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Analog Devices Inc./Maxim Integrated MAX923CSA+T
- Part No.:
- MAX923CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923CSA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,266
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Product details
Overview
The MAX923CSA+T from Maxim Integrated is a dual, micropower, low-voltage comparator with integrated 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 temperature, supports rail-to-rail input swing down to V− and within 1.3V of V+, and delivers TTL/CMOS-compatible outputs sourcing up to 40mA - ideal for battery-powered threshold detection in portable instrumentation.
For engineers reviewing the MAX923CSA+T datasheet, MAX923CSA+T pinout, MAX923CSA+T application, or MAX923CSA+T equivalent, key selection criteria include its dual-comparator architecture with shared reference and hysteresis control, ultra-low supply current at extended temperature (−40°C to +85°C), SO-8 package compatibility, and verified use in window detectors and auto-off power switches requiring stable trip points and minimal quiescent drain.
Technical Context
The MAX923CSA+T integrates two independent comparators sharing a precision 1.182V reference referenced to V−, with dedicated IN+/IN− pairs per channel and a common HYST pin enabling simultaneous hysteresis programming for both channels using two external resistors. Its output stage eliminates crowbar current during transitions, ensuring stability without bypassing and minimizing parasitic feedback.
Input common-mode range extends from V− to (V+ − 1.3V); output swings from V+ to V− (not GND), supporting true dual-supply operation. The device features <±10mV input offset voltage, <±5nA input leakage (C/E temp), and 12µs propagation delay at 10mV overdrive - all specified across −40°C to +85°C for the ESA grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - enables direct interface with 3V/5V logic and bipolar sensor signals. |
| Quiescent Supply Current | ≤6µA at −40°C to +85°C - ensures multi-year battery life in always-on monitoring systems. |
| Reference Voltage | 1.182V ±1% (0°C to +70°C), ±1.2% (−40°C to +85°C) - provides stable trip point for precision thresholding without external reference. |
| Input Offset Voltage | ±10mV max - limits trip uncertainty in low-overdrive applications such as slow-moving analog inputs. |
| Propagation Delay | 12µs at 10mV overdrive, 4µs at 100mV - supports kHz-range signal monitoring with deterministic timing. |
| Output Drive Capability | Sources ≥40mA continuously, sinks ≥5mA - directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - accommodates ground-referenced or negative-biased sensor outputs in mixed-supply systems. |
Pinout & Package
MAX923CSA+T is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints and compliant with JEDEC MS-012AC. Thermal performance: 471mW max continuous power dissipation at +70°C, derating 5.88mW/°C above.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V− for single-supply operation; output swings from V+ to V−. |
| 2 | V− | Negative supply rail; sets reference and output lower bound; required for dual-supply mode. |
| 3 | INA+ | Noninverting input of comparator A - accepts signals from V− to (V+ − 1.3V). |
| 4 | INA− | Inverting input of comparator A - used with INA+ to define first threshold condition. |
| 5 | INB− | Inverting input of comparator B - enables second independent comparison path. |
| 6 | HYST | Hysteresis control input - sets hysteresis band width (up to 100mV) for both comparators via resistor divider to REF. |
| 7 | REF | 1.182V reference output referenced to V− - supplies precise voltage for threshold generation and HYST biasing. |
| 8 | V+ | Positive supply rail - powers internal circuitry and defines output high level (V+ − 0.4V min). |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Reduces component count and layout area in window detectors by eliminating duplicate references. |
| Programmable hysteresis via HYST pin | Enables precise, resistor-set hysteresis (0–100mV) on both channels simultaneously without feedback networks or PCB routing complexity. |
| No crowbar output switching current | Prevents supply rail disturbance during output transitions - eliminates need for local bypass capacitors near V+ or V−. |
| Rail-to-rail input range | Supports direct connection to sensors operating at V− or near V+, including thermocouples and current-sense amplifiers. |
| TTL/CMOS-compatible outputs | Drives standard logic families directly when V+ = 5V and V− = 0V; maintains compatibility across supply voltages. |
Applications
| Battery-Powered Threshold Detector | Window Comparator (UV/OV Monitor) |
|---|---|
|
Use Scenario: Detecting low battery voltage in handheld medical devices before shutdown. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (5.5V) and lower (4.5V) thresholds using resistor dividers and shared REF/HYST. Use Value: Eliminates external reference IC and reduces total solution current to <6µA, extending runtime by >30% versus discrete alternatives. |
Use Scenario: Monitoring 5V system rail for undervoltage lockout and overvoltage protection in industrial PLC I/O modules. IC Role / Device Role / Timing Role: MAX923CSA+T implements active-low UV and OV flags; ANDed outputs generate "power-good" signal. Use Value: Programmable hysteresis prevents chatter near trip points under noisy supply conditions, improving system reliability. |
| Oscillator Circuit (Relaxation) | Auto-Off Power Switch |
|
Use Scenario: Generating precise timing pulses in low-power sensor wake-up circuits. IC Role / Device Role / Timing Role: One comparator charges capacitor via resistor; second comparator discharges it when threshold crossed - forming astable multivibrator. Use Value: Ultra-low quiescent current ensures oscillator consumes <6µA idle, enabling microamp-level sleep modes. |
Use Scenario: Enabling timed power-down of peripheral circuits after user inactivity in IoT edge nodes. IC Role / Device Role / Timing Role: Comparator monitors RC decay voltage; output controls MOSFET gate to cut power after ~90s timeout. Use Value: High 40mA source capability directly drives gate without level shifter; 2.5µA typical quiescent draw minimizes standby loss. |
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; requires external voltage divider or reference; higher 100µA supply current; no hysteresis pin. | Suitable only where external reference is acceptable and power budget allows >15× higher quiescent draw. | Select LM393DR only if cost is primary constraint and design can accommodate external reference and higher current. |
| TLV3702IDR | Lower 800nA quiescent current but no internal reference; rail-to-rail input/output; no HYST pin; 1.8V–10V supply range. | Requires external reference and hysteresis network; better for ultra-low-power designs where reference is already present. | Choose TLV3702IDR when system already includes precision reference and lowest possible supply current is critical. |
Compared with LM393DR and TLV3702IDR, the MAX923CSA+T uniquely combines integrated reference, programmable hysteresis, and 40mA output drive in a single SO-8 package - reducing BOM count, PCB area, and design validation effort for battery-critical threshold detection.
Availability
MAX923CSA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power monitoring, and portable medical devices requiring stable component supply with guaranteed −40°C to +85°C operation and long-term traceability.
Supply support for MAX923CSA+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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX921–MAX924 family was designed specifically for ultra-low-power, precision threshold detection in space- and energy-constrained systems - emphasizing micropower operation, integrated references, and robust output drive without compromising accuracy.
FAQ
What is the maximum supply voltage for MAX923CSA+T in single-supply operation?
The MAX923CSA+T supports a single-supply voltage range of +2.5V to +11V. When operated with V− tied to GND, the absolute maximum V+ is +11V. Exceeding this risks permanent damage, as confirmed by Absolute Maximum Ratings specifying V+ to V− ≤ +12V and V+ to GND ≤ +12V. Operation at 11V is fully characterized across −40°C to +85°C.
Does MAX923CSA+T require external hysteresis components?
No - the MAX923CSA+T includes a dedicated HYST pin enabling programmable hysteresis for both comparators using just two external resistors (R1 between REF and HYST, R2 between HYST and V−). This eliminates need for feedback networks or op-amp-based hysteresis circuits, simplifying design and reducing board area.
Can MAX923CSA+T operate from a ±5V dual supply?
Yes - the MAX923CSA+T is explicitly rated for dual-supply operation from ±1.25V to ±5.5V. With V+ = +5V and V− = −5V, inputs swing from −5V to +3.7V, outputs swing from +5V to −5V, and the 1.182V reference remains referenced to V− (−5V), yielding a REF voltage of −3.818V relative to GND - enabling bipolar signal conditioning.
What is the guaranteed input offset voltage for MAX923CSA+T?
The MAX923CSA+T has a guaranteed input offset voltage of ±10mV maximum across the full operating temperature range (−40°C to +85°C), as specified in the Electrical Characteristics table under "COMPARATOR / Input Offset Voltage" with VCM = 2.5V. This value applies to both comparator channels independently.
Is the reference output of MAX923CSA+T referenced to GND or V−?
The REF pin of MAX923CSA+T outputs 1.182V with respect to V−, not GND. This is explicitly stated in the Pin Descriptions ("Reference output. 1.182V with respect to V−") and impacts hysteresis design: when V− = GND, REF = 1.182V; when V− = −5V, REF = −3.818V. Bypassing REF is prohibited per datasheet guidance.
MAX923CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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+T FAQ
1.How can I place an order for MAX923CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923CSA+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 MAX923CSA+T reliable?
The price and inventory of MAX923CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923CSA+T is usually 5 days.
3.What payment methods are accepted for MAX923CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923CSA+T?
MAX923CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923CSA+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 MAX923CSA+T?
For technical support, including MAX923CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923CSA+T requirements.
6.How does Aetrix verify that MAX923CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX923CSA+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 MAX923CSA+T meets industry standards.
7.What is the process for return or replacement of MAX923CSA+T?
All MAX923CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX923CSA+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 MAX923CSA+T part is unused and in its original packaging.
Return procedure for MAX923CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923CSA+T Tags
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LM339DR
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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