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Analog Devices Inc./Maxim Integrated MAX923CUA+T
- Part No.:
- MAX923CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX923CUA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
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Product details
Overview
The MAX923CUA+T from Maxim Integrated is a dual, micropower, single/dual-supply comparator with integrated 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It draws ≤6µA supply current over temperature (C-grade), supports input common-mode range from V− to V+ − 1.3V, and delivers TTL/CMOS-compatible outputs capable of sourcing up to 40mA. It is used in battery-powered threshold detection and window comparator circuits operating from +2.5V to +11V single supply.
For engineers reviewing the MAX923CUA+T datasheet, MAX923CUA+T pinout, MAX923CUA+T application, or MAX923CUA+T equivalent, key selection criteria include ultra-low quiescent current, internal reference accuracy, hysteresis configurability without external feedback, and rail-to-rail input operation with output swing from V+ to V−.
Technical Context
The MAX923CUA+T integrates two independent comparators sharing a single internal 1.182V reference and one HYST pin for simultaneous hysteresis programming on both channels. Its unique output stage eliminates crowbar current during transitions, minimizing supply-line parasitic feedback and improving stability without requiring tight layout controls.
It operates from a single +2.5V to +11V supply (or ±1.25V to ±5.5V dual supply), with inputs functional from V− to V+ − 1.3V and outputs swinging fully from V+ to V−. Propagation delay is 12µs typical at 10mV overdrive with 100pF load, and input offset voltage is ±10mV max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤6µA max over 0°C to +70°C - enables multi-year battery life in always-on sensing nodes |
| Reference Voltage | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold for precision level detection |
| Input Common-Mode Range | V− to V+ − 1.3V - supports direct sensing near ground or high-side rails without level shifting |
| Propagation Delay | 12µs typical (10mV overdrive, 100pF load) - suitable for medium-speed monitoring in power sequencing and fault detection |
| Output Drive | Sources ≥40mA continuously - directly drives LEDs, small relays, or logic inputs without external buffers |
| Input Offset Voltage | ±10mV max - ensures reliable switching within 20mV hysteresis bands for noise-immune thresholding |
| Hysteresis Control | Single HYST pin adjusts hysteresis band up to 100mV via two resistors - eliminates need for separate feedback networks per comparator |
Pinout & Package
MAX923CUA+T is housed in an 8-pin μMAX® package (2.1mm × 2.1mm, 0.5mm pitch), pin-compatible with industry-standard 8-pin SO and DIP footprints but with 60% smaller footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V− for single-supply operation; defines output low level |
| 2 | V− | Negative supply rail; tied to GND in single-supply mode; sets reference and output lower bound |
| 3 | INA+ | Noninverting input of Comparator A - accepts signals up to V+ − 1.3V |
| 4 | INA− | Inverting input of Comparator A - differential pair input with ±5nA leakage (C/E grade) |
| 5 | INB− | Inverting input of Comparator B - electrically isolated from INA−; enables independent dual-channel comparison |
| 6 | HYST | Hysteresis control node - voltage between REF and HYST sets hysteresis band (max 50mV Δ); shared by both comparators |
| 7 | REF | 1.182V reference output referenced to V− - supplies precision voltage for threshold generation and HYST biasing |
| 8 | V+ | Positive supply rail - supports 2.5V–11V single supply or ±1.25V–±5.5V dual supply |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference in μMAX | Integrates two precision comparators and 1.182V ±1% reference in smallest 8-pin SO-compatible package (2.1mm × 2.1mm) |
| Programmable hysteresis via HYST pin | Enables consistent, resistor-set hysteresis on both comparators using only two external resistors - no op-amp feedback required |
| No crowbar output switching | Eliminates supply-rail glitches during output transitions - improves system stability and reduces need for local bypassing |
| Rail-to-rail input with V+ − 1.3V headroom | Accepts input signals down to V− and up to within 1.3V of V+, enabling direct interface with sensors and DACs without clamping diodes |
| TTL/CMOS-compatible sourcing output | Outputs source ≥40mA continuously - directly drives logic inputs, LEDs, or MOSFET gates without pull-up resistors or buffers |
Applications
| Battery-Powered Threshold Detector | Window Comparator (Undervoltage/Overvoltage) |
|---|---|
Use Scenario: Monitoring lithium-ion cell voltage to trigger low-battery warning or shutdown before deep discharge. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (overvoltage) and lower (undervoltage) thresholds derived from internal REF and resistor dividers. Use Value: Leverages shared HYST pin to apply matched hysteresis to both thresholds, preventing chatter near trip points while consuming only 6µA total quiescent current. | Use Scenario: Validating regulated 5V supply integrity in embedded controllers, asserting "power good" only when voltage stays within 4.5V–5.5V window. IC Role / Device Role / Timing Role: MAX923CUA+T implements dual-threshold detection: OUTA asserts low on undervoltage, OUTB asserts low on overvoltage; ANDed outputs yield active-high power-good signal. Use Value: Internal 1.182V reference and resistor-programmable thresholds eliminate external references, reducing BOM count and layout area in space-constrained modules. |
| Oscillator Circuit (Relaxation) | Auto-Off Power Switch |
Use Scenario: Generating low-frequency clock signals (e.g., 1–10Hz) for LED blinkers or sensor sampling in energy-harvesting systems. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger with RC network on IN+ and HYST; second comparator monitors timing capacitor voltage. Use Value: Programmable hysteresis via HYST pin sets precise oscillation frequency without trimming capacitors or external op-amps - ideal for production-stable timing with minimal components. | Use Scenario: Enabling momentary-switch-activated power delivery to peripherals (e.g., USB devices, displays), automatically disabling after timeout to conserve battery. IC Role / Device Role / Timing Role: MAX923CUA+T comparator controls MOSFET gate; RC network on HYST/REF sets auto-off delay; internal reference ensures consistent trip point across temperature. Use Value: 40mA output drive directly switches logic-level MOSFETs; 6µA quiescent current extends timeout duration without compromising standby life - e.g., 92-second timeout with 2MΩ/10µF. |
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; 1mA typical supply current; open-collector outputs require pull-ups | Requires external reference and hysteresis circuitry; higher power draw limits battery life | Select when cost is primary constraint and external components are acceptable for threshold setting |
| TLV3702IDR | Includes rail-to-rail inputs and 1.2V reference, but no dedicated hysteresis pin; 850nA supply current; 360µs propagation delay | Slower response limits use in fast fault detection; reference not trimmed to ±1%; hysteresis requires external feedback | Select for ultra-low-power applications where speed < 100µs is not required and reference tolerance > ±2% is acceptable |
Compared with LM393DR and TLV3702IDR, the MAX923CUA+T uniquely combines sub-µA-class quiescent current, factory-trimmed 1.182V ±1% reference, and single-pin hysteresis programming - delivering lowest component count and longest battery life for precision dual-threshold detection in compact designs.
Availability
MAX923CUA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with guaranteed long-term availability.
Supply support for MAX923CUA+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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable electronics.
The MAX921–MAX924 family was engineered specifically for ultra-low-power, high-accuracy threshold detection in space- and energy-constrained systems - emphasizing micropower operation, integrated references, and simplified hysteresis implementation.
FAQ
What is the maximum supply voltage for MAX923CUA+T in single-supply operation?
The MAX923CUA+T supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains full specification compliance including input common-mode range (V− to V+ − 1.3V), output drive capability, and reference accuracy. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX923CUA+T support dual-supply operation, and what are the limits?
Yes, MAX923CUA+T operates from dual supplies ranging from ±1.25V to ±5.5V. In this configuration, V+ connects to the positive rail and V− to the negative rail; GND is left unconnected. The output swings from V+ to V−, and the internal reference remains referenced to V−, enabling bipolar signal monitoring with TTL/CMOS compatibility at ±5V.
How is hysteresis implemented on MAX923CUA+T, and can it be applied independently to each comparator?
Hysteresis on MAX923CUA+T is implemented via the HYST pin, which accepts a voltage between REF − 0.05V and REF. This single pin configures identical hysteresis on both comparators using two external resistors (R1 from REF to HYST, R2 from HYST to V−). Independent hysteresis per channel is not supported - the architecture ensures matched hysteresis behavior across both channels.
What is the output voltage swing specification for MAX923CUA+T?
The MAX923CUA+T outputs swing fully from V+ to V− under load. With IOUT = 1.8mA (C/E grade), output high is ≥V+ − 0.4V and output low is ≤V− + 0.4V. This rail-to-rail output drive enables direct interfacing with TTL/CMOS logic and eliminates need for level-shifting components in most applications.
Can the internal reference of MAX923CUA+T be used to bias external circuitry?
Yes, the REF pin provides a 1.182V ±1% voltage referenced to V−, capable of sourcing up to 25µA (typical) and sinking up to 15µA (typical) at +25°C. It is designed for driving high-impedance divider networks and HYST biasing. Do not bypass REF, and avoid capacitive coupling from outputs to REF to prevent noise injection - peak-to-peak noise is ~1mV.
MAX923CUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-uMAX/uSOP
MAX923CUA+T FAQ
1.How can I place an order for MAX923CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923CUA+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 MAX923CUA+T reliable?
The price and inventory of MAX923CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923CUA+T is usually 5 days.
3.What payment methods are accepted for MAX923CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923CUA+T?
MAX923CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923CUA+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 MAX923CUA+T?
For technical support, including MAX923CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923CUA+T requirements.
6.How does Aetrix verify that MAX923CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX923CUA+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 MAX923CUA+T meets industry standards.
7.What is the process for return or replacement of MAX923CUA+T?
All MAX923CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX923CUA+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 MAX923CUA+T part is unused and in its original packaging.
Return procedure for MAX923CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923CUA+T Tags
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LM2903P
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NCX2200GMAZ
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