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Analog Devices Inc./Maxim Integrated MAX6808UR32
- Part No.:
- MAX6808UR32
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6808UR32.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,875
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Product details
Overview
MAX6808UR32 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 embedded controllers and portable instrumentation.
For engineers reviewing the MAX6808UR32 datasheet, MAX6808UR32 pinout, MAX6808UR32 application, or MAX6808UR32 equivalent, this device is selected for low-quiescent-current (35µA typical), transient-immune power monitoring where open-drain reset signaling is required to interface with bidirectional µP reset pins or multi-rail systems.
Technical Context
The MAX6808UR32 implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output chatter near the 3.20V falling threshold. Its open-drain RESET output requires an external pullup and supports voltage translation up to 6.0V, making it suitable for interfacing across mixed-supply domains.
It operates over −40°C to +85°C with supply current stable from 1.0V to 5.5V VCC, and exhibits 30ppm/°C reset-threshold temperature coefficient. The SOT23-3 package has no manual reset input - that feature is exclusive to the 4-pin SOT143 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2% (VTH− at +25°C); ensures reset assertion 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 ultra-low-power wake-up |
| Quiescent Current | 35µA typical at VCC = 3.6V; minimizes battery drain in always-on monitoring applications |
| RESET Output Type | Active-low open-drain; allows wired-OR configuration and level-shifting with external pullup to any rail ≤6V |
| Hysteresis | 0.02–0.03 × VTH−; prevents oscillation during slow-rising/falling VCC transitions near threshold |
| Reset Delay | 30µs typical (VCC falling at 1mV/µs); provides deterministic timing margin for power sequencing |
| Operating Temp | −40°C to +85°C; qualified for industrial and portable equipment environments |
Pinout & Package
MAX6808UR32 is supplied in a 3-pin SOT23 package (U3-1 outline), with pin 1 = RESET (active-low open-drain), pin 2 = GND, pin 3 = VCC. No manual reset (MR) or NC pins are present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain output | Sinks current when VCC < 3.20V; requires external pullup for logic-high state; compatible with bidirectional µP reset I/O |
| 2 (GND) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance to ensure accurate threshold sensing |
| 3 (VCC) | Supply input | Monitored power rail; device asserts reset if this voltage falls below 3.20V ±2%; functional down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% accurate reset threshold | Guarantees reset assertion before 3.3V-system ICs fall below 3.0V minimum operating voltage |
| Open-drain RESET output | Enables safe interface with bidirectional µP reset pins (e.g., Motorola 68HC11) without contention |
| 35µA supply current | Extends battery life in portable scanners and handheld instruments requiring continuous monitoring |
| VCC = 1.0V reset validity | Maintains deterministic reset state during deep discharge or low-VCC wake-up sequences |
| Immunity to VCC transients | Rejects negative-going spikes ≤100mV overdrive for durations under 10µs - reduces false resets |
Applications
| Bar-Code Scanners | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Battery voltage sag during motor activation or laser firing triggers intermittent system lockup. IC Role / Device Role / Timing Role: Power-monitoring supervisor asserting reset when VCC drops below 3.2V during transient load. Use Value: Prevents corrupted scan data or firmware crashes by ensuring clean restart before voltage recovers. |
Use Scenario: Lithium coin-cell powered instrument operating near end-of-life with gradual VCC decay. IC Role / Device Role / Timing Role: Low-threshold (3.2V) voltage detector maintaining reset assertion until VCC stabilizes above specification. Use Value: Guarantees µC remains held in reset until sufficient energy is available for reliable boot. |
| Critical µP and µC Power Monitoring | Intelligent Instruments |
Use Scenario: Industrial controller experiencing brownout due to shared AC line noise or switching regulator instability. IC Role / Device Role / Timing Role: Precision reset generator with hysteresis preventing chatter during marginal VCC conditions. Use Value: Eliminates spurious reboots and ensures deterministic recovery after power anomaly clears. |
Use Scenario: Handheld multimeter or environmental sensor logging data while switching between sleep and active modes. IC Role / Device Role / Timing Role: Ultra-low-current (35µA) voltage monitor enabling always-on supervision without compromising battery runtime. Use Value: Delivers >1-year shelf life on CR2032 while guaranteeing reset integrity during cold-start or low-temp operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6808UR26-T | 2.6V ±2% reset threshold; identical SOT23-3 package and open-drain output | Targeted for 2.5V/2.7V systems instead of 3.3V rails; same quiescent current and temp range | Select when monitoring lower-voltage supplies where 3.2V threshold would assert prematurely |
| MAX6315US32D3-T | 3.2V ±1.5% threshold; 3-pin SOT143 with manual reset (MR) input; 1.5µA max ICC | Supports operator-initiated reset via MR pin; optimized for ultra-low-power applications | Choose when system requires both voltage monitoring and hardware-triggered reset capability |
Compared with MAX6808UR32, the MAX6808UR26-T offers identical functionality at a lower threshold for 2.5V systems, while the MAX6315US32D3-T adds manual reset and lower supply current but uses a different package and lacks SOT23 compatibility.
Availability
MAX6808UR32 is available at Aetrix Electronics and suitable for bar-code scanners, portable/battery-powered equipment, and critical µP power monitoring requiring stable component supply, consistent top-mark (FZFL), and RoHS-compliant SOT23 packaging.
Supply support for MAX6808UR32 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, computing, and consumer applications, with emphasis on reliability, integration, and low-power operation.
The MAX6806/MAX6807/MAX6808 family delivers cost-effective, single-chip voltage supervision for microprocessor systems - eliminating external resistors and trimming while supporting push-pull and open-drain reset architectures.
FAQ
What is the exact reset threshold voltage of the MAX6808UR32?
The MAX6808UR32 has a factory-trimmed nominal reset threshold of 3.20V with ±2% accuracy over temperature (−40°C to +85°C). At +25°C, the specified range is 3.136V to 3.264V for VCC falling. This threshold ensures reset assertion before 3.3V-system ICs fall below their 3.0V minimum operating voltage.
Does the MAX6808UR32 support manual reset functionality?
No, the MAX6808UR32 does not support manual reset. Manual reset (MR) is only available on the 4-pin SOT143 package variants (e.g., MAX6808US32-T). The MAX6808UR32 uses a 3-pin SOT23 package with RESET, GND, and VCC only - no MR pin is present or internally connected.
What pullup resistor value is recommended for the MAX6808UR32's open-drain RESET output?
A 100kΩ pullup resistor is recommended for the MAX6808UR32 RESET output when driving high-impedance loads. This value ensures a solid logic high while limiting sink current to <10µA at 3.3V, preserving low system power consumption. For heavier loads or faster rise times, values as low as 10kΩ may be used, provided the sink current remains within the 20µA spec.
Can the MAX6808UR32 operate reliably below 1.8V supply voltage?
Yes, the MAX6808UR32 is fully specified down to VCC = 1.0V. Its RESET output remains valid (logic low) for VCC ≥ 1.0V, and supply current stays stable (35µA typ.) even at 1.0V. This makes the MAX6808UR32 suitable for ultra-low-voltage brownout detection in energy-harvesting or coin-cell applications.
Is the MAX6808UR32 pin-compatible with other MAX680x series devices in SOT23-3?
Yes, all MAX6806/MAX6807/MAX6808 variants in the 3-pin SOT23 package (e.g., MAX6806UR32-T, MAX6807UR32-T, MAX6808UR32-T) share identical pinout: pin 1 = RESET, pin 2 = GND, pin 3 = VCC. However, output polarity and type differ - only the MAX6808UR32 provides active-low open-drain; others use push-pull outputs.
MAX6808UR32 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:
- 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:
- SOT-23-3
MAX6808UR32 FAQ
1.How can I place an order for MAX6808UR32 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808UR32 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 MAX6808UR32 reliable?
The price and inventory of MAX6808UR32 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808UR32 is usually 5 days.
3.What payment methods are accepted for MAX6808UR32?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808UR32 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808UR32?
MAX6808UR32 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808UR32 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 MAX6808UR32?
For technical support, including MAX6808UR32 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808UR32 requirements.
6.How does Aetrix verify that MAX6808UR32 is sourced from the original manufacturer or authorized distributors?
All MAX6808UR32 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 MAX6808UR32 meets industry standards.
7.What is the process for return or replacement of MAX6808UR32?
All MAX6808UR32 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808UR32, 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 MAX6808UR32 part is unused and in its original packaging.
Return procedure for MAX6808UR32:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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