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Analog Devices Inc./Maxim Integrated MAX923MJA
- Part No.:
- MAX923MJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX923MJA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,824
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Product details
Overview
MAX923MJA 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 ≤4µA quiescent current over –55°C to +125°C, supports 2.5V–11V single or ±1.25V–±5.5V dual supplies, and features TTL/CMOS-compatible outputs that source up to 40mA - ideal for high-reliability battery-powered threshold detection in aerospace and military systems.
For engineers reviewing the MAX923MJA datasheet, MAX923MJA pinout, MAX923MJA application, or MAX923MJA equivalent, this page delivers verified electrical parameters, military-grade CERDIP package details, dual-comparator hysteresis implementation guidance, and validated alternatives for ruggedized analog sensing designs.
Technical Context
The MAX923MJA integrates two independent comparators sharing one internal 1.182V reference and a dedicated HYST pin enabling simultaneous, resistor-programmable hysteresis on both channels without external feedback. Its output stage eliminates crowbar current during transitions, suppressing supply-line parasitic feedback and ensuring stability in noisy environments.
Input common-mode range extends from V− to (V+ − 1.3V), supporting rail-to-rail sensing in single-supply configurations (e.g., 3V or 5V) and bipolar operation (e.g., ±5V). The REF pin is referenced to V−, not GND, and must not be bypassed - critical for maintaining ±1% reference accuracy across the full military temperature range.
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 interfacing with 3V/5V logic and legacy ±5V analog systems. |
| Quiescent Current | ≤4µA max over –55°C to +125°C - ensures multi-year battery life in unattended remote sensors. |
| Reference Voltage | 1.182V ±1% (0°C to +70°C), ±1.2% over full military range - provides stable trip-point generation without external precision references. |
| Propagation Delay | 12µs typical at 10mV overdrive - balances speed and ultra-low power for slow-varying thresholds like voltage monitoring. |
| Output Drive | Sources 40mA continuously, sinks 5mA minimum - directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Input Offset Voltage | ±10mV max over –55°C to +125°C - defines minimum detectable differential signal in precision window detectors. |
| Hysteresis Control | HYST pin accepts 0–50mV below REF - enables precise, matched hysteresis bands (up to 100mV) on both comparators using two resistors. |
Pinout & Package
MAX923MJA is housed in an 8-pin CERDIP (Ceramic Dual In-line Package) rated for –55°C to +125°C operation, with hermetic sealing suitable for high-reliability aerospace and defense applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks and sources current; swings from V+ to V− - supports true dual-supply level translation. |
| 2 | V+ | Positive supply input - accepts up to +11V (single) or +5.5V (dual); decoupling recommended for noise-sensitive applications. |
| 3 | REF | 1.182V reference output referenced to V− - must remain unbypassed; capable of sourcing 15µA/sinking 8µA. |
| 4 | HYST | Hysteresis control input - voltage between REF and HYST sets hysteresis band (0–100mV) for both comparators. |
| 5 | INB− | Inverting input of comparator B - common-mode range extends to V−, enabling ground-referenced sensing. |
| 6 | V− | Negative supply - connect to GND for single-supply use; required for dual-supply operation and output swing control. |
| 7 | OUTA | Comparator A output; identical drive capability to OUTB - allows independent control of two decision paths. |
| 8 | INA+ | Noninverting input of comparator A - high-impedance (leakage < ±5nA) for minimal loading of sensor dividers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference in one die | Reduces BOM count and PCB area vs. discrete reference + dual-comparator solutions - critical for SWaP-constrained platforms. |
| No crowbar output switching | Eliminates supply rail glitches during output transitions - removes need for aggressive supply decoupling in mixed-signal layouts. |
| Programmable hysteresis via HYST pin | Enables matched, resistor-set hysteresis on both comparators simultaneously - simplifies window detector design and improves noise immunity. |
| Military temperature grade (–55°C to +125°C) | Qualified per MIL-PRF-38535 Class K or equivalent - supports deployment in engine bays, avionics bays, and space-qualified electronics. |
| 8-pin CERDIP package | Hermetically sealed ceramic construction with low moisture ingress - ensures long-term reliability under thermal cycling and humidity stress. |
Applications
| Power-Good Monitoring | Battery Undervoltage Lockout |
|---|---|
|
Use Scenario: Monitoring 5V system rail for valid operating range (e.g., 4.5V–5.5V window) in flight control computers. IC Role / Device Role / Timing Role: Dual comparator implements precise undervoltage (OUTA) and overvoltage (OUTB) detection with shared REF and HYST pins. Use Value: Eliminates need for external voltage dividers and hysteresis resistors per channel - reduces component count by ≥40% vs. discrete solutions. |
Use Scenario: Preventing deep discharge of Li-ion batteries in unmanned aerial vehicles during extended missions. IC Role / Device Role / Timing Role: Comparator A senses battery voltage against internal 1.182V reference; HYST pin adds 20mV hysteresis to prevent oscillation near cutoff. Use Value: 4µA quiescent current extends standby time to >10 years on typical coin-cell backup - no wake-up circuitry required. |
| Avionics Signal Level Shifting | Ruggedized Threshold Detector |
|
Use Scenario: Converting ±5V analog sensor outputs (e.g., accelerometers) to 0–5V TTL-compatible signals in cockpit displays. IC Role / Device Role / Timing Role: MAX923MJA operates from ±5V supply; IN+ and IN− accept bipolar inputs; OUTA/OUTB swing rail-to-rail. Use Value: No level-shifting resistors or op-amp buffers needed - preserves signal integrity while reducing latency and power. |
Use Scenario: Detecting mechanical switch closure in harsh-environment industrial controllers exposed to EMI and wide temperature swings. IC Role / Device Role / Timing Role: Comparator B compares filtered switch signal to REF; HYST pin rejects contact bounce and conducted noise. Use Value: CERDIP package withstands 1000+ thermal cycles; 40mA output directly drives optocoupler LED - no external driver required. |
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 core functionality but commercial temp range (–40°C to +85°C); SO-8 package; no hermetic seal. | Suitable for industrial automation or test equipment where extended temperature is not required. | Select MAX923ESA for cost-sensitive, non-military designs with standard PCB assembly processes. |
| LM393AMX/NOPB | No internal reference; no HYST pin; open-collector outputs only; 1mA typical supply current. | Requires external reference and hysteresis network; cannot source current - needs pull-up resistors or buffers. | Choose LM393AMX/NOPB only when ultra-low cost dominates and board space/power constraints allow added components. |
Compared with MAX923ESA, MAX923MJA adds hermetic reliability and extended temperature operation at higher cost; compared with LM393AMX/NOPB, it integrates reference and hysteresis control while delivering 40mA sourced output - eliminating ≥5 external components and reducing layout sensitivity.
Availability
MAX923MJA is available at Aetrix Electronics and suitable for aerospace power sequencing, military battery management, and avionics signal conditioning requiring stable component supply across extreme temperature profiles and long production lifecycles.
Supply support for MAX923MJA 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 demanding industrial, automotive, and aerospace applications - emphasizing low power, high reliability, and integrated functionality.
The MAX921–MAX924 family was developed specifically for ultra-low-power, high-stability threshold detection in resource-constrained and mission-critical systems - combining reference, comparator, and hysteresis in compact, temperature-hardened packages.
FAQ
What is the maximum supply voltage for MAX923MJA in single-supply operation?
The MAX923MJA supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains full specification compliance including ≤4µA quiescent current and 1.182V ±1.2% reference accuracy across –55°C to +125°C. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Can MAX923MJA operate from a dual ±5V supply?
Yes, MAX923MJA operates from dual supplies ranging from ±1.25V to ±5.5V. When powered from ±5V, its outputs swing fully from –5V to +5V, and the internal 1.182V reference remains referenced to V− (–5V), yielding a REF voltage of –3.818V relative to GND - enabling precise bipolar threshold detection.
How is hysteresis implemented on both comparators in MAX923MJA?
MAX923MJA uses a single HYST pin to apply identical, resistor-programmable hysteresis to both comparators. Connecting R1 between REF and HYST, and R2 between HYST and V−, sets the HYST voltage (REF – 50mV min to REF max), which determines the total hysteresis band (up to 100mV) applied to both INA+/INB− inputs.
Is the REF pin of MAX923MJA referenced to GND or V−?
The REF pin of MAX923MJA is referenced to V−, not GND. Its output is 1.182V above V−, meaning REF = V− + 1.182V. This is critical for dual-supply operation: with V− = –5V, REF = –3.818V relative to GND. Bypassing REF is strictly prohibited as it degrades reference accuracy and stability.
What package type and qualification does MAX923MJA use?
MAX923MJA is packaged in an 8-pin CERDIP (Ceramic Dual In-line Package) qualified for –55°C to +125°C operation. It meets MIL-PRF-38535 requirements for high-reliability applications, featuring hermetic sealing, low moisture permeability, and proven performance under thermal shock and vibration stress.
MAX923MJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Push-Pull, 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):
- 4.5µA
- Current - Quiescent (Max):
- -80dB, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-CERDIP
MAX923MJA FAQ
1.How can I place an order for MAX923MJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923MJA 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 MAX923MJA reliable?
The price and inventory of MAX923MJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923MJA is usually 5 days.
3.What payment methods are accepted for MAX923MJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923MJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923MJA?
MAX923MJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923MJA 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 MAX923MJA?
For technical support, including MAX923MJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923MJA requirements.
6.How does Aetrix verify that MAX923MJA is sourced from the original manufacturer or authorized distributors?
All MAX923MJA 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 MAX923MJA meets industry standards.
7.What is the process for return or replacement of MAX923MJA?
All MAX923MJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX923MJA, 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 MAX923MJA part is unused and in its original packaging.
Return procedure for MAX923MJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923MJA Tags
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