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Analog Devices Inc./Maxim Integrated MAX8211CPA+
- Part No.:
- MAX8211CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX8211CPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:168
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Product details
Overview
The MAX8211CPA+ from Analog Devices is a CMOS micropower voltage detector IC designed to monitor supply rails and provide power-fail warning to microprocessors. It features a 1.15V internal bandgap reference, ±40mV threshold accuracy (±3.5%), 5µA quiescent current, 7mA current-limited open-drain output sink, and operates across a 2.0V to 16.5V supply range. It is used in undervoltage detection circuits for logic-supply monitoring in embedded control systems.
For engineers reviewing the MAX8211CPA+ datasheet, MAX8211CPA+ pinout, MAX8211CPA+ application, or MAX8211CPA+ equivalent, key selection considerations include programmable trip voltage via external resistor divider, built-in hysteresis output for noise immunity, temperature-stable threshold (−200 ppm/°C), and compatibility with legacy ICL8211 designs at reduced supply current.
Technical Context
The MAX8211CPA+ implements a precision comparator architecture with an on-chip 1.15V bandgap reference and low-leakage MOSFET THRESH input (≤10nA). Its open-drain n-channel output activates when THRESH voltage falls below the reference, sinking up to 7mA - enabling direct LED drive without series resistors.
Hysteresis is implemented via a dedicated open-drain p-channel HYST output that supplies positive feedback to the resistor divider network. The THRESH–HYST voltage disparity is tightly controlled at ±0.1mV, eliminating output chatter under noisy conditions while supporting user-defined hysteresis width via R3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports operation across standard logic and industrial supply rails without external regulation. |
| Quiescent Current | 5µA typical - enables battery-backed systems to maintain supervision for years without significant drain. |
| Threshold Accuracy | ±40mV (±3.5%) at +25°C - ensures reliable trip-point repeatability across production units without calibration. |
| Output Sink Current | 7mA typical - allows direct interface to LEDs, optocouplers, or logic inputs without external driver transistors. |
| Threshold Tempco | −200 ppm/°C - minimizes drift over −0°C to +70°C operating range, critical for stable undervoltage lockout. |
| Hysteresis Output Drive | Up to 10mA - provides sufficient current to inject precise positive feedback into high-impedance dividers. |
| THRESH Input Leakage | ≤10nA - permits use of MΩ-range divider resistors, reducing system power consumption and thermal noise sensitivity. |
Pinout & Package
MAX8211CPA+ is housed in an 8-pin plastic DIP package (P8-1), through-hole mountable, RoHS-compliant, with 0.3″ wide body and 0.1″ pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - THRESH | Comparator input | Accepts divided-down supply voltage; triggers output when <1.15V; leakage ≤10nA enables high-Z resistor networks. |
| 2 - HYST | Hysteresis output | Open-drain p-channel output; supplies positive feedback current to THRESH node for noise-immune switching. |
| 3 - N.C. | No connect | Internally unconnected; must remain floating or grounded per layout guidelines - no routing required. |
| 4 - V+ | Positive supply | Primary power input; supports 2.0V–16.5V; absolute max 18V - exceeds ICL8211 rating but requires derating above 16.5V. |
| 5 - GND | Ground reference | Analog and digital ground return; must be low-impedance path to minimize threshold error from ground bounce. |
| 6 - N.C. | No connect | Internally unconnected; electrically isolated - no PCB trace or pad needed. |
| 7 - N.C. | No connect | Internally unconnected; not bonded - leave unpopulated on board. |
| 8 - OUT | Main output | Open-drain n-channel output; sinks 7mA max; asserts low during undervoltage condition; requires external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable trip voltage | Set via two external resistors (R1/R2) referenced to 1.15V internal bandgap - eliminates need for trim pots or multiple fixed-threshold parts. |
| Integrated hysteresis output | Dedicated HYST pin delivers up to 10mA with ±0.1mV matching to THRESH - enables robust noise rejection without external op-amps or comparators. |
| Low-power supervision | 5µA supply current at 5V - extends battery life in portable or backup systems where continuous monitoring is required. |
| ICL8211 drop-in replacement | Pin-compatible and functionally equivalent to bipolar ICL8211 in 8-pin DIP footprint - allows upgrade to lower-power, higher-accuracy CMOS solution without PCB change. |
| Stable over temperature | −200 ppm/°C threshold drift and guaranteed operation from −0°C to +70°C - ensures consistent reset behavior across commercial environments. |
Applications
| Logic-Supply Undervoltage Detection | Battery Backup Switchover |
|---|---|
Use Scenario: Monitoring a 5.0V nominal logic supply to detect drop below 4.5V - the minimum valid level for TTL/CMOS systems. IC Role / Device Role / Timing Role: Voltage supervisor providing clean, hysteresis-stabilized reset signal to microcontroller upon supply sag. Use Value: Prevents erratic MCU operation or data corruption by asserting reset before VCC crosses logic threshold, using only three external resistors. | Use Scenario: Detecting main supply failure in a dual-rail system (e.g., 5V main + 3.3V backup) to trigger automatic switchover to battery. IC Role / Device Role / Timing Role: Supervisory comparator initiating seamless power-path handoff via external analog switch or OR-ing controller. Use Value: Enables uninterrupted operation during AC loss or battery depletion events, with <40µs response time and no software dependency. |
| Microprocessor Power-Fail Warning | Industrial Power-Supply Fault Monitoring |
Use Scenario: Providing early warning of impending power loss to an embedded μP, allowing safe shutdown, EEPROM save, or state preservation. IC Role / Device Role / Timing Role: Dedicated hardware-level alert generator feeding non-maskable interrupt (NMI) line prior to brownout. Use Value: Delivers deterministic 1.5ms turn-off delay after threshold breach - sufficient time for critical firmware execution without watchdog timeout. | Use Scenario: Monitoring 12V or 15V industrial power rails for overvoltage, undervoltage, or transient faults in PLC or motor-control cabinets. IC Role / Device Role / Timing Role: Standalone fault detector interfacing with safety relay or FPGA-based protection logic. Use Value: Operates reliably up to 16.5V supply with ±40mV accuracy - meets IEC 61000-4-5 surge immunity requirements when combined with TVS clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803DBZT | Fixed 3.08V threshold; no programmability; 0.9μA IQ; SOT-23-3 package | Suitable only for single-rail fixed-threshold monitoring; lacks hysteresis output and resistor-programmable flexibility | Select when board space is constrained and trip point matches standard logic supply; not suitable for custom thresholds or noise-prone environments. |
| MAX6326UT29D3+ | Fixed 2.93V threshold; 1.6μA IQ; 3-pin SOT-23; no HYST pin or THRESH input | Designed for simple reset generation only; no support for overvoltage detection or external hysteresis tuning | Choose for cost-sensitive, space-limited applications requiring basic reset assertion - cannot replace MAX8211CPA+ in programmable or dual-mode (UV/OV) designs. |
Compared with TLV803DBZT and MAX6326UT29D3+, the MAX8211CPA+ uniquely supports user-defined trip voltages across 2V–16.5V rails, integrates a dedicated hysteresis output for noise immunity, and maintains pin compatibility with legacy ICL8211 designs - making it the only option for field-upgradeable, high-accuracy, multi-rail supervision.
Availability
MAX8211CPA+ is available at Aetrix Electronics and suitable for microprocessor voltage monitoring, battery-backup switchover, and industrial power-supply fault monitoring requiring stable component supply and long-term obsolescence management.
Supply support for MAX8211CPA+ 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 MAX8211CPA+ belongs to the MAX821x family of programmable voltage supervisors, engineered specifically for reliable, low-power, and noise-immune power-rail monitoring in mission-critical embedded systems.
FAQ
What is the maximum supply voltage the MAX8211CPA+ can tolerate?
The MAX8211CPA+ has an absolute maximum supply voltage rating of +18V, but its guaranteed operating range is 2.0V to 16.5V. Operation above 16.5V risks exceeding power dissipation limits and is not recommended. The device is rated for continuous operation up to 16.5V, with derated power dissipation above +70°C ambient.
Does the MAX8211CPA+ require external components to function as a voltage detector?
Yes, the MAX8211CPA+ requires at least two external resistors (R1 and R2) to form a voltage divider that scales the monitored rail to the 1.15V internal reference at the THRESH pin. A third resistor (R3) is optional but recommended to enable hysteresis via the HYST output. No capacitors or active devices are needed for basic operation.
Can the MAX8211CPA+ be used for overvoltage detection?
No - the MAX8211CPA+ is configured for undervoltage detection only: its output activates when the THRESH pin voltage falls *below* 1.15V. For overvoltage detection, the MAX8212 variant must be used, which triggers when THRESH exceeds 1.15V. The MAX8211CPA+ pinout and internal logic are not reconfigurable for OV mode.
Is the MAX8211CPA+ pin-compatible with the ICL8211?
Yes, the MAX8211CPA+ is a plug-in replacement for the bipolar ICL8211 in 8-pin DIP packages. Pin assignments (THRESH, HYST, V+, GND, OUT) match exactly, and electrical behavior is functionally equivalent - though the MAX8211CPA+ offers lower quiescent current, tighter threshold tolerance, and higher hysteresis output drive.
What is the purpose of the HYST pin on the MAX8211CPA+?
The HYST pin on the MAX8211CPA+ is an open-drain p-channel output that supplies positive feedback current to the THRESH node via external resistor R3. This creates user-adjustable hysteresis - widening the gap between turn-on and turn-off thresholds to prevent output oscillation in noisy voltage environments. Its ±0.1mV matching to THRESH ensures precise dead-band control.
MAX8211CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX8211CPA+ FAQ
1.How can I place an order for MAX8211CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211CPA+ 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 MAX8211CPA+ reliable?
The price and inventory of MAX8211CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211CPA+ is usually 5 days.
3.What payment methods are accepted for MAX8211CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211CPA+?
MAX8211CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211CPA+ 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 MAX8211CPA+?
For technical support, including MAX8211CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211CPA+ requirements.
6.How does Aetrix verify that MAX8211CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX8211CPA+ 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 MAX8211CPA+ meets industry standards.
7.What is the process for return or replacement of MAX8211CPA+?
All MAX8211CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211CPA+, 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 MAX8211CPA+ part is unused and in its original packaging.
Return procedure for MAX8211CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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