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Analog Devices Inc./Maxim Integrated MAX8212CUA+T
- Part No.:
- MAX8212CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX8212CUA+T.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX8212CUA+T from Maxim Integrated is a CMOS micropower voltage detector IC 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, 2.0V–16.5V supply range, and high-output-current capability (up to 35mA typical) - enabling direct drive of logic inputs or small loads in microprocessor supervisory circuits.
For engineers reviewing the MAX8212CUA+T datasheet, MAX8212CUA+T pinout, MAX8212CUA+T application, or MAX8212CUA+T equivalent, this device is selected for programmable undervoltage/overvoltage detection where low power, precise trip points, noise-immune hysteresis, and compatibility with legacy ICL8212 designs are required.
Technical Context
The MAX8212CUA+T implements a comparator-based detection architecture with an internal 1.15V bandgap reference and open-drain n-channel output stage. Its THRESH input accepts externally divided supply voltages, while HYST provides an open-drain p-channel hysteresis output for positive feedback configuration.
Unlike the current-limited MAX8211, the MAX8212CUA+T output turns on when THRESH > 1.15V and delivers up to 35mA sink current without internal limiting - requiring external current control in high-load applications. Hysteresis is implemented via resistor feedback from HYST to the THRESH divider node.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports operation across logic and intermediate supply rails without external regulation. |
| Threshold Trip Voltage | 1.15V (typ) - sets precise detection point; ±40mV accuracy enables reliable 3.3V/5V rail monitoring. |
| Quiescent Current | 5µA - enables battery-backed systems to maintain supervision for years without significant drain. |
| Output Sink Current | 35mA (typ at VTH = 1.3V) - drives TTL/CMOS inputs directly or small relays without buffer stages. |
| Hysteresis Output | Open-drain p-channel - supplies up to 10mA for configurable hysteresis via external resistor network. |
| Threshold Tempco | ±200ppm/°C - ensures stable trip points across industrial temperature range (0°C to +70°C). |
Pinout & Package
MAX8212CUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 and DIP-8 footprints but with reduced board area. The package is RoHS-compliant and specified for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Input | Accepts 2.0V–16.5V supply; powers internal reference and comparator. |
| GND | Ground Reference | Return path for supply, threshold divider, and output load. |
| THRESH | Threshold Input | High-impedance MOSFET input; compares external divided voltage against 1.15V reference. |
| OUT | Open-Drain Output | N-channel transistor sinks current when THRESH > 1.15V; requires external pull-up for logic-level output. |
| HYST | Hysteresis Output | Open-drain p-channel output used for positive feedback to THRESH node to eliminate noise-induced chatter. |
| Pins 1, 3, 4, 6 | No Connect | Internally unconnected; must remain floating or grounded per layout guidelines - no routing or loading permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Detection Threshold | Set via two external resistors - enables custom trip points from 2V to >16V without changing IC. |
| On-Chip Hysteresis Control | Separate HYST output allows user-defined hysteresis magnitude using one external resistor - eliminates need for external comparators or Schmitt triggers. |
| Low-Power Supervision | 5µA supply current enables use in always-on battery-monitoring paths without compromising runtime. |
| ICL8212 Drop-in Compatibility | Same pinout and functional behavior as bipolar ICL8212 - simplifies upgrade in legacy designs with improved accuracy and lower power. |
Applications
| Microprocessor Power-Fail Warning | Battery-Backup Switchover |
|---|---|
Use Scenario: Monitors main 5V system supply and triggers NMI or reset before voltage collapses below logic threshold. IC Role / Device Role / Timing Role: Voltage detector asserting active-low interrupt signal to µP when supply drops below 4.65V. Use Value: Prevents data corruption by enabling controlled shutdown before brownout - leverages 5µA quiescent current to extend backup battery life. | Use Scenario: Detects failure of primary 3.3V rail and switches critical memory or RTC to coin-cell backup. IC Role / Device Role / Timing Role: Overvoltage/undervoltage monitor controlling analog switch or diode-OR path between main and backup sources. Use Value: Ensures seamless transition with <1.5ms response time and hysteresis to prevent oscillation during marginal supply conditions. |
| Industrial Power-Supply Fault Monitoring | Low-Battery Detection in Portable Devices |
Use Scenario: Embedded in PLC I/O module to supervise 24V DC field power and disable outputs on undervoltage. IC Role / Device Role / Timing Role: High-voltage supervisor interfacing with 24V rail via resistor divider; drives optocoupler input directly. Use Value: Supports 16.5V max supply and 35mA sink current - eliminates need for level-shifting or buffering stages in industrial interfaces. | Use Scenario: Monitors single-cell Li-ion voltage (2.5V–4.2V) to warn user or initiate sleep mode before deep discharge. IC Role / Device Role / Timing Role: Precision threshold detector with ±40mV accuracy triggering alert at 3.0V cutoff. Use Value: Enables accurate end-of-charge detection using only two external resistors and no calibration - reduces BOM count and test complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8211CUA+T | Current-limited 7mA output; activates on THRESH < 1.15V - inverse polarity vs. MAX8212CUA+T. | Suitable for undervoltage-only detection with built-in current limiting; not interchangeable without circuit redesign. | Select MAX8211CUA+T when sink current must be inherently limited and fault condition corresponds to falling supply. |
| TLV809E33DBZR | Fixed 3.3V threshold; no programmability; 1.6µA quiescent current; SOT-23-3 package. | Used for simple fixed-threshold reset generation - lacks hysteresis output and adjustable trip point. | Choose TLV809E33DBZR only for cost-sensitive, space-constrained applications where fixed 3.3V detection suffices. |
Compared with MAX8211CUA+T and TLV809E33DBZR, the MAX8212CUA+T uniquely supports programmable overvoltage detection with high-sink-current capability and dedicated hysteresis control - making it optimal for flexible, precision rail supervision where trip point and noise immunity must be tailored per design.
Availability
MAX8212CUA+T is available at Aetrix Electronics and suitable for microprocessor supervision, battery-backup switchover, industrial power-fault monitoring, and portable low-battery detection requiring stable component supply and long-term manufacturability.
Supply support for MAX8212CUA+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 and mixed-signal ICs for power management, sensing, and interface applications - with emphasis on reliability, integration, and low-power operation.
The MAX8212CUA+T belongs to Maxim's microprocessor supervisory product line, engineered specifically for programmable voltage monitoring in embedded systems where accuracy, low quiescent current, and noise-immune hysteresis are critical.
FAQ
What is the threshold trip voltage of the MAX8212CUA+T?
The MAX8212CUA+T has a nominal internal threshold trip voltage of 1.15V, with ±40mV (±3.5%) accuracy over temperature and supply variations. This reference is used to compare the externally divided input voltage at the THRESH pin - the output asserts when THRESH exceeds 1.15V. The actual trip point for system supply rails is set by resistor ratios in the external divider network.
How does the MAX8212CUA+T differ from the MAX8211CUA+T?
The MAX8212CUA+T activates its output when the THRESH pin voltage exceeds 1.15V (overvoltage mode), while the MAX8211CUA+T activates when THRESH falls below 1.15V (undervoltage mode). Additionally, the MAX8212CUA+T output is not current-limited and can sink up to 35mA, whereas the MAX8211CUA+T limits sink current to 7mA. Their pinouts are identical, but functional polarity and drive strength differ.
Can the MAX8212CUA+T be used with supply voltages above 16.5V?
No - the MAX8212CUA+T has a guaranteed operating supply voltage range of 2.0V to 16.5V, and an absolute maximum rating of 18V. Operation above 16.5V risks parametric shift or damage. For higher-voltage applications, external resistor dividers must scale the monitored rail down to fit within the 16.5V V+ limit, or alternative high-voltage supervisors should be selected.
What is the purpose of the HYST pin on the MAX8212CUA+T?
The HYST pin on the MAX8212CUA+T is an open-drain p-channel output used to inject positive feedback into the THRESH node via an external resistor. This creates user-configurable hysteresis - widening the gap between turn-on and turn-off thresholds to prevent output oscillation due to noise or slow-rising/falling supply edges. It delivers up to 10mA and is essential for robust operation in electrically noisy environments.
Is the MAX8212CUA+T pin-compatible with the legacy ICL8212?
Yes - the MAX8212CUA+T is a plug-in replacement for the bipolar ICL8212 in applications with supply voltages under 16.5V. It shares identical pinout, functional behavior (overvoltage detection), and electrical interface. However, due to higher gain and CMOS input characteristics, stability in closed-loop configurations (e.g., programmable zeners) may require compensation adjustments not needed with the ICL8212.
MAX8212CUA+T 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+T FAQ
1.How can I place an order for MAX8212CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8212CUA+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 MAX8212CUA+T reliable?
The price and inventory of MAX8212CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8212CUA+T is usually 5 days.
3.What payment methods are accepted for MAX8212CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8212CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8212CUA+T?
MAX8212CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8212CUA+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 MAX8212CUA+T?
For technical support, including MAX8212CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8212CUA+T requirements.
6.How does Aetrix verify that MAX8212CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX8212CUA+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 MAX8212CUA+T meets industry standards.
7.What is the process for return or replacement of MAX8212CUA+T?
All MAX8212CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8212CUA+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 MAX8212CUA+T part is unused and in its original packaging.
Return procedure for MAX8212CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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