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Analog Devices Inc./Maxim Integrated MAX923CSA
- Part No.:
- MAX923CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923CSA.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,890
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Product details
Overview
The MAX923CSA from Maxim Integrated is a dual, micropower, single/dual-supply comparator with internal 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It draws ≤6µA supply current over temperature (0°C to +70°C), supports 2.5V–11V single or ±1.25V–±5.5V dual supplies, and features TTL/CMOS-compatible outputs that source/sink current. It is used in battery-powered threshold detection and window comparator circuits requiring ultra-low quiescent power.
For engineers reviewing the MAX923CSA datasheet, MAX923CSA pinout, MAX923CSA application, or MAX923CSA equivalent, key selection criteria include guaranteed hysteresis implementation without external feedback, rail-to-rail input range (V− to V+ −1.3V), 12µs propagation delay at 10mV overdrive, 40mA continuous output source capability, and SO-8 package compatibility with industrial-grade thermal performance.
Technical Context
The MAX923CSA integrates two independent comparators sharing a common internal reference and hysteresis control path. Its HYST pin enables precise, resistor-programmable hysteresis applied identically to both comparators-eliminating need for external positive-feedback networks. Input common-mode range extends from V− to (V+ − 1.3V), supporting operation near supply rails.
Output stage architecture continuously sources up to 40mA while avoiding crowbar current during transitions, minimizing supply-line parasitic feedback. Reference output (REF) is referenced to V−, not GND, and delivers 1.182V ±1% over 0°C to +70°C with ±6µA sourcing/sinking capability under specified load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - enables direct interface with 3V/5V logic and bipolar sensor signals |
| Quiescent Supply Current | ≤6µA at +25°C, ≤7.5µA over 0°C to +70°C - ensures multi-year battery life in always-on monitoring systems |
| Reference Voltage Accuracy | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold for precision level detection |
| Propagation Delay | 12µs at 10mV overdrive - supports medium-speed event detection (e.g., power-good assertion, fault latching) |
| Output Drive Capability | 40mA continuous source, >5mA sink - directly drives LEDs, small relays, or logic inputs without external buffers |
| Input Offset Voltage | ±10mV - defines minimum detectable differential signal without calibration |
| Hysteresis Control | HYST pin accepts 1.132V–1.182V (REF −50mV to REF) - sets symmetric hysteresis band up to 100mV via two resistors |
Pinout & Package
MAX923CSA is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints and reflow-solderable per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - sinks and sources current; swings from V+ to V− (not GND); requires V− connection for proper dual-supply swing |
| 2 | V+ | Positive supply - accepts +2.5V to +11V (single) or connects to +V rail (dual) |
| 3 | REF | Internal 1.182V reference output - referenced to V−, not GND; must not be bypassed |
| 4 | HYST | Hysteresis control input - voltage between REF and HYST sets hysteresis band width for both comparators |
| 5 | INB− | Inverting input of comparator B - supports rail-to-rail common-mode range (V− to V+ −1.3V) |
| 6 | INA+ | Noninverting input of comparator A - shares same input voltage range and leakage spec (±0.01nA typical) |
| 7 | V− | Negative supply - connect to GND for single-supply operation; defines reference and output swing baseline |
| 8 | OUTA | Comparator A output - identical drive strength and logic behavior as OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Enables matched thresholding for window detection using one precision reference, reducing component count and drift mismatch |
| Pin-controlled hysteresis (HYST) | Eliminates need for external feedback resistors and op-amp stages - simplifies PCB layout and improves noise immunity |
| 40mA continuous output source | Drives LEDs, optocouplers, or MOSFET gates directly - avoids external driver ICs in low-power sensing nodes |
| No crowbar switching current | Prevents supply rail disturbance during output transitions - enhances stability in poorly decoupled or high-impedance supply environments |
| Rail-to-rail input range | Accepts signals from V− to V+ −1.3V - supports direct interfacing with sensors, battery monitors, and DAC outputs without level-shifting |
Applications
| Battery-Powered Threshold Detector | Window Comparator (Undervoltage/Overvoltage) |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage to trigger low-battery warning at 3.2V and disable charging above 4.3V. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against two reference-derived thresholds; HYST pin configures 50mV hysteresis per channel to prevent chatter near trip points. Use Value: Single MAX923CSA replaces discrete comparator + reference + hysteresis circuit, cutting BOM cost by 40% and board area by 65%. | Use Scenario: Validating regulated 5V supply in portable medical device before enabling analog front-end. IC Role / Device Role / Timing Role: INA+ and INB− tied to resistor divider network; REF and HYST set upper/lower bounds; OUTA and OUTB feed AND gate for "power-good" logic. Use Value: Guaranteed ±1% reference accuracy and matched comparator offsets ensure <±25mV total threshold error across temperature. |
| Oscillator Circuit (Relaxation) | Auto-Off Power Switch |
Use Scenario: Generating 1Hz timing signal for low-power microcontroller wake-up using RC network and internal hysteresis. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger; HYST and REF define hysteresis band; capacitor charges/discharges between thresholds. Use Value: 6µA quiescent current enables oscillator to consume <1µW average power - suitable for decade-long coin-cell operation. | Use Scenario: Enabling 40mA load only when momentary switch is pressed, then auto-disabling after 90 seconds. IC Role / Device Role / Timing Role: MAX923CSA comparator monitors RC timer voltage; output drives P-MOSFET gate; HYST sets hysteresis to prevent oscillation during timeout decay. Use Value: 40mA output drive directly switches load FET; 2.5µA effective system quiescent current extends battery life beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | No internal reference; no hysteresis pin; higher 1mA supply current; open-collector outputs require pull-up | Suitable only where external reference and hysteresis are acceptable; cannot replicate single-supply REF/HYST functionality | Select LM393DR only if cost is primary constraint and design can accommodate external components and higher power |
| TLV3702IDR | Lower 850nA quiescent current but no integrated reference; rail-to-rail I/O; 1.8V–16V supply; no HYST pin | Requires external reference and hysteresis network; better for ultra-low-power apps where reference is already present | Choose TLV3702IDR when system-level reference exists and sub-1µA supply current is mandatory |
Compared with LM393DR and TLV3702IDR, the MAX923CSA uniquely integrates reference and hysteresis control in an SO-8 package, eliminating four external components and reducing total solution power by >99% versus LM393DR - critical for sealed battery-operated devices.
Availability
MAX923CSA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor interfaces, and portable medical devices requiring stable component supply with guaranteed long-term availability.
Supply support for MAX923CSA 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 in industrial, automotive, and computing markets.
The MAX921–MAX924 family was engineered specifically for ultra-low-power threshold detection in energy-constrained systems - prioritizing sub-10µA operation, integrated references, and robust output drive without compromising speed or noise performance.
FAQ
What is the maximum supply voltage for MAX923CSA in single-supply operation?
The MAX923CSA supports a single-supply voltage range of +2.5V to +11V. When operated with V− connected to GND, the absolute maximum voltage applied between V+ and GND is +11V. Exceeding this may cause permanent damage, as specified in the Absolute Maximum Ratings table.
Can MAX923CSA operate from a ±5V dual supply?
Yes, the MAX923CSA operates from dual supplies ranging from ±1.25V to ±5.5V. With V+ = +5V and V− = −5V, the device maintains full functionality including reference output (1.182V above V−), rail-to-rail input range, and output swing from +5V to −5V - enabling direct bipolar signal comparison.
How is hysteresis configured on the MAX923CSA?
Hysteresis on the MAX923CSA is configured using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band equals twice (REF − VHYST); maximum band is 100mV. This method applies identical hysteresis to both comparators without external feedback.
Does the internal reference of MAX923CSA require an external bypass capacitor?
No - the MAX923CSA reference output must not be bypassed. Capacitive loading degrades stability and increases noise. Layout best practice is to keep the REF trace short and isolated from noisy signals, especially outputs, to avoid crosstalk-induced reference noise exceeding 1mVPP.
What is the guaranteed input common-mode voltage range for MAX923CSA?
The guaranteed input common-mode voltage range for MAX923CSA is from V− to (V+ − 1.3V) across the full operating temperature range. For example, with V+ = 5V and V− = 0V, inputs may swing from 0V to 3.7V - supporting direct interface with most 3.3V and 5V sensor outputs.
MAX923CSA 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX923CSA FAQ
1.How can I place an order for MAX923CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923CSA 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 MAX923CSA reliable?
The price and inventory of MAX923CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923CSA is usually 5 days.
3.What payment methods are accepted for MAX923CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923CSA?
MAX923CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923CSA 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 MAX923CSA?
For technical support, including MAX923CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923CSA requirements.
6.How does Aetrix verify that MAX923CSA is sourced from the original manufacturer or authorized distributors?
All MAX923CSA 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 MAX923CSA meets industry standards.
7.What is the process for return or replacement of MAX923CSA?
All MAX923CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX923CSA, 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 MAX923CSA part is unused and in its original packaging.
Return procedure for MAX923CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923CSA Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM393DR
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LM239DR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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