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Analog Devices Inc./Maxim Integrated MAX6328UR23+G65
- Part No.:
- MAX6328UR23+G65
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6328UR23+G65.pdf
- Description:
- 3PIN, ULTRA-LOW-POWER SOT MICROP
- Quantity:
- Payment:
- Shipping:
Inventory:8,808
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Product details
Overview
MAX6328UR23+G65 from Maxim Integrated is an ultra-low-power, open-drain, active-low microprocessor supervisory circuit designed to monitor 2.32V power supplies and assert a reset signal during brownout or power-up conditions. It features a factory-trimmed 2.32V reset threshold (±1.5% at +25°C), 100ms minimum reset timeout after VCC recovery, 1µA max supply current at +25°C, and operates across –40°C to +85°C. It is used in portable battery-powered systems requiring reliable power-on reset with minimal quiescent current.
For engineers reviewing the MAX6328UR23+G65 datasheet, MAX6328UR23+G65 pinout, MAX6328UR23+G65 application, or MAX6328UR23+G65 equivalent, key selection criteria include its open-drain active-low RESET output, SOT23-3 package compatibility, 2.32V threshold precision over temperature, transient immunity against sub-200µs VCC glitches, and pin compatibility with legacy MAX803/MAX809 series supervisors.
Technical Context
The MAX6328UR23+G65 implements a precision bandgap-based voltage comparator with hysteresis (9.5mV typical) to detect VCC falling below 2.32V. Its internal timing circuit guarantees ≥100ms reset assertion after VCC rises above threshold, independent of supply ramp rate.
It uses an open-drain RESET output requiring an external pull-up resistor, enabling bidirectional reset interfacing with µPs like the Motorola 68HC11. The device remains functional down to VCC = 1V and rejects fast transients via built-in noise immunity - validated up to 100V/µs dV/dt on VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±1.5% at +25°C; ensures reliable detection of 2.32V supply brownout before system instability |
| Supply Current | 1µA max at +25°C; enables multi-year battery life in always-on portable instrumentation |
| Reset Timeout | ≥100ms after VCC rise; meets JEDEC JESD8-12B power-on reset hold-time requirements |
| Operating Temp | –40°C to +85°C; qualified for industrial and automotive under-hood environments |
| VCC Range | 1.0V to 5.5V; supports operation during deep brownout and full 5V logic systems |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and bidirectional µP reset control |
| Tempco | 40ppm/°C; limits threshold drift to <15mV over full temperature range, preserving margin |
Pinout & Package
MAX6328UR23+G65 is housed in a RoHS-compliant, lead-free SOT23-3 package (3.0mm × 1.7mm × 1.3mm), optimized for high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output stage; must be low-impedance to avoid false resets |
| 2 - RESET | Open-drain active-low reset output | Drives low during fault; requires external pull-up (typically 10–100kΩ) to host VCC or separate rail |
| 3 - VCC | Power supply input | Monitored voltage source; also powers internal circuitry; accepts 1.0V–5.5V with no external components |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max ensures <1% annual battery drain in coin-cell–powered IoT sensors |
| Factory-trimmed VTH | 2.32V threshold set at wafer test - eliminates field calibration and external resistors |
| Transient immunity | Rejects VCC glitches ≤200µs (at 200mV overdrive), preventing spurious resets in noisy ECU environments |
| No external components | Self-contained reset generation - reduces BOM count, layout area, and qualification effort |
| SOT23-3 footprint | Direct drop-in replacement for MAX803/809/810 - leverages existing PCB land patterns |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 2.32V LDO output; asserts RESET until regulated rail stabilizes post-battery insertion or wake-up. Use Value: 1µA max ICC extends usable battery life beyond 2 years; open-drain output interfaces cleanly with BLE SoC's bidirectional reset pin. |
Use Scenario: DIN-rail mounted analog input module exposed to 24V DC supply ripple and EFT bursts. IC Role / Device Role / Timing Role: Monitors local 3.3V logic rail derived from switching regulator; holds µC in reset during line dips >100ms. Use Value: 40ppm/°C tempco maintains 2.32V threshold accuracy across –25°C to +70°C cabinet temperatures; immune to 50ns transients per IEC 61000-4-4. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Low-voltage wake-up circuit in door module powered by vehicle battery (9–16V) with local 2.32V bias rail. IC Role / Device Role / Timing Role: Detects brownout during cranking (battery sag to ~9V); triggers controlled shutdown via µC reset assertion. Use Value: Guaranteed operation down to VCC = 1V allows supervision even during severe undervoltage; –40°C to +85°C rating meets AEC-Q100 Grade 3 requirements. |
Use Scenario: Revenue-grade meter with tamper-detection logic requiring deterministic power-on initialization. IC Role / Device Role / Timing Role: Generates clean, glitch-free reset pulse ≥100ms upon AC/DC converter startup to synchronize metrology ASIC and RTC. Use Value: Fixed 100ms timeout eliminates need for RC timing networks - improves production yield and long-term reliability vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR23+T | Same 2.32V threshold, push-pull active-low output; 1.2µA max ICC; SOT23-3 | Requires no pull-up resistor but cannot support wired-OR or bidirectional reset | Select when board already uses push-pull reset topology and lowest possible BOM cost is critical |
| TPS3808G12QDBVRQ1 | 2.32V threshold, open-drain active-low; 1.8µA max ICC; AEC-Q100 qualified; wider VCC range (up to 6.5V) | Higher ICC and automotive qualification add cost; not needed for commercial portable gear | Select only if AEC-Q100 compliance or >5.5V VCC tolerance is mandatory for the end application |
Compared with MAX809TR23+T, MAX6328UR23+G65 offers lower ICC and open-drain flexibility; compared with TPS3808G12QDBVRQ1, it provides tighter threshold tolerance (±1.5% vs. ±2%) and lower cost for non-automotive use - making it optimal for high-volume portable and industrial reset supervision.
Availability
MAX6328UR23+G65 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for MAX6328UR23+G65 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX6326/MAX6327/MAX6328 family was designed specifically for ultra-low-power microprocessor reset supervision in battery-critical and space-constrained applications - emphasizing precision threshold stability, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6328UR23+G65 and how tightly is it specified?
The MAX6328UR23+G65 has a factory-trimmed reset threshold of 2.32V, with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +85°C operating range. This value is laser-trimmed during wafer sort and verified per datasheet Table 1; the "R23" suffix explicitly denotes the 2.32V variant. No external calibration is required.
Does MAX6328UR23+G65 require an external pull-up resistor on the RESET pin?
Yes, MAX6328UR23+G65 features an open-drain active-low RESET output and requires an external pull-up resistor (typically 10kΩ to 100kΩ) to the host supply rail. This enables wired-OR configurations and bidirectional reset control - a key differentiator from push-pull alternatives like MAX809TR23+T.
What is the guaranteed minimum reset timeout duration for MAX6328UR23+G65 after VCC recovers?
MAX6328UR23+G65 guarantees a minimum reset timeout of 100ms after VCC rises above the 2.32V threshold. This is a monotonic, temperature-stable delay generated by an internal RC timer - fully specified from –40°C to +85°C and independent of VCC ramp rate or external components.
Can MAX6328UR23+G65 operate reliably at VCC levels below 2.32V?
Yes, MAX6328UR23+G65 remains fully functional and correctly asserts RESET down to VCC = 1.0V. Its internal circuitry is designed to maintain valid comparator and timing behavior across the entire 1.0V to 5.5V supply range - critical for brownout detection in deeply undervolted systems.
Is MAX6328UR23+G65 pin-compatible with older Maxim reset supervisors like MAX803 or MAX809?
Yes, MAX6328UR23+G65 uses the same SOT23-3 pinout (VCC, RESET, GND) and is explicitly documented as pin-compatible with MAX803/MAX809/MAX810. This allows direct replacement without PCB modification - provided the target design accommodates open-drain RESET behavior and associated pull-up resistor.
MAX6328UR23+G65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6328UR23+G65 FAQ
1.How can I place an order for MAX6328UR23+G65 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6328UR23+G65 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 MAX6328UR23+G65 reliable?
The price and inventory of MAX6328UR23+G65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6328UR23+G65 is usually 5 days.
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MAX6328UR23+G65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6328UR23+G65 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 MAX6328UR23+G65?
For technical support, including MAX6328UR23+G65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6328UR23+G65 requirements.
6.How does Aetrix verify that MAX6328UR23+G65 is sourced from the original manufacturer or authorized distributors?
All MAX6328UR23+G65 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 MAX6328UR23+G65 meets industry standards.
7.What is the process for return or replacement of MAX6328UR23+G65?
All MAX6328UR23+G65 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6328UR23+G65, 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 MAX6328UR23+G65 part is unused and in its original packaging.
Return procedure for MAX6328UR23+G65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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