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Analog Devices Inc./Maxim Integrated MAX8211CSA+T
- Part No.:
- MAX8211CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX8211CSA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
MAX8211CSA+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 internal bandgap reference, ±40mV threshold accuracy (±3.5%), 5µA quiescent supply current, 7mA current-limited open-drain output sink, and operates across a 2.0V to 16.5V supply range. It is used in battery-backed systems to trigger NMI or reset on supply droop.
For engineers reviewing the MAX8211CSA+T datasheet, MAX8211CSA+T pinout, MAX8211CSA+T application, or MAX8211CSA+T equivalent, key selection criteria include threshold accuracy over temperature, hysteresis implementation via HYST pin, current-limited output capability for direct LED drive, and SO-8 package compatibility with legacy ICL8211 designs.
Technical Context
The MAX8211CSA+T integrates a precision 1.15V bandgap reference, comparator, and open-drain n-channel output stage with built-in current limiting (7mA typical). Its THRESH input accepts externally divided supply voltage, while the HYST pin provides an open-drain p-channel output for programmable positive feedback to set hysteresis width.
Unlike the MAX8212, the MAX8211 activates its output when THRESH falls *below* the 1.15V reference - making it ideal for undervoltage detection. Threshold trip voltage exhibits ±40mV accuracy at +25°C and ±200ppm/°C temperature coefficient, with supply rejection of ≤1.0mV over V+ = 4.5V–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0V to 16.5V - supports logic supplies (3.3V/5V) and industrial rails up to 15V without external regulation. |
| Quiescent Current | 5µA typical - enables multi-year operation in battery-powered backup monitors and low-power IoT edge nodes. |
| Threshold Accuracy | ±40mV (±3.5%) at +25°C - ensures reliable trip point setting without calibration, even with 1% resistor networks. |
| Output Sink Current | 7mA typical, 30mA absolute max - allows direct driving of LEDs or small MOSFET gates without external current-limiting resistors. |
| Hysteresis Control | Open-drain HYST output with ±0.1mV THRESH/HYST disparity - eliminates chatter by enabling precise dead-band tuning via external R3 feedback. |
| Temperature Range | 0°C to +70°C - qualified for commercial-grade embedded control, instrumentation, and consumer electronics applications. |
| Package | 8-pin SO (SOIC-8) - industry-standard footprint compatible with automated SMT assembly and IPC-7351B land patterns. |
Pinout & Package
MAX8211CSA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Input | Primary power rail connection (2.0V–16.5V); powers internal reference and comparator. |
| HYST | Hysteresis Output | Open-drain p-channel output used to inject controlled positive feedback into THRESH divider for noise-immune switching. |
| THRESH | Threshold Input | High-impedance MOSFET input (≤10nA leakage) accepting divided supply voltage; triggers output when <1.15V. |
| GND | Ground Reference | Analog and digital ground return; must be low-impedance path to minimize reference error. |
| OUT | Output Driver | Open-drain n-channel output with 7mA current limit; sinks load when THRESH <1.15V (undervoltage active-low). |
| N.C. | No Connect | Pins 3, 6, and 7 are internally unconnected - must remain floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Trip Voltage | Set via two external resistors (R1/R2) referencing internal 1.15V bandgap - eliminates need for external references or trimming. |
| Current-Limited Output | 7mA typical sink current with hard 30mA limit - enables safe direct interface to LEDs, optocouplers, or gate drivers without series resistors. |
| On-Chip Hysteresis Path | Dedicated HYST pin with ±0.1mV matching to THRESH - supports stable, chatter-free switching even in noisy environments. |
| Low-Temperature Drift | ±200ppm/°C threshold coefficient - maintains trip point stability across 0°C–70°C without compensation circuitry. |
| ICL8211 Drop-In Replacement | Pin- and function-compatible with bipolar ICL8211 in <16.5V systems - delivers lower IQ, tighter reference, and higher HYST drive (up to 10mA). |
Applications
| Battery Backup Supervisor | Logic Supply Undervoltage Detection |
|---|---|
Use Scenario: Monitoring main VCC in microcontroller-based data loggers with SRAM backup powered by coin cell. IC Role / Device Role / Timing Role: Voltage monitor asserting NMI interrupt when VCC drops below 4.5V during brownout. Use Value: Prevents data corruption by triggering controlled save-and-shutdown before supply collapse, using only 5µA quiescent current. | Use Scenario: Detecting failure of 5.0V logic rail in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Undervoltage detector pulling reset line low when 5V rail sags below 4.5V nominal minimum. Use Value: Ensures deterministic system reset with 40µs turn-on delay and 1.5ms turn-off delay - avoids false resets from transient dips. |
| Power-Supply Fault Monitor | DC-DC Converter Output Tracking |
Use Scenario: Verifying output stability of isolated 12V DC-DC converters in telecom power shelves. IC Role / Device Role / Timing Role: Threshold input connected to converter output via resistor divider; OUT drives fault latch. Use Value: Detects sustained undervoltage (e.g., <11.4V) with ±40mV accuracy, rejecting noise via user-programmed hysteresis. | Use Scenario: Tracking regulated 3.3V output of buck converter against 1.15V reference in FPGA power sequencing. IC Role / Device Role / Timing Role: THRESH fed from scaled-down 3.3V rail; HYST pin used to add 75mV hysteresis for clean enable/disable transitions. Use Value: Enables precise tracking with <1mV supply-induced threshold shift - critical for tight-tolerance FPGA core voltage supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC26DBZR | Fixed 2.63V threshold, no programmability, 0.5µA IQ, SOT-23-3 package | Suitable only for fixed-threshold detection; lacks HYST pin and adjustable trip point | Select when board space is constrained and trip voltage is invariant across designs. |
| MAX6326UR26+T | Fixed 2.63V reset IC with 140ms reset timeout, 1.6µA IQ, SC70-3 package | Provides timed reset pulse instead of raw comparator output; no hysteresis programming | Choose when system requires guaranteed minimum reset assertion duration after fault clearance. |
Compared with TLV809EC26DBZR and MAX6326UR26+T, the MAX8211CSA+T offers full trip voltage programmability, user-defined hysteresis, and current-limited open-drain output - making it uniquely suited for custom undervoltage/overvoltage monitoring where flexibility and noise immunity are required.
Availability
MAX8211CSA+T is available at Aetrix Electronics and suitable for battery backup supervisors, logic supply undervoltage detection, and power-supply fault monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8211CSA+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.
The MAX8211CSA+T belongs to Analog Devices' precision voltage monitor product line, engineered for reliable power-fail warning and programmable threshold detection in resource-constrained embedded systems.
FAQ
What is the primary function of the MAX8211CSA+T?
The MAX8211CSA+T is a programmable undervoltage detector IC that asserts an open-drain output when the voltage at its THRESH pin falls below its internal 1.15V reference. It is used to generate power-fail warnings, reset signals, or NMI interrupts in microprocessor systems. Its current-limited 7mA output and HYST pin enable robust, noise-immune monitoring without external components.
How does the MAX8211CSA+T differ from the MAX8212?
The MAX8211CSA+T activates its output when THRESH voltage is *less than* 1.15V (undervoltage mode), with a current-limited 7mA sink. The MAX8212 activates when THRESH exceeds 1.15V (overvoltage mode) and has no output current limit. Both share the same 1.15V reference, HYST pin, and SO-8 package, but their logic polarity and output drive characteristics are fundamentally different.
Can the MAX8211CSA+T be used for overvoltage detection?
No - the MAX8211CSA+T is specifically designed for undervoltage detection (output active when THRESH < 1.15V). For overvoltage detection, the MAX8212 variant must be used. Attempting overvoltage detection with MAX8211CSA+T would require inverting the sense network and forfeits guaranteed specifications, violating the intended operating mode defined in the datasheet.
What is the purpose of the HYST pin on the MAX8211CSA+T?
The HYST pin on the MAX8211CSA+T is an open-drain p-channel output used to inject positive feedback into the THRESH resistor divider. By connecting an external resistor (R3) between HYST and the THRESH node, users define hysteresis width - preventing output oscillation during slow-moving or noisy supply transitions. Its ±0.1mV matching to THRESH ensures precise, chatter-free switching.
Is the MAX8211CSA+T pin-compatible with the ICL8211?
Yes - the MAX8211CSA+T is a plug-in replacement for the bipolar ICL8211 in applications with supply voltages below 16.5V. It matches the ICL8211's 8-pin SO footprint, pinout, and functional behavior, while improving quiescent current (5µA vs. ~100µA), reference accuracy (±40mV vs. ±100mV), and hysteresis drive capability (up to 10mA vs. 21µA).
MAX8211CSA+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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX8211CSA+T FAQ
1.How can I place an order for MAX8211CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8211CSA+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 MAX8211CSA+T reliable?
The price and inventory of MAX8211CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8211CSA+T is usually 5 days.
3.What payment methods are accepted for MAX8211CSA+T?
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4.How is shipping managed for MAX8211CSA+T?
MAX8211CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8211CSA+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 MAX8211CSA+T?
For technical support, including MAX8211CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8211CSA+T requirements.
6.How does Aetrix verify that MAX8211CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX8211CSA+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 MAX8211CSA+T meets industry standards.
7.What is the process for return or replacement of MAX8211CSA+T?
All MAX8211CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8211CSA+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 MAX8211CSA+T part is unused and in its original packaging.
Return procedure for MAX8211CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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