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Analog Devices Inc./Maxim Integrated MAX6806US26-T
- Part No.:
- MAX6806US26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806US26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:8,588
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Product details
Overview
MAX6806US26-T from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 2.6V ±2% reset threshold, active-low push-pull RESET output, and manual-reset (MR) input - all in a 4-pin SOT143 package. Valid down to VCC = 1.0V, it ensures reliable brownout detection in battery-powered instrumentation and portable controllers.
For engineers reviewing the MAX6806US26-T datasheet, MAX6806US26-T pinout, MAX6806US26-T application, or MAX6806US26-T equivalent, key selection criteria include reset threshold accuracy (±2%), MR input support, push-pull output drive capability, low 35µA supply current, and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX6806US26-T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), enabling stable switching during supply transients. Its reset assertion is triggered when VCC falls below 2.548V (min) at +25°C, with temperature coefficient of ≤30 ppm/°C.
It integrates an 80kΩ internal pulldown resistor on the MR pin, allowing direct connection of a momentary switch to VCC for manual reset initiation. The push-pull RESET output drives logic-low (≤0.3V at 20µA, VCC = 1.0V) and logic-high (≥0.8×VCC at 2.0mA, VCC = 5.0V) without external pullup components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.6V ±2% (2.548V–2.652V at +25°C); ensures accurate power-fail detection for 2.5V/3.3V systems |
| Supply Voltage Range | 1.0V to 5.5V (–40°C to +85°C); supports operation during deep brownout and battery discharge |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in portable equipment |
| RESET Output Type | Active-low, push-pull; eliminates need for external pullup and drives CMOS/TTL loads directly |
| Manual Reset Input | MR pin with 80kΩ internal pulldown; allows hardware-initiated reset via momentary switch without external biasing |
| Hysteresis | 0.02–0.03 × VTH−; prevents output chatter near threshold during slow-rising/falling VCC |
| Operating Temperature | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MAX6806US26-T is housed in a 4-pin SOT143 package (JEDEC MO-178AA), with exposed pad option not specified. Pin 1 is RESET, Pin 2 is GND, Pin 3 is VCC, and Pin 4 is MR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low push-pull reset output | Asserts logic-low when VCC < 2.6V or MR = high; sinks up to 1mA, drives high to ≥0.8×VCC |
| 2 (GND) | Ground reference | Return path for internal circuitry and RESET output; must be low-impedance for noise immunity |
| 3 (VCC) | Supply voltage input | Power source for detector core; operates down to 1.0V with full reset functionality |
| 4 (MR) | Active-high manual reset input | Asserts RESET low when pulled ≥0.7×VCC; internally pulldown-biased (80kΩ) for NC-safe operation |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.6V threshold | ±2% accuracy over temperature ensures consistent trip point across –40°C to +85°C without calibration |
| Integrated MR function | Eliminates external pullup/pulldown resistors and simplifies board layout for test/reset access |
| Push-pull RESET output | Drives both logic-high and logic-low states actively - no external pullup required for standard µP reset inputs |
| Low 35µA quiescent current | Minimizes standby power draw in always-on monitoring circuits for battery-operated bar-code scanners |
| Transient immunity | Immune to negative-going VCC transients ≤100µs (at 100mV overdrive), improving robustness in noisy power environments |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
Use Scenario: Handheld multimeters and portable data loggers operating from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Monitors declining battery voltage and asserts reset before system logic fails due to undervoltage. Use Value: Prevents corrupted memory writes and erratic µC behavior during battery depletion by triggering clean restart at 2.6V threshold. | Use Scenario: Benchtop oscilloscopes and spectrum analyzers requiring deterministic power-up sequencing. IC Role / Device Role / Timing Role: Provides precise power-on reset signal synchronized to 3.3V analog/digital supply stabilization. Use Value: Ensures FPGA configuration and ADC initialization occur only after supplies settle within spec, eliminating boot failures. |
| Critical µP and µC Power Monitoring | Bar-Code Scanners |
Use Scenario: Industrial PLC controllers where firmware integrity depends on reliable reset during AC line sags. IC Role / Device Role / Timing Role: Detects brownout events on 5V or 3.3V rails and holds µP in reset until voltage recovers above 2.6V + hysteresis. Use Value: Avoids partial instruction execution and register corruption during transient dips, meeting IEC 61000-4-11 immunity requirements. | Use Scenario: Wireless handheld bar-code scanners using intermittent duty-cycle operation to extend battery life. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and provides manual reset via trigger-button interface through MR pin. Use Value: Enables field-serviceable recovery from lockup without battery removal, reducing downtime and service calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR26-T | Same 2.6V threshold, but no MR pin; 3-pin SOT23 package; higher 50µA supply current | Lacks manual reset capability; unsuitable where field reset is required | Select when board space is constrained and MR is unnecessary |
| TPS3808G26DBVR | 2.63V threshold (±0.5%), 1.8–6.0V VCC range, 1.6µA quiescent current, no MR pin | Lower power but no manual reset; open-drain output requires pullup | Prefer for ultra-low-power designs where MR and push-pull drive are not needed |
Compared with MAX6806US26-T, MAX6326UR26-T saves board area but removes MR functionality, while TPS3808G26DBVR reduces supply current by >95% yet requires external pullup and lacks MR - making MAX6806US26-T optimal for compact, field-serviceable 2.6V monitoring.
Availability
MAX6806US26-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 and long-term industrial availability.
Supply support for MAX6806US26-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 precision analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6806 series belongs to Maxim's supervisory IC product line, engineered specifically for accurate, low-power voltage monitoring in space-constrained and battery-sensitive systems.
FAQ
What is the exact reset threshold voltage of the MAX6806US26-T?
The MAX6806US26-T has a factory-trimmed nominal reset threshold of 2.6V, with guaranteed accuracy of ±2% over temperature (2.548V to 2.652V at +25°C). This tolerance remains valid across the full –40°C to +85°C operating range, supported by a tempco of ≤30 ppm/°C.
Does the MAX6806US26-T support manual reset, and how is it implemented?
Yes, the MAX6806US26-T supports manual reset via its dedicated MR pin (Pin 4 in SOT143). The MR input is active-high with an internal 80kΩ pulldown resistor, allowing direct connection of a momentary switch between MR and VCC. When MR rises above 0.7×VCC, RESET is asserted low immediately - independent of VCC level.
What is the minimum supply voltage at which the MAX6806US26-T guarantees valid RESET output?
The MAX6806US26-T guarantees valid RESET output down to VCC = 1.0V. Specifically, RESET remains a logic-low (≤0.3V at 20µA sink) for VCC ≥ 1.0V, and transitions cleanly to logic-high (≥0.8×VCC) once VCC exceeds the 2.6V threshold plus hysteresis. Below 1.0V, RESET becomes high-impedance.
Can the MAX6806US26-T replace the MAX6326UR26-T in an existing design?
No direct replacement: while both offer 2.6V thresholds, the MAX6806US26-T uses a 4-pin SOT143 package with MR pin, whereas MAX6326UR26-T is a 3-pin SOT23 without MR. PCB layout, footprint, and firmware handling of manual reset would require revision. Electrical compatibility alone does not ensure drop-in substitution.
Is the RESET output of the MAX6806US26-T push-pull or open-drain?
The MAX6806US26-T features an active-low push-pull RESET output - meaning it actively drives both logic-low and logic-high states without requiring an external pullup resistor. This differs from the MAX6808 series (open-drain) and enables direct interfacing with standard µP reset inputs that expect driven high/low levels.
MAX6806US26-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 30µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX6806US26-T FAQ
1.How can I place an order for MAX6806US26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806US26-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 MAX6806US26-T reliable?
The price and inventory of MAX6806US26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806US26-T is usually 5 days.
3.What payment methods are accepted for MAX6806US26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806US26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806US26-T?
MAX6806US26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806US26-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 MAX6806US26-T?
For technical support, including MAX6806US26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806US26-T requirements.
6.How does Aetrix verify that MAX6806US26-T is sourced from the original manufacturer or authorized distributors?
All MAX6806US26-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 MAX6806US26-T meets industry standards.
7.What is the process for return or replacement of MAX6806US26-T?
All MAX6806US26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806US26-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 MAX6806US26-T part is unused and in its original packaging.
Return procedure for MAX6806US26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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