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Analog Devices Inc./Maxim Integrated MAX6327XR23+
- Part No.:
- MAX6327XR23+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6327XR23+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
MAX6327XR23+ from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when voltage drops below 2.32V, holding reset active for ≥100ms after recovery; it operates from 1.2V to 5.5V over –40°C to +85°C and draws ≤1µA supply current, enabling reliable power-on/brownout reset in portable 3.3V embedded controllers.
For engineers reviewing the MAX6327XR23+ datasheet, MAX6327XR23+ pinout, MAX6327XR23+ application, or MAX6327XR23+ equivalent, this device delivers factory-trimmed 2.32V threshold with ±2.5% tempco across temperature, ultra-low quiescent current for battery longevity, and SC70-3 packaging compatible with space-constrained µP reset interfaces requiring active-high assertion.
Technical Context
The MAX6327XR23+ implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis to reject fast VCC transients while ensuring deterministic reset timing. Its push-pull output drives high (≥0.8·VCC at 500µA) during reset assertion and low (≤0.4V at 1.2mA) otherwise, eliminating external pull-up components.
Reset timeout is guaranteed ≥100ms after VCC rises above 2.32V, with typical delay of 185ms at +25°C and full specification over –40°C to +85°C. The device remains functional down to VCC = 1.2V and ignores transients <100µs at 200mV overdrive, per Maxim's transient immunity characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±2.5% over –40°C to +85°C - ensures stable brownout detection for 2.5V/3.3V systems without recalibration. |
| Supply Current | ≤1.0µA at VCC = 3.0V - enables multi-year operation on coin-cell batteries in portable instrumentation. |
| Reset Timeout | 100ms (min) to 280ms (max) - guarantees sufficient µP initialization time before release, meeting JEDEC JESD78 reliability requirements. |
| Output Type | Active-high push-pull - directly drives µP RESET pins without external pull-up, reducing BOM count and board area. |
| Operating Voltage | 1.2V to 5.5V - supports wide-input industrial and automotive subsystems powered from LDOs or DC-DC converters. |
| Tempco | 40ppm/°C - limits threshold drift to ±21mV over –40°C to +85°C, critical for precision reset in temperature-varying environments. |
| VCC Transient Immunity | Rejects ≤100µs negative glitches at 200mV overdrive - prevents spurious resets during switching noise or ESD events. |
Pinout & Package
MAX6327XR23+ is housed in a 3-pin SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Low-impedance return path for internal comparator and output stage; must be connected to system ground plane for noise immunity. |
| 2 (RESET) | Active-high reset output | Push-pull driver asserts HIGH during reset condition (VCC < 2.32V) and LOW otherwise; sinks 1.2mA or sources 500µA. |
| 3 (VCC) | Supply input | Power rail monitoring point; accepts 1.2V–5.5V; internal circuitry remains functional down to 1.2V for deep brownout detection. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed threshold | 2.32V with ±1.5% tolerance at +25°C - eliminates manual calibration and reduces test time in production. |
| Ultra-low ICC | 0.5µA typical at 3V - extends battery life in handheld meters and sensor nodes beyond 10 years. |
| Guaranteed reset state | Valid reset assertion down to VCC = 1.2V - ensures fail-safe behavior even during severe undervoltage conditions. |
| No external components | Self-contained reset generator - removes need for RC networks, comparators, or voltage references, cutting BOM cost by $0.12–$0.25. |
| SC70-3 footprint | 2.0mm × 2.1mm body - fits into 3.5mm² PCB area, ideal for wearables and compact IoT edge nodes. |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules powered from 3.3V isolated DC-DC supplies subject to line transients and thermal cycling. IC Role / Device Role / Timing Role: Monitors 3.3V rail and asserts active-high RESET to ARM Cortex-M4 MCU during brownout, holding ≥100ms for firmware reload. Use Value: Prevents corrupted register writes during undervoltage by guaranteeing reset persistence across 100ms minimum timeout, validated per IEC 61000-4-4. |
Use Scenario: Battery-powered glucose meter with CR2032 coin cell and low-power MSP430 microcontroller. IC Role / Device Role / Timing Role: Supervises 2.5V LDO output and triggers active-high reset if battery sags below 2.32V, enabling safe shutdown before data loss. Use Value: 1µA max ICC extends usable battery life to >3 years; SC70-3 package enables sub-15mm² PCB layout for pocket-sized form factor. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: 12V-to-3.3V converted subsystem in door module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during cold-crank (≤2.32V) and holds RESET high until stable, synchronizing with CAN controller startup. Use Value: 40ppm/°C tempco ensures threshold stability across –40°C to +85°C ambient, meeting AEC-Q100 Grade 2 requirements. |
Use Scenario: Revenue-grade electricity meter with dual-supply architecture (3.3V logic, 5V RTC) and tamper detection. IC Role / Device Role / Timing Role: Resets meter SoC on 3.3V rail fault while maintaining RTC integrity via independent 5V supply path. Use Value: Push-pull output eliminates external pull-up resistor, reducing leakage paths and improving long-term accuracy per ANSI C12.20 Class 0.2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR23+ | SOT23-3 package (3.0mm × 1.7mm vs. SC70-3's 2.0mm × 2.1mm); identical electrical specs and marking code FFAA. | Preferred where legacy SOT23 footprints exist or thermal dissipation >320mW required (SOT23 derates at 4mW/°C vs. SC70's 2.7mW/°C). | Select MAX6327UR23+ for compatibility with existing SOT23 layouts; choose MAX6327XR23+ for maximum board-area savings. |
| MAX6347XR23+ | Same SC70-3 package and 2.32V threshold, but includes watchdog timer function not present in MAX6327XR23+. | Required in systems needing periodic µP health verification (e.g., industrial gateways), not just power-fail reset. | Use MAX6347XR23+ only if watchdog functionality is mandatory; MAX6327XR23+ offers lower cost and simpler integration for pure reset needs. |
Compared with MAX6327UR23+, the MAX6327XR23+ saves 35% PCB area but has lower thermal dissipation margin; versus MAX6347XR23+, it omits watchdog logic-reducing cost and complexity where only reset supervision is needed.
Availability
MAX6327XR23+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6327XR23+ 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 industrial, communications, and consumer applications, with expertise in power management and sensor interface solutions.
The MAX6327XR23+ belongs to Maxim's µP supervisory product line, engineered specifically for ultra-low-power, high-reliability reset generation in battery-operated and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6327XR23+ and how tightly is it specified?
The MAX6327XR23+ has a factory-trimmed nominal reset threshold of 2.32V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range of –40°C to +85°C. This specification is guaranteed by production testing and documented in Maxim's Electrical Characteristics table, ensuring consistent brownout detection across environmental conditions without user calibration.
Does the MAX6327XR23+ require any external components to operate?
No, the MAX6327XR23+ requires no external components. It integrates a precision voltage reference, comparator, and push-pull output driver in a single SC70-3 package. Unlike discrete reset solutions, it eliminates the need for external resistors, capacitors, or pull-up resistors-reducing BOM count, PCB area, and design validation effort for the MAX6327XR23+.
How does the MAX6327XR23+ behave when VCC falls below 1.2V?
The MAX6327XR23+ is guaranteed to maintain correct reset assertion down to VCC = 1.2V. Below this voltage, the internal circuitry may cease operation, but the output remains latched in its last valid state (typically HIGH during undervoltage). This behavior ensures fail-safe reset hold during deep brownout, a key reliability feature confirmed in the Absolute Maximum Ratings and Operating Range sections of the MAX6327XR23+ datasheet.
What is the power-on reset timeout duration for the MAX6327XR23+ and is it temperature-stable?
The MAX6327XR23+ guarantees a minimum reset timeout of 100ms after VCC rises above 2.32V, with a typical value of 185ms at +25°C and a maximum of 280ms across –40°C to +85°C. This timeout is generated by an internal RC network and is fully specified over temperature-ensuring µP initialization completes reliably regardless of ambient conditions for the MAX6327XR23+.
Can the MAX6327XR23+ replace the MAX809 in an existing design?
Yes, the MAX6327XR23+ is pin-compatible with the MAX809 in SC70-3 footprint and provides identical active-high push-pull reset functionality. However, the MAX6327XR23+ offers tighter threshold accuracy (±2.5% vs. ±3.5% for MAX809), lower supply current (1µA vs. 20µA), and improved transient immunity-making it a direct performance upgrade for the MAX6327XR23+ without PCB changes.
MAX6327XR23+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6327XR23+ FAQ
1.How can I place an order for MAX6327XR23+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327XR23+ 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 MAX6327XR23+ reliable?
The price and inventory of MAX6327XR23+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327XR23+ is usually 5 days.
3.What payment methods are accepted for MAX6327XR23+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327XR23+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327XR23+?
MAX6327XR23+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327XR23+ 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 MAX6327XR23+?
For technical support, including MAX6327XR23+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327XR23+ requirements.
6.How does Aetrix verify that MAX6327XR23+ is sourced from the original manufacturer or authorized distributors?
All MAX6327XR23+ 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 MAX6327XR23+ meets industry standards.
7.What is the process for return or replacement of MAX6327XR23+?
All MAX6327XR23+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327XR23+, 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 MAX6327XR23+ part is unused and in its original packaging.
Return procedure for MAX6327XR23+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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