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Analog Devices Inc./Maxim Integrated MAX923EPA+
- Part No.:
- MAX923EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX923EPA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,439
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Product details
Overview
The MAX923EPA+ 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 MAX923EPA+ datasheet, MAX923EPA+ pinout, MAX923EPA+ application, or MAX923EPA+ equivalent, key selection criteria include guaranteed hysteresis implementation without external feedback, ultra-low supply current at extended temperature, dual-comparator integration in 8-pin DIP, and compatibility with 3V/5V systems requiring high noise immunity and output drive capability.
Technical Context
The MAX923EPA+ integrates two independent comparators sharing a common internal 1.182V reference and a dedicated HYST pin for simultaneous hysteresis programming on both channels. Its input common-mode range extends from V– to (V+ – 1.3V), enabling operation near supply rails, and its output stage eliminates crowbar current during transitions-reducing parasitic supply feedback and improving layout robustness.
Unlike MAX922 (no reference) or MAX924 (quad, no hysteresis pin), the MAX923EPA+ uniquely combines dual comparators, precision reference, and adjustable hysteresis in one 8-pin package-enabling compact window detectors and auto-off power switches without external components for reference or hysteresis control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; enables direct use in 3V/5V/9V battery or industrial rails without regulation |
| Quiescent Current | ≤6µA at –40°C to +85°C; supports >1-year battery life in always-on sensor nodes |
| Reference Voltage | 1.182V ±1% (E-temp); provides stable, factory-trimmed threshold for accurate undervoltage/overvoltage detection |
| Propagation Delay | 14µs typical at 10mV overdrive; ensures timely response in timing-critical window monitoring |
| Output Drive | 40mA continuous source / 50mA sink; directly drives LEDs, MOSFET gates, or logic inputs without buffer stages |
| Input Offset Voltage | ±10mV max; minimizes false triggering in low-differential-signal applications like battery voltage monitoring |
| Hysteresis Control | HYST pin accepts 0–50mV below REF; enables precise, resistor-programmable hysteresis bands up to 100mV |
Pinout & Package
MAX923EPA+ uses an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch; lead finish is matte tin.
| 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; defines reference and input common-mode floor |
| 3 | INA+ | Noninverting input of Comparator A; accepts signals from V– to (V+ – 1.3V) |
| 4 | INA– | Inverting input of Comparator A; matched offset and leakage with INA+ for precision thresholding |
| 5 | INB– | Inverting input of Comparator B; electrically identical to INA–; enables symmetrical window detector design |
| 6 | HYST | Hysteresis control input; voltage relative to REF sets hysteresis band width for both comparators |
| 7 | REF | 1.182V reference output referenced to V–; supplies stable bias for thresholds and HYST network |
| 8 | V+ | Positive supply rail; supports up to +11V; powers comparators, reference, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference in 8-pin DIP | Reduces BOM count and PCB area vs. discrete reference + dual comparator solutions |
| Programmable hysteresis via HYST pin | Eliminates need for external positive-feedback resistors and associated layout sensitivity |
| 40mA continuous output source current | Drives LEDs, small relays, or logic inputs directly-no external driver required |
| No crowbar switching current | Prevents supply rail disturbance during output transitions-improves system stability |
| Rail-to-rail input range (V– to V+ – 1.3V) | Supports full-scale sensing in low-voltage battery systems without level-shifting circuitry |
Applications
| Battery Voltage Monitoring | Window Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage (2.5V–4.2V) to trigger undervoltage lockout and overvoltage protection before charging/discharging. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against upper/lower thresholds derived from internal REF and resistor dividers. Use Value: Eliminates external reference IC and reduces hysteresis component count by 4× versus discrete solutions. |
Use Scenario: Detecting valid 5V power supply range (4.5V–5.5V) in embedded controllers to assert POWER_GOOD signal. IC Role / Device Role / Timing Role: Comparator A monitors lower threshold (undervoltage), Comparator B monitors upper threshold (overvoltage); outputs ANDed for clean window indication. Use Value: Internal REF ensures matching thresholds; HYST pin enables identical hysteresis on both channels without mismatch error. |
| Auto-Off Power Switch | LED Bar-Graph Level Indicator |
|
Use Scenario: Enabling timed shutdown of peripheral circuitry after button press in portable medical devices. IC Role / Device Role / Timing Role: Single comparator (A or B) acts as timer-triggered switch using RC network on IN+; output drives load directly. Use Value: 3.5µA quiescent current extends battery life; 40mA output drives 100Ω load without external FET. |
Use Scenario: Visual battery charge level display using four LEDs driven by cascaded voltage thresholds. IC Role / Device Role / Timing Role: Each comparator channel compares divided VIN against REF-derived thresholds; outputs sink LED current. Use Value: Output sourcing capability allows direct LED anode connection to V+, simplifying PCB routing and reducing component count. |
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 |
|---|---|---|---|
| MAX923ESA+ | Same electrical specs; SO-8 package instead of DIP; surface-mount only | Requires rework for through-hole assembly; better thermal performance at high ambient | Select for automated SMT production or space-constrained layouts where DIP footprint is unacceptable |
| TLV3702IDR | No internal reference; no HYST pin; 1.8V–16V supply; 850nA quiescent current | Requires external reference and hysteresis resistors; higher accuracy but higher BOM cost and layout complexity | Select when ultra-low power (<1µA) dominates over integration; not drop-in for REF/HYST-dependent designs |
Compared with MAX923ESA+ and TLV3702IDR, the MAX923EPA+ delivers unique value in through-hole prototyping and low-volume manufacturing where internal reference and HYST-controlled hysteresis reduce design iteration time and eliminate trimming steps-without sacrificing temperature range or output drive.
Availability
MAX923EPA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MAX923EPA+ 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 automotive markets.
The MAX921–MAX924 family was engineered specifically for ultra-low-power, single-supply comparator applications requiring integrated reference and hysteresis-targeting portable instrumentation, battery management, and energy-harvesting systems.
FAQ
What is the operating temperature range of the MAX923EPA+?
The MAX923EPA+ is rated for –40°C to +85°C (Extended temperature range). This is confirmed in the Ordering Information table and Electrical Characteristics sections, where all C/E/M temp range data are explicitly separated-and E-temp parameters (e.g., supply current ≤6µA, reference ±1.206V) apply directly to MAX923EPA+.
Does the MAX923EPA+ include an internal voltage reference?
Yes, the MAX923EPA+ includes a factory-trimmed 1.182V ±1% bandgap voltage reference referenced to V–, accessible at the REF pin. This is documented in the General Description, Features list, Electrical Characteristics tables (Reference Voltage row), and Pin Descriptions-where REF is defined as "Reference output. 1.182V with respect to V–."
How is hysteresis implemented on the MAX923EPA+?
Hysteresis on the MAX923EPA+ is implemented via the HYST pin: connecting two resistors between REF, HYST, and V– sets a voltage offset that adjusts the hysteresis band width for both comparators simultaneously. The HYST input range is REF – 0.05V to REF, enabling up to 100mV total hysteresis-fully detailed in the Applications Information section.
What is the maximum continuous output source current of the MAX923EPA+?
The MAX923EPA+ continuously sources up to 40mA per output, as stated in the General Description ("unique output stage continuously sources as much as 40mA") and verified in Typical Operating Characteristics (SHORT-CIRCUIT SOURCE CURRENT vs. SUPPLY VOLTAGE plot showing ≥40mA at V+ = 5V).
Can the MAX923EPA+ operate from a dual supply?
Yes, the MAX923EPA+ supports dual-supply operation from ±1.25V to ±5.5V. The Absolute Maximum Ratings specify V+ to V– stress limits, and the Power Supplies feature bullet explicitly lists "Dual ±1.25V to ±5.5V". Input common-mode range and output swing are defined relative to V–, confirming true dual-rail capability.
MAX923EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
MAX923EPA+ FAQ
1.How can I place an order for MAX923EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923EPA+ 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 MAX923EPA+ reliable?
The price and inventory of MAX923EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923EPA+ is usually 5 days.
3.What payment methods are accepted for MAX923EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923EPA+?
MAX923EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923EPA+ 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 MAX923EPA+?
For technical support, including MAX923EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923EPA+ requirements.
6.How does Aetrix verify that MAX923EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX923EPA+ 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 MAX923EPA+ meets industry standards.
7.What is the process for return or replacement of MAX923EPA+?
All MAX923EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX923EPA+, 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 MAX923EPA+ part is unused and in its original packaging.
Return procedure for MAX923EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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