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Analog Devices Inc./Maxim Integrated MAX6367HKA31+T
- Part No.:
- MAX6367HKA31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367HKA31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,415
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Product details
Overview
The MAX6367HKA31+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 = 3.08 V), provides active-high open-drain reset assertion during power-up/down/brownout, switches OUT between VCC and backup battery (VBATT) with 40 mV hysteresis, and drives BATT ON high in battery-backup mode. It is used in portable equipment requiring nonvolatile memory retention during main power loss.
For engineers reviewing the MAX6367HKA31+T datasheet, MAX6367HKA31+T pinout, MAX6367HKA31+T application, or MAX6367HKA31+T equivalent, key selection criteria include its 3.08 V factory-set reset threshold, BATT ON push-pull output capability, 150 ms minimum reset timeout, 10 µA quiescent current, and SOT23-8 package compatibility with space-constrained embedded systems.
Technical Context
The MAX6367HKA31+T implements a precision voltage monitor with ±1.5% threshold accuracy over temperature, a bidirectional VCC/BATT switchover MOSFET with on-resistance <4.6 Ω at 2.38 V, and a dedicated push-pull BATT ON output that sources ~10 µA from OUT and sinks 3.2 mA at 0.4 V saturation. Its chip-enable gating path features 1.5 ns propagation delay and 20–100 Ω on-resistance when enabled.
Reset generation is triggered by VCC falling below 3.08 V (min 3.00 V, max 3.15 V), MR input (not present on MAX6367), or internal brownout detection - with guaranteed reset assertion down to 1.2 V VCC or VBATT. The device operates across -40°C to +85°C and supports 1.2 V to 5.5 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.08 V (typ), 3.00–3.15 V range - sets precise brownout detection point for +3.3 V systems |
| Reset Timeout Period | 150–280 ms - ensures µP remains held in reset long enough for stable power recovery |
| Quiescent Supply Current | 10–50 µA - enables ultra-low-power operation in battery-backed standby mode |
| BATT ON Output Type | Push-pull active-high - directly drives LEDs or external pass transistors without pull-up resistors |
| VCC-to-OUT On-Resistance | 4.6 Ω (max at 2.38 V, 25 mA) - minimizes voltage drop and power loss during main supply operation |
| Battery-Backup Current | 3 µA (max at -40°C to +85°C, VBATT = 2.8 V) - preserves battery life for multi-year backup applications |
| Operating Temperature Range | -40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
MAX6367HKA31+T is housed in an 8-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm height), surface-mount, lead(Pb)-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC undervoltage; requires external pull-down for logic-low default state |
| 2 CE IN | Chip-enable input | Controls gating of CE signal to SRAM; low enables pass-through, high disables during reset |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance connection |
| 4 BATT ON | Battery-on status indicator | Push-pull output driven high only when device is in battery-backup mode (VCC < VTH and VCC < VBATT) |
| 5 VCC | Main supply input | Primary power source (1.2–5.5 V); powers internal circuitry and supplies OUT when above threshold |
| 6 OUT | Switched output | Delivers power to SRAM/RTC; sourced from VCC normally, switches to VBATT during brownout |
| 7 BATT | Backup battery input | Accepts 0–6 V backup source; activates switchover when >20 mV above VCC and VCC < VTH |
| 8 CE OUT | Chip-enable output | Gated CE signal to memory; follows CE IN with 1.5 ns delay when not in reset; pulled up to OUT during reset |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Output Indicator | Dedicated push-pull BATT ON pin signals battery-backup mode with no external components required |
| Precision Reset Threshold | Factory-trimmed 3.08 V ±1.5% over -40°C to +85°C eliminates need for external resistor divider calibration |
| Chip-Enable Gating Propagation Delay | 1.5 ns maximum ensures compatibility with high-speed µPs and DSPs without timing violation |
| VCC/BATT Switchover Hysteresis | 40 mV prevents oscillation during slow VCC ramp-down or noisy supply conditions |
| Low 10 µA Quiescent Current | Enables >10-year battery life in always-on backup applications using standard coin cells |
Applications
| Portable Medical Monitors | Industrial PLC Data Loggers |
|---|---|
Use Scenario: Continuous vital-sign recording with volatile SRAM buffer during AC mains interruption. IC Role / Device Role / Timing Role: Supervisory IC providing brownout detection, automatic battery switchover to SRAM, and BATT ON status signaling to host MCU. Use Value: Prevents data loss during 100–200 ms power gaps; 3.08 V threshold matches 3.3 V system rail; 10 µA IBACK extends CR2032 battery life beyond 5 years. |
Use Scenario: Retaining configuration and last-known sensor values in programmable logic controllers during factory power dips. IC Role / Device Role / Timing Role: System-level supervisor managing VCC monitoring, CE gating to prevent write corruption, and BATT ON-driven LED alert. Use Value: 150 ms tRP guarantees safe µP reset hold time; 4.6 Ω RON limits voltage droop on 150 mA SRAM load; 40 mV hysteresis rejects 50 Hz ripple-induced false triggers. |
| Retail POS Terminals | Smart Energy Meters |
Use Scenario: Preserving transaction queue and encryption keys in handheld payment terminals during battery swap. IC Role / Device Role / Timing Role: Battery-backup controller enabling hot-swap capability via seamless VCC/BATT transition and CE gating during reset. Use Value: BATT ON output directly drives status LED and enables external MOSFET for higher-current backup loads; 3.08 V threshold avoids premature switchover on 3.3 V rail sag. |
Use Scenario: Maintaining time-of-use billing registers and tamper logs in electricity meters during grid outages. IC Role / Device Role / Timing Role: Precision supervisory circuit with RTC backup support, low-leakage battery switching, and fail-safe memory write protection. Use Value: 3 µA max IBACK at -40°C ensures >15-year backup from primary lithium battery; CE gating blocks erroneous writes during brownout; 1.5 ns delay preserves SPI/I²C timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367HKA29+T | Lower reset threshold (2.93 V typ) - optimized for 3.0 V systems | Suitable where tighter margin against 3.0 V rail dropout is required | Select when main supply nominal is 3.0 V and brownout must trigger earlier than 3.08 V |
| MAX6367PKA31+T | Same 3.08 V threshold but open-drain RESET (vs. open-drain RESET on MAX6367HKA31+T) and different output polarity | Requires external pull-up for active-low reset logic; lacks BATT ON's push-pull drive strength | Choose only if system design mandates active-low reset assertion and BATT ON indicator is unnecessary |
Compared with MAX6367HKA29+T and MAX6367PKA31+T, the MAX6367HKA31+T uniquely combines 3.08 V precision threshold, active-high open-drain RESET, and dedicated push-pull BATT ON output - making it optimal for +3.3 V systems needing unambiguous battery-status signaling without external level-shifting or pull resistors.
Availability
MAX6367HKA31+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC data loggers, and retail POS terminals requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6367HKA31+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 industrial, communications, computing, and consumer applications.
The MAX6365–MAX6368 family delivers integrated µP supervision with battery backup and chip-enable gating - engineered specifically for space-constrained, low-power embedded systems needing reliable memory retention during power failure.
FAQ
What is the exact reset threshold voltage of the MAX6367HKA31+T?
The MAX6367HKA31+T has a factory-set reset threshold of 3.08 V (typical), with a guaranteed range of 3.00 V to 3.15 V across -40°C to +85°C. This value is laser-trimmed and specified in the Reset Threshold Ranges table under suffix "31", confirming its suitability for monitoring +3.3 V power rails with margin against dropout.
Does the MAX6367HKA31+T provide active-high or active-low reset output?
The MAX6367HKA31+T provides an active-high open-drain RESET output (pin 1). It asserts high during VCC undervoltage, power-up, or brownout conditions, and remains asserted for ≥150 ms after VCC recovers above 3.08 V. It does not offer push-pull or active-low variants - those are assigned to other suffixes (e.g., "L" = push-pull active-low, "P" = open-drain active-low).
What function does the BATT ON pin serve on the MAX6367HKA31+T?
The BATT ON pin (pin 4) is a push-pull active-high output that drives high exclusively when the MAX6367HKA31+T is in battery-backup mode - i.e., when VCC falls below 3.08 V *and* VCC is at least 20 mV below VBATT. It sinks 3.2 mA at 0.4 V saturation and sources ~10 µA from OUT, enabling direct LED indication or base drive for external pass transistors.
Can the MAX6367HKA31+T operate with a 1.2 V supply voltage?
Yes, the MAX6367HKA31+T guarantees full functionality - including RESET/RESET assertion, BATT ON activation, and chip-enable gating - down to 1.2 V on either VCC or VBATT. Its ultra-low 10 µA quiescent current and 1.2 V minimum operating voltage make it suitable for single-cell Li-ion or coin-cell backup applications where supply headroom is minimal.
How does the chip-enable gating feature work in the MAX6367HKA31+T?
The MAX6367HKA31+T gates the CE signal between CE IN (pin 2) and CE OUT (pin 8) using a low-on-resistance transmission gate. During normal operation, CE IN passes through to CE OUT with 1.5 ns propagation delay. When reset asserts, CE OUT is disconnected from CE IN and actively pulled up to OUT - preventing spurious writes to SRAM during power faults. The path re-enables automatically after reset deasserts.
MAX6367HKA31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6367HKA31+T FAQ
1.How can I place an order for MAX6367HKA31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367HKA31+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 MAX6367HKA31+T reliable?
The price and inventory of MAX6367HKA31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367HKA31+T is usually 5 days.
3.What payment methods are accepted for MAX6367HKA31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367HKA31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367HKA31+T?
MAX6367HKA31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367HKA31+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 MAX6367HKA31+T?
For technical support, including MAX6367HKA31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367HKA31+T requirements.
6.How does Aetrix verify that MAX6367HKA31+T is sourced from the original manufacturer or authorized distributors?
All MAX6367HKA31+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 MAX6367HKA31+T meets industry standards.
7.What is the process for return or replacement of MAX6367HKA31+T?
All MAX6367HKA31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367HKA31+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 MAX6367HKA31+T part is unused and in its original packaging.
Return procedure for MAX6367HKA31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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