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Analog Devices Inc./Maxim Integrated MAX8211EJA
- Part No.:
- MAX8211EJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX8211EJA.pdf
- Description:
- IC SUPERVISOR PROG VOLT DETECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
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Product details
Overview
MAX8211EJA from Maxim Integrated is a CMOS micropower voltage detector IC that monitors supply rails for undervoltage conditions and asserts an open-drain output when threshold is breached. It features a 1.15V internal bandgap reference, ±40mV (±3.5%) threshold accuracy, 5µA quiescent current, and 7mA current-limited output sink. Designed for microprocessor power-fail warning in industrial control systems with extended temperature operation.
For engineers reviewing the MAX8211EJA datasheet, MAX8211EJA pinout, MAX8211EJA application, or MAX8211EJA equivalent, key selection factors include its programmable trip voltage via external resistors, hysteresis-enabled noise immunity, CERDIP-8 packaging for high-reliability environments, and compatibility with legacy ICL8211-based designs under ≤16.5V supply.
Technical Context
The MAX8211EJA implements a precision comparator architecture with a low-leakage MOSFET input stage referenced to a 1.15V bandgap source, enabling accurate voltage detection across 2.0V–16.5V supply range. Its THRESH pin accepts externally divided input voltage, while HYST provides open-drain positive feedback for user-defined hysteresis width.
Unlike the MAX8212 variant, the MAX8211EJA activates its n-channel output transistor only when THRESH falls below 1.15V, delivering a current-limited 7mA sink-sufficient to drive LEDs directly without series resistors. Output saturation voltage remains ≤0.4V at 2mA load, ensuring clean logic-level signaling into standard TTL/CMOS inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports wide-input industrial and automotive auxiliary rails without external regulation |
| Threshold Accuracy | ±40mV (±3.5%) - enables reliable undervoltage detection at 4.5V nominal logic supply with margin |
| Quiescent Current | 5µA - allows battery-backed systems to maintain monitoring for years without significant drain |
| Output Sink Current | 7mA typical - drives LEDs or small logic loads directly, eliminating external driver transistors |
| Operating Temperature | -40°C to +85°C - qualified for extended-temperature industrial and transportation electronics |
| Hysteresis Control | Open-drain HYST pin - permits precise dead-band tuning via external resistor feedback network |
| Input Leakage | 20nA max - permits use of high-value divider resistors (up to 10MΩ), minimizing system power loss |
Pinout & Package
MAX8211EJA is housed in an 8-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing and lead finish suitable for high-reliability, long-life applications. Pin 1 is THRESH; Pin 2 is HYST; Pin 4 is V+; Pin 5 is GND; Pin 8 is OUT. Pins 3, 6, and 7 are no-connect (N.C.) and must remain unconnected per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - THRESH | Comparator input | Accepts externally divided voltage; triggers output when <1.15V relative to GND |
| 2 - HYST | Hysteresis feedback output | Open-drain p-channel output used to inject positive feedback into resistor divider for noise immunity |
| 4 - V+ | Positive supply rail | Power input for internal circuitry; absolute max rating is +18V |
| 5 - GND | Ground reference | Analog and digital ground return; must be low-impedance for stable threshold reference |
| 8 - OUT | Open-drain output | n-channel sink output active low; current-limited to 7mA; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Programmable trip voltage | Set via two external resistors; enables detection at any voltage ≥2.0V using 1.15V internal reference |
| On-board hysteresis control | HYST pin delivers up to 10mA of controlled positive feedback current to eliminate false triggering from noise |
| Current-limited output | 7mA sink capability allows direct LED driving without series resistor-reducing BOM count and board space |
| Low-power CMOS design | 5µA supply current enables always-on monitoring in energy-constrained systems such as battery backup circuits |
| ICL8211 drop-in replacement | Pins 1–8 match ICL8211 footprint and function; operates at lower supply current and tighter reference tolerance |
Applications
| Microprocessor Power-Fail Warning | Battery-Backup Switching |
|---|---|
Use Scenario: Monitoring 5V system rail in industrial PLC controller to initiate graceful µP shutdown before brownout. IC Role / Device Role / Timing Role: Voltage detector asserting NMI interrupt when supply drops below 4.5V threshold. Use Value: Prevents data corruption by enabling firmware-controlled save-and-halt sequence prior to power collapse. | Use Scenario: Detecting main 12V supply failure in telecom line card to switch to backup Li-ion battery. IC Role / Device Role / Timing Role: Undervoltage detector enabling automatic switchover via external MOSFET gate driver. Use Value: Ensures uninterrupted operation during AC mains interruption with sub-millisecond response time. |
| Logic-Supply Undervoltage Detection | Power-Supply Fault Monitoring |
Use Scenario: Verifying 3.3V FPGA core supply remains above 3.0V during cold temperature startup. IC Role / Device Role / Timing Role: Precision threshold monitor with hysteresis preventing chatter near trip point. Use Value: Guarantees functional integrity of digital logic by disabling configuration until stable voltage is confirmed. | Use Scenario: Monitoring isolated DC-DC converter output in medical imaging power module. IC Role / Device Role / Timing Role: Fault indicator asserting fault latch signal upon sustained overvoltage or undervoltage condition. Use Value: Enables fail-safe shutdown of high-voltage subsystems before component stress exceeds safe limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8211ESA | Same electrical specs; SO-8 package instead of CERDIP-8; -40°C to +85°C temp range | Lower cost, surface-mount assembly; less robust against moisture and thermal cycling than hermetic CERDIP | Select MAX8211ESA for cost-sensitive PCB-assembled products where environmental stress is moderate. |
| TLV809E | Fixed 3.08V threshold; SOT-23-3 package; 1.8V–6V supply; no hysteresis pin or programmability | Not programmable; lacks HYST control and wide supply range; suited only for fixed-rail monitoring | Choose TLV809E only if detecting exactly 3.08V on low-voltage rails where board space is critical and hysteresis is handled externally. |
Compared with MAX8211ESA and TLV809E, the MAX8211EJA uniquely combines hermetic CERDIP packaging, full programmability down to 2.0V, and dedicated hysteresis control-making it optimal for mission-critical industrial systems requiring long-term reliability and flexible trip-point configuration.
Availability
MAX8211EJA is available at Aetrix Electronics and suitable for industrial control systems, medical power modules, and telecom backup switching requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX8211EJA 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 U.S.-based semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX8211 product line delivers precision, low-power voltage monitoring solutions designed specifically for microprocessor supervisory functions in harsh environments where reliability and programmability are essential.
FAQ
What is the exact threshold reference voltage inside the MAX8211EJA?
The MAX8211EJA uses a trimmed 1.15V internal bandgap reference voltage for threshold comparison. This value is specified across temperature and supply voltage variations, with ±40mV total accuracy (±3.5%) over the full -40°C to +85°C operating range. The MAX8211EJA datasheet confirms this reference is used directly at the THRESH pin to determine output activation.
Can the MAX8211EJA be used for overvoltage detection?
No-the MAX8211EJA is configured exclusively for undervoltage detection: its output activates when THRESH falls *below* 1.15V. For overvoltage detection, the MAX8212EJA variant must be used, which triggers when THRESH exceeds 1.15V. Using MAX8211EJA in overvoltage mode would result in no valid output assertion.
Does the MAX8211EJA require an external pull-up resistor on the OUT pin?
Yes-the MAX8211EJA features an open-drain n-channel output (OUT pin), which can only sink current. An external pull-up resistor to V+ or another logic rail is mandatory to generate a valid high-level signal. Typical values range from 10kΩ to 100kΩ depending on rise-time and bus loading requirements.
How does the HYST pin function in the MAX8211EJA?
The HYST pin on the MAX8211EJA is an open-drain p-channel output that sources current when THRESH > 1.15V. It is connected through resistor R3 to the THRESH node to provide positive feedback, widening the effective trip window and preventing noise-induced oscillation. Its maximum output current is 10mA, and it operates with respect to V+, not GND.
Is the MAX8211EJA pin-compatible with the ICL8211?
Yes-the MAX8211EJA is a plug-in replacement for the bipolar ICL8211 in most applications operating below 16.5V supply. Pin assignments (THRESH, HYST, V+, GND, OUT) match identically in the 8-pin DIP/CERDIP footprint. However, due to higher gain and CMOS input impedance, stability in closed-loop zener applications may require compensation review.
MAX8211EJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX8211EJA FAQ
1.How can I place an order for MAX8211EJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211EJA 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 MAX8211EJA reliable?
The price and inventory of MAX8211EJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211EJA is usually 5 days.
3.What payment methods are accepted for MAX8211EJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211EJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211EJA?
MAX8211EJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211EJA 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 MAX8211EJA?
For technical support, including MAX8211EJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211EJA requirements.
6.How does Aetrix verify that MAX8211EJA is sourced from the original manufacturer or authorized distributors?
All MAX8211EJA 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 MAX8211EJA meets industry standards.
7.What is the process for return or replacement of MAX8211EJA?
All MAX8211EJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211EJA, 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 MAX8211EJA part is unused and in its original packaging.
Return procedure for MAX8211EJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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