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Analog Devices Inc./Maxim Integrated MAX6808UR46-T
- Part No.:
- MAX6808UR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6808UR46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,950
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Product details
Overview
MAX6808UR46-T from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 4.6V ±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 - enabling reliable brownout detection in portable and battery-powered equipment.
For engineers reviewing the MAX6808UR46-T datasheet, MAX6808UR46-T pinout, MAX6808UR46-T application, or MAX6808UR46-T equivalent, this device is selected for low-power, space-constrained designs requiring precise, hysteresis-stabilized reset assertion during supply undervoltage events without external components.
Technical Context
The MAX6808UR46-T implements a comparator-based reset architecture with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable switching during supply transients near the 4.6V threshold. Its open-drain output supports flexible pull-up to any voltage ≤6V, enabling interoperability across mixed-supply systems.
It guarantees RESET assertion for VCC down to 1.0V and exhibits immunity to negative-going VCC transients up to 100µs at 100mV overdrive. The device is rated for −40°C to +85°C operation and features no manual reset input in the SOT23 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.6V ±2% (VTH−), factory-trimmed - ensures accurate power-fail detection for 5V ±5% supplies |
| Supply Current | 35µA typical at VCC = 3.6V - enables multi-year battery life in portable applications |
| Operating Voltage Range | 1.0V to 5.5V - allows valid reset signaling even during deep brownout conditions |
| Output Type | Active-low open-drain - permits wired-OR configuration and level-shifting via external pull-up |
| Hysteresis | 0.02–0.03 × VTH− - prevents output chatter during slow-rising/falling VCC near threshold |
| Reset Delay | 30µs typical (VCC falling at 1mV/µs) - provides fast, deterministic response to supply collapse |
| Tempco | 30ppm/°C - maintains threshold stability across industrial temperature range |
Pinout & Package
MAX6808UR46-T is supplied in a 3-pin SOT23 package (U3-1 outline), measuring 2.92mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant finish. Tape-and-reel packaging (2500 pcs minimum) supports automated assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (output) | Active-low open-drain output - requires external pull-up; sinks current when VCC < 4.6V |
| 2 | GND | Ground reference for internal comparator and output stage |
| 3 | VCC | Supply input - powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| ±2% accurate reset threshold | Eliminates need for external trimming resistors or calibration in production test |
| Open-drain RESET output | Enables shared reset bus across multiple voltage domains using a single pull-up resistor |
| 35µA supply current | Reduces quiescent power draw in always-on monitoring circuits by >90% vs. discrete solutions |
| Immunity to VCC transients | Rejects sub-100µs negative glitches - avoids false resets in noisy power environments |
| No external components required | Reduces BOM count, PCB area, and qualification effort for reset supervision function |
Applications
| Portable/Battery-Powered Equipment | Bar-Code Scanners |
|---|---|
Use Scenario: Handheld scanner operating from single-cell Li-ion (3.0–4.2V) with firmware watchdog requiring clean reset on battery sag. IC Role / Device Role / Timing Role: Voltage detector asserting reset when cell voltage drops below 4.6V - preventing corrupted memory writes or state machine lockup. Use Value: Prevents data corruption during low-battery operation while consuming only 35µA - extending usable runtime. |
Use Scenario: Industrial barcode reader powered from 5V rail with ESD-prone I/O lines causing transient-induced supply dips. IC Role / Device Role / Timing Role: Immune voltage monitor generating glitch-free reset despite 50mV/10µs VCC transients. Use Value: Eliminates spurious reboots during scanning bursts, improving field reliability without added filtering. |
| Critical µP and µC Power Monitoring | Intelligent Instruments |
Use Scenario: Microcontroller in medical sensor node must halt execution before supply falls below 4.5V to preserve EEPROM integrity. IC Role / Device Role / Timing Role: Precision reset supervisor with 4.6V ±2% threshold and 30µs delay - triggering controlled shutdown prior to functional failure. Use Value: Guarantees deterministic reset before VCC reaches 4.5V, meeting IEC 62304 safety requirements. |
Use Scenario: Portable multimeter with dual 3.3V/5V rails and LCD controller requiring synchronized reset on main supply fault. IC Role / Device Role / Timing Role: Open-drain output pulled to 3.3V rail - enabling unified reset assertion across both voltage domains. Use Value: Simplifies reset tree design and eliminates level-shifter ICs in multi-rail instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6806UR46-T | Active-low push-pull RESET output; no external pull-up required | Better suited for single-rail systems where drive strength and speed are prioritized over bus sharing | Select when driving CMOS inputs directly without level translation or shared reset lines |
| TLV803EB26DBZR | 2.63V threshold, 350ms reset timeout, SOT23-3 package, 0.5µA quiescent current | Designed for longer reset hold times and ultra-low-power wake-up supervision, not fast brownout response | Select when extended reset pulse duration and nanoamp standby are critical, not precision 4.6V detection |
Compared with MAX6806UR46-T, the MAX6808UR46-T trades push-pull drive for open-drain flexibility and bus compatibility; compared with TLV803EB26DBZR, it offers tighter threshold accuracy and faster response but higher quiescent current - making it optimal for 4.6V systems needing deterministic, low-latency reset assertion.
Availability
MAX6808UR46-T 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 with guaranteed long-term sourcing.
Supply support for MAX6808UR46-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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6806/MAX6807/MAX6808 family delivers precision voltage supervision for microprocessor systems - engineered to replace discrete reset circuits with factory-trimmed accuracy, minimal footprint, and robust transient immunity.
FAQ
What is the reset threshold voltage of the MAX6808UR46-T?
The MAX6808UR46-T has a factory-preset reset threshold of 4.6V with ±2% accuracy (4.508V to 4.692V at +25°C). This value is trimmed during production and remains stable across temperature with a tempco of 30ppm/°C. The threshold applies specifically to the falling VCC condition (VTH−), and hysteresis ensures clean transition without oscillation near the trip point.
Does the MAX6808UR46-T have a manual reset input?
No, the MAX6808UR46-T does not include a manual reset (MR) input. That feature is only available in the 4-pin SOT143 package variants (e.g., MAX6808US46-T). The SOT23 package used by MAX6808UR46-T contains only three pins: VCC, GND, and open-drain RESET - eliminating MR functionality to maintain minimal footprint and cost.
What is the minimum supply voltage at which the MAX6808UR46-T guarantees RESET assertion?
The MAX6808UR46-T guarantees RESET assertion (low output) for VCC down to 1.0V. Below this voltage, the internal circuitry ceases to sink current and the RESET pin becomes high-impedance. For applications requiring valid logic levels down to ground, an external pulldown resistor (e.g., 100kΩ) is recommended on the RESET line.
Can the MAX6808UR46-T be used with a 3.3V pull-up resistor on the RESET line?
Yes, the MAX6808UR46-T's open-drain RESET output supports pull-up to any voltage up to 6.0V, including 3.3V. A 100kΩ pull-up is sufficient for high-impedance loads, and the device sinks ≥20µA at VCC = 1.0V to ensure a solid logic low. This enables direct interfacing with 3.3V microcontrollers without level-shifting circuitry.
How does the MAX6808UR46-T differ from the MAX6807UR46-T?
The MAX6808UR46-T features an active-low open-drain RESET output, whereas the MAX6807UR46-T uses an active-high push-pull output. This makes MAX6808UR46-T suitable for wired-OR reset buses and multi-supply systems, while MAX6807UR46-T drives high-impedance CMOS inputs directly. Both share identical 4.6V threshold, ±2% accuracy, and 35µA supply current.
MAX6808UR46-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:
- 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
MAX6808UR46-T FAQ
1.How can I place an order for MAX6808UR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808UR46-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 MAX6808UR46-T reliable?
The price and inventory of MAX6808UR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808UR46-T is usually 5 days.
3.What payment methods are accepted for MAX6808UR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808UR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808UR46-T?
MAX6808UR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808UR46-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 MAX6808UR46-T?
For technical support, including MAX6808UR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808UR46-T requirements.
6.How does Aetrix verify that MAX6808UR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6808UR46-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 MAX6808UR46-T meets industry standards.
7.What is the process for return or replacement of MAX6808UR46-T?
All MAX6808UR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808UR46-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 MAX6808UR46-T part is unused and in its original packaging.
Return procedure for MAX6808UR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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