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Analog Devices Inc./Maxim Integrated MAX6367PKA31+T
- Part No.:
- MAX6367PKA31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367PKA31+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
MAX6367PKA31+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup control, chip-enable gating, and BATT ON status indicator. It monitors VCC supply (3.08V reset threshold), provides active-high open-drain RESET output, switches OUT between VCC and backup battery during brownout, and asserts BATT ON high in backup mode. Used in portable POS terminals and industrial controllers requiring nonvolatile memory retention during power loss.
For engineers reviewing the MAX6367PKA31+T datasheet, MAX6367PKA31+T pinout, MAX6367PKA31+T application, or MAX6367PKA31+T equivalent, key selection criteria include 3.08V factory-trimmed reset threshold, 150ms minimum reset timeout, battery-switchover hysteresis (±20mV), 10µA quiescent current, and guaranteed RESET/RESET operation down to 1.2V supply.
Technical Context
The MAX6367PKA31+T implements a precision voltage monitor with ±1.5% threshold accuracy over temperature, internal MOSFET-based VCC/BATT switchover logic with 40mV hysteresis, and dedicated push-pull BATT ON output that drives high only when VBATT > VCC and VCC < VTH. Its CE IN–CE OUT transmission gate provides 1.5ns propagation delay and 20Ω on-resistance for SRAM write protection.
Unlike MAX6365/MAX6366 variants, this device omits manual reset input and watchdog timer, instead integrating a dedicated BATT ON output with 60mA sink capability at 0.4V saturation and 10µA source current from OUT in backup mode - enabling direct LED indication or external pass-transistor base drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V to 3.15V (factory-trimmed to 3.08V typical); ensures reliable reset assertion before 3.3V µP brownout. |
| Reset Timeout Period | 150ms minimum; guarantees µP initialization completes before release from reset. |
| VCC Operating Range | 1.2V to 5.5V; supports single-supply operation across 1.8V, 2.5V, 3.3V, and 5V systems. |
| Quiescent Current | 10µA typical at VCC = 5.5V; enables multi-year battery life in backup mode. |
| BATT ON Output | Push-pull, active-high; sinks 60mA at 0.4V (VBATT = 2.1V), sources 10µA from OUT in backup mode. |
| VCC-to-BATT Switchover | Hysteresis ±20mV; prevents oscillation during slow VCC decay near threshold. |
| Chip-Enable Propagation Delay | 1.5ns typical; preserves timing integrity for high-speed µP/SRAM interfaces. |
Pinout & Package
MAX6367PKA31+T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), lead(Pb)-free, RoHS-compliant, with moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC < VTH (3.08V), MR low (not applicable), or BATT ON condition; requires external pull-down for logic-low default. |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low disables write path during reset or power failure. |
| 3 GND | Ground reference | Common return for VCC, BATT, and all internal circuitry; must be low-impedance connection. |
| 4 BATT ON | Battery-backup status indicator | Push-pull output driven high only when VCC < VTH AND VBATT > VCC + 20mV; used for LED or transistor drive. |
| 5 VCC | Main supply input | Primary power source (1.2V–5.5V); powers internal circuitry and supplies OUT during normal operation. |
| 6 OUT | Regulated output | Sources from VCC when active; switches to VBATT during brownout; delivers up to 150mA from VCC, 25mA from BATT. |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V backup source; internal MOSFET connects BATT to OUT only when VCC < VTH and VBATT > VCC + 20mV. |
| 8 CE OUT | Chip-enable output | Passes CE IN signal during normal operation; held low for 12µs after reset assertion if CE IN was low, preventing partial writes. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-on output indicator | Dedicated push-pull BATT ON pin confirms backup mode activation without software polling or external logic. |
| Factory-trimmed reset threshold | 3.08V ±1.5% over -40°C to +85°C eliminates external resistor networks and calibration effort. |
| Ultra-low quiescent current | 10µA typical supply current extends shelf life and runtime of coin-cell–powered backup systems. |
| Chip-enable gating with 1.5ns delay | Prevents SRAM corruption during power transitions while maintaining compatibility with 100MHz+ µP buses. |
| VCC/BATT switchover hysteresis | 40mV total hysteresis (±20mV) suppresses chatter during marginal VCC conditions near threshold. |
Applications
| Portable POS Terminals | Industrial Programmable Logic Controllers |
|---|---|
|
Use Scenario: Battery-backed SRAM retains transaction logs and configuration data during AC power interruption in handheld payment devices. IC Role / Device Role / Timing Role: Supervisory IC monitors 3.3V main rail, switches SRAM supply to coin cell, asserts BATT ON to illuminate low-power status LED, and gates CE to prevent write errors. Use Value: Enables >10-year backup runtime with CR2032 cell and eliminates need for external switchover FET or discrete reset comparator. |
Use Scenario: Maintaining real-time clock and I/O state during brief plant-wide brownouts in factory automation systems. IC Role / Device Role / Timing Role: Provides deterministic 150ms reset hold-off, isolates CMOS RAM via CE gating, and signals backup activation via BATT ON to PLC diagnostics bus. Use Value: Guarantees deterministic recovery without firmware intervention and reduces BOM count by replacing 4 discrete components. |
| Set-Top Box Firmware Storage | Medical Infusion Pump Memory Protection |
|
Use Scenario: Preserving channel lineup, parental controls, and network credentials across unplanned power cycles in consumer STBs. IC Role / Device Role / Timing Role: Monitors 3.3V SoC supply, enables seamless VCC→BATT transition, asserts RESET to halt processor, and blocks CE during switchover. Use Value: Eliminates EEPROM wear-out from frequent power-loss writes and ensures sub-200ms recovery on restore. |
Use Scenario: Securing drug dosage history and calibration constants during battery swap in Class II medical devices. IC Role / Device Role / Timing Role: Acts as safety-critical power supervisor: validates 3.0V rail, gates SRAM CE during transition, and drives BATT ON to trigger audible alert. Use Value: Meets IEC 62304 clause 5.5.3 for deterministic power-fail response and supports traceable backup event logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA31+T | Same reset threshold (3.08V), but push-pull active-low RESET output instead of open-drain active-high. | Requires inverted logic interface; unsuitable where host µP expects active-high reset or shares RESET line with other open-drain devices. | Select when system design mandates active-low reset signaling and no shared bus contention. |
| MAX6366PKA31+T | Replaces BATT ON with watchdog timer (1.6s timeout); identical pinout, reset threshold, and CE gating. | Used where software execution monitoring is prioritized over battery-status indication; cannot signal backup mode. | Choose when µP firmware requires watchdog supervision and BATT ON functionality is unnecessary. |
Compared with MAX6367PKA31+T, MAX6367HKA31+T offers compatible supervision but incompatible reset polarity, while MAX6366PKA31+T trades BATT ON for watchdog capability - making each suitable only for distinct system-level requirements.
Availability
MAX6367PKA31+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, set-top boxes, and medical infusion pumps requiring stable component supply with long-term lifecycle support.
Supply support for MAX6367PKA31+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 interface applications in industrial, automotive, and computing markets.
The MAX6365–MAX6368 family delivers integrated µP supervision with battery backup and CE gating - engineered specifically for space-constrained, battery-sensitive systems needing deterministic power-fail response and nonvolatile memory protection.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6367PKA31+T?
The MAX6367PKA31+T has a factory-trimmed reset threshold of 3.08V (minimum 3.00V, maximum 3.15V) across -40°C to +85°C. This value is laser-trimmed during production and does not require external resistors or calibration. The '31' suffix in MAX6367PKA31+T explicitly denotes this 3.08V threshold variant, ensuring consistent behavior across units without user adjustment.
Does MAX6367PKA31+T support both VCC and battery supply for the OUT pin?
Yes, MAX6367PKA31+T automatically switches the OUT pin between VCC and BATT based on supply conditions. When VCC ≥ VTH (3.08V) and VCC > VBATT + 20mV, OUT is sourced from VCC. When VCC falls below VTH and VBATT exceeds VCC by >20mV, OUT seamlessly transitions to VBATT. This dual-source capability ensures uninterrupted power to attached SRAM or RTC circuits during brownout events.
What is the function of the BATT ON pin on MAX6367PKA31+T?
The BATT ON pin on MAX6367PKA31+T is a dedicated push-pull output that drives high only when the device is actively in battery-backup mode - i.e., when VCC < VTH and VBATT > VCC + 20mV. It sinks up to 60mA at 0.4V saturation and sources ~10µA from OUT in backup mode. This pin enables direct LED indication or driving the base of an external PNP transistor for higher-current backup loads, eliminating need for external logic.
Can MAX6367PKA31+T be used without a backup battery?
Yes, MAX6367PKA31+T operates correctly without a backup battery. In such configurations, connect the BATT pin to GND and tie OUT directly to VCC. The device still provides full reset supervision, CE gating, and RESET output functionality. The BATT ON pin remains low, and switchover logic is disabled - preserving all core supervisory features while simplifying design for non-battery applications.
What is the guaranteed operating voltage range for MAX6367PKA31+T?
MAX6367PKA31+T operates from 1.2V to 5.5V on the VCC pin, with RESET and BATT ON outputs functional down to 1.2V. This wide range supports 1.8V, 2.5V, 3.3V, and 5V microprocessor systems. The device draws only 10µA quiescent current at 5.5V and maintains specified reset timing and threshold accuracy across the full temperature range (-40°C to +85°C).
MAX6367PKA31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6367PKA31+T FAQ
1.How can I place an order for MAX6367PKA31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367PKA31+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 MAX6367PKA31+T reliable?
The price and inventory of MAX6367PKA31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367PKA31+T is usually 5 days.
3.What payment methods are accepted for MAX6367PKA31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367PKA31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367PKA31+T?
MAX6367PKA31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367PKA31+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 MAX6367PKA31+T?
For technical support, including MAX6367PKA31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367PKA31+T requirements.
6.How does Aetrix verify that MAX6367PKA31+T is sourced from the original manufacturer or authorized distributors?
All MAX6367PKA31+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 MAX6367PKA31+T meets industry standards.
7.What is the process for return or replacement of MAX6367PKA31+T?
All MAX6367PKA31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367PKA31+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 MAX6367PKA31+T part is unused and in its original packaging.
Return procedure for MAX6367PKA31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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