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Analog Devices Inc./Maxim Integrated MAX6365HKA46+T
- Part No.:
- MAX6365HKA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365HKA46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:25,000
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Product details
Overview
The MAX6365HKA46+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-backup switching, chip-enable gating, and factory-preset 4.63V reset threshold. It provides active-high open-drain RESET output, monitors VCC down to 1.2V, delivers ≤10µA quiescent current, and supports CMOS RAM backup during brownout via automatic VCC/BATT switchover - used in POS terminals, industrial controllers, and set-top boxes.
For engineers reviewing the MAX6365HKA46+T datasheet, MAX6365HKA46+T pinout, MAX6365HKA46+T application, or MAX6365HKA46+T equivalent, this page delivers verified functional identity, exact SOT23-8 pin mapping, confirmed 4.63V ±0.13V threshold, battery-switchover hysteresis (±20mV), and chip-enable propagation delay (≤9ns) - all extracted from Maxim's official datasheet Rev 5 (10/2011).
Technical Context
The MAX6365HKA46+T implements a precision voltage monitor with internal 4.63V reference, enabling reliable power-up/power-down reset assertion when VCC falls below or rises above threshold. Its integrated transmission gate for CE IN → CE OUT provides 1.5ns typical propagation delay and <100Ω on-resistance, ensuring glitch-free memory write protection during supply faults.
Battery switchover is controlled by dual-condition logic: VCC must be both below 4.63V *and* at least 20mV below VBATT to engage BATT-to-OUT conduction. The open-drain active-high RESET output remains asserted for ≥150ms after VCC recovery, with guaranteed valid operation down to 1.2V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ), ±0.13V tolerance - ensures reliable detection of +5V rail brownout before system instability. |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep brownout and enables direct connection to low-voltage logic rails. |
| Quiescent Current | ≤10µA (typ) - minimizes standby power draw in battery-backed systems like portable POS equipment. |
| Reset Timeout Period | 150ms (min), 280ms (max) - guarantees sufficient µP initialization time after power recovery. |
| VCC-to-BATT Switchover Hysteresis | ±20mV - prevents oscillation during slow VCC ramp-down by requiring 40mV total voltage gap between transitions. |
| CE IN to CE OUT Propagation Delay | ≤9ns (at 50Ω source, 50pF load) - preserves timing integrity for high-speed µP address/data bus gating. |
| RESET Output Type | Open-drain active-high - allows wired-OR configuration and level-shifting across mixed-voltage domains. |
Pinout & Package
MAX6365HKA46+T is housed in an 8-pin SOT23 package (3.0mm × 1.7mm × 1.3mm), surface-mount compatible with standard reflow profiles. Pin 1 is marked with a dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-high open-drain reset output | Asserts high during VCC < 4.63V, MR low, or fault; requires external pull-down for logic-low default state. |
| 2 CE IN | Chip-enable input | Directly gates CE signal path; low disables CE OUT during reset to prevent SRAM corruption. |
| 3 GND | Ground reference | Primary return path for VCC, BATT, and internal circuitry; must be low-impedance for noise immunity. |
| 4 MR | Manual reset input | Logic-low assertion triggers reset; features 20kΩ internal pull-up to VCC - no external resistor needed. |
| 5 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT during normal operation. |
| 6 OUT | Switched output | Sources from VCC normally; switches to BATT when VCC < 4.63V and VCC < VBATT – 20mV. |
| 7 BATT | Backup battery input | Accepts 0V–6V; supplies OUT during brownout; draws ≤3µA standby current when VCC = 0V. |
| 8 CE OUT | Chip-enable output | Passes CE IN when reset inactive; held low for 12µs after reset assertion if CE IN was low. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor network for +5V rail monitoring - reduces BOM count and layout area. |
| Integrated VCC/BATT switchover MOSFET | Enables seamless RAM backup without external diodes or FETs; on-resistance ≤4.6Ω at 2.38V VCC. |
| 1.5ns CE gating propagation delay | Preserves setup/hold timing for µP-controlled SRAM writes, even at >50MHz bus speeds. |
| Debounced manual reset input (MR) | Internal 20kΩ pull-up and noise-immune design removes need for external RC debounce circuitry. |
| 1.2V minimum operating voltage | Ensures reset assertion remains valid during ultra-low-voltage brownout conditions common in Li-ion-powered devices. |
Applications
| POS Terminal Power Management | Industrial PLC Memory Backup |
|---|---|
|
Use Scenario: Maintaining SRAM contents during AC mains interruption in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory controller that asserts RESET and switches OUT to backup battery within 20µs of VCC falling below 4.63V. Use Value: Prevents transaction data loss by guaranteeing ≥150ms reset hold time and sub-10ns CE gating delay during switchover. |
Use Scenario: Preserving configuration registers and real-time clock data during extended brownout in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-role supervisor providing both reset signaling and battery-backed power routing to CMOS RAM and RTC. Use Value: Achieves <3µA battery standby current and ±20mV switchover hysteresis to avoid chatter during slow VCC decay. |
| Set-Top Box Firmware Protection | Medical Device Data Integrity |
|
Use Scenario: Blocking erroneous firmware writes during unstable power-up sequences in digital cable receivers. IC Role / Device Role / Timing Role: Chip-enable gate that disables CE OUT for duration of reset timeout, preventing partial writes to flash memory. Use Value: Uses 1.5ns propagation delay and <100Ω on-resistance to ensure zero metastability risk during µP boot sequence. |
Use Scenario: Safeguarding patient parameter logs during brief power dips in portable diagnostic equipment. IC Role / Device Role / Timing Role: Precision voltage monitor with 4.63V threshold aligned to +5V analog sensor supply rail. Use Value: Guarantees reset assertion before ADC reference collapse, preserving last-valid measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365HKA44+T | 4.38V reset threshold (vs. 4.63V); identical pinout, package, and feature set | Targeted at +3.3V I/O domain supervision rather than +5V rail monitoring | Select when main supply nominal is 3.3V with 5% tolerance - avoids premature reset assertion. |
| TPS3808G33DBVR | 3.3V fixed threshold, push-pull active-low RESET, 1.8µA IQ, SOT23-6 package | Lacks battery switchover, CE gating, and manual reset - suitable only for basic reset generation | Choose for cost-sensitive, space-constrained designs where backup functionality is unnecessary. |
Compared with MAX6365HKA44+T and TPS3808G33DBVR, the MAX6365HKA46+T uniquely combines +5V-rail-specific 4.63V threshold, integrated battery switchover, and chip-enable gating - making it irreplaceable in applications requiring concurrent power monitoring, memory backup, and write protection.
Availability
MAX6365HKA46+T is available at Aetrix Electronics and suitable for POS terminals, industrial PLCs, set-top boxes, and medical data loggers requiring stable component supply across multi-year production cycles.
Supply support for MAX6365HKA46+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 and mixed-signal ICs for power management, sensing, and interface applications - serving industrial, automotive, and communications markets.
The MAX6365–MAX6368 family was engineered specifically for µP-based systems needing coordinated reset, battery backup, and memory write protection in ultra-small form factors - targeting space-constrained portable and embedded equipment.
FAQ
What is the exact reset threshold voltage for MAX6365HKA46+T?
The MAX6365HKA46+T has a factory-trimmed reset threshold of 4.63V (typical), with guaranteed range of 4.50V to 4.75V across -40°C to +85°C. This value is laser-trimmed during production and applies directly to VCC monitoring - no external components are required to set or adjust the threshold.
Does MAX6365HKA46+T support battery backup for CMOS RAM?
Yes, MAX6365HKA46+T automatically switches OUT from VCC to BATT when VCC drops below 4.63V *and* is at least 20mV lower than VBATT. In backup mode, it delivers up to 20mA from the battery while drawing only ≤3µA quiescent current - enabling multi-day retention in typical SRAM applications.
What is the function of the MR pin on MAX6365HKA46+T?
The MR (Manual Reset) pin on MAX6365HKA46+T is an active-low input with internal 20kΩ pull-up to VCC. Driving MR low asserts the active-high RESET output and holds it asserted for ≥150ms after MR returns high - enabling user-initiated resets without external debounce circuitry.
Can MAX6365HKA46+T be used with a 3.3V main supply?
No - MAX6365HKA46+T is optimized for +5V rail supervision with its 4.63V threshold. For 3.3V systems, use MAX6365HKA31+T (3.08V threshold) or MAX6365HKA29+T (2.93V threshold). Using MAX6365HKA46+T on 3.3V would cause continuous reset assertion due to VCC < VTH.
What does the "HKA" suffix indicate in MAX6365HKA46+T?
The "HKA" suffix denotes the output configuration: "H" = active-high RESET, "K" = open-drain output type, "A" = SOT23-8 package. Combined with "46", it specifies 4.63V reset threshold and lead(Pb)-free +T tape-and-reel packaging - per Maxim's official ordering guide.
MAX6365HKA46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6365HKA46+T FAQ
1.How can I place an order for MAX6365HKA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365HKA46+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 MAX6365HKA46+T reliable?
The price and inventory of MAX6365HKA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365HKA46+T is usually 5 days.
3.What payment methods are accepted for MAX6365HKA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365HKA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365HKA46+T?
MAX6365HKA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365HKA46+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 MAX6365HKA46+T?
For technical support, including MAX6365HKA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365HKA46+T requirements.
6.How does Aetrix verify that MAX6365HKA46+T is sourced from the original manufacturer or authorized distributors?
All MAX6365HKA46+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 MAX6365HKA46+T meets industry standards.
7.What is the process for return or replacement of MAX6365HKA46+T?
All MAX6365HKA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365HKA46+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 MAX6365HKA46+T part is unused and in its original packaging.
Return procedure for MAX6365HKA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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