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Analog Devices Inc./Maxim Integrated MAX8211ESA+T
- Part No.:
- MAX8211ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX8211ESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,697
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Product details
Overview
MAX8211ESA+T 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 bandgap reference, open-drain n-channel output with 7mA current limiting, ±40mV threshold accuracy (±3.5%), and operates across 2.0V–16.5V supply range. Used in battery-backup switching and power-supply fault monitoring circuits where low quiescent current (5µA) and noise-immune hysteresis are critical.
For engineers reviewing the MAX8211ESA+T datasheet, MAX8211ESA+T pinout, MAX8211ESA+T application, or MAX8211ESA+T equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, and confirmed alternative options for voltage-monitoring system design.
Technical Context
The MAX8211ESA+T implements a precision comparator architecture with an internal 1.15V bandgap reference and low-leakage MOSFET THRESH input (≤10nA). Its output activates when THRESH voltage falls below the reference-enabling undervoltage detection-and includes a dedicated open-drain HYST output for user-configurable positive feedback.
Unlike the MAX8212, the MAX8211ESA+T provides current-limited sinking (7mA typical) on the OUT pin, allowing direct LED drive without external series resistance. Hysteresis magnitude is set externally via resistor R3 between HYST and the THRESH divider node, with <±0.1mV threshold disparity between OUT and HYST switching points to eliminate chatter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports operation from logic-level supplies up to industrial 15V rails without external regulation. |
| Quiescent Current | 5µA typical - enables multi-year battery life in backup-monitoring applications such as RTC or SRAM supervisors. |
| Threshold Accuracy | ±40mV (±3.5%) at +25°C - ensures reliable trip-point repeatability across production batches without calibration. |
| Output Sink Current | 7mA typical, current-limited - permits direct interface to TTL/CMOS inputs or low-current LEDs without added driver circuitry. |
| Threshold Tempco | -200ppm/°C - maintains stable detection point over -40°C to +85°C industrial temperature range. |
| Hysteresis Output Capability | Up to 10mA HYST sink - allows robust positive feedback injection into high-impedance resistor dividers for clean switching. |
| THRESH Input Leakage | ≤10nA - permits use of MΩ-range divider resistors, reducing system standby current by >90% vs. bipolar predecessors. |
Pinout & Package
MAX8211ESA+T is housed in an 8-pin SO (Small Outline) package (S8-2), RoHS-compliant, with standard 1.27mm pitch and gull-wing leads. Thermal performance: 471mW max power dissipation at +70°C, derated 5.88mW/°C above.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 THRESH | Comparator input | High-impedance MOSFET gate node; voltage applied here is compared against 1.15V reference to trigger output. |
| 2 HYST | Hysteresis output | Open-drain p-channel output; sinks up to 10mA to inject positive feedback into THRESH divider for noise immunity. |
| 3 N.C. | No connect | Internally unconnected; must remain floating or tied to GND per layout guidelines-no routing or loading permitted. |
| 4 V+ | Positive supply | Primary power rail input; accepts 2.0V–16.5V; powers internal reference, comparator, and output stages. |
| 5 GND | Ground reference | Analog and digital ground return; must be low-impedance path to minimize threshold error from ground bounce. |
| 6 N.C. | No connect | Internally unconnected; electrically isolated-no PCB trace or thermal pad connection required. |
| 7 N.C. | No connect | Internally unconnected; no electrical function; leave unpopulated on PCB. |
| 8 OUT | Main output | Open-drain n-channel output; sinks up to 7mA when THRESH < 1.15V; requires external pull-up for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable trip voltage | Set via two external resistors (R1/R2) referenced to 1.15V internal bandgap-enables custom detection thresholds from 2V to >15V. |
| On-board hysteresis output | Dedicated HYST pin delivers up to 10mA sink current for precise, user-defined hysteresis without external op-amps or comparators. |
| Current-limited output | 7mA max sink on OUT pin eliminates need for series current-limiting resistors when driving LEDs or logic inputs directly. |
| Low THRESH leakage | ≤10nA input bias enables use of >1MΩ divider networks-reducing total system quiescent current by orders of magnitude. |
| Plug-in replacement for ICL8211 | Pin-compatible with legacy bipolar ICL8211 in 8-SO footprint; delivers lower supply current, tighter reference tolerance, and higher HYST drive. |
Applications
| Battery-Backup Switching | Power-Supply Fault Monitoring |
|---|---|
|
Use Scenario: Detecting main supply collapse to initiate switchover to backup battery in real-time clock or SRAM hold circuits. IC Role / Device Role / Timing Role: Voltage monitor asserting reset or enable signal when VMAIN drops below 4.5V (programmed via R1/R2). Use Value: 5µA quiescent current extends backup battery life beyond 10 years; ±40mV threshold accuracy prevents false switchover during line transients. |
Use Scenario: Monitoring 12V industrial power rail for brownout or overvoltage events in PLC or motor control systems. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) and overvoltage protection (OVP) supervisor triggering shutdown sequence via microcontroller NMI input. Use Value: 2.0V–16.5V operating range covers full 12V nominal rail tolerance; HYST output enables clean latching behavior without external Schmitt triggers. |
| μP Voltage Monitoring | Low-Battery Detection |
|
Use Scenario: Providing early power-fail warning to microcontrollers before VCC falls below operational minimum. IC Role / Device Role / Timing Role: Threshold comparator feeding NMI or interrupt pin; configured for 4.65V trip to allow safe register save before reset. Use Value: 40µs turn-on delay ensures timely assertion; current-limited OUT drives microcontroller input directly without level-shifting. |
Use Scenario: Detecting end-of-life voltage in 3.7V Li-ion packs used in portable medical or IoT devices. IC Role / Device Role / Timing Role: Programmable undervoltage detector set to 3.0V cutoff, interfaced to MCU ADC or GPIO for state reporting. Use Value: THRESH leakage ≤10nA avoids loading battery under measurement; -40°C to +85°C rating supports outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | Fixed 2.93V threshold; no programmability; 0.5µA quiescent current; SOT-23-3 package. | Suitable only for single-threshold designs; lacks HYST output and adjustable trip point. | Select when board space is constrained and fixed threshold suffices-no resistor network needed. |
| MAX6326UR29+T | Fixed 2.93V reset IC; push-pull output; 1.6µA quiescent current; 3-pin SOT23 package. | No hysteresis configuration; no THRESH/HYST pins; intended for reset generation, not programmable monitoring. | Choose for simple power-on reset where programmability and hysteresis tuning are unnecessary. |
Compared with TLV803EB29DBZR and MAX6326UR29+T, the MAX8211ESA+T uniquely supports field-adjustable trip voltages, user-defined hysteresis, and dual-output (OUT + HYST) supervision-making it essential for adaptive power-monitoring architectures requiring flexibility and noise resilience.
Availability
MAX8211ESA+T is available at Aetrix Electronics and suitable for battery-backup switching, power-supply fault monitoring, and μP voltage monitoring applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX8211ESA+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX8211ESA+T belongs to Analog Devices' precision voltage-monitoring product line, engineered specifically for programmable, low-power, noise-immune power-fail detection in mission-critical embedded systems.
FAQ
What is the primary function of the MAX8211ESA+T?
The MAX8211ESA+T is a programmable micropower voltage detector IC that monitors supply voltage and asserts an open-drain output when the threshold voltage falls below 1.15V. Its core function is microprocessor power-fail warning, enabling safe shutdown or backup activation. The MAX8211ESA+T achieves this using an internal bandgap reference, low-leakage comparator input, and current-limited output stage optimized for reliability across -40°C to +85°C.
How does the MAX8211ESA+T differ from the MAX8212ESA+T?
The MAX8211ESA+T activates its OUT pin when the THRESH voltage drops *below* the 1.15V internal reference and limits output sink current to 7mA. In contrast, the MAX8212ESA+T activates when THRESH exceeds 1.15V and has no built-in current limit. This makes the MAX8211ESA+T ideal for undervoltage detection with safe drive capability, while the MAX8212ESA+T suits overvoltage scenarios requiring higher output current-though external current limiting is mandatory for the latter.
Can the MAX8211ESA+T be used without external resistors?
No-the MAX8211ESA+T requires two external resistors (R1 and R2) to form a voltage divider that scales the monitored supply to the 1.15V internal reference at the THRESH pin. Without them, the device cannot detect any meaningful voltage threshold. A third resistor (R3) is optional but recommended to connect HYST to the THRESH node for noise-immune hysteresis. The MAX8211ESA+T has no fixed-trip variants; all threshold programming is external.
What is the role of the HYST pin on the MAX8211ESA+T?
The HYST pin on the MAX8211ESA+T is an open-drain p-channel output that sinks up to 10mA. It is used to inject positive feedback into the THRESH voltage divider, creating user-defined hysteresis to prevent output oscillation near the trip point. Unlike the main OUT pin, HYST remains active when THRESH exceeds 1.15V-enabling precise dead-band control. This functionality is absent in most fixed-reset ICs and is a key differentiator of the MAX8211ESA+T.
Is the MAX8211ESA+T pin-compatible with the ICL8211?
Yes-the MAX8211ESA+T is explicitly specified as a plug-in replacement for the bipolar ICL8211 in 8-SO packages, sharing identical pinout (THRESH, HYST, V+, GND, OUT, and three N.C. pins). However, due to its CMOS architecture, the MAX8211ESA+T draws significantly less supply current (5µA vs. ~100µA), offers tighter threshold accuracy (±40mV vs. ±100mV), and delivers higher HYST output current (10mA vs. 21µA), making it a functional and performance upgrade.
MAX8211ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
MAX8211ESA+T FAQ
1.How can I place an order for MAX8211ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211ESA+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 MAX8211ESA+T reliable?
The price and inventory of MAX8211ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211ESA+T is usually 5 days.
3.What payment methods are accepted for MAX8211ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211ESA+T?
MAX8211ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211ESA+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 MAX8211ESA+T?
For technical support, including MAX8211ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211ESA+T requirements.
6.How does Aetrix verify that MAX8211ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX8211ESA+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 MAX8211ESA+T meets industry standards.
7.What is the process for return or replacement of MAX8211ESA+T?
All MAX8211ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211ESA+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 MAX8211ESA+T part is unused and in its original packaging.
Return procedure for MAX8211ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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