SRAM power from VCC to backup battery during brownout. Used in portable POS terminals and industrial controllers requiring reliable power-fail response.
For engineers reviewing the MAX6366PKA46+T datasheet, MAX6366PKA46+T pinout, MAX6366PKA46+T application, or MAX6366PKA46+T equivalent, key selection criteria include 4.63V reset threshold tolerance, 1.6s watchdog timeout, 10µA quiescent current, SOT23-8 package compatibility, and CE gating propagation delay under 9ns at 50pF load.
Technical Context
The MAX6366PKA46+T implements a precision voltage comparator with 4.63V factory-trimmed threshold (±130mV over -40°C to +85°C), coupled to a monostable reset generator with 150–280ms timeout. Its internal watchdog timer detects µP lockup via WDI edge transitions and triggers pulsed RESET output upon 1.00–2.25s timeout.
Battery switchover uses dual-voltage comparison: VCC must fall below both VTH (4.63V) and VBATT by ≥20mV to engage BATT-to-OUT MOSFET, which exhibits 4.6Ω on-resistance at 2.38V/25mA. Chip-enable gating employs a transmission gate with 20–100Ω on-resistance and 1.5ns propagation delay (typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±130mV - guarantees reliable detection of +5V rail collapse before data corruption occurs |
| Watchdog Timeout | 1.6s typical - provides sufficient margin for µP firmware execution cycles while preventing false triggers |
| Quiescent Current | 10µA max at VCC = 5.5V - enables multi-year operation on coin-cell backup without significant drain |
| RESET Timeout Period | 150ms min - ensures µP completes full power-up initialization before release from reset |
| VCC Operating Range | 1.2V to 5.5V - supports direct interface with 1.2V logic and legacy 5V systems without level shifting |
| CE Propagation Delay | 2–9ns at 50pF load - preserves timing integrity for high-speed µP address/data bus gating |
| Battery Switchover Hysteresis | 40mV - prevents oscillation during slow VCC ramp-down near VBATT voltage |
Pinout & Package
MAX6366PKA46+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm height), RoHS-compliant and lead(Pb)-free per +T suffix. Pin 1 is marked with a dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain active-low reset output | Asserts low during VCC < 4.63V, WDI timeout, or MR low; requires external pullup for system reset signaling |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; held low during reset to prevent write corruption during power failure |
| 3 GND | Ground reference | Common return path for VCC, BATT, and all internal circuitry; must be low-impedance connection |
| 4 WDI | Watchdog input | Edge-sensitive input (rising/falling); resets internal timer on each transition; 100ns minimum pulse width |
| 5 VCC | Main supply input | Powers device and supplies OUT during normal operation; monitored for reset threshold violation |
| 6 OUT | Power output | Sources from VCC when active; switches to BATT during brownout; delivers up to 150mA at VCC = 4.75V |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V backup source; engages only when VCC < VTH and VCC < (VBATT − 20mV) |
| 8 CE OUT | Chip-enable output | Passes CE IN during normal operation; forced low for 12µs after reset assertion to complete pending memory access |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor divider, reducing BOM count and layout area for +5V systems |
| 1.6s watchdog timeout with edge-triggered WDI | Enables robust software hang detection without requiring precise timer polling intervals |
| Integrated VCC-to-BATT switchover MOSFET | Provides seamless RAM backup with <1µA standby current from battery when VCC = 0V |
| 1.5ns CE gating propagation delay | Maintains timing margins for µPs operating above 100MHz with SRAM peripherals |
| Open-drain RESET output | Allows wired-OR configuration with other reset sources and compatibility with diverse µP reset input architectures |
| 10µA supply current at 5.5V | Extends battery life in portable equipment where supervisory IC operates continuously |
Applications
| POS Terminal Power Management | Industrial PLC Memory Protection |
|---|---|
|
Use Scenario: Battery-backed SRAM retention during AC mains interruption in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory controller that monitors 5V rail, asserts RESET to halt µP, gates CE to freeze memory writes, and switches SRAM power to coin-cell backup. Use Value: Prevents transaction data loss during 100ms–2s grid outages using <1µA battery drain in backup mode. |
Use Scenario: Ensuring deterministic reset behavior and nonvolatile memory protection in programmable logic controllers exposed to voltage sags. IC Role / Device Role / Timing Role: Voltage monitor with watchdog that forces controlled reboot on firmware crash and disables peripheral writes during brownout. Use Value: Guarantees 150ms minimum reset hold time and 4.63V threshold accuracy to meet IEC 61000-4-11 immunity requirements. |
| Medical Infusion Pump Safety Monitoring | Smart Meter Data Integrity |
|
Use Scenario: Maintaining real-time clock and therapy parameter storage during primary power failure in Class II medical devices. IC Role / Device Role / Timing Role: Dual-role supervisor providing both power-fail detection and independent watchdog oversight of safety-critical firmware. Use Value: Delivers fail-safe operation with 1.6s watchdog timeout and guaranteed RESET assertion down to 1.2V VCC. |
Use Scenario: Preserving tariff and consumption logs in electricity meters during utility voltage dips or outages. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >10-year coin-cell life while protecting EEPROM writes via CE gating. Use Value: Achieves <10µA total system standby current with 4.63V threshold aligned to meter's 5V DC-DC output specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6366HKA46+T | Push-pull active-high RESET output instead of open-drain active-low; identical threshold, watchdog, and CE functions | Requires no external pullup resistor but incompatible with wired-OR reset buses | Select when system reset logic expects active-high signaling and no shared reset lines exist |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no watchdog or CE gating; 350ms reset timeout; SOT23-6 package | Lacks battery switchover, memory write protection, and µP activity monitoring capability | Choose only for basic 3.3V supply monitoring where advanced features are unnecessary |
Compared with MAX6366PKA46+T, MAX6366HKA46+T offers simplified reset drive but sacrifices bus-sharing flexibility, while TPS3808G33DBVR reduces cost and footprint at the expense of critical reliability features required for battery-backed memory systems.
Availability
MAX6366PKA46+T is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, smart electricity meters, and retail POS terminals requiring stable component supply across extended product lifecycles.
Supply support for MAX6366PKA46+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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and connectivity in demanding environments.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power supervision, battery backup, and memory write protection - specifically engineered for portable, industrial, and medical equipment with strict reliability requirements.
FAQ
What is the exact reset threshold voltage of the MAX6366PKA46+T?
The MAX6366PKA46+T has a factory-trimmed reset threshold of 4.63V, with guaranteed limits of 4.50V (min) and 4.75V (max) over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and does not require external calibration. The MAX6366PKA46+T uses this precise threshold to reliably detect failures in +5V power rails before downstream logic errors occur.
Does the MAX6366PKA46+T support battery backup for SRAM, and how does switchover work?
Yes, the MAX6366PKA46+T provides automatic battery backup for SRAM via its integrated VCC-to-BATT switchover MOSFET. Switchover activates only when two conditions are met simultaneously: VCC falls below 4.63V AND VCC drops at least 20mV below VBATT. This 40mV hysteresis prevents oscillation during slow voltage ramps. The MAX6366PKA46+T maintains SRAM power from the backup source with <1µA quiescent drain when VCC = 0V.
What is the watchdog timeout period of the MAX6366PKA46+T, and how is it triggered?
The MAX6366PKA46+T features a watchdog timer with a nominal timeout period of 1.6s, specified from 1.00s (min) to 2.25s (max) over temperature. It is triggered when the WDI input remains static (high or low) beyond this interval - indicating µP firmware hang. Each rising or falling edge on WDI resets the timer. The MAX6366PKA46+T then asserts a pulsed active-low RESET for ≥150ms to force system recovery.
Can the MAX6366PKA46+T be used without a backup battery?
Yes, the MAX6366PKA46+T operates fully without a backup battery. In this configuration, connect the BATT pin to GND and tie OUT directly to VCC. All supervisory functions - including 4.63V reset monitoring, watchdog timer, and CE gating - remain fully operational. The MAX6366PKA46+T continues to assert RESET during VCC brownout and protect memory writes via CE IN/CE OUT control, making it suitable for cost-sensitive applications where battery backup is optional.
What package type and pin count does the MAX6366PKA46+T use?
The MAX6366PKA46+T is supplied in an 8-pin SOT23 package (JEDEC MO-178AB), measuring 2.9mm × 1.6mm × 1.1mm. It features gull-wing leads compatible with standard reflow soldering processes. The +T suffix confirms lead(Pb)-free construction per RoHS Directive 2011/65/EU. Pin 1 is marked with a dot; the device orientation matches the top-view diagram in the MAX6366PKA46+T datasheet.
MAX6366PKA46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- 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+T FAQ
1.How can I place an order for MAX6366PKA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6366PKA46+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 MAX6366PKA46+T reliable?
The price and inventory of MAX6366PKA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6366PKA46+T is usually 5 days.
3.What payment methods are accepted for MAX6366PKA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6366PKA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6366PKA46+T?
MAX6366PKA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6366PKA46+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 MAX6366PKA46+T?
For technical support, including MAX6366PKA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6366PKA46+T requirements.
6.How does Aetrix verify that MAX6366PKA46+T is sourced from the original manufacturer or authorized distributors?
All MAX6366PKA46+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 MAX6366PKA46+T meets industry standards.
7.What is the process for return or replacement of MAX6366PKA46+T?
All MAX6366PKA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6366PKA46+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 MAX6366PKA46+T part is unused and in its original packaging.
Return procedure for MAX6366PKA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6366PKA46+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
