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Analog Devices Inc./Maxim Integrated MAX6808XR32-T
- Part No.:
- MAX6808XR32-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6808XR32-T.pdf
- Description:
- MAX6808 VOLTAGE DETECTOR
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6808XR32-T from Maxim Integrated is a precision voltage detector IC designed for reliable power-supply monitoring in microprocessor-based systems. It features a factory-preset 3.2V ±2% reset threshold, active-low open-drain RESET output, and guaranteed operation down to VCC = 1.0V - enabling robust brownout detection in battery-powered instrumentation and portable controllers.
For engineers reviewing the MAX6808XR32-T datasheet, MAX6808XR32-T pinout, MAX6808XR32-T application, or MAX6808XR32-T equivalent, key selection criteria include its 3.2V threshold accuracy, SC70-3 package footprint, 35µA supply current, open-drain output compatibility with bidirectional µP reset pins, and immunity to sub-100µs negative VCC transients.
Technical Context
The MAX6808XR32-T implements a precision bandgap-based voltage reference and comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset assertion/deassertion during supply ramp-up and brownout conditions. Its open-drain RESET output requires an external pullup and supports interface to multiple supply domains up to 6V.
It operates across −40°C to +85°C with supply current of 35µA (typ) at VCC = 3.6V and 50µA (typ) at VCC = 5.5V. The device asserts RESET when VCC falls below 3.136V (min) and deasserts only after VCC rises above ~3.16–3.19V due to hysteresis - critical for noise-immune power sequencing in embedded controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2% (3.136V–3.264V at +25°C); ensures reliable detection before system ICs drop below minimum operating voltage. |
| Supply Voltage Range | 1.0V to 5.5V; enables valid reset signaling even during deep brownout or low-battery shutdown. |
| Supply Current | 35µA typical at 3.6V; minimizes quiescent load in always-on monitoring circuits. |
| RESET Output Type | Active-low open-drain; allows wired-OR configuration and safe interfacing with bidirectional µP reset I/O pins. |
| Hysteresis | 0.02–0.03 × VTH− (~63–98mV at 3.2V); prevents output chatter near threshold during noisy or slow-ramping supplies. |
| Operating Temperature | −40°C to +85°C; qualified for industrial and portable equipment environments without derating. |
| Package | 3-pin SC70 (X3-2 outline); 1.25mm × 0.85mm footprint ideal for space-constrained portable designs. |
Pinout & Package
MAX6808XR32-T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with pin 1 = RESET (active-low open-drain), pin 2 = GND, pin 3 = VCC. No manual reset (MR) or NC pins - consistent with 3-pin SOT23/SC70 variants.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output; must be pulled up externally (e.g., 100kΩ) to any supply ≤6V; sinks current during reset assertion. |
| 2 | GND | Ground reference for internal comparator and bandgap; connects to system ground plane for noise immunity. |
| 3 | VCC | Supply input; accepts 1.0V–5.5V; powers internal circuitry and defines reset threshold reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.2V threshold | ±2% accuracy over temperature ensures deterministic reset timing across −40°C to +85°C without calibration. |
| Open-drain RESET output | Enables direct interface to bidirectional µP reset pins (e.g., Motorola 68HC11) without contention or level-shifting. |
| Low 35µA supply current | Extends battery life in portable equipment by minimizing standby power draw during continuous monitoring. |
| Immunity to fast VCC transients | Rejects negative-going transients <100µs wide (e.g., 50mV overdrive), eliminating false resets in electrically noisy environments. |
| Valid RESET down to 1.0V VCC | Guarantees logic-low output even as supply collapses - critical for orderly shutdown sequencing in low-voltage systems. |
Applications
| Portable Medical Instrumentation | Industrial Controller Power Monitoring |
|---|---|
|
Use Scenario: Handheld blood glucose meters and pulse oximeters powered by single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Voltage detector asserting reset when battery drops below 3.2V to prevent corrupted memory writes or sensor misreads. Use Value: Prevents data corruption and unsafe operation by halting MCU execution before supply falls below 3.0V - aligning with 3.3V system IC minimum operating voltage. |
Use Scenario: PLC I/O modules requiring reliable power-fail detection during AC line sags or backup capacitor discharge. IC Role / Device Role / Timing Role: Supervisory IC generating clean, chatter-free reset signal to ARM Cortex-M4 controller during brownout events. Use Value: Internal hysteresis eliminates false resets caused by ripple on 3.3V rail, improving system uptime in electrically harsh factory environments. |
| Barcode Scanner Firmware Recovery | Smart Sensor Node Low-Power Wake-Up |
|
Use Scenario: Battery-operated handheld barcode scanners subjected to rapid on/off cycling and ESD-induced supply glitches. IC Role / Device Role / Timing Role: Reset supervisor ensuring full firmware reload after undervoltage-induced crash, using open-drain output compatible with scanner's bidirectional reset bus. Use Value: Open-drain architecture avoids bus contention during reset assertion, enabling safe recovery without hardware redesign. |
Use Scenario: Wireless environmental sensors sleeping at 1µA and waking periodically to sample temperature/humidity. IC Role / Device Role / Timing Role: Ultra-low-power voltage monitor asserting reset if coin-cell voltage drops below 3.2V before wake-up sequence begins. Use Value: 35µA quiescent current adds negligible load during multi-week sleep cycles, preserving battery capacity while guaranteeing valid startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB32DBZR | 3.2V ±1% threshold, push-pull active-low output, 0.9V min VCC, 2.5µA ICC | Lacks open-drain output; incompatible with bidirectional µP reset pins; better for ultra-low-power but simpler interfaces. | Select TLV803EB32DBZR only when push-pull drive suffices and sub-5µA supply current is mandatory. |
| TPS3808G32DBVR | 3.2V ±0.5% threshold, push-pull active-low output, 0.8V min VCC, 16µA ICC, programmable delay | Includes 200ms reset timeout; no open-drain option; higher accuracy but fixed delay adds latency. | Choose TPS3808G32DBVR when deterministic reset pulse width is required and open-drain is unnecessary. |
Compared with TLV803EB32DBZR and TPS3808G32DBVR, the MAX6808XR32-T uniquely provides open-drain output for bidirectional bus compatibility, guaranteed 1.0V operation, and industry-standard SC70-3 footprint - making it optimal for legacy µP interfaces and space-constrained portable designs where reset timing must be immediate and chatter-free.
Availability
MAX6808XR32-T is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial controller power monitoring, barcode scanner firmware recovery, and smart sensor node low-power wake-up requiring stable component supply and long-term lifecycle support.
Supply support for MAX6808XR32-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 high-performance analog and mixed-signal ICs for industrial, computing, and consumer applications, emphasizing precision, reliability, and integration.
The MAX6806/MAX6807/MAX6808 family delivers cost-effective, ultra-low-power voltage supervision for microprocessor systems - targeting applications where board space, supply current, and interface flexibility (push-pull vs. open-drain) are critical design constraints.
FAQ
What is the exact reset threshold voltage of the MAX6808XR32-T?
The MAX6808XR32-T has a factory-trimmed nominal reset threshold of 3.20V with ±2% accuracy over temperature, corresponding to a guaranteed range of 3.136V (min) to 3.264V (max) at +25°C. This value is specified for VCC falling and includes built-in hysteresis to prevent oscillation near the trip point. The MAX6808XR32-T datasheet confirms this threshold applies specifically to the XR32 variant in SC70 packaging.
Does the MAX6808XR32-T support manual reset functionality?
No, the MAX6808XR32-T does not support manual reset. Manual reset (MR) is only available on the 4-pin SOT143 package variants (e.g., MAX6808US32-T), which include a dedicated MR pin with internal 80kΩ pulldown. The MAX6808XR32-T uses a 3-pin SC70 package with only RESET, GND, and VCC pins - confirmed by its pin configuration diagram and ordering guide.
What external components are required for proper operation of the MAX6808XR32-T?
The MAX6808XR32-T requires only one external component: a pullup resistor on the open-drain RESET pin. A 100kΩ resistor to any supply ≤6V is recommended for high-impedance loads. No capacitors, dividers, or trimming components are needed - the device integrates precision reference, comparator, and hysteresis. This simplicity is explicitly stated in the MAX6808XR32-T general description and applications information.
Can the MAX6808XR32-T interface directly with a bidirectional microprocessor reset pin?
Yes, the MAX6808XR32-T is specifically designed for this use case. Its active-low open-drain RESET output avoids contention with bidirectional µP reset I/O (e.g., Motorola 68HC11), unlike push-pull alternatives. The MAX6808XR32-T datasheet explicitly recommends it for such interfaces in Figure 5 and the Applications Information section.
What is the minimum supply voltage at which the MAX6808XR32-T guarantees valid RESET output?
The MAX6808XR32-T guarantees valid RESET output down to VCC = 1.0V. Below this, the output becomes high-impedance. This specification is confirmed in the Electrical Characteristics table and General Description, and applies specifically to the MAX6808XR32-T (and all MAX6808 variants), distinguishing it from the MAX6807 (1.2V min) and supporting deep-brownout detection in low-voltage systems.
MAX6808XR32-T 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:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.2V
- 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:
- SOT-23-3
MAX6808XR32-T FAQ
1.How can I place an order for MAX6808XR32-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808XR32-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 MAX6808XR32-T reliable?
The price and inventory of MAX6808XR32-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808XR32-T is usually 5 days.
3.What payment methods are accepted for MAX6808XR32-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808XR32-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808XR32-T?
MAX6808XR32-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808XR32-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 MAX6808XR32-T?
For technical support, including MAX6808XR32-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808XR32-T requirements.
6.How does Aetrix verify that MAX6808XR32-T is sourced from the original manufacturer or authorized distributors?
All MAX6808XR32-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 MAX6808XR32-T meets industry standards.
7.What is the process for return or replacement of MAX6808XR32-T?
All MAX6808XR32-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808XR32-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 MAX6808XR32-T part is unused and in its original packaging.
Return procedure for MAX6808XR32-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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