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Analog Devices Inc./Maxim Integrated MAX6365PKA31-T
- Part No.:
- MAX6365PKA31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365PKA31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,374
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Product details
Overview
MAX6365PKA31-T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup, chip-enable gating, and debounced manual reset input. It monitors VCC supply (1.2V–5.5V), asserts active-low open-drain RESET when VCC falls below 3.08V (typ), switches OUT between VCC and backup battery with <40mV hysteresis, and gates CE signals with 1.5ns propagation delay-used in portable POS terminals and industrial controllers requiring reliable power-fail response.
For engineers reviewing the MAX6365PKA31-T datasheet, MAX6365PKA31-T pinout, MAX6365PKA31-T application, or MAX6365PKA31-T equivalent, key selection criteria include factory-trimmed 3.08V reset threshold, 8-pin SOT23 package, 150ms minimum reset timeout, 10µA quiescent current, and integrated VCC-to-BATT switchover control for CMOS RAM retention during brownout.
Technical Context
The MAX6365PKA31-T implements a precision voltage monitor with ±1.5% threshold accuracy over –40°C to +85°C, combined with an internal transmission gate for CE IN/CE OUT signal gating. Its reset generator guarantees valid RESET output down to 1.2V on either VCC or VBATT, and its battery switchover logic enforces dual conditions: VCC < VTH and VCC < VBATT – 20mV before engaging backup mode.
Unlike generic supervisors, it integrates a 20kΩ internal MR pullup, debounces manual reset inputs without external components, and maintains CE OUT low for 12µs after CE IN goes low during reset assertion-ensuring SRAM write completion before isolation. The device operates with no external timing components and requires only a 0.1µF VCC bypass capacitor for transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V to 3.15V (min/typ/max); factory-trimmed for stable 3.08V trigger at +25°C, ±1.5% over temperature |
| Reset Timeout Period | 150ms min; ensures µP completes power-up initialization before release |
| Supply Current | 10µA typ at VCC = 5.5V; enables multi-year battery life in backup mode |
| VCC Operating Range | 1.2V to 5.5V; supports modern low-voltage µPs and retains RESET validity down to 1.2V |
| Output Type | Open-drain active-low RESET; compatible with wired-OR bus architectures and level-shifting interfaces |
| Battery Switchover Hysteresis | ±20mV; prevents oscillation during slow VCC decay near VBATT |
| CE Propagation Delay | 1.5ns typ; preserves high-speed memory access timing in µP systems |
Pinout & Package
MAX6365PKA31-T is housed in an 8-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead(Pb)-free compatible (RoHS-compliant), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low open-drain reset output | Asserts low continuously during VCC undervoltage, MR low, or brownout; holds for ≥150ms after recovery |
| 2 CE IN | Chip-enable input | Directly controls CE OUT gating; tied to GND or OUT if unused; 20kΩ internal pullup not applied |
| 3 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance connection to system ground plane |
| 4 MR | Manual reset input | Debounced logic input with 20kΩ internal pullup to VCC; low pulse ≥1µs triggers reset |
| 5 VCC | Main supply input | Primary power source (1.2V–5.5V); powers internal circuitry and supplies OUT during normal operation |
| 6 OUT | Regulated output | Sources from VCC (≤150mA) or BATT (≤40mA) depending on switchover state; powers SRAM or real-time clock |
| 7 BATT | Backup battery input | Accepts 2.0V–5.5V battery; engages only when VCC < VTH and VCC < VBATT – 20mV |
| 8 CE OUT | Chip-enable output | Gated version of CE IN; disabled during reset to prevent erroneous SRAM writes; actively pulled up to OUT |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V (typ) with ±1.5% tolerance over temperature-eliminates external resistor networks for precision monitoring |
| Integrated CE signal gating | 1.5ns propagation delay and <100Ω on-resistance-enables direct interface with high-speed µPs without timing degradation |
| Debounced manual reset input | 20kΩ internal pullup and noise-immune detection-removes need for external RC debounce or Schmitt-trigger buffers |
| Battery switchover control | Automatic VCC/BATT selection with 40mV hysteresis-ensures glitch-free RAM power transition during brownout |
| Ultra-low quiescent current | 10µA typical supply current-extends battery life in always-on backup applications beyond 5 years |
Applications
| POS Terminal Power Management | Industrial PLC Memory Protection |
|---|---|
Use Scenario: Battery-backed point-of-sale terminal maintaining transaction log integrity during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET to halt µP execution and gating CE to freeze SRAM writes while switching OUT to backup battery. Use Value: Prevents data corruption by isolating memory during power transition and guaranteeing 150ms reset hold time for safe µP shutdown. | Use Scenario: Programmable logic controller retaining configuration and I/O state during factory mains interruption. IC Role / Device Role / Timing Role: Voltage monitor triggering controlled reset and enabling seamless VCC-to-BATT switchover for CMOS RAM and RTC. Use Value: Eliminates external MOSFETs and discrete logic, reducing BOM count while ensuring <12µs CE OUT hold time for write completion. |
| Portable Medical Device Backup | Set-Top Box Real-Time Clock Hold |
Use Scenario: Handheld diagnostic instrument preserving calibration data and session logs during battery swap. IC Role / Device Role / Timing Role: Low-quiescent supervisor managing VCC dropout detection, MR-initiated reset, and automatic BATT engagement. Use Value: 10µA backup-mode current extends primary battery life; 1.2V operating capability supports aging Li-ion cells down to end-of-discharge. | Use Scenario: Consumer set-top box maintaining accurate time and channel settings across overnight power cycles. IC Role / Device Role / Timing Role: Reset generator and battery switchover controller powering RTC and nonvolatile registers from coin cell. Use Value: Factory-trimmed 3.08V threshold matches 3.3V rail tolerance; 40mV hysteresis prevents false switching during line ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365HKA31-T | Same reset threshold (3.08V) and function set, but push-pull active-low RESET output instead of open-drain | Requires no external pullup resistor; unsuitable for wired-OR bus configurations | Select when driving single-load RESET lines and minimizing external components |
| TPS3808G33DBVR | 3.3V reset threshold (not 3.08V); 350ms reset timeout; no integrated CE gating or battery switchover | Lacks battery backup control and memory write protection-requires external MOSFET and logic for same functionality | Select only for basic reset-only applications where CE gating and BATT management are handled externally |
Compared with MAX6365HKA31-T and TPS3808G33DBVR, the MAX6365PKA31-T uniquely combines 3.08V precision reset, open-drain RESET compatibility, integrated CE gating, and autonomous battery switchover in a single 8-pin SOT23-reducing solution size by >40% versus discrete alternatives.
Availability
MAX6365PKA31-T is available at Aetrix Electronics and suitable for portable POS equipment, industrial PLCs, medical handhelds, and set-top boxes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6365PKA31-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 demanding industrial, automotive, and computing applications.
The MAX6365–MAX6368 family delivers integrated power-supply supervision, battery backup control, and memory write protection in ultra-small packages-targeting space-constrained µP systems needing high reliability under brownout and power-fail conditions.
FAQ
What is the exact reset threshold voltage for MAX6365PKA31-T?
The MAX6365PKA31-T has a factory-trimmed reset threshold of 3.00V (min), 3.08V (typ), and 3.15V (max) over –40°C to +85°C. This 3.08V nominal value is laser-trimmed during production and specified with ±1.5% accuracy, making it suitable for monitoring 3.3V rails with margin. The "31" suffix in the part number directly encodes this threshold range per Maxim's ordering guide.
Does MAX6365PKA31-T support battery backup for CMOS RAM?
Yes, MAX6365PKA31-T provides fully autonomous battery backup for CMOS RAM. When VCC drops below 3.08V and falls 20mV below VBATT, it automatically switches OUT from VCC to the backup battery source. In backup mode, it delivers up to 40mA from VBATT while consuming only 3µA quiescent current, preserving battery life for years in standby.
What is the function of the CE IN and CE OUT pins on MAX6365PKA31-T?
CE IN and CE OUT implement hardware-enforced memory write protection. During normal operation, CE IN passes directly to CE OUT with 1.5ns propagation delay. When RESET asserts, CE OUT is immediately gated off-preventing spurious writes to SRAM during power instability. If CE IN is low when reset starts, CE OUT stays low for 12µs to complete ongoing memory access before isolation.
Can MAX6365PKA31-T operate with a 1.2V supply?
Yes, MAX6365PKA31-T operates from 1.2V to 5.5V on VCC or VBATT. Its internal circuits-including RESET output, CE gating, and voltage monitor-remain fully functional and specified down to 1.2V. This enables use with ultra-low-voltage µPs and extends operational life with aging batteries whose voltage sags below 2.0V.
Is an external pullup resistor required for the RESET pin of MAX6365PKA31-T?
No, an external pullup resistor is not required for the RESET pin of MAX6365PKA31-T because it features an open-drain active-low output architecture designed for wired-OR bus interfacing. The RESET pin sinks current when asserted (low) and floats when inactive (high), allowing system-level pullup to any compatible voltage rail-no on-die or external pullup is needed for basic operation.
MAX6365PKA31-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 Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6365PKA31-T FAQ
1.How can I place an order for MAX6365PKA31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365PKA31-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 MAX6365PKA31-T reliable?
The price and inventory of MAX6365PKA31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365PKA31-T is usually 5 days.
3.What payment methods are accepted for MAX6365PKA31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365PKA31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365PKA31-T?
MAX6365PKA31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365PKA31-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 MAX6365PKA31-T?
For technical support, including MAX6365PKA31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365PKA31-T requirements.
6.How does Aetrix verify that MAX6365PKA31-T is sourced from the original manufacturer or authorized distributors?
All MAX6365PKA31-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 MAX6365PKA31-T meets industry standards.
7.What is the process for return or replacement of MAX6365PKA31-T?
All MAX6365PKA31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365PKA31-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 MAX6365PKA31-T part is unused and in its original packaging.
Return procedure for MAX6365PKA31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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