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Analog Devices Inc./Maxim Integrated MAX8211CPA-2
- Part No.:
- MAX8211CPA-2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX8211CPA-2.pdf
- Description:
- IC PROGRAMABLE VOLT DET NI 8 DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
MAX8211CPA-2 from Analog Devices is a CMOS micropower voltage detector IC designed for microprocessor power-fail warning and programmable undervoltage/overvoltage monitoring. It features a 1.15V internal bandgap reference, ±40mV threshold accuracy (±3.5%), 5µA quiescent current, 7mA current-limited open-drain output sink, and an on-board hysteresis output for noise-immune switching - used in battery-backup switching and logic-supply fault detection circuits.
For engineers reviewing the MAX8211CPA-2 datasheet, MAX8211CPA-2 pinout, MAX8211CPA-2 application, or MAX8211CPA-2 equivalent, key selection criteria include threshold accuracy, supply voltage range (2.0V to 16.5V), output current limiting (7mA typical), hysteresis implementation capability, and compatibility with legacy ICL8211-based designs requiring low-power replacement.
Technical Context
The MAX8211CPA-2 integrates a precision 1.15V bandgap reference, a high-impedance comparator with THRESH input leakage <10nA, and an open-drain n-channel output stage with internal 7mA current limit. Its hysteresis output (HYST) is p-channel open-drain, enabling external positive feedback via resistor networks to set programmable hysteresis width.
Unlike the MAX8212, the MAX8211CPA-2 activates its output when THRESH voltage falls *below* the 1.15V reference - making it inherently suited for undervoltage detection. The device operates across 0°C to +70°C and supports supply voltages from 2.0V to 16.5V with ±200ppm/°C threshold temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports operation from low-voltage logic rails up to industrial 15V systems without external regulation. |
| Threshold Reference | 1.15V ±40mV (±3.5%) - enables precise, resistor-programmable trip points for custom undervoltage thresholds. |
| Quiescent Current | 5µA typical - ensures minimal standby power draw in battery-backed or energy-sensitive applications. |
| Output Sink Current | 7mA typical, current-limited - allows direct LED drive without series resistor and prevents latch-up under overcurrent. |
| Hysteresis Output | Open-drain p-channel, 10mA max - provides configurable positive feedback path to eliminate noise-induced output chatter. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and instrumentation environments. |
| Threshold Tempco | ±200ppm/°C - ensures stable trip point across ambient temperature swings in non-temperature-compensated designs. |
Pinout & Package
MAX8211CPA-2 is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is THRESH, Pin 2 is HYST, Pin 4 is V+, Pin 5 is GND, and Pin 8 is OUT. Pins 3, 6, and 7 are no-connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| THRESH (Pin 1) | Comparator input | High-impedance MOSFET gate node; voltage divider output applied here determines trip point relative to 1.15V reference. |
| HYST (Pin 2) | Hysteresis output | Open-drain p-channel output; supplies positive feedback current to THRESH node to widen hysteresis window. |
| V+ (Pin 4) | Power supply | Primary supply rail (2.0–16.5V); powers internal reference, comparator, and output stages. |
| GND (Pin 5) | Ground reference | Analog and digital ground return; must be low-impedance to maintain threshold accuracy and noise immunity. |
| OUT (Pin 8) | Output driver | Current-limited open-drain n-channel output; sinks up to 7mA when THRESH < 1.15V, signaling undervoltage condition. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable threshold detection | Uses external resistor divider on THRESH pin to set custom undervoltage trip points from ~2V to >16V with 1.15V internal reference. |
| Integrated hysteresis control | HYST output enables user-defined hysteresis width via external R3 feedback, eliminating false triggering in noisy supply environments. |
| Current-limited output stage | 7mA internal current limit protects output transistor during short-circuit or heavy capacitive load conditions without external components. |
| Ultra-low quiescent current | 5µA supply current at +25°C enables multi-year battery life in backup monitoring applications such as RTC or SRAM supervisors. |
| ICL8211 drop-in replacement | Pin-compatible and functionally equivalent to bipolar ICL8211 in ≤16.5V systems, offering lower power, tighter reference tolerance, and higher hysteresis drive. |
Applications
| Battery-Backup Switching | Logic-Supply Undervoltage Detection |
|---|---|
|
Use Scenario: Monitoring main VCC to trigger switchover to backup battery before system reset or data loss occurs. IC Role / Device Role / Timing Role: Voltage monitor asserting NMI or RESET signal when VCC drops below programmable threshold (e.g., 4.5V for 5V logic). Use Value: Prevents corruption of volatile memory or real-time clock registers by initiating controlled shutdown or backup activation within 1.5ms of undervoltage event. |
Use Scenario: Detecting brownout in 5V microcontroller power rails where VMIN = 4.5V per logic family specification. IC Role / Device Role / Timing Role: Threshold comparator generating clean, hysteresis-stabilized fault flag to MCU's interrupt or supervisor input. Use Value: Eliminates false resets caused by transient supply dips using 75mV hysteresis, while consuming only 5µA in active monitoring mode. |
| Microprocessor Power-Fail Warning | Industrial Power-Supply Fault Monitoring |
|
Use Scenario: Providing early warning of imminent power failure to allow microprocessor to save state or initiate graceful shutdown. IC Role / Device Role / Timing Role: Dedicated voltage detector feeding NMI line to μP, activated when monitored rail falls below configured trip point. Use Value: Delivers 40µs turn-on delay and 1.5ms turn-off delay - fast enough for critical save operations yet immune to sub-millisecond noise spikes. |
Use Scenario: Supervising 12V or 15V industrial DC power rails for undervoltage faults in PLC or motor control modules. IC Role / Device Role / Timing Role: Programmable threshold detector interfacing with optocoupler or isolation amplifier to report fault status to host controller. Use Value: Supports full 2.0–16.5V supply range and tolerates worst-case ±3.5% threshold error, ensuring reliable fault reporting across wide temperature and aging conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8211CSA | Same electrical specs, but in 8-pin SO surface-mount package instead of 8-pin plastic DIP. | Requires PCB redesign for SMT assembly; not suitable for through-hole prototyping or legacy DIP footprints. | Select MAX8211CSA only when automated SMT production and board space constraints justify footprint change. |
| TLV809E33DBZR | Fixed 3.3V threshold, no hysteresis output, 1.8–6V supply range, 0.5µA quiescent current. | Lacks programmability and HYST feedback capability; limited to single-rail 3.3V systems without external resistor network. | Choose TLV809E33DBZR only for cost-sensitive, fixed-threshold 3.3V applications where hysteresis and wide supply range are unnecessary. |
Compared with MAX8211CSA and TLV809E33DBZR, the MAX8211CPA-2 uniquely combines DIP packaging, resistor-programmable threshold, integrated hysteresis output, and 2–16.5V operation - making it optimal for legacy-compatible, multi-rail, and noise-prone industrial monitoring tasks.
Availability
MAX8211CPA-2 is available at Aetrix Electronics and suitable for battery-backup switching, logic-supply undervoltage detection, and microprocessor power-fail warning applications requiring stable component supply across commercial temperature grades.
Supply support for MAX8211CPA-2 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-2 belongs to Analog Devices' precision voltage supervisor product line, engineered specifically for reliable, low-power, programmable power-rail monitoring in microprocessor-based systems.
FAQ
What is the primary function of the MAX8211CPA-2?
The MAX8211CPA-2 is a micropower voltage detector IC that monitors a DC supply rail and asserts an open-drain output when the monitored voltage falls below a user-programmed threshold. Its core function is undervoltage detection with built-in hysteresis control, implemented via an internal 1.15V reference and external resistor network. The MAX8211CPA-2 delivers this functionality in an 8-pin plastic DIP package rated for 0°C to +70°C operation.
How does the MAX8211CPA-2 differ from the MAX8212 variant?
The MAX8211CPA-2 activates its output when the THRESH pin voltage drops *below* the 1.15V internal reference, and limits output sink current to 7mA. In contrast, the MAX8212 activates when THRESH exceeds 1.15V and has no internal current limit. This makes the MAX8211CPA-2 ideal for undervoltage detection with safe, bounded output drive, while the MAX8212 suits overvoltage detection where higher sink current is needed. Both share identical pinout, package, and reference accuracy.
Can the MAX8211CPA-2 be used as a direct replacement for the ICL8211?
Yes - the MAX8211CPA-2 is explicitly specified as a plug-in replacement for the bipolar ICL8211 in applications with supply voltages below 16.5V. It matches the ICL8211's pinout and basic function but improves upon it with 5µA vs. ~100µA quiescent current, ±40mV threshold accuracy vs. ±100mV, and 10mA hysteresis drive vs. 21µA. No PCB changes are required, though users should verify stability in closed-loop zener-regulator circuits due to higher gain.
What is the role of the HYST pin on the MAX8211CPA-2?
The HYST pin on the MAX8211CPA-2 is an open-drain p-channel output that supplies positive feedback current to the THRESH node via an external resistor (R3). This creates a programmable hysteresis window - raising the effective trip point on rising voltage and lowering it on falling voltage - which prevents output oscillation during slow or noisy supply transitions. The HYST output can source up to 10mA, enabling robust hysteresis implementation without additional active components.
What are the absolute maximum ratings for the MAX8211CPA-2 supply voltage?
The MAX8211CPA-2 has an absolute maximum supply voltage rating of –0.5V to +18V, but its guaranteed operating supply voltage range is 2.0V to 16.5V across the 0°C to +70°C temperature range. Operation above 16.5V risks exceeding internal power dissipation limits, especially at elevated temperatures. The device must never be exposed to supply transients exceeding +18V, even briefly, as this may cause permanent damage per the Absolute Maximum Ratings table.
MAX8211CPA-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX8211CPA-2 FAQ
1.How can I place an order for MAX8211CPA-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211CPA-2 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-2 reliable?
The price and inventory of MAX8211CPA-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211CPA-2 is usually 5 days.
3.What payment methods are accepted for MAX8211CPA-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211CPA-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211CPA-2?
MAX8211CPA-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211CPA-2 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-2?
For technical support, including MAX8211CPA-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211CPA-2 requirements.
6.How does Aetrix verify that MAX8211CPA-2 is sourced from the original manufacturer or authorized distributors?
All MAX8211CPA-2 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-2 meets industry standards.
7.What is the process for return or replacement of MAX8211CPA-2?
All MAX8211CPA-2 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211CPA-2, 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-2 part is unused and in its original packaging.
Return procedure for MAX8211CPA-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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