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Analog Devices Inc./Maxim Integrated MAX6808XR32
- Part No.:
- MAX6808XR32
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6808XR32.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
MAX6808XR32 from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 3.2V ±2% reset threshold, active-low open-drain RESET output, operates down to VCC = 1.0V, draws only 35µA supply current, and is housed in a 3-pin SC70 package - enabling reliable brownout detection in portable battery-powered equipment.
For engineers reviewing the MAX6808XR32 datasheet, MAX6808XR32 pinout, MAX6808XR32 application, or MAX6808XR32 equivalent, key selection criteria include its 3.2V threshold accuracy, open-drain output compatibility with bidirectional µP reset pins, immunity to VCC transients, guaranteed reset assertion down to 1V supply, and SC70 footprint suitability for space-constrained designs.
Technical Context
The MAX6808XR32 implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output oscillation near threshold. Its open-drain RESET output requires an external pullup resistor and supports interfacing with multiple supply domains up to 6V.
It asserts reset when VCC falls below 3.2V (±2% at +25°C), maintains valid output down to VCC = 1.0V, exhibits ≤30ppm/°C temperature coefficient on threshold, and rejects short negative-going VCC transients - critical for stable operation in noisy or dynamically loaded power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2% (4.508V–4.692V for 4.6V variant; this part is 3.2V) |
| Supply Voltage Range | 1.0V to 5.5V - enables operation during deep brownout and full-system power-up sequencing |
| Supply Current | 35µA typical at VCC = 3.6V - minimizes quiescent load on battery or low-power rails |
| RESET Output Type | Active-low, open-drain - allows wired-OR configuration and interface with bidirectional µP reset I/O |
| Reset Delay | 30µs typical (VCC falling at 1mV/µs) - ensures clean, jitter-free reset pulse timing |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended commercial environments |
| Threshold Tempco | ≤30ppm/°C - maintains tight trip-point stability across temperature without calibration |
Pinout & Package
MAX6808XR32 is supplied in a 3-pin SC70 package (outline 21-0075), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant finish. Tape-and-reel packaging supports automated SMT assembly (2500 pcs minimum order).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Sinks current when VCC < 3.2V; requires external pullup to define logic-high level and drive load |
| 2 | GND | Reference ground for internal comparator and output stage; must be low-impedance |
| 3 | VCC | Power supply input; monitors rail directly; functional down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.2V threshold | ±2% accuracy over −40°C to +85°C eliminates external resistor dividers and calibration |
| Open-drain RESET output | Enables shared reset bus, level-shifting across supplies (up to 6V), and safe interface with bidirectional µP reset pins |
| 1.0V minimum VCC operation | Guarantees valid reset assertion even during severe brownout or battery depletion |
| 35µA supply current | Reduces standby power in always-on monitoring circuits - critical for battery life in portable instruments |
| Internal hysteresis | Prevents chatter near threshold (VHYST = 0.02–0.03 × VTH−), ensuring noise-immune switching |
Applications
| Portable/Battery-Powered Equipment | Bar-Code Scanners |
|---|---|
Use Scenario: Monitoring Li-ion or alkaline battery voltage during discharge to trigger controlled shutdown before deep depletion. IC Role / Device Role / Timing Role: Precision voltage detector asserting reset when battery drops below 3.2V, halting processor execution and preserving data integrity. Use Value: Prevents system lockup or memory corruption by guaranteeing reset activation before VCC falls below µP minimum operating voltage (e.g., 2.7V). | Use Scenario: Ensuring reliable boot and recovery after brief power interruptions caused by motor startup or ESD events. IC Role / Device Role / Timing Role: Brownout detector generating clean, transient-immune reset pulse to reinitialize scanner controller and image sensor interface. Use Value: Eliminates false resets from short VCC dips (<10µs at 100mV overdrive), improving uptime and scan reliability. |
| Critical µP and µC Power Monitoring | Intelligent Instruments |
Use Scenario: Supervising 3.3V logic supply in embedded controllers where µP reset pin is bidirectional (e.g., ARM Cortex-M series). IC Role / Device Role / Timing Role: Open-drain voltage detector replacing push-pull alternatives to avoid contention on shared reset line. Use Value: Enables safe reset signaling without risk of output conflict or excessive current draw during µP reset pin direction changes. | Use Scenario: Providing deterministic power-on reset and brownout protection in handheld multimeters or data loggers with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Primary supervisor IC asserting reset until 3.3V rail stabilizes above 3.2V with 30µs delay, synchronizing ADC, display, and communication initialization. Use Value: Guarantees consistent boot sequence across temperature (−40°C to +85°C) and supply tolerance (±2% threshold), reducing field failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR32-T | Same 3.2V ±2% threshold, but features push-pull active-low RESET and no manual reset; SC70-3 package | Lacks open-drain flexibility - unsuitable for bidirectional µP reset pins or multi-supply reset buses | Select MAX6326UR32-T only if push-pull drive strength (≥20mA sink/source) is required and shared reset topology is not used. |
| TPS3808G33DBVR | 3.3V threshold (not 3.2V), ±0.5% initial accuracy, adjustable delay, SOT-23-5 package with enable input | Higher accuracy and programmable delay, but larger footprint and higher BOM cost; no SC70 option | Choose TPS3808G33DBVR when tighter threshold tolerance or configurable reset timeout is mandatory, and board area permits SOT-23-5. |
Compared with MAX6808XR32, MAX6326UR32-T offers stronger output drive but sacrifices open-drain interoperability, while TPS3808G33DBVR delivers superior accuracy and delay control at the expense of package size and cost - making MAX6808XR32 optimal for compact, cost-sensitive, multi-rail reset applications requiring 3.2V trip point.
Availability
MAX6808XR32 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, bar-code scanners, critical µP and µC power monitoring, and intelligent instruments requiring stable component supply and long-term industrial availability.
Supply support for MAX6808XR32 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 computing markets.
The MAX6806/MAX6807/MAX6808 family was engineered specifically for precision, low-power supply monitoring in space- and power-constrained digital systems - emphasizing threshold accuracy, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6808XR32?
The MAX6808XR32 has a factory-preset nominal reset threshold of 3.20V, with guaranteed accuracy of ±2% over the full operating temperature range (−40°C to +85°C). At +25°C, the threshold falls between 3.136V and 3.264V. This value is laser-trimmed during production and does not require external components or calibration.
Why does the MAX6808XR32 use an open-drain RESET output instead of push-pull?
The MAX6808XR32 uses an open-drain RESET output to safely interface with bidirectional microprocessor reset pins (e.g., Motorola 68HC11, certain ARM cores) and enable wired-OR reset buses across multiple supply domains. Unlike push-pull outputs, it avoids contention and allows pullup to any voltage up to 6V - a design choice confirmed in the MAX6808 datasheet's "Interfacing to µPs with Bidirectional Reset Pins" section.
Can the MAX6808XR32 operate reliably below 1.8V supply voltage?
Yes - the MAX6808XR32 is fully specified to operate down to VCC = 1.0V. Its RESET output remains valid (logic-low when asserted) across this entire range, and supply current stays at just 35µA typical at 1.0V. This capability is explicitly guaranteed in the Electrical Characteristics table and enables use in ultra-low-voltage battery backup or energy-harvesting applications.
What package type and dimensions does the MAX6808XR32 use?
The MAX6808XR32 is packaged in a 3-pin SC70 (SOT-323) outline, designated X3-2 per Maxim's package documentation. Its footprint measures 2.0mm × 2.1mm with 0.65mm lead pitch and 0.95mm maximum height. It ships in tape-and-reel format with a minimum order quantity of 2500 units - consistent across all SC70 variants in the MAX6806/07/08 family.
How does the MAX6808XR32 handle power-supply transients?
The MAX6808XR32 is immune to short-duration negative-going VCC transients - it will not falsely assert reset for pulses under specific overdrive/duration limits (e.g., <10µs at 100mV overdrive). This behavior is characterized in Figure 3 of the datasheet. Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances transient rejection, a recommendation validated in the Applications Information section.
MAX6808XR32 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.6V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 30µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6808XR32 FAQ
1.How can I place an order for MAX6808XR32 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808XR32 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 MAX6808XR32 reliable?
The price and inventory of MAX6808XR32 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808XR32 is usually 5 days.
3.What payment methods are accepted for MAX6808XR32?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808XR32 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808XR32?
MAX6808XR32 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808XR32 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 MAX6808XR32?
For technical support, including MAX6808XR32 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808XR32 requirements.
6.How does Aetrix verify that MAX6808XR32 is sourced from the original manufacturer or authorized distributors?
All MAX6808XR32 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 MAX6808XR32 meets industry standards.
7.What is the process for return or replacement of MAX6808XR32?
All MAX6808XR32 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808XR32, 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 MAX6808XR32 part is unused and in its original packaging.
Return procedure for MAX6808XR32:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6808XR32 Tags
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MIC826SYMT-TR
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