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Analog Devices Inc./Maxim Integrated MAX8212CUA
- Part No.:
- MAX8212CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX8212CUA.pdf
- Description:
- IC SUPERVISOR MPU VOLT MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:148
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Product details
Overview
MAX8212CUA from Maxim Integrated is a CMOS micropower voltage detector IC that monitors supply voltage for microprocessors and triggers an open-drain output when threshold voltage exceeds 1.15V. It features ±40mV (±3.5%) threshold accuracy, 5µA quiescent current, 2.0V–16.5V supply range, and high-output-current capability (up to 35mA typical) for direct drive of logic or optocouplers in undervoltage/overvoltage detection circuits.
For engineers reviewing the MAX8212CUA datasheet, MAX8212CUA pinout, MAX8212CUA application, or MAX8212CUA equivalent, this device serves as a plug-in replacement for ICL8212 in low-power µP monitoring systems where supply voltage remains below 16.5V and precise, noise-immune trip-point control with external resistor programming is required.
Technical Context
The MAX8212CUA implements a comparator-based voltage monitor with an internal 1.15V bandgap reference and open-drain n-channel output stage activated when THRESH > 1.15V. Its hysteresis output (HYST) provides up to 10mA sink capability and enables programmable positive feedback via external resistor R3 to eliminate noise-induced chatter.
Unlike the current-limited MAX8211, the MAX8212CUA has no built-in output current limit-designers must externally constrain sink current to ≤50mA and ensure power dissipation stays within 471mW (SO-8) or 392mW (µMAX-8) limits at +70°C ambient. Threshold temperature coefficient is -200ppm/°C, and supply-voltage rejection is ±0.2mV over V+ = 4.5V–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports wide-input industrial and battery-backed systems without external regulation |
| Threshold Trip Voltage | 1.15V (typical) - sets precise detection point using external resistor divider on THRESH pin |
| Threshold Accuracy | ±40mV (±3.5%) - ensures reliable trip-point consistency across production and temperature |
| Quiescent Current | 5µA - enables multi-year operation in battery-powered backup monitoring |
| Output Sink Capability | 35mA (typical at VTH=1.3V) - drives LEDs, optocouplers, or logic inputs directly without buffer transistors |
| Hysteresis Output Current | 10mA (max) - supplies sufficient feedback current to generate stable, chatter-free switching windows |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and instrumentation |
Pinout & Package
MAX8212CUA is housed in an 8-pin µMAX package (package code 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. All N.C. pins must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| THRESH (Pin 1) | Comparator input | Accepts divided-down monitored voltage; output activates when voltage exceeds 1.15V |
| HYST (Pin 2) | Hysteresis feedback output | Open-drain p-channel output used to inject positive feedback into resistor divider for noise immunity |
| V+ (Pin 4) | Positive supply | Power rail input (2.0V–16.5V); also serves as reference for HYST output voltage swing |
| GND (Pin 5) | Ground reference | Analog and digital ground return; must be low-impedance for accurate threshold sensing |
| OUT (Pin 8) | Main output driver | Open-drain n-channel output sinks up to 35mA; requires external pull-up for logic-level signaling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable trip voltage | Set via two external resistors - enables custom undervoltage or overvoltage detection thresholds from 2V to >16V |
| On-board hysteresis output | 10mA-capable HYST pin eliminates need for external op-amp or comparator in feedback path |
| Low-leakage THRESH input | 20nA max input current - permits use of high-value (≤10MΩ) resistors in divider network, minimizing system current drain |
| Plug-in ICL8212 replacement | Same pinout and function as bipolar ICL8212 - allows drop-in upgrade with lower power and tighter tolerance |
| Stable over temperature | -200ppm/°C threshold drift - maintains trip-point accuracy across 0°C to +70°C operating range |
Applications
| Battery-Backup Switching | Power-Supply Fault Monitoring |
|---|---|
Use Scenario: Detecting main supply failure in systems with secondary battery backup, triggering automatic switchover before brownout. IC Role / Device Role / Timing Role: Voltage monitor asserting active-low fault signal to enable backup regulator or disable primary load. Use Value: 5µA quiescent current preserves battery life during standby; ±40mV threshold accuracy prevents false switchover during line ripple. | Use Scenario: Monitoring DC output of AC/DC or DC/DC converters for overvoltage, undervoltage, or dropout events. IC Role / Device Role / Timing Role: Standalone supervisor providing fail-safe shutdown signal to system controller or protection circuitry. Use Value: 35mA output sink drives optocoupler input directly, enabling galvanically isolated fault reporting without additional components. |
| µP Voltage Monitoring | Low-Battery Detection |
Use Scenario: Ensuring microprocessor operates only within valid supply range (e.g., 4.5V–5.5V for 5V logic) to prevent corruption or reset instability. IC Role / Device Role / Timing Role: Dedicated voltage supervisor generating NMI or RESET signal when VCC falls below safe level. Use Value: Programmable threshold allows precise match to µP VCC min/max specs; hysteresis prevents oscillation near trip point. | Use Scenario: Detecting end-of-life voltage in single-cell Li-ion or multi-cell alkaline battery packs powering portable instruments. IC Role / Device Role / Timing Role: Threshold comparator feeding battery gauge or fuel-gauge MCU input or driving LED indicator. Use Value: 2.0V minimum supply enables operation down to deeply discharged battery states; ±3.5% accuracy ensures consistent low-battery warning timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8212CSA | Same electrical specs; SO-8 package (4.9mm × 6.0mm) vs. µMAX-8 (3.0mm × 3.0mm) | Requires PCB layout change due to larger footprint and different thermal pad structure | Select MAX8212CSA only if µMAX assembly infrastructure is unavailable or thermal constraints favor SO-8's higher 471mW dissipation rating |
| TLV809E | Fixed 3.08V threshold, no hysteresis output, 1.8V–6.0V supply range, 0.5µA IQ | Lacks programmability and HYST feedback; suitable only for fixed-threshold, ultra-low-power applications | Choose TLV809E only when threshold is fixed and board space/power budget prioritize minimal IQ over flexibility |
Compared with MAX8212CSA and TLV809E, the MAX8212CUA uniquely combines programmable trip voltage, integrated hysteresis feedback, and compact µMAX packaging-making it optimal for space-constrained, battery-sensitive designs requiring custom over/undervoltage response.
Availability
MAX8212CUA is available at Aetrix Electronics and suitable for battery-backed computing, industrial power-supply supervision, and portable instrumentation requiring stable component supply with guaranteed commercial-temperature performance and long-term traceability.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX8212CUA belongs to Maxim's voltage supervisor product line, designed specifically for precision, low-power, programmable supply monitoring in microprocessor-based systems where reliability and design flexibility are critical.
FAQ
What is the exact threshold voltage of the MAX8212CUA, and how is it set?
The MAX8212CUA has a nominal internal threshold voltage of 1.15V. This value is fixed and used as the reference point against which the external voltage applied to the THRESH pin is compared. The actual trip voltage at the monitored supply (e.g., VIN) is set by a resistor divider network (R1/R2) connected to THRESH, allowing full programmability from ~2V to beyond 16V. The MAX8212CUA datasheet provides explicit formulas for calculating R1 and R2 based on desired upper/lower trip points and hysteresis requirements.
Does the MAX8212CUA include built-in current limiting on its OUT pin?
No, the MAX8212CUA does not include built-in current limiting on its OUT pin-unlike the MAX8211, which limits sink current to 7mA. The MAX8212CUA output can sink up to 35mA (typical) but must be externally current-limited to ≤50mA per Absolute Maximum Ratings. Designers must verify power dissipation (V×I) stays within the µMAX package's 392mW limit at maximum ambient temperature to avoid thermal overload. This behavior is explicitly documented in Note 2 of the MAX8212CUA datasheet.
Can the MAX8212CUA replace an ICL8212 in existing designs without changes?
Yes, the MAX8212CUA is specified as a plug-in replacement for the ICL8212 in applications where supply voltage remains ≤16.5V. It shares identical pinout (including N.C. assignments), functional behavior (THRESH > 1.15V activates OUT), and compatible voltage ranges. However, due to higher gain and CMOS input characteristics, stability in closed-loop configurations (e.g., programmable zeners) may require re-evaluation of external compensation components. Always validate loop stability when replacing ICL8212 with MAX8212CUA.
What is the role of the HYST pin on the MAX8212CUA, and how is it used?
The HYST pin on the MAX8212CUA is an open-drain p-channel output used to inject programmable positive feedback into the THRESH resistor divider, creating hysteresis to prevent output chatter near the trip point. When THRESH exceeds 1.15V, HYST turns on and sinks up to 10mA. A resistor (R3) connects HYST to the THRESH node, shifting the effective threshold upward during rising input and downward during falling input. The magnitude of hysteresis is calculated using R1, R2, and R3 values per the MAX8212CUA datasheet equations.
Is the MAX8212CUA suitable for automotive applications?
No, the MAX8212CUA is rated for 0°C to +70°C (Commercial temperature range) and is not qualified for automotive AEC-Q100 stress testing or extended temperature operation. For automotive applications requiring voltage monitoring, designers should consider Maxim's automotive-grade alternatives such as the MAX6326 series (−40°C to +125°C, AEC-Q100 qualified) or equivalent devices from other manufacturers. The MAX8212CUA is intended for commercial and industrial equipment where ambient conditions remain within its specified range.
MAX8212CUA 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:
- 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-µMAX
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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