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Analog Devices Inc./Maxim Integrated MAX8211CSA+
- Part No.:
- MAX8211CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX8211CSA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:455
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Product details
Overview
The MAX8211CSA+ from Analog Devices is a CMOS micropower voltage detector IC designed to monitor supply rails and provide power-fail warning to microprocessors. It features a 1.15V internal bandgap reference, ±40mV threshold accuracy (±3.5%), 5µA quiescent current, 7mA current-limited open-drain output sink, and operates across a 2.0V–16.5V supply range. It is used in undervoltage detection circuits for logic supplies and battery-backed systems.
For engineers reviewing the MAX8211CSA+ datasheet, MAX8211CSA+ pinout, MAX8211CSA+ application, or MAX8211CSA+ equivalent, key selection criteria include programmable trip voltage via external resistors, hysteresis support via HYST pin, guaranteed operation over 0°C to +70°C, SO-8 package compatibility, and direct replacement capability for ICL8211 in sub-16.5V systems.
Technical Context
The MAX8211CSA+ 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 7mA current limiting. Its hysteresis output (HYST) provides up to 10mA drive capability and enables noise-immune switching when fed back into the resistor divider network.
Unlike the MAX8212, the MAX8211CSA+ activates its output when the THRESH pin voltage falls *below* the 1.15V reference - making it inherently suited for undervoltage detection. The device's ±200ppm/°C threshold temperature coefficient and <1.0mV supply-voltage-induced threshold variation ensure stable trip points across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports monitoring of 3.3V, 5V, and 12V rails without external regulation |
| Quiescent Current | 5µA typical - enables multi-year battery life in low-power backup monitoring applications |
| Threshold Accuracy | ±40mV (±3.5%) at +25°C - allows precise undervoltage detection without trimming resistors |
| Output Sink Current | 7mA typical, current-limited - directly drives LEDs or logic inputs without series resistors |
| Threshold Tempco | ±200ppm/°C - ensures <±15mV drift over 0°C to +70°C ambient range |
| Hysteresis Output Drive | Up to 10mA - enables robust positive feedback for clean, chatter-free switching |
| THRESH Input Leakage | ≤10nA - permits use of high-value (up to 10MΩ) resistor dividers with minimal error |
Pinout & Package
MAX8211CSA+ is housed in an 8-pin SO (Small Outline) package per package code S8-2, RoHS-compliant, with standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 THRESH | Comparator input | Voltage-sense node; compared against 1.15V internal reference; <10nA input leakage |
| 2 HYST | Hysteresis output | Open-drain p-channel output; sinks up to 10mA; used for positive feedback to THRESH |
| 3 N.C. | No connect | Internally unconnected; must be left floating or tied to GND (no electrical function) |
| 4 V+ | Positive supply | Primary power input; supports 2.0V–16.5V; powers internal reference and comparator |
| 5 GND | Ground reference | Analog and digital ground return; required for proper reference and output operation |
| 6 N.C. | No connect | Internally unconnected; must be left floating or tied to GND |
| 7 N.C. | No connect | Internally unconnected; must be left floating or tied to GND |
| 8 OUT | Main output | Open-drain n-channel output; sinks up to 7mA; active-low when THRESH < 1.15V |
Key Features
| Feature | Design Value |
|---|---|
| Programmable trip voltage | Set externally via two-resistor divider on THRESH; enables custom detection thresholds from ~1.2V to >15V |
| Integrated hysteresis control | HYST pin delivers up to 10mA for user-defined hysteresis width without external op-amps |
| Current-limited output | 7mA max sink on OUT prevents latch-up or damage when driving capacitive or shorted loads |
| Ultra-low supply current | 5µA quiescent draw minimizes impact on battery-backed or energy-harvested systems |
| ICL8211 drop-in replacement | Pins 1–8 match ICL8211 CPA/SOA; same SO-8 footprint and functional behavior below 16.5V supply |
Applications
| Logic-Supply Undervoltage Detection | Battery Backup Switchover |
|---|---|
Use Scenario: Monitoring a 5.0V logic supply to assert reset before voltage drops below 4.5V minimum spec. IC Role / Device Role / Timing Role: Voltage detector generating active-low reset signal when VIN falls below programmed threshold. Use Value: Prevents microprocessor corruption by ensuring clean reset assertion with 75mV hysteresis (via R3), eliminating false triggers from ripple. | Use Scenario: Detecting main supply failure in a system with primary DC input and lithium coin-cell backup. IC Role / Device Role / Timing Role: Threshold comparator triggering switchover control logic when main rail drops below safe operating level. Use Value: Enables seamless transition to backup power using only two external resistors and no additional ICs - reducing BOM count and board space. |
| Microprocessor Power-Fail Warning | Industrial Power-Supply Fault Monitoring |
Use Scenario: Providing early warning to an embedded μP before brownout causes execution errors or data loss. IC Role / Device Role / Timing Role: Generating non-maskable interrupt (NMI) signal to processor via open-drain OUT pin. Use Value: Delivers 40µs turn-on delay and 1.5ms turn-off delay - fast enough for graceful shutdown, slow enough to ignore transients. | Use Scenario: Monitoring 12V industrial power rails for undervoltage faults in PLC or motor-control modules. IC Role / Device Role / Timing Role: Supervisory circuit asserting fault flag when rail drops below 10.5V (programmed threshold). Use Value: Operates reliably up to 16.5V supply and maintains ±40mV accuracy across -40°C to +85°C - meeting extended industrial temp requirements. |
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 functionality and pinout; rated for -40°C to +85°C industrial temperature range | Required for designs operating outside 0°C–70°C commercial range | Select MAX8211ESA+ when extended temperature operation is needed; otherwise MAX8211CSA+ suffices for commercial-grade systems |
| TLV809E33DBZR | Dedicated 3.3V fixed-threshold detector; no programmability; 1.6µA quiescent current; SOT-23-3 package | Only suitable where fixed 3.3V detection is acceptable; lacks THRESH/HYST flexibility | Choose TLV809E33DBZR for ultra-low-power, cost-sensitive, single-rail 3.3V monitoring - not for programmable or multi-rail use |
Compared with MAX8211ESA+, the MAX8211CSA+ offers identical electrical performance but is limited to 0°C–70°C operation; compared with TLV809E33DBZR, it trades fixed-threshold simplicity for full programmability, higher supply voltage tolerance (16.5V vs. 6V), and integrated hysteresis control - making it suitable for flexible, multi-rail, and industrial-grade supervision.
Availability
MAX8211CSA+ is available at Aetrix Electronics and suitable for microprocessor reset generation, battery-backup switchover, and industrial power-supply fault monitoring requiring stable component supply and long-term manufacturability.
Supply support for MAX8211CSA+ 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 MAX8211CSA+ belongs to Analog Devices' precision voltage supervisor product line, engineered for reliable power-rail monitoring in resource-constrained embedded systems where low quiescent current, programmable thresholds, and noise-immune hysteresis are critical.
FAQ
What is the primary function of the MAX8211CSA+?
The MAX8211CSA+ is a programmable voltage detector IC that monitors a DC supply rail and asserts an active-low output when the sensed voltage falls below a user-defined threshold. Its core function is undervoltage detection - specifically, it turns ON its open-drain OUT pin when the THRESH pin voltage drops below the internal 1.15V reference. This makes the MAX8211CSA+ ideal for microprocessor reset generation, battery switchover control, and power-fail warning in commercial-grade systems operating from 0°C to +70°C.
How is the trip voltage set for the MAX8211CSA+?
The trip voltage for the MAX8211CSA+ is set externally using a two-resistor voltage divider connected between the supply rail (VIN), THRESH pin, and GND. The ratio of these resistors determines the input to THRESH; when that voltage falls below 1.15V, the OUT pin activates. For example, to detect 4.5V undervoltage, R1 and R2 are selected so that 4.5V × [R2/(R1+R2)] = 1.15V. The MAX8211CSA+ datasheet provides exact formulas and design examples - including hysteresis calculation using the HYST pin - enabling precise, repeatable threshold setting without trimming.
Does the MAX8211CSA+ support hysteresis, and how is it implemented?
Yes, the MAX8211CSA+ supports user-configurable hysteresis via its dedicated HYST pin - an open-drain p-channel output capable of sinking up to 10mA. To implement hysteresis, a resistor (R3) connects HYST to the THRESH node. When OUT goes low, HYST also activates, injecting additional current into the THRESH divider and raising the effective trip point for turn-off - creating a voltage "dead band" that prevents oscillation due to noise or slow-rising/falling supplies. This eliminates the need for external comparators or op-amps, simplifying the MAX8211CSA+ supervisory circuit.
What is the maximum supply voltage the MAX8211CSA+ can tolerate?
The MAX8211CSA+ has an absolute maximum supply voltage rating of +18V, but its guaranteed operating supply voltage range is 2.0V to 16.5V across the full 0°C to +70°C temperature range. Operation above 16.5V is not characterized and risks violating specifications or reliability limits. This 16.5V upper bound makes the MAX8211CSA+ compatible with common 12V and 15V industrial rails while remaining a safe plug-in replacement for the older ICL8211 in legacy designs - provided the original application stays within this voltage window.
Is the MAX8211CSA+ pin-compatible with the ICL8211?
Yes, the MAX8211CSA+ is explicitly designed as a plug-in replacement for the bipolar ICL8211 in applications where the supply voltage remains below 16.5V. Both devices share identical 8-pin SO packaging (S8-2 footprint), matching pin assignments (THRESH, HYST, V+, GND, OUT), and functional behavior: OUT activates when THRESH falls below ~1.15V. However, the MAX8211CSA+ improves upon the ICL8211 with lower quiescent current (5µA vs. ~100µA), tighter threshold accuracy (±40mV vs. ±100mV), and higher hysteresis drive (10mA vs. 21µA), making it a superior second-source option without PCB changes.
MAX8211CSA+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX8211CSA+ FAQ
1.How can I place an order for MAX8211CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211CSA+ 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 MAX8211CSA+ reliable?
The price and inventory of MAX8211CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211CSA+ is usually 5 days.
3.What payment methods are accepted for MAX8211CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8211CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8211CSA+?
MAX8211CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211CSA+ 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 MAX8211CSA+?
For technical support, including MAX8211CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211CSA+ requirements.
6.How does Aetrix verify that MAX8211CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX8211CSA+ 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 MAX8211CSA+ meets industry standards.
7.What is the process for return or replacement of MAX8211CSA+?
All MAX8211CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211CSA+, 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 MAX8211CSA+ part is unused and in its original packaging.
Return procedure for MAX8211CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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