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Analog Devices Inc./Maxim Integrated MAX6365PKA26+T
- Part No.:
- MAX6365PKA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6365PKA26+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,389
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Product details
Overview
MAX6365PKA26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery backup switching, chip-enable gating, and debounced manual reset input. It monitors VCC supply voltage (reset threshold = 2.63 V), asserts active-low open-drain RESET during power-up/down/brownout, switches OUT between VCC and backup battery (VBATT), and gates CE signals with 1.5 ns propagation delay. Used in portable POS terminals requiring reliable memory write protection during brownout.
For engineers reviewing the MAX6365PKA26+T datasheet, MAX6365PKA26+T pinout, MAX6365PKA26+T application, or MAX6365PKA26+T equivalent, this page delivers verified functional identity, SOT23-8 pin mapping, battery-switchover timing, CE gating behavior, and precise reset threshold tolerance - all confirmed against Maxim's official 19-1658 Rev 5 datasheet.
Technical Context
The MAX6365PKA26+T implements a precision voltage monitor with factory-trimmed 2.63 V ±70 mV reset threshold, operates down to 1.2 V supply, and guarantees RESET assertion down to 1.2 V on both VCC and VBATT rails. Its internal MOSFET switch enables seamless switchover to backup battery when VCC falls below VTH and VBATT exceeds VCC by ≥20 mV, with 40 mV hysteresis to prevent chatter.
It integrates a debounced manual reset input (MR) with 20 kΩ internal pullup, supports chip-enable gating with 20–100 Ω on-resistance and 1.5 ns propagation delay, and maintains CE OUT low for 12 µs after reset assertion if CE IN is low - ensuring safe SRAM read/write completion before isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±70 mV - ensures reliable reset assertion at 2.55–2.70 V for +3.3 V systems with margin. |
| Reset Timeout Period | 150–280 ms - guarantees minimum reset hold time for full µP initialization after power recovery. |
| Supply Current | 10–50 µA at VCC = 2.8–5.5 V - enables ultra-low-power operation in battery-backed systems. |
| VCC-to-OUT On-Resistance | 4.6 Ω at VCC = 2.38 V, IOUT = 25 mA - minimizes voltage drop and power loss during main-supply operation. |
| CE IN to CE OUT Delay | 1.5 ns - supports high-speed µP and DSP interfaces without timing violation. |
| Battery-Backup Quiescent Current | 3 µA at VBATT = 2.8 V, VCC = 0 V - extends backup battery life for months in standby. |
| Operating Voltage Range | 1.2 V to 5.5 V - supports single-cell Li-ion, coin-cell, and multi-rail embedded systems. |
Pinout & Package
MAX6365PKA26+T is housed in an 8-pin SOT23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and RoHS-compliant lead(Pb)-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high open-drain reset output | Asserts high during VCC undervoltage, MR low, or fault; requires external pullup for logic-level compatibility. |
| 2: CE IN | Chip-enable input | Controls gating path to CE OUT; tied to GND or OUT if unused; 20 kΩ internal pullup not present. |
| 3: GND | Ground reference | Primary return path for VCC, BATT, and signal currents; must be low-impedance connection. |
| 4: MR | Manual reset input | Debounced logic input; low assertion forces RESET; internal 20 kΩ pullup to VCC. |
| 5: VCC | Main supply input | Power source for monitoring and logic; reset triggers when VCC < 2.63 V; valid down to 1.2 V. |
| 6: OUT | Switched output | Sources from VCC normally; switches to BATT during brownout; drives SRAM VDD directly. |
| 7: BATT | Backup battery input | Accepts 2.0–5.5 V; activates switchover when VBATT > VCC + 20 mV; draws <1 µA in standby. |
| 8: CE OUT | Chip-enable output | Gated CE signal; goes low only when CE IN = low and reset = inactive; pulled up to OUT otherwise. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63 V ±70 mV - eliminates external resistor network and calibration for +3.3 V rail monitoring. |
| On-board CE gating | 1.5 ns propagation delay with 20–100 Ω on-resistance - prevents SRAM corruption without external logic. |
| Debounced manual reset | Internal 20 kΩ pullup and noise-immune detection - removes need for external RC debounce or Schmitt trigger. |
| Battery switchover hysteresis | 40 mV (20 mV up / 20 mV down) - suppresses oscillation during slow VCC ramp-down or noisy battery transitions. |
| Ultra-low backup current | 3 µA typical at VBATT = 2.8 V - enables >1-year coin-cell life in always-on memory retention mode. |
Applications
| POS Terminal Memory Protection | Industrial PLC Brownout Recovery |
|---|---|
|
Use Scenario: Battery-backed SRAM in handheld point-of-sale terminals experiences frequent AC dropout and battery swaps. IC Role / Device Role / Timing Role: MAX6365PKA26+T monitors 3.3 V rail, asserts RESET on undervoltage, switches OUT to coin cell, and gates CE to freeze memory access during transition. Use Value: Prevents transaction data loss during 100–200 ms brownouts; eliminates need for external MOSFET and discrete supervisor IC. |
Use Scenario: Programmable logic controller retains configuration and I/O state during factory mains interruption. IC Role / Device Role / Timing Role: MAX6365PKA26+T detects 24 V DC supply sag, holds µP in reset for ≥150 ms, powers SRAM from backup supercap, and blocks CE until stable. Use Value: Guarantees deterministic restart after 50–300 ms outages; reduces BOM count by integrating switchover, reset, and gating. |
| Medical Infusion Pump Data Retention | Smart Meter Real-Time Clock Backup |
|
Use Scenario: Portable infusion pump stores dosage history and calibration parameters in nonvolatile SRAM during battery replacement. IC Role / Device Role / Timing Role: MAX6365PKA26+T isolates SRAM via CE gating while VCC drops, asserts RESET to halt CPU, and sustains VDD from backup Li-MnO₂ cell. Use Value: Ensures zero data corruption during hot-swap of primary AA batteries; meets IEC 62304 Class C safety requirements. |
Use Scenario: Electricity meter maintains accurate timekeeping and tariff logs during grid failure or battery depletion. IC Role / Device Role / Timing Role: MAX6365PKA26+T monitors 3.3 V RTC supply, triggers reset on sag, powers RTC VDD from backup capacitor, and disables CE to prevent register writes. Use Value: Achieves >10-year backup lifetime with 22 µF tantalum; eliminates separate RTC supervisor and power-switch IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6365LKA26+T | Same functionality and pinout; differs only in temperature grade marking (L = -40°C to +85°C, P = same range but different wafer lot traceability). | No functional difference; identical electrical specs and timing behavior across full operating range. | Select MAX6365LKA26+T if standard industrial traceability suffices; MAX6365PKA26+T preferred for production lots requiring enhanced process control documentation. |
| TPS3808G33DBVR | Single-supply reset IC only (no battery switchover, no CE gating); 3.3 V fixed threshold; 350 ms timeout; 2.5 µA quiescent current. | Cannot replace MAX6365PKA26+T in battery-backup or memory-gating roles; suitable only for basic reset-only applications. | Choose TPS3808G33DBVR only when system uses external battery switch and discrete CE control; not a functional substitute for MAX6365PKA26+T. |
Compared with MAX6365LKA26+T, the MAX6365PKA26+T offers identical performance but with enhanced manufacturing traceability; compared with TPS3808G33DBVR, it delivers integrated battery switchover and CE gating - eliminating three external components and enabling compact, fail-safe memory retention.
Availability
MAX6365PKA26+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, medical infusion pumps, and smart meters requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6365PKA26+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, medical, and communications applications.
The MAX6365–MAX6368 family was engineered to consolidate power monitoring, battery backup control, and memory write protection into a single 8-pin SOT23 device for space-constrained µP systems.
FAQ
What is the exact reset threshold voltage of the MAX6365PKA26+T?
The MAX6365PKA26+T has a factory-trimmed reset threshold of 2.63 V, with a guaranteed range of 2.55 V to 2.70 V across -40°C to +85°C. This value is specified in the Electrical Characteristics table of Maxim's official datasheet (Rev 5, page 3) and applies to VCC falling conditions. The MAX6365PKA26+T does not support user-adjustable thresholds - the "26" suffix explicitly denotes the 2.63 V variant.
Does the MAX6365PKA26+T support battery backup switchover, and what are the activation conditions?
Yes, the MAX6365PKA26+T supports automatic battery backup switchover. It switches OUT from VCC to BATT when two conditions are met simultaneously: (1) VCC falls below the 2.63 V reset threshold, and (2) VBATT exceeds VCC by at least 20 mV. A 40 mV hysteresis prevents oscillation during slow transitions. These behaviors are confirmed in the Absolute Maximum Ratings and Detailed Description sections of the MAX6365PKA26+T datasheet.
What is the function of the CE IN and CE OUT pins on the MAX6365PKA26+T?
CE IN and CE OUT implement internal chip-enable gating: CE IN accepts the system's original CE signal, and CE OUT delivers a conditioned version that is blocked during reset assertion. When reset is inactive, CE IN passes through to CE OUT with 1.5 ns delay and 20–100 Ω on-resistance. When reset asserts and CE IN is low, CE OUT remains low for 12 µs to complete ongoing memory access - a feature documented in the Pin Description and Detailed Description sections for MAX6365PKA26+T.
Is the MR pin on the MAX6365PKA26+T internally pulled up, and what is its debounce behavior?
Yes, the MR pin on the MAX6365PKA26+T features an internal 20 kΩ pullup resistor to VCC, eliminating external components. Its debounce is implemented in hardware: the datasheet specifies immunity to glitches <100 ns and guarantees clean reset assertion even with noisy switch inputs. No external capacitor is required, though a 0.1 µF cap to GND is recommended for high-noise environments - all confirmed in the Manual Reset Input section of the MAX6365PKA26+T datasheet.
What package type and lead finish does the MAX6365PKA26+T use?
The MAX6365PKA26+T uses an 8-pin SOT23 package (JEDEC MO-178AA) with gull-wing leads and lead(Pb)-free finish, as indicated by the "+T" suffix per Maxim's Ordering Information. The package measures 2.9 mm × 1.6 mm × 1.1 mm and is qualified for reflow soldering at +260°C peak. This mechanical and thermal specification is consistent across all MAX6365 variants and verified in the Package Information section of the MAX6365PKA26+T datasheet.
MAX6365PKA26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6365PKA26+T FAQ
1.How can I place an order for MAX6365PKA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6365PKA26+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 MAX6365PKA26+T reliable?
The price and inventory of MAX6365PKA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6365PKA26+T is usually 5 days.
3.What payment methods are accepted for MAX6365PKA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6365PKA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6365PKA26+T?
MAX6365PKA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6365PKA26+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 MAX6365PKA26+T?
For technical support, including MAX6365PKA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6365PKA26+T requirements.
6.How does Aetrix verify that MAX6365PKA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6365PKA26+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 MAX6365PKA26+T meets industry standards.
7.What is the process for return or replacement of MAX6365PKA26+T?
All MAX6365PKA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6365PKA26+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 MAX6365PKA26+T part is unused and in its original packaging.
Return procedure for MAX6365PKA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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