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Analog Devices Inc./Maxim Integrated MAX6367PKA26+T
- Part No.:
- MAX6367PKA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367PKA26+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,993
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Product details
Overview
The MAX6367PKA26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup control, chip-enable gating, and BATT ON indicator output. It monitors VCC supply voltage (reset threshold 2.55V–2.70V typ 2.63V), provides active-high open-drain BATT ON output, asserts reset during power-up/down/brownout, and supports VCC operation down to +1.2V. It is used in portable equipment, POS terminals, and industrial controllers requiring reliable memory backup and supply monitoring.
For engineers reviewing the MAX6367PKA26+T datasheet, MAX6367PKA26+T pinout, MAX6367PKA26+T application, or MAX6367PKA26+T equivalent, key selection criteria include its 2.63V factory-set reset threshold, BATT ON push-pull high-indicator function, 8-pin SOT23 package, battery-switchover hysteresis (±20mV), and guaranteed RESET/RESET operation down to 1.2V.
Technical Context
The MAX6367PKA26+T implements a precision voltage monitor with internal 2.63V reset threshold (±0.08V over temperature), automatic VCC-to-BATT switchover when VCC falls below both VTH and VBATT (with 40mV hysteresis), and dedicated push-pull BATT ON output that drives high exclusively in battery-backup mode. Its CE IN/CE OUT transmission gate provides 1.5ns propagation delay and 20–100Ω on-resistance for chip-enable signal gating during fault conditions.
It operates across -40°C to +85°C with quiescent current ≤50µA (typ 15µA) at VCC = 5.5V and ≤3µA in battery-backup mode (VBATT = 2.8V, VCC = 0V). The device guarantees reset timeout ≥150ms and supports VCC and VBATT supply voltages from 1.2V to 5.5V, enabling compatibility with 1.8V, 2.5V, 3.3V, and 5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V–2.70V (typ 2.63V); ensures reliable reset assertion for 2.5V logic rails with ±3% tolerance over temp. |
| Reset Timeout Period | 150–280ms; guarantees µP initialization completes before release, preventing premature code execution. |
| BATT ON Output Type | Push-pull active-high; sinks 60mA at 0.4V saturation, eliminating need for external pull-up in status indication. |
| VCC Operating Range | 1.2V to 5.5V; enables direct integration into ultra-low-voltage IoT sensors and legacy 5V industrial controllers. |
| Quiescent Current | 15µA (typ) at VCC = 5.5V; extends battery life in always-on portable devices without compromising supervision accuracy. |
| Battery-Backup Supply Current | 3µA (max) at VBATT = 2.8V, VCC = 0V; minimizes drain on coin-cell batteries during extended power loss. |
| VCC-to-BATT Switchover Hysteresis | ±20mV; prevents oscillation during slow VCC decay by enforcing 40mV total hysteresis window. |
Pinout & Package
Package: 8-pin SOT23 (2.9mm × 1.6mm × 1.1mm), lead(Pb)-free, tape-and-reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC brownout/power-down; requires external pull-down for logic-low default state. |
| 2 CE IN | Chip-enable input | Controls gating path to CE OUT; low during normal operation enables CE pass-through; ignored during reset. |
| 3 GND | Ground reference | Common return for VCC, BATT, and all internal circuits; must be low-impedance connection. |
| 4 BATT ON | Battery-backup status indicator | Drives high only when VCC < VTH and VCC < VBATT; directly interfaces LEDs or base of external PNP pass transistor. |
| 5 VCC | Main supply input | Powers internal circuitry and sources OUT up to 150mA; monitored for reset generation and switchover control. |
| 6 OUT | Regulated output rail | Switches between VCC and VBATT based on switchover logic; powers SRAM or real-time clock during main supply failure. |
| 7 BATT | Backup battery input | Supplies OUT when VCC fails; must exceed VCC by ≥20mV to engage switchover; reverse-current protected. |
| 8 CE OUT | Gated 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 |
|---|---|
| Battery-On Output Indicator | Dedicated push-pull BATT ON pin signals backup mode unambiguously-no external logic or resistor needed for status reporting. |
| Chip-Enable Gating with 1.5ns Delay | Prevents erroneous SRAM writes during power faults via sub-2ns propagation; compatible with high-speed µPs and DSPs. |
| Factory-Preset 2.63V Reset Threshold | Eliminates external resistor network for 2.5V system monitoring-reduces BOM count and layout area. |
| 1.2V Minimum Operating Voltage | Supports direct interface to emerging ultra-low-power MCUs and energy-harvesting subsystems without level-shifting. |
| 40mV Total Switchover Hysteresis | Ensures clean, bounce-free transition between VCC and BATT supplies even during slow-ramp brownouts. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter retains real-time clock and calibration data during AC adapter disconnection or low-battery shutdown. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail, switches SRAM to coin-cell backup, and asserts BATT ON to trigger low-power firmware state save. Use Value: Guarantees zero-data-loss memory retention for >10 years on CR2032 via <3µA backup current and 40mV hysteresis. | Use Scenario: DIN-rail mounted controller maintains I/O configuration and last-scan state during factory line power dips or fuse blowouts. IC Role / Device Role / Timing Role: Resets CPU on 24VDC supply sag, gates CE to prevent corrupted register writes, and signals backup activation via BATT ON to SCADA HMI. Use Value: Enables deterministic recovery within 280ms reset timeout and eliminates field failures from partial memory writes during transients. |
| Retail Point-of-Sale Terminals | Smart Energy Meters |
Use Scenario: Self-checkout kiosk preserves transaction buffer and encryption keys during brief UPS switchover or grid flicker. IC Role / Device Role / Timing Role: Monitors 5V system rail, isolates flash memory CE during brownout, and activates BATT ON to log power-event timestamp. Use Value: Prevents PCI-DSS compliance violations by ensuring atomic write completion for financial data using 150ms minimum reset hold time. | Use Scenario: Meter continues timekeeping and tamper-detection logging during 220VAC outage using supercapacitor backup. IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply, switches RTC/SRAM to backup, and drives BATT ON to enable auxiliary low-power telemetry radio. Use Value: Achieves IEC 62056-21 compliance with <1.2V operation margin and guaranteed 2.63V reset threshold accuracy across -40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA26+T | Same 2.63V reset threshold and BATT ON function, but features active-high push-pull RESET output instead of open-drain. | Requires no external pull-down resistor on RESET; better suited for driving TTL inputs directly. | Select when system design lacks pull-down on reset line and needs guaranteed logic-high release state. |
| TPS3808G33DBVR | 3.3V fixed reset threshold (not adjustable), no BATT ON output, no chip-enable gating, 1.8V–6.5V VCC range. | Lacks battery switchover and memory protection functions; suitable only for basic reset-only applications. | Choose only if BATT ON indicator and CE gating are unnecessary and 3.3V threshold suffices. |
Compared with MAX6367HKA26+T, the MAX6367PKA26+T offers open-drain RESET for wired-OR configurations, while TPS3808G33DBVR omits battery management entirely-making MAX6367PKA26+T uniquely fit for memory-critical portable designs requiring coordinated backup and status signaling.
Availability
MAX6367PKA26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and retail point-of-sale terminals requiring stable component supply, long-term lifecycle support, and guaranteed lead(Pb)-free compliance.
Supply support for MAX6367PKA26+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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX6365–MAX6368 family delivers integrated power-supply supervision, battery switchover, and memory write protection for space-constrained µP systems-targeting portable, industrial, and infrastructure equipment where reliability and ultra-low quiescent current are critical.
FAQ
What is the exact reset threshold voltage of the MAX6367PKA26+T?
The MAX6367PKA26+T has a factory-trimmed reset threshold of 2.55V (min), 2.63V (typ), and 2.70V (max) over temperature. This 2.63V nominal value is optimized for reliable supervision of 2.5V logic rails with ±3% tolerance, and is specified across the full -40°C to +85°C operating range per the Electrical Characteristics table.
Does the MAX6367PKA26+T provide battery switchover functionality?
Yes, the MAX6367PKA26+T automatically switches the OUT pin from VCC to BATT when VCC falls below both the reset threshold (2.63V) and VBATT by at least 20mV. It incorporates 40mV total hysteresis to prevent chatter during slow VCC decay, and supports backup currents up to 20mA with <3µA quiescent draw in battery mode.
What is the function of the BATT ON pin on the MAX6367PKA26+T?
The BATT ON pin on the MAX6367PKA26+T is a push-pull active-high output that drives high exclusively when the device is in battery-backup mode (i.e., VCC < VTH and VCC < VBATT). It sinks 60mA at 0.4V saturation and can directly drive LEDs or the base of an external PNP transistor for higher-current backup loads.
Can the MAX6367PKA26+T be used without a backup battery?
Yes, the MAX6367PKA26+T operates normally without a backup battery: connect BATT to GND and tie OUT to VCC. All supervision functions-including reset generation, CE gating, and BATT ON assertion-remain fully functional, though BATT ON will never activate since battery-backup mode cannot occur.
What package type and dimensions does the MAX6367PKA26+T use?
The MAX6367PKA26+T uses an 8-pin SOT23 package measuring 2.9mm × 1.6mm × 1.1mm with lead(Pb)-free terminations. It is supplied in tape-and-reel format (2500 pieces per reel), and the "+T" suffix explicitly denotes RoHS-compliant, Pb-free packaging per Maxim's ordering conventions.
MAX6367PKA26+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:
- 2.63V
- 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
MAX6367PKA26+T FAQ
1.How can I place an order for MAX6367PKA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367PKA26+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 MAX6367PKA26+T reliable?
The price and inventory of MAX6367PKA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367PKA26+T is usually 5 days.
3.What payment methods are accepted for MAX6367PKA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367PKA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367PKA26+T?
MAX6367PKA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367PKA26+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 MAX6367PKA26+T?
For technical support, including MAX6367PKA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367PKA26+T requirements.
6.How does Aetrix verify that MAX6367PKA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6367PKA26+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 MAX6367PKA26+T meets industry standards.
7.What is the process for return or replacement of MAX6367PKA26+T?
All MAX6367PKA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367PKA26+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 MAX6367PKA26+T part is unused and in its original packaging.
Return procedure for MAX6367PKA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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