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Analog Devices Inc./Maxim Integrated MAX8212ESA+
- Part No.:
- MAX8212ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX8212ESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:782
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Product details
Overview
The MAX8212ESA+ from Analog Devices is a CMOS micropower voltage detector designed to monitor supply rails and trigger microprocessor power-fail warnings. It features a 1.15V internal bandgap reference, open-drain n-channel output, programmable threshold via external resistors, ±40mV (±3.5%) threshold accuracy, and operates across 2.0V–16.5V supply range. It is used in undervoltage/overvoltage detection for industrial power supplies and battery-backed systems.
For engineers reviewing the MAX8212ESA+ datasheet, MAX8212ESA+ pinout, MAX8212ESA+ application, or MAX8212ESA+ equivalent, key selection criteria include its non-current-limited output stage (vs. MAX8211's 7mA sink), hysteresis feedback capability, SO-8 package compatibility, and -40°C to +85°C industrial temperature rating.
Technical Context
The MAX8212ESA+ implements a comparator-based voltage monitoring architecture with an internal 1.15V precision reference and open-drain output that activates when the THRESH pin voltage exceeds the reference. Its HYST pin provides an open-drain p-channel output for positive feedback, enabling user-defined hysteresis without external op-amps.
Unlike the current-limited MAX8211, the MAX8212ESA+ output stage has no built-in current limit and typically sinks 35mA at VTH = 1.3V - requiring external current limiting in LED or relay drive applications. Threshold input leakage is ≤10nA (typ), supporting high-impedance resistor dividers up to 10MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports direct monitoring of 3.3V, 5V, and 12V rails without level-shifting. |
| Threshold Accuracy | ±40mV (±3.5%) at +25°C - enables reliable trip-point setting within 4.5V ±150mV for logic-supply monitoring. |
| Quiescent Current | 5µA (typ) - allows continuous operation in battery-critical applications like backup SRAM supervisors. |
| Output Type | Open-drain n-channel - requires external pull-up; compatible with 1.8V–16.5V logic families and optocoupler inputs. |
| Hysteresis Output | Open-drain p-channel with 10mA max sink - delivers configurable hysteresis without additional active components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, telecom power modules, and automotive body electronics. |
| Threshold Tempco | -200ppm/°C - ensures stable trip points over temperature, critical for unregulated DC-DC outputs. |
Pinout & Package
MAX8212ESA+ is housed in an 8-pin SO (Small Outline) package per package code S8-2, RoHS-compliant, with standard 1.27mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - THRESH | Comparator input | Accepts divided rail voltage; low-leakage MOSFET input (≤10nA) enables use of MΩ-range divider resistors. |
| 2 - HYST | Hysteresis output | Open-drain p-channel; sinks up to 10mA to inject positive feedback into THRESH node for noise immunity. |
| 3 - N.C. | No connect | Internally unconnected; must be left floating or tied to GND - no routing or loading required. |
| 4 - V+ | Positive supply | Power input for internal reference and comparator; accepts 2.0V–16.5V; decoupling capacitor recommended. |
| 5 - GND | Ground reference | Analog and digital ground return; must be low-impedance path to system common. |
| 6 - N.C. | No connect | Internally unconnected; no electrical function; PCB pad may be omitted or grounded for thermal relief. |
| 7 - N.C. | No connect | Internally unconnected; no signal or power role; avoid routing traces to this pin. |
| 8 - OUT | Main output | Open-drain n-channel; activates (pulls low) when THRESH > 1.15V; not current-limited - external series resistor needed for LED drive. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable threshold | Set via two external resistors - supports custom trip points from 1.2V to >16V without trimming or calibration. |
| On-board hysteresis output | Dedicated HYST pin eliminates need for external op-amp or comparator in noise-prone environments. |
| Low quiescent current | 5µA typical supply draw - extends battery life in always-on supervisory circuits by >10× vs. bipolar predecessors. |
| Improved reference accuracy | ±40mV threshold tolerance - reduces need for potentiometer adjustment and improves BOM consistency. |
| Plug-in replacement for ICL8212 | Same pinout and functional behavior as legacy bipolar part - enables drop-in upgrade with lower power and higher precision. |
Applications
| Industrial Power-Supply Monitoring | Microcontroller Reset Supervision |
|---|---|
Use Scenario: Continuous monitoring of 12V DC-DC converter output in PLC power modules. IC Role / Device Role / Timing Role: Voltage detector asserting fault flag when output drops below 11.4V or rises above 12.6V. Use Value: Prevents firmware corruption during brownout by triggering system reset before MCU enters undefined state. | Use Scenario: Supervising 3.3V core supply of ARM Cortex-M4 in edge gateway hardware. IC Role / Device Role / Timing Role: Generating clean, hysteresis-stabilized reset pulse when supply falls below 3.0V. Use Value: Eliminates false resets caused by transient noise on 3.3V rail due to integrated HYST feedback path. |
| Battery Backup Switchover | Telecom Line Card Undervoltage Protection |
Use Scenario: Detecting main 5V supply failure to initiate switchover to Li-ion backup in real-time clock module. IC Role / Device Role / Timing Role: Threshold set to 4.75V; OUT drives MOSFET gate via pull-up to enable backup path. Use Value: Ensures uninterrupted RTC operation with <100µs response time and no external timing capacitors. | Use Scenario: Monitoring -48V telecom supply in line card shelf; detecting sag below -45V. IC Role / Device Role / Timing Role: Resistor divider scales -48V to ~1.15V at THRESH; HYST adds 150mV hysteresis. Use Value: Prevents spurious alarms during load transients while maintaining fast 250µs turn-on delay for fault reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8211ESA+ | Current-limited 7mA output sink; activates on THRESH < 1.15V (undervoltage mode only) | Preferred for simple reset generation where output current limiting is required (e.g., direct LED indicator) | Select MAX8211ESA+ when undervoltage-only detection and built-in current limiting simplify design. |
| TLV809E33DBZR | Fixed 3.08V threshold; no external resistor programming; 1.8V–6V supply range; 1.6µA quiescent current | Suitable only for fixed-threshold applications; lacks hysteresis output and wide-voltage flexibility | Choose TLV809E33DBZR for cost-sensitive, single-rail 3.3V systems where programmability is unnecessary. |
Compared with MAX8211ESA+, the MAX8212ESA+ offers overvoltage detection capability and higher output drive, while TLV809E33DBZR trades programmability and voltage range for ultra-low power and lower BOM count in fixed-rail designs.
Availability
MAX8212ESA+ is available at Aetrix Electronics and suitable for industrial power-supply monitoring, microcontroller reset supervision, and battery backup switchover requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX8212ESA+ 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 MAX8212ESA+ belongs to the MAX8211/MAX8212 family of programmable voltage monitors, engineered for precision power-rail supervision in space-constrained, low-power, and thermally demanding applications.
FAQ
What is the output behavior of the MAX8212ESA+?
The MAX8212ESA+ features an open-drain n-channel output that pulls low when the voltage at the THRESH pin exceeds the internal 1.15V reference. Unlike the MAX8211ESA+, it has no internal current limit - typical sink current is 35mA at VTH = 1.3V. An external pull-up resistor is required, and current-limiting must be implemented externally for loads like LEDs or relays. The MAX8212ESA+ does not source current.
Can the MAX8212ESA+ be used for overvoltage and undervoltage detection in the same circuit?
No - the MAX8212ESA+ is configured for overvoltage detection only (OUT activates when THRESH > 1.15V). For undervoltage detection, the MAX8211ESA+ is required (OUT activates when THRESH < 1.15V). Both share identical pinout and package, but their threshold polarity is fixed and not selectable. A single MAX8212ESA+ cannot perform both functions simultaneously without external logic inversion.
What is the purpose of the HYST pin on the MAX8212ESA+?
The HYST pin on the MAX8212ESA+ is an open-drain p-channel output that sources current when the THRESH voltage exceeds 1.15V. It is intended for positive feedback into the resistor divider network to introduce user-defined hysteresis - preventing output chatter during slow-moving or noisy supply transitions. Typical hysteresis values range from 50mV to 200mV, set by R3 in the application circuit.
Is the MAX8212ESA+ pin-compatible with the legacy ICL8212?
Yes - the MAX8212ESA+ is a plug-in replacement for the bipolar ICL8212 in most applications operating below 16.5V supply. It shares identical 8-pin SO packaging, pinout, and functional behavior (overvoltage detection mode), while offering improved specs: 5µA vs. ~100µA quiescent current, ±40mV vs. ±100mV threshold accuracy, and higher hysteresis output drive (10mA vs. 21µA).
What are the absolute maximum ratings for the MAX8212ESA+?
The MAX8212ESA+ has an absolute maximum supply voltage of +18V and a maximum output voltage of +18V. Input pins (THRESH, HYST) tolerate -0.5V to (V+ + 0.5V). Continuous power dissipation in the SO-8 package is 471mW at +70°C, derating 5.88mW/°C above that. Exceeding these limits risks permanent damage; operation beyond 16.5V supply is not recommended despite the 18V absolute rating.
MAX8212ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX8212ESA+ FAQ
1.How can I place an order for MAX8212ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8212ESA+ 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 MAX8212ESA+ reliable?
The price and inventory of MAX8212ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8212ESA+ is usually 5 days.
3.What payment methods are accepted for MAX8212ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8212ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8212ESA+?
MAX8212ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8212ESA+ 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 MAX8212ESA+?
For technical support, including MAX8212ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8212ESA+ requirements.
6.How does Aetrix verify that MAX8212ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX8212ESA+ 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 MAX8212ESA+ meets industry standards.
7.What is the process for return or replacement of MAX8212ESA+?
All MAX8212ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8212ESA+, 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 MAX8212ESA+ part is unused and in its original packaging.
Return procedure for MAX8212ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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