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Analog Devices Inc./Maxim Integrated MAX6808UR32+T
- Part No.:
- MAX6808UR32+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6808UR32+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,586
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Product details
Overview
MAX6808UR32+T 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 SOT23 package-ideal for battery-powered instrumentation and portable equipment requiring reliable brownout detection.
For engineers reviewing the MAX6808UR32+T datasheet, MAX6808UR32+T pinout, MAX6808UR32+T application, or MAX6808UR32+T 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 SOT23 footprint suitability for space-constrained designs.
Technical Context
The MAX6808UR32+T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output chatter near the 3.2V threshold. Its open-drain RESET output requires an external pullup and supports interfacing with multiple supply domains up to 6V.
It functions as a standalone supervisory circuit without external components-asserting RESET when VCC falls below 3.2V (±2%) and holding it low until VCC rises above the hysteresis-enhanced rising threshold (~3.23V). No manual reset input is present in the SOT23 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.20V ±2% (4.5V to 5.5V operation; ensures reliable detection before system ICs drop below minimum operating voltage) |
| Supply Voltage Range | 1.0V to 5.5V (RESET remains valid down to 1.0V, enabling supervision during deep brownout) |
| Supply Current | 35µA typical at 3.6V (ultra-low quiescent current extends battery life in portable applications) |
| Output Type | Active-low open-drain (enables wired-OR configuration and safe interfacing with bidirectional µP reset I/O) |
| 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 for system recovery) |
| Tempco | 30ppm/°C (ensures stable threshold across −40°C to +85°C industrial temperature range) |
Pinout & Package
MAX6808UR32+T is supplied in a RoHS-compliant 3-pin SOT23 package (U3-1 outline), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. The package supports tape-and-reel delivery (2500 pcs minimum).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output; sinks current when VCC < 3.2V; requires external pullup to define logic-high level |
| 2 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 3 | VCC | Supply input (1.0V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.2V threshold | ±2% accuracy over −40°C to +85°C ensures compliance with 3V ±5% supply systems and prevents premature or delayed reset assertion |
| Open-drain RESET output | Enables direct interface with bidirectional µP reset pins (e.g., Motorola 68HC11) without contention or logic conflict |
| 1.0V VCC operation limit | Guarantees valid reset signal down to ultra-low supply levels-critical for battery-fail-safe sequencing in portable devices |
| 35µA supply current | Minimizes standby power draw in always-on monitoring circuits, extending operational lifetime in coin-cell or energy-harvesting systems |
| Transient immunity | Immune to negative-going VCC transients ≤100µs (at 100mV overdrive), eliminating false resets in noisy power environments |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
Use Scenario: Handheld multimeters and portable data loggers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Voltage detector providing brownout reset before MCU enters undefined state during battery discharge. Use Value: Prevents corrupted memory writes and firmware lockups by asserting RESET at precisely 3.2V, matching nominal 3.3V rail tolerance. | Use Scenario: Benchtop oscilloscopes and spectrum analyzers with FPGA-based front-end control. IC Role / Device Role / Timing Role: Supervisory IC ensuring clean power-up sequencing and fault-triggered system reset. Use Value: Open-drain output interfaces safely with FPGA I/O banks using different voltage domains (e.g., 1.8V core, 3.3V I/O), avoiding bus contention. |
| Critical µP and µC Power Monitoring | Bar-Code Scanners |
Use Scenario: Industrial PLC controllers where µP reliability directly impacts safety-critical operations. IC Role / Device Role / Timing Role: Primary reset supervisor monitoring main 3.3V supply feeding ARM Cortex-M7 MCU. Use Value: 30µs reset delay and 30ppm/°C tempco guarantee deterministic timing and threshold stability across wide ambient temperatures. | Use Scenario: Wireless handheld barcode scanners using Bluetooth LE and intermittent scanning duty cycles. IC Role / Device Role / Timing Role: Low-power voltage monitor enabling wake-from-sleep reset on supply sag during RF transmission bursts. Use Value: 35µA quiescent current minimizes average system power, while 1.0V VCC operation ensures reset validity even during deep battery sag. |
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 IQ | Lacks open-drain output; unsuitable for bidirectional µP reset pins or multi-voltage wired-OR buses | Select when lowest possible quiescent current is critical and push-pull drive suffices |
| ADM6315-3ARJZ-RL7 | 3.08V ±2.5% threshold, open-drain active-low output, 0.9V min VCC, 1.5µA IQ | Lower threshold (3.08V vs. 3.2V); tighter VCC operating range (0.9V–5.5V); no transient immunity spec provided | Select when marginally lower trip point is acceptable and ultra-low IQ dominates design priority |
Compared with TLV803EB32DBZR and ADM6315-3ARJZ-RL7, the MAX6808UR32+T uniquely balances ±2% threshold accuracy, robust 1.0V operation, documented VCC transient immunity, and SOT23 open-drain compatibility-making it optimal for µP systems demanding both precision and interface flexibility.
Availability
MAX6808UR32+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, critical µP and µC power monitoring, and bar-code scanners requiring stable component supply, long-term manufacturability, and consistent parametric performance.
Supply support for MAX6808UR32+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX680x series was designed specifically as precision, low-power voltage detectors for microprocessor supervisory functions-emphasizing threshold accuracy, minimal external components, and robust operation across industrial temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6808UR32+T?
The MAX6808UR32+T has a factory-trimmed nominal reset threshold of 3.20V with ±2% accuracy over −40°C to +85°C. Electrical characteristics specify VTH− = 3.136V (min), 3.20V (typ), and 3.264V (max) at +25°C, ensuring reliable detection before downstream ICs fall out of specification.
Does the MAX6808UR32+T have a manual reset input?
No, the MAX6808UR32+T does not include a manual reset (MR) input. That feature is only available in the 4-pin SOT143 package variants (e.g., MAX6808US32-T). The SOT23 package used by MAX6808UR32+T contains only RESET, GND, and VCC pins.
What pullup resistor value is recommended for the MAX6808UR32+T's open-drain RESET output?
A 100kΩ pullup resistor is recommended for the MAX6808UR32+T's open-drain RESET output when driving high-impedance loads. This value ensures sufficient sink current for a logic-low state while limiting leakage-induced voltage rise during reset deassertion-especially important when interfacing with µPs having bidirectional reset I/O.
Can the MAX6808UR32+T operate with a 1.8V supply?
Yes, the MAX6808UR32+T operates with supply voltages from 1.0V to 5.5V. At 1.8V, it maintains full functionality-including accurate 3.2V threshold comparison and valid open-drain RESET assertion-making it suitable for modern low-voltage µP systems and partial-power-down modes.
Is the MAX6808UR32+T pin-compatible with other MAX680x SOT23 variants?
Yes, all MAX680x SOT23 variants-including MAX6806URxx-T, MAX6807URxx-T, and MAX6808URxx-T-share identical 3-pin SOT23 pinouts (Pin 1 = RESET, Pin 2 = GND, Pin 3 = VCC). Only the reset output type (push-pull vs. open-drain) and threshold voltage differ between part numbers.
MAX6808UR32+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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+T FAQ
1.How can I place an order for MAX6808UR32+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808UR32+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 MAX6808UR32+T reliable?
The price and inventory of MAX6808UR32+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808UR32+T is usually 5 days.
3.What payment methods are accepted for MAX6808UR32+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808UR32+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808UR32+T?
MAX6808UR32+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808UR32+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 MAX6808UR32+T?
For technical support, including MAX6808UR32+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808UR32+T requirements.
6.How does Aetrix verify that MAX6808UR32+T is sourced from the original manufacturer or authorized distributors?
All MAX6808UR32+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 MAX6808UR32+T meets industry standards.
7.What is the process for return or replacement of MAX6808UR32+T?
All MAX6808UR32+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808UR32+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 MAX6808UR32+T part is unused and in its original packaging.
Return procedure for MAX6808UR32+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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