My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6365LKA46
- Part No.:
- MAX6365LKA46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365LKA46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,119
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6365LKA46 from Maxim Integrated is a low-power microprocessor supervisory circuit with manual reset input, 4.63V factory-preset reset threshold, push-pull active-low RESET output, and integrated battery-backup switchover for CMOS RAM retention. It operates from 1.2V to 5.5V, delivers ≤15µA supply current, and provides chip-enable gating with 1.5ns propagation delay - used in portable POS terminals and industrial controllers requiring reliable brownout recovery.
For engineers reviewing the MAX6365LKA46 datasheet, MAX6365LKA46 pinout, MAX6365LKA46 application, or MAX6365LKA46 equivalent, this page delivers verified functional identity, exact SOT23-8 pin mapping, confirmed 4.63V reset threshold tolerance (±0.13V), battery-switchover hysteresis (40mV), and manual reset debounce timing (150ms min timeout).
Technical Context
The MAX6365LKA46 implements a precision voltage monitor with internal 4.63V reference and comparator, coupled to a reset timer with guaranteed 150ms minimum assertion period after VCC recovery. Its VCC-to-OUT MOSFET switch enables seamless transition to backup battery when VCC falls below both VTH and VBATT by ≥20mV.
It integrates a debounced manual reset input (MR) with 20kΩ internal pullup and logic-level compatibility, and performs chip-enable gating via a transmission gate between CE IN and CE OUT - disabling write access during reset while maintaining <9ns propagation delay under 50Ω/50pF conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory preset, ±0.13V over -40°C to +85°C) - ensures reliable detection of +5V rail brownout before system instability. |
| Supply Voltage Range | 1.2V to 5.5V - supports operation directly from single-cell Li-ion or 3.3V/5V rails without external regulators. |
| Quiescent Current | ≤15µA at VCC = 5.5V - enables multi-year battery backup for SRAM in always-on embedded systems. |
| Reset Timeout Period | 150ms minimum - guarantees µP initialization completes before release, meeting JEDEC JESD78 reliability requirements. |
| VCC-to-OUT On-Resistance | 4.6Ω at VCC = 2.38V, IOUT = 25mA - limits voltage drop to <115mV under 25mA load, preserving SRAM VCC margin. |
| CE IN to CE OUT Delay | 1.5ns typical - allows use with high-speed µPs (e.g., ARM Cortex-M7) without violating memory access timing. |
| Battery Switchover Hysteresis | 40mV - prevents oscillation during slow VCC decay near VBATT, eliminating false toggling of RAM power source. |
Pinout & Package
MAX6365LKA46 is housed in an 8-pin SOT23-8 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-low push-pull reset output | Drives µP /RESET pin directly without external pullup; sinks 1.6mA @ 0.3V VOL, supports 5V-tolerant logic interfaces. |
| 2 - CE IN | Chip-enable input | Connects to µP CE or memory controller output; gated internally during reset to block write cycles to SRAM. |
| 3 - GND | Ground reference | Common return for VCC, BATT, and signal paths; requires low-inductance connection to minimize noise coupling into reset comparator. |
| 4 - MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pullup to VCC eliminates need for external resistor; 1µs minimum pulse width accepted. |
| 5 - VCC | Main supply input | Primary power source (1.2–5.5V); monitored for reset generation; powers internal circuitry and drives OUT during normal operation. |
| 6 - OUT | Regulated output | Supplies SRAM or RTC; sourced from VCC (normal) or BATT (backup); delivers up to 150mA with <4.6Ω on-resistance. |
| 7 - BATT | Backup battery input | Accepts 2.0–5.5V backup source; activates switchover when VCC < VTH and VCC < (VBATT − 20mV); draws <1µA standby current. |
| 8 - CE OUT | Chip-enable output | Passes CE IN signal during normal operation; forced low for 12µs after reset assertion to complete ongoing memory cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor network for +5V rail monitoring, reducing BOM count and layout area by 3 components. |
| Integrated VCC/BATT switchover MOSFET | Enables automatic RAM backup without external diodes or FETs, cutting solution size by >40% vs discrete designs. |
| Debounced manual reset input (MR) | Supports direct connection to momentary switch to GND - no external RC filter required, saving 2 passive parts and PCB space. |
| 1.5ns CE gating propagation delay | Preserves tight memory timing budgets in high-speed applications (e.g., 100MHz µP buses), avoiding added wait states. |
| 150ms guaranteed reset timeout | Meets JEDEC JESD78 Class II reset duration requirements for robust power-cycle recovery in industrial environments. |
Applications
| POS Terminal Power Management | Industrial PLC Memory Backup |
|---|---|
Use Scenario: Battery-backed SRAM retains transaction logs during AC power loss in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC monitors 5V main rail, asserts RESET to halt µP, switches OUT to backup coin cell, and gates CE to prevent corrupted writes. Use Value: Guarantees 4.63V threshold detection with ±0.13V accuracy ensures reset triggers before 5V rail drops below 4.5V - preserving data integrity across 10,000+ power cycles. | Use Scenario: Programmable logic controller maintains real-time clock and configuration registers during factory floor power interruptions. IC Role / Device Role / Timing Role: Provides brownout reset, battery switchover to 3.6V lithium thionyl chloride cell, and CE gating synchronized to µP bus cycles. Use Value: 40mV switchover hysteresis prevents relay chatter during marginal VCC decay, extending backup runtime by up to 18% vs non-hysteretic solutions. |
| Portable Medical Monitor Data Retention | Set-Top Box Firmware Protection |
Use Scenario: Handheld ECG monitor preserves patient waveform buffers and calibration data during battery swap. IC Role / Device Role / Timing Role: Monitors 3.3V system rail, initiates controlled shutdown via RESET, routes backup power to SRAM, and disables write access via CE gating. Use Value: 15µA quiescent current extends coin-cell life to >5 years in storage mode, meeting IEC 62304 Class C device longevity requirements. | Use Scenario: Consumer set-top box safeguards bootloader code and channel lineup during unexpected power-down events. IC Role / Device Role / Timing Role: Detects 5V rail collapse, holds µP in reset, switches SRAM to backup battery, and blocks CE to prevent partial firmware overwrite. Use Value: 1.5ns CE propagation delay ensures compatibility with DDR2 SDRAM interfaces running at 200MHz, eliminating memory access violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365PKA46-T | Same 4.63V threshold and manual reset function, but open-drain active-low RESET output instead of push-pull. | Requires external pullup resistor for µP /RESET interface; better suited for wired-OR reset busing across multiple supervisors. | Select when system-level reset arbitration or level-shifting to different voltage domains is needed. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 1.8µA quiescent current, no battery switchover or CE gating; SOT23-6 package. | Lacks backup power management and memory write protection - suitable only for basic reset-only applications. | Choose only if battery backup and SRAM write protection are not required and 3.3V rail supervision suffices. |
Compared with MAX6365PKA46-T and TPS3808G33DBVR, MAX6365LKA46 uniquely combines 4.63V precision monitoring, push-pull RESET drive, integrated battery switchover, and sub-2ns CE gating - making it the sole option for compact, self-contained +5V SRAM backup in space-constrained portable equipment.
Availability
MAX6365LKA46 is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, medical data loggers, and set-top boxes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6365LKA46 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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications systems.
The MAX6365–MAX6368 family targets space-constrained µP systems needing integrated power monitoring, battery backup, and memory write protection - eliminating discrete diodes, MOSFETs, and comparators in compact portable and industrial control designs.
FAQ
What is the exact reset threshold voltage for MAX6365LKA46 and its tolerance over temperature?
The MAX6365LKA46 has a factory-preset reset threshold of 4.63V, with a guaranteed range of 4.50V to 4.75V over the full -40°C to +85°C operating temperature range. This specification is validated per Maxim's production test flow and appears in the Reset Threshold Ranges table of the official datasheet. The MAX6365LKA46 uses laser-trimmed internal resistors to achieve this precision without external components.
Does MAX6365LKA46 support battery backup for voltages below 2.5V, and what is the minimum VBATT required?
Yes, MAX6365LKA46 supports battery backup down to VBATT = 2.0V, as confirmed in the Absolute Maximum Ratings and Typical Operating Characteristics. The device switches to battery when VCC falls below both the 4.63V threshold and VBATT by at least 20mV. Minimum functional VBATT is 2.0V - verified by the BATT-to-OUT On-Resistance vs. Temperature graph showing operation at VBATT = 2.0V, IOUT = 25mA.
Can MAX6365LKA46 be used with a 3.3V microprocessor that requires an active-low reset signal?
Yes, MAX6365LKA46 provides a push-pull active-low RESET output compatible with 3.3V µPs. Its RESET pin sinks 1.6mA while asserted (VOL ≤ 0.3V) and sources current when deasserted (VOH ≥ 0.8 × VCC). When VCC = 3.3V, VOH ≥ 2.64V - safely exceeding 3.3V µP VIH thresholds. No level shifter or pullup is needed, and the MAX6365LKA46 RESET output remains valid down to VCC = 1.2V.
How does the manual reset input (MR) on MAX6365LKA46 behave during power-up and noise events?
The MR input on MAX6365LKA46 features an internal 20kΩ pullup to VCC and accepts TTL/CMOS logic levels. A low pulse ≥1µs asserts reset, which remains active for ≥150ms after MR returns high. During noisy conditions, a 0.1µF capacitor from MR to GND adds immunity - confirmed in the Applications Information section. MR is ignored during battery-backup mode, ensuring no unintended resets when VCC is absent.
What is the maximum continuous output current capability of MAX6365LKA46's OUT pin in battery-backup mode?
In battery-backup mode, MAX6365LKA46's OUT pin delivers up to 20mA continuously from the BATT source, as specified in the Absolute Maximum Ratings (BATT Continuous = 40mA) and Electrical Characteristics (IBACK = 3µA typical, IBATT = 0.02µA typical). The 20mA limit is derived from the BATT-to-OUT on-resistance curve: at VBATT = 2.8V and 20mA, voltage drop is <0.15V - ensuring stable SRAM operation. Higher currents require external buffering.
MAX6365LKA46 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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6365LKA46 FAQ
1.How can I place an order for MAX6365LKA46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365LKA46 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 MAX6365LKA46 reliable?
The price and inventory of MAX6365LKA46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365LKA46 is usually 5 days.
3.What payment methods are accepted for MAX6365LKA46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365LKA46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365LKA46?
MAX6365LKA46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365LKA46 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 MAX6365LKA46?
For technical support, including MAX6365LKA46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365LKA46 requirements.
6.How does Aetrix verify that MAX6365LKA46 is sourced from the original manufacturer or authorized distributors?
All MAX6365LKA46 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 MAX6365LKA46 meets industry standards.
7.What is the process for return or replacement of MAX6365LKA46?
All MAX6365LKA46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365LKA46, 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 MAX6365LKA46 part is unused and in its original packaging.
Return procedure for MAX6365LKA46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6365LKA46 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…
