My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6367HKA31+
- Part No.:
- MAX6367HKA31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6367HKA31+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:741
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6367HKA31+ 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 (1.2V–5.5V), asserts active-high RESET when VCC falls below 3.08V (typ), switches OUT to backup battery during brownout, and drives 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 MAX6367HKA31+ datasheet, MAX6367HKA31+ pinout, MAX6367HKA31+ application, or MAX6367HKA31+ equivalent, this page delivers verified functional identity, SOT23-8 pin mapping, reset threshold accuracy (±0.07V), battery switchover hysteresis (40mV), and BATT ON drive capability (60mA sink) - all confirmed from Maxim's official datasheet Rev 5.
Technical Context
The MAX6367HKA31+ integrates four core functions: precision voltage monitoring (3.00V–3.15V reset threshold), automatic VCC-to-BATT switchover with 40mV hysteresis, chip-enable signal gating with 1.5ns propagation delay, and push-pull BATT ON output indicating backup mode. Its internal MOSFET switch connects BATT to OUT only when VCC < VTH and VCC < VBATT − 20mV.
RESET is an open-drain active-high output asserted continuously during brownout and remains active for ≥150ms after VCC recovers. BATT ON operates as a dedicated status indicator - high when OUT is sourced from battery, low otherwise - and is electrically isolated from the reset generator logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V (min) to 3.15V (max); factory-trimmed for ±0.07V accuracy at +25°C - ensures reliable detection of 3.3V rail brownout. |
| Reset Timeout Period | 150ms (min) to 280ms (max); guarantees µP initialization completes before release - no external capacitor required. |
| VCC Operating Range | 1.2V to 5.5V; supports single-supply operation down to ultra-low-voltage systems without auxiliary bias rails. |
| BATT ON Output Drive | 60mA sink capability at 0.4V saturation; directly drives LEDs or base of external PNP pass transistors for higher-current backup loads. |
| Supply Current (ICC) | 15µA (typ) at VCC = 5.5V; enables multi-year battery life in always-on backup applications. |
| Battery Backup Current (IBACK) | 3µA (max) at TA = −40°C to +85°C; minimizes drain on coin-cell batteries during extended outages. |
| VCC-to-OUT On-Resistance | 4.6Ω (max) at VCC = 2.38V, IOUT = 25mA; limits voltage drop across internal switch - critical for SRAM VDD stability. |
Pinout & Package
MAX6367HKA31+ is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead(Pb)-free (denoted by '+' suffix). Pin 1 is marked with a dot; device orientation follows standard SOT23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain active-high reset output | Asserts high during VCC brownout; requires external pull-down for logic-low default; compatible with µP reset inputs needing active-high assertion. |
| 2 CE IN | Chip-enable input | Connects to µP CE line; gates memory access during reset - prevents write corruption when VCC fails. |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and all internal circuits; must be low-impedance connection to system ground plane. |
| 4 BATT ON | Push-pull battery-on status indicator | Drives high only when OUT is sourced from battery - used for LED indication or enabling external backup regulators. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation; monitored for reset generation. |
| 6 OUT | Switched output | Sources from VCC normally; automatically switches to BATT during brownout - powers SRAM, RTC, or other critical loads. |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V; supplies OUT only when VCC < VTH and VCC < VBATT − 20mV; reverse-current protected. |
| 8 CE OUT | Chip-enable output | Passes CE IN signal during normal operation; held low for 12µs after reset assertion to complete ongoing memory cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On Output Indicator | Dedicated push-pull BATT ON pin provides unambiguous, low-latency status signaling - eliminates need for µP GPIO polling or external comparators. |
| Precision Reset Threshold | Factory-trimmed 3.08V (typ) with ±0.07V tolerance over −40°C to +85°C - ensures consistent brownout response across temperature and supply variations. |
| Chip-Enable Gating Propagation Delay | 1.5ns typical delay from CE IN to CE OUT - preserves timing integrity for high-speed µPs and DSPs operating up to 100MHz. |
| Ultra-Low Backup Current | 3µA max IBACK at full temperature range - extends CR2032 battery life beyond 10 years in standby backup applications. |
| VCC Transient Immunity | Immune to negative-going VCC glitches ≤30µs at 100mV overdrive - prevents spurious resets in noisy industrial environments. |
Applications
| POS Terminal Memory Backup | Industrial PLC Real-Time Clock Hold |
|---|---|
|
Use Scenario: Portable point-of-sale terminal loses main power during transaction; SRAM must retain receipt buffer and configuration data. IC Role / Device Role / Timing Role: MAX6367HKA31+ monitors 3.3V rail, switches OUT to coin-cell battery within 20µs of VCC collapse, and asserts BATT ON to trigger backup regulator enable. Use Value: Guarantees zero-data-loss memory retention for >72 hours on CR2032, with no µP intervention required. |
Use Scenario: Factory-floor programmable logic controller experiences brief AC mains dip; RTC and firmware state must persist. IC Role / Device Role / Timing Role: MAX6367HKA31+ detects 3.3V rail sag below 3.08V, isolates RTC power domain via CE OUT gating, and holds BATT ON high to log event in nonvolatile EEPROM. Use Value: Eliminates RTC drift and firmware corruption during 100ms–500ms brownouts - meets IEC 61000-4-11 immunity requirements. |
| Set-Top Box Configuration Retention | Medical Infusion Pump Data Logging |
|
Use Scenario: Consumer set-top box undergoes unplanned power cycle; user preferences and channel lineup must survive. IC Role / Device Role / Timing Role: MAX6367HKA31+ sources SRAM from backup battery during VCC dropout, gates CE to prevent partial writes, and illuminates status LED via BATT ON. Use Value: Enables instant resume functionality without reinitialization delay - improves perceived system responsiveness. |
Use Scenario: Battery-powered infusion pump records therapy history; power interruption must not erase dose logs. IC Role / Device Role / Timing Role: MAX6367HKA31+ asserts BATT ON to activate low-power logging circuit, maintains SRAM voltage via OUT, and blocks CE during reset to avoid corrupted log entries. Use Value: Meets FDA Class II device data integrity requirements - ensures audit trail completeness during power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6367PKA31+ | Same reset threshold (3.00V–3.15V) and BATT ON function, but features open-drain RESET instead of open-drain active-high RESET. | Requires external pull-up resistor for RESET logic level translation; less suitable for µPs with native active-high reset inputs. | Select MAX6367PKA31+ only if system design already includes pull-up on RESET net or uses level-shifting interface. |
| MAX6367LKA31+ | Identical functionality and pinout, but specified for push-pull active-low RESET output - incompatible with active-high reset receivers. | Cannot directly replace MAX6367HKA31+ without PCB-level redesign of reset signal routing and µP interface. | Choose MAX6367LKA31+ only when migrating legacy designs using active-low reset architecture and no BATT ON dependency. |
Compared with MAX6367PKA31+ and MAX6367LKA31+, the MAX6367HKA31+ uniquely delivers open-drain active-high RESET with integrated BATT ON - eliminating external logic for status indication while maintaining compatibility with modern µP reset architectures requiring high-assertion.
Availability
MAX6367HKA31+ is available at Aetrix Electronics and suitable for portable POS equipment, industrial PLCs, set-top boxes, and medical data loggers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6367HKA31+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and computing applications.
The MAX6365–MAX6368 family was designed specifically for µP system supervision with integrated battery backup, chip-enable gating, and variant-specific functions (BATT ON, watchdog, manual reset) - targeting space-constrained, low-power embedded systems.
FAQ
What is the exact reset threshold voltage for MAX6367HKA31+?
The MAX6367HKA31+ has a factory-set reset threshold of 3.00V (min), 3.08V (typ), and 3.15V (max) at +25°C, with guaranteed performance across −40°C to +85°C. This 3.08V nominal value targets reliable detection of brownout on standard 3.3V power rails, and the tight ±0.07V tolerance ensures consistent behavior without calibration.
Does MAX6367HKA31+ support battery backup for both VCC and BATT simultaneously?
No. The MAX6367HKA31+ does not support simultaneous VCC and BATT sourcing. When VCC is present and above the reset threshold, OUT is sourced exclusively from VCC. Only when VCC falls below VTH and VBATT exceeds VCC by at least 20mV does the internal switch connect BATT to OUT - ensuring clean, glitch-free switchover without backfeeding.
Can MAX6367HKA31+ drive an LED directly using the BATT ON pin?
Yes. The BATT ON pin of MAX6367HKA31+ is a push-pull output capable of sinking 60mA at 0.4V saturation. It can directly drive standard 20mA LEDs with a series resistor (e.g., 150Ω for 5V supply), providing immediate visual indication of battery-backup mode without additional driver circuitry.
What is the purpose of the CE IN and CE OUT pins on MAX6367HKA31+?
The CE IN and CE OUT pins implement hardware-based chip-enable gating. During normal operation, CE IN passes through to CE OUT with 1.5ns delay. When reset asserts, CE OUT is held low for 12µs to complete pending memory cycles, then disconnected - preventing erroneous writes to SRAM during power failure. This eliminates software-level memory protection overhead.
Is MAX6367HKA31+ compatible with 1.8V microprocessors?
Yes. The MAX6367HKA31+ operates from VCC = 1.2V to 5.5V and guarantees RESET/RESET validity down to 1.2V. Its 3.08V reset threshold is intended for 3.3V systems, but the device itself functions correctly with 1.8V VCC - provided the monitored rail (e.g., 3.3V) is supplied separately to VCC, and OUT is used to power 1.8V logic via appropriate level-shifting or regulation.
MAX6367HKA31+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX6367HKA31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6367HKA31+ 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+ reliable?
The price and inventory of MAX6367HKA31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6367HKA31+ is usually 5 days.
3.What payment methods are accepted for MAX6367HKA31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6367HKA31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6367HKA31+?
MAX6367HKA31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6367HKA31+ 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+?
For technical support, including MAX6367HKA31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6367HKA31+ requirements.
6.How does Aetrix verify that MAX6367HKA31+ is sourced from the original manufacturer or authorized distributors?
All MAX6367HKA31+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6367HKA31+?
All MAX6367HKA31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6367HKA31+, 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+ part is unused and in its original packaging.
Return procedure for MAX6367HKA31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6367HKA31+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
