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Analog Devices Inc./Maxim Integrated MAX8212CUA+
- Part No.:
- MAX8212CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX8212CUA+.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MAX8212CUA+ from Maxim Integrated is a CMOS micropower voltage detector that monitors supply rails for overvoltage conditions and asserts an open-drain output when the threshold pin voltage exceeds 1.15V. It features ±40mV threshold accuracy, 5µA quiescent current, and operates across 2.0V–16.5V supply range. Used in µP power-fail warning circuits where precise, low-power undervoltage/overvoltage detection is required.
For engineers reviewing the MAX8212CUA+ datasheet, MAX8212CUA+ pinout, MAX8212CUA+ application, or MAX8212CUA+ equivalent, key selection criteria include programmable trip voltage via external resistors, high-output-current capability (up to 35mA sink), hysteresis control via HYST pin, and compatibility with legacy ICL8212 designs under ≤16.5V supply.
Technical Context
The MAX8212CUA+ implements a precision comparator architecture with an internal 1.15V bandgap reference and open-drain n-channel output stage activated on threshold overvoltage. Its THRESH input accepts externally divided rail voltage, while HYST provides programmable positive feedback for noise-immune switching.
Unlike the current-limited MAX8211, the MAX8212CUA+ output has no internal current limit-designers must externally constrain sink current to ≤50mA and ensure power dissipation remains within 471mW (SO-8) or 380mW (µMAX-8) limits. Hysteresis leakage is specified at ≤3µA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports logic and intermediate rail monitoring without external regulation |
| Threshold Trip Voltage | 1.15V (±40mV) - sets precise overvoltage detection point referenced to internal bandgap |
| Quiescent Current | 5µA - enables battery-backed systems to maintain supervision for years |
| Output Sink Capability | 35mA typical - drives optocouplers, MOSFET gates, or LEDs directly without buffer |
| Hysteresis Control | Open-drain HYST pin - allows user-defined dead-band via external resistor network |
| Operating Temperature | 0°C to +70°C - commercial-grade performance for non-automotive embedded applications |
| Threshold Accuracy Drift | ±200ppm/°C - ensures stable trip point across ambient temperature variations |
Pinout & Package
MAX8212CUA+ uses an 8-pin µMAX package (U8-1), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. Pin 1 is THRESH; pin 2 is HYST; pin 3 is N.C.; pin 4 is V+; pin 5 is GND; pin 6 is N.C.; pin 7 is N.C.; pin 8 is OUT. The exposed pad is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| THRESH (Pin 1) | Comparator input | Accepts externally divided supply voltage; output activates when voltage >1.15V |
| HYST (Pin 2) | Hysteresis feedback output | Open-drain p-channel output used to inject positive feedback into resistor divider |
| V+ (Pin 4) | Power supply input | Supplies internal reference and comparator; max 16.5V operating, 18V absolute max |
| GND (Pin 5) | Ground reference | Analog and digital ground return; connects to exposed thermal pad |
| OUT (Pin 8) | Open-drain output | N-channel transistor sinks current when THRESH >1.15V; no internal current limit |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Overvoltage Detection | Set trip point anywhere above 1.15V using two external resistors-no trimming required |
| High-Current Open-Drain Output | Sinks up to 35mA typical-eliminates need for external driver transistors in many interface circuits |
| User-Configurable Hysteresis | HYST pin delivers controllable positive feedback to suppress noise-induced false triggering |
| Ultra-Low Quiescent Current | 5µA supply current enables multi-year operation on coin-cell batteries in backup systems |
| ICL8212 Drop-in Compatibility | Same pinout and function as bipolar ICL8212-direct replacement where supply ≤16.5V |
Applications
| Microprocessor Power-Fail Warning | Battery-Backup Switching |
|---|---|
Use Scenario: Detects rising supply voltage during power-up or falling voltage during brownout to trigger NMI or reset assertion in µP-based systems. IC Role / Device Role / Timing Role: Voltage supervisor providing overvoltage/undervoltage fault signal to microcontroller interrupt input. Use Value: Prevents corrupted memory writes or state corruption by enabling controlled shutdown before supply collapse. | Use Scenario: Monitors main supply rail and switches system load to backup battery when main voltage drops below safe threshold. IC Role / Device Role / Timing Role: Supervisory comparator initiating automatic switchover logic via open-drain output pull-down. Use Value: Ensures uninterrupted operation of real-time clocks, SRAM, or configuration registers during AC loss. |
| Power-Supply Fault Monitoring | Low-Battery Detection |
Use Scenario: Embedded in DC-DC converter feedback loops or industrial power modules to detect output overvoltage faults before downstream damage occurs. IC Role / Device Role / Timing Role: Fast-response overvoltage detector interfacing with protection circuitry or fault latches. Use Value: Enables sub-millisecond response to overvoltage events-critical for protecting sensitive analog or digital loads. | Use Scenario: Integrated into portable medical or handheld devices to monitor primary Li-ion cell voltage and warn of end-of-charge or deep discharge. IC Role / Device Role / Timing Role: Precision threshold comparator generating flag when battery voltage falls below 3.0V or similar cutoff. Use Value: Achieves ±40mV trip accuracy-reduces false alarms caused by resistor tolerance or temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8212CSA+ | Same die, SO-8 package (5mm × 4mm); higher thermal resistance than µMAX | Better suited for prototyping or through-hole-compatible PCBs; less space-constrained layouts | Select when board area permits larger footprint and thermal management via PCB copper is preferred |
| TLV809E33DBZR | Fixed 3.3V threshold, SOT-23-3; no hysteresis pin or programmability | Limited to single-rail monitoring; no external resistor network or HYST feedback capability | Choose only for simple, cost-sensitive 3.3V rail supervision where programmability is unnecessary |
Compared with MAX8212CSA+, the MAX8212CUA+ offers superior thermal performance in compact layouts; compared with TLV809E33DBZR, it provides full programmability, hysteresis control, and overvoltage detection flexibility-making it suitable for multi-rail, noise-prone, or battery-critical systems.
Availability
MAX8212CUA+ is available at Aetrix Electronics and suitable for microprocessor voltage monitoring, battery-backup switching, and power-supply fault monitoring requiring stable component supply across commercial temperature range.
Supply support for MAX8212CUA+ 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, computing, and communications markets.
The MAX8212CUA+ belongs to Maxim's voltage supervisor product line, engineered specifically for programmable overvoltage/undervoltage detection in resource-constrained embedded systems with strict power budgets.
FAQ
What is the threshold trip voltage of the MAX8212CUA+?
The MAX8212CUA+ has a fixed internal threshold trip voltage of 1.15V, with ±40mV (±3.5%) accuracy over temperature and supply. This reference is used to compare externally divided supply voltage at the THRESH pin-output activates when THRESH exceeds 1.15V. The MAX8212CUA+ does not have an adjustable internal reference; trip point is set entirely by external resistor ratio.
How does the MAX8212CUA+ differ from the MAX8211CUA+?
The MAX8212CUA+ activates its open-drain output when THRESH voltage exceeds 1.15V (overvoltage mode), while the MAX8211CUA+ activates when THRESH falls below 1.15V (undervoltage mode). Additionally, the MAX8212CUA+ output has no internal current limit-designers must externally limit sink current to ≤50mA-whereas the MAX8211CUA+ limits output to 7mA typical. Both share identical pinout, package, and hysteresis functionality.
Can the MAX8212CUA+ be used as a direct replacement for ICL8212 in existing designs?
Yes-the MAX8212CUA+ is explicitly designed as a plug-in replacement for the bipolar ICL8212 in applications where supply voltage remains ≤16.5V. It matches the same 8-pin µMAX pinout, functional behavior, and overvoltage detection role. However, due to higher gain and CMOS input impedance, stability in closed-loop configurations (e.g., programmable zeners) may require re-evaluation of external compensation components.
What is the purpose of the HYST pin on the MAX8212CUA+?
The HYST pin on the MAX8212CUA+ is an open-drain p-channel output used to inject programmable positive feedback into the external resistor divider network. By connecting HYST to the THRESH node via R3, designers introduce hysteresis-creating separate upper and lower trip thresholds to prevent output oscillation near the decision point in noisy environments. HYST leakage is ≤3µA over full temperature range.
Does the MAX8212CUA+ support undervoltage detection?
No-the MAX8212CUA+ is configured exclusively for overvoltage detection: its output turns ON when THRESH voltage rises above 1.15V. For undervoltage detection, the MAX8211CUA+ must be used instead. Though both parts share identical packaging and pinout, their internal comparator polarity is opposite and not interchangeable for the same detection mode without circuit redesign.
MAX8212CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8212CUA+ FAQ
1.How can I place an order for MAX8212CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8212CUA+ 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 MAX8212CUA+ reliable?
The price and inventory of MAX8212CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8212CUA+ is usually 5 days.
3.What payment methods are accepted for MAX8212CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8212CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8212CUA+?
MAX8212CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8212CUA+ 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 MAX8212CUA+?
For technical support, including MAX8212CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8212CUA+ requirements.
6.How does Aetrix verify that MAX8212CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX8212CUA+ 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 MAX8212CUA+ meets industry standards.
7.What is the process for return or replacement of MAX8212CUA+?
All MAX8212CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8212CUA+, 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 MAX8212CUA+ part is unused and in its original packaging.
Return procedure for MAX8212CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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