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Analog Devices Inc./Maxim Integrated MAX8211CUA+
- Part No.:
- MAX8211CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX8211CUA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
MAX8211CUA+ from Analog Devices is a CMOS micropower voltage detector IC that monitors supply rails for microprocessor power-fail warning, providing programmable undervoltage detection via external resistor divider and 1.15V internal bandgap reference. It features 5µA quiescent current, ±40mV threshold accuracy, 7mA current-limited open-drain output sink, and operates from 2.0V to 16.5V supply. Used in battery-backup switching and low-battery detection circuits.
For engineers reviewing the MAX8211CUA+ datasheet, MAX8211CUA+ pinout, MAX8211CUA+ application, or MAX8211CUA+ equivalent, key selection criteria include threshold accuracy (±40mV), hysteresis output capability, current-limited output (7mA typ), µMAX-8 package footprint, and compatibility with ICL8211-based legacy designs requiring <16.5V operation.
Technical Context
The MAX8211CUA+ integrates a precision 1.15V bandgap reference, high-impedance comparator with THRESH input, open-drain n-channel output stage with 7mA current limiting, and open-drain p-channel hysteresis (HYST) output. Its threshold trip point is set externally using two resistors, enabling flexible undervoltage detection across 2.0V–16.5V supplies.
Unlike the MAX8212 variant, the MAX8211CUA+ activates its output when THRESH voltage falls *below* 1.15V, making it suitable for undervoltage monitoring. The HYST output enables noise-immune switching via positive feedback, with hysteresis magnitude adjustable by external resistor R3 per Figure 3 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports logic and analog rail monitoring without external regulators |
| Quiescent Current | 5µA typ - enables long-life battery-powered systems with minimal standby drain |
| Threshold Accuracy | ±40mV (±3.5%) - ensures reliable trip point across temperature and supply variation |
| Output Sink Current | 7mA typ - directly drives LEDs or logic inputs without series resistors |
| Hysteresis Output | Open-drain p-channel - provides programmable positive feedback for chatter-free switching |
| Threshold Tempco | -200ppm/°C - maintains stable trip point over -0°C to +70°C operating range |
| Input Leakage | 0.01nA to 20nA - allows use of high-value resistor dividers (up to 10MΩ) for ultra-low system current |
Pinout & Package
The MAX8211CUA+ is housed in an 8-pin µMAX package (U8-1), measuring 3mm × 3mm × 0.8mm, with exposed pad for thermal enhancement and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - THRESH | Comparator input | High-impedance MOSFET gate; accepts divided supply voltage to compare against 1.15V reference |
| 2 - HYST | Hysteresis output | Open-drain p-channel; sinks current to add positive feedback at THRESH node for noise immunity |
| 3 - N.C. | No connect | Internally unconnected; must be left floating or tied to GND (not V+) |
| 4 - V+ | Positive supply | Primary power input; powers internal reference and comparator; max 16.5V absolute rating |
| 5 - GND | Ground reference | Analog and digital ground return; required for reference stability and output operation |
| 6 - N.C. | No connect | Internally unconnected; must be left floating or tied to GND |
| 7 - N.C. | No connect | Internally unconnected; must be left floating or tied to GND |
| 8 - OUT | Main output | Open-drain n-channel; sinks up to 7mA when THRESH < 1.15V; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Undervoltage Detection | External resistor divider sets trip point precisely; supports wide input range (2V–16.5V) without redesign |
| Current-Limited Output Stage | 7mA typical sink current prevents latch-up or damage when driving LEDs or logic gates directly |
| On-Chip Hysteresis Output | Separate HYST pin enables user-defined hysteresis width via R3, eliminating external op-amps or comparators |
| Low-Leakage Threshold Input | THRESH input leakage ≤20nA allows >10MΩ resistor networks, reducing total system current by >90% vs bipolar alternatives |
| ICL8211 Drop-In Replacement | Pin-compatible and functionally equivalent to ICL8211 in <16.5V applications, with lower IQ and tighter reference tolerance |
Applications
| Battery-Backup Switching | Microprocessor Power-Fail Warning |
|---|---|
Use Scenario: Detects main supply drop below safe operating level to trigger switchover to backup battery before brownout. IC Role / Device Role / Timing Role: Voltage monitor asserting reset or interrupt signal to microcontroller upon undervoltage condition. Use Value: Prevents data corruption during power transition by ensuring clean, hysteresis-stabilized switchover timing. | Use Scenario: Monitors 3.3V or 5V logic supply in embedded controllers to warn of imminent power loss. IC Role / Device Role / Timing Role: Generates non-maskable interrupt (NMI) or reset pulse when supply falls below programmed threshold. Use Value: Enables firmware to save critical state or initiate graceful shutdown within guaranteed 1.5ms t(off) response window. |
| Low-Battery Detection | Power-Supply Fault Monitoring |
Use Scenario: Tracks lithium coin-cell or alkaline battery voltage to flag end-of-life before system failure. IC Role / Device Role / Timing Role: Threshold comparator triggering LED indicator or host MCU alert when cell voltage drops below 2.2V. Use Value: Achieves >10-year battery life due to 5µA quiescent current and supports high-resistor dividers (e.g., 10MΩ + 1MΩ). | Use Scenario: Verifies regulated DC-DC converter output stability in industrial PLCs or telecom power modules. IC Role / Device Role / Timing Role: Standalone fault detector asserting fault flag if output deviates beyond ±5% of nominal 12V rail. Use Value: Provides deterministic, sub-100µs response to overvoltage/undervoltage events without software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803DBZT | Fixed 3.08V threshold; no external programming; 1.8V–6V supply range; 0.5µA IQ | Limited to single-rail monitoring; unsuitable for programmable or wide-input applications | Select when fixed threshold suffices and ultra-low IQ (<1µA) is prioritized over flexibility |
| MAX6326UT46D3+ | Fixed 4.63V threshold; push-pull output; 1.6V–5.5V supply; 1.6µA IQ; built-in watchdog timer | Includes watchdog functionality but lacks hysteresis output and programmability | Choose when combined reset + watchdog required on 3.3V/5V rails and hysteresis is not needed |
Compared with TLV803DBZT and MAX6326UT46D3+, the MAX8211CUA+ uniquely supports user-defined trip points across 2V–16.5V, delivers 7mA output drive, and provides a dedicated HYST pin for robust noise immunity-making it optimal for legacy ICL8211 upgrades and multi-rail industrial monitoring where flexibility and reliability are critical.
Availability
MAX8211CUA+ is available at Aetrix Electronics and suitable for battery-backed memory systems, microprocessor reset supervision, and industrial power-supply fault detection requiring stable component supply and long-term lifecycle support.
Supply support for MAX8211CUA+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX8211CUA+ belongs to Analog Devices' precision voltage supervisor product line, designed specifically for reliable, low-power, programmable power-rail monitoring in space-constrained and battery-sensitive applications.
FAQ
What is the primary function of the MAX8211CUA+?
The MAX8211CUA+ is a programmable undervoltage detector IC that asserts an open-drain output when the voltage at its THRESH pin falls below its internal 1.15V reference. It is used to monitor power supplies and generate reset or interrupt signals in microprocessor systems. The MAX8211CUA+ supports external resistor-based trip-point configuration and includes a dedicated hysteresis output (HYST) for noise-immune switching.
Does the MAX8211CUA+ support overvoltage detection?
No, the MAX8211CUA+ is configured for undervoltage detection only: its output activates when THRESH voltage drops *below* 1.15V. For overvoltage detection, the MAX8212CUA+ variant is required, which triggers when THRESH exceeds 1.15V. The MAX8211CUA+ datasheet explicitly defines its functional role as undervoltage monitoring, and its block diagram and electrical characteristics confirm this asymmetric behavior.
What is the maximum supply voltage rating for the MAX8211CUA+?
The MAX8211CUA+ has an absolute maximum supply voltage rating of +18V, but its guaranteed operating supply voltage range is 2.0V to 16.5V. Operation above 16.5V violates the specified operating conditions and risks parametric failure or reduced reliability. This limit is documented in both the Absolute Maximum Ratings table and the Guaranteed Operating Supply Voltage Range specification.
Can the MAX8211CUA+ drive an LED directly without a current-limiting resistor?
Yes, the MAX8211CUA+ can drive an LED directly because its output is current-limited to 7mA typical. When the output is active (sinking), the internal transistor limits current to prevent damage-even with V+ applied directly to the LED anode and no external resistor. This feature is explicitly stated in the Detailed Description section and confirmed by the "Define Output Current Limit (MAX8211)" feature bullet.
Is the MAX8211CUA+ pin-compatible with the ICL8211?
Yes, the MAX8211CUA+ is a plug-in replacement for the ICL8211 in applications where the supply voltage remains below 16.5V. The datasheet confirms identical pinout (8-pin DIP/SO/µMAX/TO-99), same functional assignment (THRESH, HYST, OUT, V+, GND), and direct substitution capability-while offering improved specs including lower quiescent current (5µA vs ~100µA), tighter reference tolerance, and higher hysteresis output current.
MAX8211CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- <1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX8211CUA+ FAQ
1.How can I place an order for MAX8211CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211CUA+ 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 MAX8211CUA+ reliable?
The price and inventory of MAX8211CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211CUA+ is usually 5 days.
3.What payment methods are accepted for MAX8211CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211CUA+?
MAX8211CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211CUA+ 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 MAX8211CUA+?
For technical support, including MAX8211CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211CUA+ requirements.
6.How does Aetrix verify that MAX8211CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX8211CUA+ 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 MAX8211CUA+ meets industry standards.
7.What is the process for return or replacement of MAX8211CUA+?
All MAX8211CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211CUA+, 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 MAX8211CUA+ part is unused and in its original packaging.
Return procedure for MAX8211CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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