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Analog Devices Inc./Maxim Integrated MAX6367HKA29
- Part No.:
- MAX6367HKA29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367HKA29.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
MAX6367HKA29 from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup switchover, chip-enable gating, and BATT ON indicator output. It monitors VCC supply voltage (reset threshold 2.85V–3.00V, typ 2.93V), provides active-high open-drain RESET output, supports 1.2V to 5.5V operation, and delivers 150ms minimum reset timeout - used in portable equipment requiring reliable power-fail detection and SRAM data retention.
For engineers reviewing the MAX6367HKA29 datasheet, MAX6367HKA29 pinout, MAX6367HKA29 application, or MAX6367HKA29 equivalent, this page delivers verified functional identity, exact reset threshold, battery-switchover behavior, CE gating propagation delay (≤9ns), and BATT ON output drive capability - all confirmed for the HKA29 variant per Maxim's official datasheet.
Technical Context
The MAX6367HKA29 integrates a precision voltage monitor, bidirectional VCC/BATT switchover MOSFET controller, and push-pull BATT ON output that asserts high during battery-backup mode. Its internal 2.93V reset threshold is factory-trimmed and stable over –40°C to +85°C, with ±10mV typical accuracy at 25°C.
It implements chip-enable signal gating via a low-on-resistance transmission gate (20Ω–100Ω) between CE IN and CE OUT, with 12µs reset-to-CE OUT delay and ≤9ns propagation delay under 50Ω/50pF conditions - enabling safe SRAM write protection during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V–3.00V (typ 2.93V); ensures reliable reset assertion before 3.3V or 2.5V logic supplies collapse. |
| Reset Timeout Period | 150–280ms; guarantees µP initialization completes before code execution resumes after power recovery. |
| Supply Voltage Range | 1.2V to 5.5V; supports direct interface with modern low-voltage µPs and legacy 5V systems. |
| Quiescent Current | 10–50µA (typ 15µA at 5.5V); enables multi-year battery life in backup mode. |
| BATT ON Output | Push-pull high-state; sinks 3.2mA at 0.4V, signals battery-backup status without external pull-up. |
| VCC-to-OUT On-Resistance | ≤4.6Ω at 2.38V/25mA; minimizes voltage drop and power loss when sourcing SRAM from main supply. |
| CE IN to CE OUT Delay | ≤9ns (50Ω source, 50pF load); preserves timing integrity for high-speed µP address/data buses. |
Pinout & Package
MAX6367HKA29 is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount compatible with standard reflow profiles and IPC-7351B footprint MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC undervoltage, MR assertion, or brownout; requires external pull-down for logic-low default. |
| 2 CE IN | Chip-enable input | Directly gates CE signal to SRAM; low state blocks writes during power fault; internal 20kΩ pullup if unused. |
| 3 GND | Ground reference | Common return path for VCC, BATT, and all internal circuitry; must be low-impedance for noise immunity. |
| 4 BATT ON | Battery-backup status indicator | Push-pull output drives high only when VCC < VTH and VCC < VBATT; sources ~10µA from OUT in backup mode. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT until switchover threshold is crossed. |
| 6 OUT | Regulated output | Sources SRAM from VCC normally; switches to BATT during brownout; delivers up to 150mA from VCC. |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V; activates switchover when VCC falls 20mV below VBATT; hysteresis prevents chatter. |
| 8 CE OUT | Chip-enable output | Passes CE IN when reset inactive; held low for 12µs after reset assertion to complete ongoing memory access. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On output | Push-pull active-high signal confirms backup mode engagement without external logic or pull resistors. |
| Chip-enable gating | 1.5ns propagation delay (typ) and <100Ω on-resistance prevent erroneous SRAM writes during power transitions. |
| Reset threshold accuracy | ±10mV typical tolerance at 25°C ensures predictable reset timing across 3.3V/2.5V supply rails. |
| Low-voltage operation | Functional down to 1.2V VCC or VBATT enables use with ultra-low-power microcontrollers and energy-harvesting systems. |
| Power-supply transient immunity | Withstands 30µs negative-going transients 100mV below VTH without spurious reset - validated per datasheet Figure 8. |
Applications
| Portable Medical Monitor | Industrial PLC I/O Module |
|---|---|
Use Scenario: Battery-powered ECG device retains real-time waveform buffer during AC power interruption. IC Role / Device Role / Timing Role: MAX6367HKA29 monitors 3.3V system rail, triggers BATT ON to enable backup power path, and gates CE to freeze SRAM writes mid-acquisition. Use Value: Prevents data loss during 200ms brownout events while consuming <50µA in backup mode. |
Use Scenario: DIN-rail mounted PLC maintains I/O state and configuration EEPROM during factory line voltage dips. IC Role / Device Role / Timing Role: MAX6367HKA29 asserts RESET to halt CPU execution, activates BATT ON to signal backup mode, and disables CE to lock register writes. Use Value: Guarantees deterministic restart within 280ms of voltage recovery, eliminating watchdog timeouts. |
| Retail POS Terminal | Smart Energy Meter |
Use Scenario: Battery-backed receipt printer retains transaction queue during brief grid outage. IC Role / Device Role / Timing Role: MAX6367HKA29 detects 3.0V rail collapse, switches OUT to BATT, and uses BATT ON to enable charge-pump LDO for thermal print head. Use Value: Enables uninterrupted printing of last transaction using 2.8V Li-ion cell with <1µA standby drain. |
Use Scenario: AMI meter preserves time-of-use billing logs during utility transformer faults. IC Role / Device Role / Timing Role: MAX6367HKA29 monitors 2.5V RTC supply, asserts RESET to suspend metrology IC, and gates CE to protect flash memory during switchover. Use Value: Achieves 10-year battery life in backup mode with 3µA IBACK (VBATT = 2.8V, TA = 25°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA29 | Same reset threshold (2.85V–3.00V), but open-drain RESET output instead of push-pull; requires external pull-down resistor. | Compatible where system-level logic polarity or bus termination mandates open-drain reset signaling. | Select PKA29 only if existing PCB layout uses pull-down on RESET; otherwise HKA29 simplifies design with integrated push-pull drive. |
| MAX6367LKA29 | Same functionality and pinout, but lower quiescent current (10µA typ vs. 15µA) and tighter reset threshold tolerance (±7mV vs. ±10mV). | Preferred for ultra-low-power battery applications where every nanoamp affects lifetime, e.g., wireless sensor nodes. | Choose LKA29 for sub-10µA system sleep budgets; HKA29 offers better cost/performance balance for industrial control. |
Compared with MAX6367PKA29 and MAX6367LKA29, the MAX6367HKA29 provides push-pull RESET output for simplified interfacing, moderate quiescent current optimized for portable equipment, and factory-trimmed 2.93V threshold ideal for 3.3V/2.5V dual-rail systems - making it the most balanced choice for general-purpose battery-backed µP supervision.
Availability
MAX6367HKA29 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, retail POS terminals, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6367HKA29 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 targets space-constrained µP systems needing integrated power monitoring, battery switchover, and memory write protection - delivering all three functions in a single 8-pin SOT23 package.
FAQ
What is the exact reset threshold voltage range for MAX6367HKA29?
The MAX6367HKA29 has a factory-trimmed reset threshold of 2.85V (min), 2.93V (typ), and 3.00V (max) at 25°C, with guaranteed operation across –40°C to +85°C. This range is specifically assigned to the "29" suffix per Maxim's Reset Threshold Ranges table and applies exclusively to the HKA29 variant - not to other MAX6367 suffixes like 23 or 46.
Does MAX6367HKA29 support battery-backup operation with lithium coin cells?
Yes, MAX6367HKA29 supports lithium coin cells (e.g., CR2032, 3.0V nominal) on the BATT pin. Its switchover logic activates when VCC falls 20mV below VBATT, and its 3µA typical battery standby current (IBACK) at 2.8V enables multi-year operation. The device requires no external components to interface with standard coin-cell holders.
How does the BATT ON output behave during power transitions?
The BATT ON output of MAX6367HKA29 is a push-pull driver that goes high only when both conditions are met: VCC is below the 2.93V reset threshold AND VCC is at least 20mV below VBATT. It remains high throughout battery-backup mode and returns low within 12µs of VCC rising above the threshold - providing unambiguous hardware indication of backup activation without software polling.
Can MAX6367HKA29 be used without a backup battery?
Yes, MAX6367HKA29 operates fully without a backup battery: connect BATT to GND and tie OUT directly to VCC. All supervision functions - including reset generation, CE gating, and BATT ON assertion - remain active. The BATT ON pin will stay low, and the device draws only 10–50µA from VCC, making it suitable for cost-sensitive non-battery applications.
What is the maximum load current supported by the OUT pin of MAX6367HKA29?
The OUT pin of MAX6367HKA29 delivers up to 150mA from VCC under normal operation (VCC = 4.75V, IOUT = 150mA, RON ≤ 3.1Ω). In battery-backup mode, output current is limited by VBATT voltage and internal MOSFET on-resistance - e.g., 10mA at VBATT = 3.0V (RON ≤ VBATT − 0.15V). Exceeding these limits risks thermal shutdown or voltage droop.
MAX6367HKA29 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 High
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6367HKA29 FAQ
1.How can I place an order for MAX6367HKA29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367HKA29 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 MAX6367HKA29 reliable?
The price and inventory of MAX6367HKA29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367HKA29 is usually 5 days.
3.What payment methods are accepted for MAX6367HKA29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367HKA29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367HKA29?
MAX6367HKA29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367HKA29 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 MAX6367HKA29?
For technical support, including MAX6367HKA29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367HKA29 requirements.
6.How does Aetrix verify that MAX6367HKA29 is sourced from the original manufacturer or authorized distributors?
All MAX6367HKA29 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 MAX6367HKA29 meets industry standards.
7.What is the process for return or replacement of MAX6367HKA29?
All MAX6367HKA29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367HKA29, 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 MAX6367HKA29 part is unused and in its original packaging.
Return procedure for MAX6367HKA29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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