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Analog Devices Inc./Maxim Integrated MAX6367PKA29
- Part No.:
- MAX6367PKA29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367PKA29.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:9,870
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Product details
Overview
MAX6367PKA29 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 2.85V–3.00V), provides 150ms minimum reset timeout, operates down to 1.2V supply, and delivers active-high BATT ON signal during battery switchover. It is used in portable equipment requiring reliable RAM data retention during main power failure.
For engineers reviewing the MAX6367PKA29 datasheet, MAX6367PKA29 pinout, MAX6367PKA29 application, or MAX6367PKA29 equivalent, key selection criteria include its factory-set 2.93V typical reset threshold, push-pull BATT ON output, open-drain active-low RESET, SOT23-8 package, and guaranteed operation at VCC/VBATT ≥1.2V.
Technical Context
The MAX6367PKA29 integrates a precision voltage monitor, battery switchover MOSFET controller, and dedicated BATT ON push-pull output. Its reset generator asserts when VCC falls below 2.93V (typ), remains active for ≥150ms after VCC recovery, and guarantees valid RESET/RESET states down to 1.2V supply.
Battery switchover occurs only when both VCC < VTH and VCC < VBATT − 20mV, with 40mV hysteresis to prevent oscillation. The BATT ON output drives high in backup mode, sinking 3.2mA at 0.4V saturation, and sources ~10µA from OUT to indicate battery engagement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V–3.00V (min/max), 2.93V typical - sets precise brownout detection point for +3.0V systems |
| Reset Timeout Period | 150–280ms - ensures µP completes full reset sequence before resuming execution | Supply Voltage Range | 1.2V to 5.5V - supports ultra-low-voltage operation and compatibility with 1.8V/2.5V/3.3V/5.0V rails |
| Quiescent Current | 10µA typical - enables multi-year battery life in always-on backup applications |
| BATT ON Output | Push-pull, active-high, sinks 3.2mA @ 0.4V - directly drives LEDs or external pass transistors without pull-up |
| Chip-Enable Propagation Delay | 1.5–9ns - preserves timing integrity for high-speed µP address/data bus gating |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
MAX6367PKA29 is housed in an 8-pin SOT23-8 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with exposed pad option not specified.
| 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 of CE signal to SRAM; low disables write path during reset |
| 3 GND | Ground reference | Common return for VCC, BATT, and internal circuitry; must be low-impedance |
| 4 BATT ON | Battery-on status indicator | Push-pull output that drives high only when device is in battery-backup mode |
| 5 RESET IN | Not connected - MAX6367 variant excludes RESET IN function | This pin is no-connect (NC) on MAX6367PKA29; unused and must be left floating or tied to GND |
| 6 VCC | Main supply input | Primary power source (1.2V–5.5V); reset asserts when voltage drops below 2.93V threshold |
| 7 OUT | Regulated output | Sources from VCC normally; switches to BATT during backup mode to sustain SRAM power |
| 8 BATT | Backup battery input | Accepts 2.0V–5.5V backup source; engages when VCC < VTH and VCC < VBATT − 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Output Indicator | Dedicated push-pull BATT ON pin signals battery engagement with 3.2mA sink capability - eliminates need for external comparator or LED driver |
| On-Board Chip-Enable Gating | 1.5ns propagation delay and <100Ω on-resistance - prevents SRAM corruption during power transitions without adding external logic |
| Ultra-Low Quiescent Current | 10µA typical supply current - extends shelf life and runtime in battery-backed systems such as real-time clocks and POS terminals |
| Voltage Monitoring Precision | ±1.5% reset threshold accuracy over temperature - ensures consistent brownout response across -40°C to +85°C without calibration |
| Power-Supply Transient Immunity | Withstands 30µs negative-going VCC glitches down to 100mV below threshold - avoids spurious resets in noisy industrial environments |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG monitor retains patient waveform data during AC adapter disconnection or low-battery switchover. IC Role / Device Role / Timing Role: MAX6367PKA29 monitors main 3.3V rail, triggers BATT ON to enable backup power path, and gates CE to freeze SRAM writes during transition. Use Value: Prevents data loss and ensures deterministic restart by guaranteeing ≥150ms reset hold time and sub-10ns CE gating delay. | Use Scenario: Remote environmental sensor node logs temperature/humidity to nonvolatile SRAM while switching between solar-charged Li-ion and primary supply. IC Role / Device Role / Timing Role: MAX6367PKA29 detects VCC sag below 2.93V, activates BATT ON to signal backup mode, and isolates memory via CE gating during switchover. Use Value: Enables seamless power-source handover with <40mV hysteresis, eliminating memory corruption and reducing firmware complexity. |
| Retail Point-of-Sale Terminals | Smart Meters |
Use Scenario: POS terminal preserves transaction buffer and configuration settings during brief utility outages using coin-cell backup. IC Role / Device Role / Timing Role: MAX6367PKA29 asserts BATT ON to activate backup regulator, holds RESET until stable, and blocks CE to prevent partial writes to SRAM. Use Value: Guarantees atomic write completion and eliminates need for EEPROM wear-leveling or checksum validation overhead. | Use Scenario: Electricity meter maintains timekeeping and tariff data during grid interruptions using supercapacitor backup. IC Role / Device Role / Timing Role: MAX6367PKA29 monitors 3.0V system rail, drives BATT ON to enable supercap discharge path, and gates CE to lock memory access during brownout. Use Value: Achieves >10-year backup lifetime with 10µA quiescent current and eliminates external supervision ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA29 | Same reset threshold (2.93V), but features push-pull active-high RESET instead of open-drain | Requires no external pull-up resistor on RESET line; better suited for direct µP reset inputs expecting active-high drive | Select MAX6367HKA29 if µP reset pin is active-high and lacks internal pull-up |
| TPS3808G33 | 3.3V fixed reset threshold, 350ms timeout, 2.5µA quiescent current, SOT23-6 package | Lacks battery switchover, BATT ON output, and CE gating - suitable only for basic reset monitoring without backup functions | Choose TPS3808G33 only when battery backup and memory protection are unnecessary |
Compared with MAX6367HKA29 and TPS3808G33, MAX6367PKA29 uniquely combines open-drain RESET flexibility, integrated BATT ON signaling, and chip-enable gating in a single SOT23-8 package-enabling compact, robust power supervision for battery-critical embedded systems.
Availability
MAX6367PKA29 is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, retail point-of-sale terminals, smart meters, and battery-backed real-time clock modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6367PKA29 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 communications applications.
The MAX6365–MAX6368 family was engineered specifically for microprocessor systems needing integrated power monitoring, battery switchover, and memory write protection - targeting space-constrained, battery-sensitive applications like portable instrumentation and energy metering.
FAQ
What is the exact reset threshold voltage of MAX6367PKA29?
The MAX6367PKA29 has a factory-trimmed reset threshold range of 2.85V (min) to 3.00V (max), with a typical value of 2.93V at +25°C. This threshold is guaranteed over the full -40°C to +85°C operating temperature range and applies to VCC monitoring only - it does not affect BATT ON activation, which depends solely on battery switchover conditions.
Does MAX6367PKA29 provide battery switchover functionality?
Yes, MAX6367PKA29 automatically switches the OUT pin from VCC to BATT when two conditions are met: VCC falls below the 2.93V reset threshold and VCC is at least 20mV lower than VBATT. The device uses internal MOSFETs with temperature-compensated on-resistance (e.g., 4.6Ω at 2.38V/25mA) to maintain SRAM power during main supply failure.
What is the function of the BATT ON pin on MAX6367PKA29?
The BATT ON pin on MAX6367PKA29 is a push-pull active-high output that drives high exclusively during battery-backup mode. It sinks 3.2mA at 0.4V saturation and can directly drive status LEDs or base-emitter junctions of external PNP pass transistors. It remains low during normal VCC operation and asserts high only when VCC < VTH and VCC < VBATT − 20mV.
Can MAX6367PKA29 be used without a backup battery?
Yes, MAX6367PKA29 operates correctly without a backup battery: connect BATT to GND and tie OUT to VCC. In this configuration, the device functions as a standard supervisory circuit with reset generation and CE gating, but BATT ON remains low and battery switchover is disabled. All other features - including 150ms reset timeout and 10µA quiescent current - remain fully functional.
What package type and pin count does MAX6367PKA29 use?
MAX6367PKA29 uses an 8-pin SOT23-8 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free, and RoHS-compliant. Pin 5 (RESET IN) is a no-connect (NC) on this MAX6367 variant and must be left unconnected or tied to GND - it is not internally bonded and has no electrical function in MAX6367PKA29.
MAX6367PKA29 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:
- 2.93V
- 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
MAX6367PKA29 FAQ
1.How can I place an order for MAX6367PKA29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367PKA29 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 MAX6367PKA29 reliable?
The price and inventory of MAX6367PKA29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367PKA29 is usually 5 days.
3.What payment methods are accepted for MAX6367PKA29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367PKA29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367PKA29?
MAX6367PKA29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367PKA29 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 MAX6367PKA29?
For technical support, including MAX6367PKA29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367PKA29 requirements.
6.How does Aetrix verify that MAX6367PKA29 is sourced from the original manufacturer or authorized distributors?
All MAX6367PKA29 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 MAX6367PKA29 meets industry standards.
7.What is the process for return or replacement of MAX6367PKA29?
All MAX6367PKA29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367PKA29, 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 MAX6367PKA29 part is unused and in its original packaging.
Return procedure for MAX6367PKA29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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