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Analog Devices Inc./Maxim Integrated MAX923ESA
- Part No.:
- MAX923ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923ESA.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,198
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Product details
Overview
The MAX923ESA from Maxim Integrated is a dual, micropower, low-voltage comparator with internal 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply), draws ≤6µA quiescent current over –40°C to +85°C, and features TTL/CMOS-compatible outputs that source up to 40mA. It is used in battery-powered threshold detection and window comparator circuits requiring rail-to-rail input range and stable reference.
For engineers reviewing the MAX923ESA datasheet, MAX923ESA pinout, MAX923ESA application, or MAX923ESA equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, guaranteed operation across industrial temperature range, ultra-low supply current at extended voltage range, and SO-8 package compatibility with legacy board layouts.
Technical Context
The MAX923ESA integrates two independent comparators sharing a precision 1.182V reference and a dedicated HYST pin for adjustable hysteresis without external feedback. Its input common-mode range extends from V− to (V+ − 1.3V), enabling operation near supply rails. The output stage continuously sources up to 40mA while eliminating crowbar current during transitions, minimizing parasitic supply feedback.
Unlike MAX922 (no internal reference) or MAX924 (quad, no hysteresis pin), the MAX923ESA uniquely combines dual comparators, internal reference, and HYST-based hysteresis in an 8-pin SO package-enabling compact, low-power window detectors and auto-off power switches without external reference or complex resistor networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - supports both battery-powered and bipolar signal monitoring systems |
| Quiescent Current | ≤6µA over –40°C to +85°C - enables multi-year operation on coin-cell batteries |
| Reference Voltage | 1.182V ±1% (E-temp range) referenced to V− - provides stable trip point without external reference IC |
| Propagation Delay | 12µs at 10mV overdrive - sufficient for slow-varying thresholds in power supervision |
| Input Offset Voltage | ±10mV - defines minimum detectable voltage difference between IN+ and IN− |
| Output Drive | Sources ≥40mA continuously - directly drives LEDs, small relays, or logic inputs without buffer stages |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows sensing signals down to ground and up to within 1.3V of V+ in single-supply mode |
Pinout & Package
MAX923ESA is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints and suitable for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V− for single-supply operation; output swings from V+ to GND |
| 2 | V− | Negative supply rail; tied to GND in single-supply mode; sets reference and output lower bound |
| 3 | INB− | Inverting input of comparator B - accepts analog signals up to V+ − 1.3V |
| 4 | INB+ | Noninverting input of comparator B - used with INB− to set B-channel trip point |
| 5 | INA− | Inverting input of comparator A - independently configurable for A-channel threshold |
| 6 | HYST | Hysteresis control input; voltage between REF and HYST sets hysteresis band (max 100mV) |
| 7 | REF | 1.182V reference output referenced to V−; supplies bias for hysteresis and external circuitry |
| 8 | V+ | Positive supply rail; supports up to +11V; powers both comparators and reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Reduces component count and board space in window detectors by eliminating second reference IC |
| Programmable hysteresis via HYST pin | Enables precise, low-current hysteresis tuning using only two resistors - no feedback loop stability concerns |
| 40mA continuous output source current | Drives LEDs, MOSFET gates, or logic inputs directly - avoids need for external driver transistors |
| No crowbar switching current | Eliminates supply-line glitches during output transitions - improves system stability without heavy bypassing |
| Rail-to-rail input range (V− to V+ − 1.3V) | Supports direct sensing of battery voltage, sensor outputs, or rail monitors without level-shifting circuitry |
Applications
| Undervoltage/Overvoltage Detection | Auto-Off Power Switch |
|---|---|
Use Scenario: Monitoring 4.5V–5.5V supply rails in portable instrumentation to assert "power good" or fault signals. IC Role / Device Role / Timing Role: Dual comparator compares VIN against upper/lower thresholds derived from REF and resistor dividers; OUTA and OUTB provide active-low UV/OV flags. Use Value: Eliminates need for discrete reference and hysteresis components - reduces BOM count by ≥4 parts per channel. | Use Scenario: Enabling timed shutdown of microcontroller peripherals after button press in handheld devices. IC Role / Device Role / Timing Role: Comparator A triggers latching circuit; comparator B monitors RC timer voltage to reset output after delay. Use Value: Achieves <3.5µA total quiescent current in off-state - extends shelf life of battery-powered products. |
| Bar-Graph LED Driver | Level Shifter (±5V to TTL) |
Use Scenario: Driving four LEDs to indicate battery charge level in medical wearables. IC Role / Device Role / Timing Role: Each comparator compares divided VIN against fixed REF-derived thresholds; outputs sink/source to drive LEDs directly. Use Value: 40mA output capability enables full-brightness LED drive without current-limiting resistors or external drivers. | Use Scenario: Converting ±5V analog sensor outputs to 0V/5V logic levels for MCU ADC input protection. IC Role / Device Role / Timing Role: Comparator A processes positive half-cycle; comparator B handles negative half-cycle; REF sets zero-crossing point. Use Value: Internal 1.182V reference replaces external precision divider - maintains accuracy across temperature without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX923CSA | Same functionality and pinout; commercial temp range (0°C to +70°C) vs. MAX923ESA's –40°C to +85°C | Not rated for industrial or automotive ambient conditions; unsuitable for outdoor or under-hood use | Select MAX923CSA only for cost-sensitive consumer applications operating within 0–70°C |
| LM393DR | No internal reference; no HYST pin; higher 1mA quiescent current; open-collector outputs require pull-up | Requires external reference and hysteresis network; cannot source current - needs additional driver for LED/load drive | Choose LM393DR only when reference/hysteresis are already provided elsewhere in system and ultra-low power is not required |
Compared with MAX923CSA, the MAX923ESA offers extended temperature reliability without design change; compared with LM393DR, it delivers integrated reference, hysteresis, and sourcing capability - reducing total solution size and power by >99% in battery-critical designs.
Availability
MAX923ESA is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across industrial temperature environments.
Supply support for MAX923ESA 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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX921–MAX924 family was engineered for ultra-low-power, single/dual-supply comparator applications where micropower operation, integrated reference, and robust output drive are essential - especially in portable and remote sensing systems.
FAQ
What is the maximum supply voltage for MAX923ESA?
The MAX923ESA supports a single-supply voltage range of +2.5V to +11V. When operated from dual supplies, it accepts ±1.25V to ±5.5V. Exceeding +11V or –5.5V violates absolute maximum ratings and may cause permanent damage. The device remains functional at +10V with full specification compliance across its –40°C to +85°C operating range.
Does MAX923ESA require external hysteresis components?
No - the MAX923ESA includes a dedicated HYST pin that enables programmable hysteresis using just two external resistors (R1 between REF and HYST, R2 between HYST and V−). This eliminates the need for external positive-feedback networks, simplifies layout, and avoids instability risks associated with high-impedance feedback paths. Hysteresis bandwidth is adjustable up to 100mV.
Can MAX923ESA drive LEDs directly?
Yes - the MAX923ESA outputs can continuously source up to 40mA per channel, making it suitable for direct LED driving without current-limiting resistors or external transistors. For example, a red LED with 1.8V forward voltage and 20mA requirement can be driven from OUTA with V+ = 5V and no series resistor, provided thermal limits are observed and load capacitance remains below 100pF.
What is the function of the REF pin on MAX923ESA?
The REF pin on MAX923ESA provides a stable 1.182V ±1% output referenced to V− (not GND), usable as a precision threshold source for both comparators and the HYST network. It can source up to 25µA and sink up to 15µA at +25°C. Bypassing REF is prohibited - capacitive loading degrades noise performance and may cause oscillation due to crosstalk into sensitive comparator inputs.
Is MAX923ESA pin-compatible with other MAX92x devices in SO-8 package?
MAX923ESA shares the same SO-8 footprint with MAX921ESA and MAX922ESA, but pin functions differ. Specifically, MAX923ESA uses Pin 3 as INB− and Pin 4 as INB+, whereas MAX921ESA uses Pin 3 as IN+ and Pin 4 as IN−. Substituting without schematic review will result in incorrect comparator polarity and nonfunctional hysteresis. Always verify pin mapping against the MAX923ESA-specific pinout diagram.
MAX923ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 7.5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX923ESA FAQ
1.How can I place an order for MAX923ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923ESA 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 MAX923ESA reliable?
The price and inventory of MAX923ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923ESA is usually 5 days.
3.What payment methods are accepted for MAX923ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923ESA?
MAX923ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923ESA 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 MAX923ESA?
For technical support, including MAX923ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923ESA requirements.
6.How does Aetrix verify that MAX923ESA is sourced from the original manufacturer or authorized distributors?
All MAX923ESA 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 MAX923ESA meets industry standards.
7.What is the process for return or replacement of MAX923ESA?
All MAX923ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX923ESA, 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 MAX923ESA part is unused and in its original packaging.
Return procedure for MAX923ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923ESA Tags
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