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Analog Devices Inc./Maxim Integrated MAX924CPE
- Part No.:
- MAX924CPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX924CPE.pdf
- Description:
- IC COMPARATOR 4 W/VOLT REF 16DIP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX924CPE from Maxim Integrated is a quad micropower comparator with internal 1.182V ±1% bandgap reference, TTL/CMOS-compatible outputs, and 4–8.5μA quiescent current (C-temp range). It operates from +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply, supports rail-to-rail input common-mode range down to V−, and delivers 40mA continuous output source current. It is used in battery-powered threshold detection, window comparators, and low-power oscillator circuits.
For engineers reviewing the MAX924CPE datasheet, MAX924CPE pinout, MAX924CPE application, or MAX924CPE equivalent, key selection criteria include guaranteed 1.182V reference accuracy over 0°C to +70°C, 16-pin PDIP package compatibility, quad-channel independent operation without shared hysteresis, and absence of internal hysteresis (requiring external resistor networks for noise margin).
Technical Context
The MAX924CPE integrates four independent comparators and a precision 1.182V reference referenced to V−, not GND. Each comparator features rail-to-rail input operation (V− to V+ − 1.3V), TTL/CMOS-compatible push-pull outputs swinging from V+ to GND, and no internal hysteresis-requiring external positive feedback for noise immunity.
Its unique output stage continuously sources up to 40mA while eliminating crowbar current during transitions, minimizing supply-line parasitic feedback. The reference provides 15–25μA source capability and ±1% voltage tolerance across 0°C to +70°C, with output noise of 100μVRMS (100Hz–100kHz).
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 use in 3V/5V systems and bipolar signal monitoring. |
| Quiescent Current (C-temp) | 5.5–8.5μA - ensures multi-year battery life in always-on sensor nodes and portable instrumentation. |
| Reference Voltage | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold for accurate voltage monitoring without external references. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows detection of signals near ground or rail in single-supply configurations. |
| Output Drive Capability | 40mA continuous source, 50mA sink - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Propagation Delay | 12μs (10mV overdrive, 100pF load) - supports kHz-range timing and window detection with predictable response. |
| Input Offset Voltage | ±10mV - defines minimum detectable differential voltage without calibration. |
Pinout & Package
MAX924CPE uses a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and 0.1-inch pin pitch. Pin 1 is top-left corner when notch faces up; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - push-pull, swings V+ to GND; sinks/sources current for direct logic or LED drive. |
| 2 | OUTA | Comparator A output - electrically identical to OUTB; independent channel with no shared output structure. |
| 3 | V+ | Positive supply - accepts +2.5V to +11V (single) or +1.25V to +5.5V (dual); powers all comparators and reference. |
| 4 | INA− | Inverting input of comparator A - high-impedance (±0.01nA leakage), supports rail-to-rail common-mode range. |
| 5 | INA+ | Noninverting input of comparator A - matched to INA−; offset voltage ±10mV defines threshold resolution. |
| 6 | INB− | Inverting input of comparator B - fully independent; no crosstalk or shared bias with other channels. |
| 7 | INB+ | Noninverting input of comparator B - same electrical specs as INA+/INA−; enables dual-threshold designs. |
| 8 | REF | 1.182V reference output - referenced to V−, not GND; supplies stable voltage for external resistor dividers. |
| 9 | V− | Negative supply - connect to GND for single-supply operation; sets reference and input lower bound. |
| 10 | INC− | Inverting input of comparator C - fourth independent channel; supports multi-level window or sequencing logic. |
| 11 | INC+ | Noninverting input of comparator C - matches INC− specs; enables precise trip-point setting per channel. |
| 12 | IND− | Inverting input of comparator D - completes quad configuration; no internal hysteresis on any channel. |
| 13 | IND+ | Noninverting input of comparator D - full 4-channel independence confirmed in functional diagram and pin table. |
| 14 | GND | Ground - connects to V− for single-supply use; separates output driver return from analog reference path. |
| 15 | OUTD | Comparator D output - identical sourcing/sinking capability; supports parallel or cascaded logic decisions. |
| 16 | OUTC | Comparator C output - independent drive; enables simultaneous control of four discrete system states. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four fully isolated channels with separate inputs/outputs - eliminates inter-channel coupling in multi-threshold systems. |
| No internal hysteresis | Requires external resistor networks - gives designers full control over hysteresis width and placement per channel. |
| 40mA continuous output source | Drives LEDs, small solenoids, or CMOS/TTL loads directly - removes need for external driver transistors. |
| 1.182V ±1% internal reference | Factory-trimmed bandgap referenced to V− - reduces BOM count and improves long-term stability vs. external refs. |
| Rail-to-rail input common-mode | V− to V+ − 1.3V - enables accurate sensing at ground or near-V+ in low-voltage battery systems. |
| No crowbar switching current | Eliminates supply glitches during output transitions - prevents false triggering in noise-sensitive analog subsystems. |
Applications
| Battery-Powered Threshold Detector | Quad Window Comparator |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging to trigger cutoff at 4.2V (overvoltage) and 2.8V (undervoltage). IC Role / Device Role / Timing Role: MAX924CPE acts as four independent voltage comparators, each configured with resistor dividers to set precise thresholds using its internal 1.182V reference. Use Value: Enables accurate, low-power protection without external reference ICs; 8.5μA total quiescent current extends battery runtime in portable medical devices. |
Use Scenario: Detecting valid operating voltage windows in industrial PLC I/O modules powered from 24V DC rails. IC Role / Device Role / Timing Role: MAX924CPE implements two independent window detectors (A/B and C/D pairs), each comparing input against upper/lower thresholds derived from REF. Use Value: Quad integration reduces PCB area by 50% vs. discrete dual-comparator solutions; 40mA output drives status LEDs directly. |
| Oscillator Circuit | Level-Shifting Interface |
|
Use Scenario: Building a relaxation oscillator for low-frequency clock generation in energy-harvesting sensor nodes. IC Role / Device Role / Timing Role: MAX924CPE comparator A forms the core of a hysteresis-based RC oscillator; comparator B monitors supply voltage for brownout protection. Use Value: Internal reference and rail-to-rail inputs allow stable oscillation from 1.8V to 5.5V supply; no external components needed for reference. |
Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauges) into 0V/5V logic levels for microcontroller ADC input. IC Role / Device Role / Timing Role: MAX924CPE comparator A compares bipolar input against 0V (GND), using REF and resistor network to set zero-crossing point. Use Value: Single-supply operation with V− = GND and V+ = 5V simplifies power design; TTL-compatible outputs interface directly with MCU GPIO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N | Quad comparator with no internal reference; 2.0mA typical supply current; open-collector outputs requiring pull-up resistors. | Lacks integrated 1.182V reference and 40mA sourcing capability - requires external reference and buffer stages for same functionality. | Select LM339N only if ultra-low cost is critical and board space/power budget allow added components. |
| TLV3704CDR | Rail-to-rail input/output; 1.6μA supply current; no internal reference; 5.5V max supply; SOIC-14 package. | Lower quiescent current but no reference or high-drive outputs - unsuitable for direct LED driving or self-contained threshold detection. | Choose TLV3704CDR for ultra-low-power, low-voltage (<5.5V) applications where external reference is already present. |
Compared with LM339N and TLV3704CDR, the MAX924CPE uniquely combines integrated precision reference, 40mA sourcing, and 8.5μA quiescent current in a single 16-pin DIP - making it optimal for compact, self-contained, battery-operated threshold detection systems.
Availability
MAX924CPE is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial voltage monitoring, and low-power sensor interface applications requiring stable component supply and long-lifecycle support.
Supply support for MAX924CPE 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, with emphasis on low-power, high-reliability solutions.
The MAX921–MAX924 family was developed specifically for micropower, single/dual-supply comparator applications demanding integrated reference, rail-to-rail inputs, and robust output drive - targeting portable, automotive, and industrial systems.
FAQ
What is the maximum supply voltage for MAX924CPE in single-supply operation?
The MAX924CPE supports a single-supply voltage range of +2.5V to +11V. When operated with V− tied 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. Operation at +11V is validated across the 0°C to +70°C commercial temperature range for the MAX924CPE variant.
Does MAX924CPE include internal hysteresis?
No, the MAX924CPE does not include internal hysteresis. Unlike the MAX921 and MAX923, the MAX924 requires external positive feedback networks (e.g., resistors between output and IN+ or IN−) to implement hysteresis. This is explicitly stated in the ordering information table and functional diagrams, and confirmed by the absence of a HYST pin on the MAX924 pinout.
Can MAX924CPE operate from a 3.3V supply?
Yes, the MAX924CPE is fully specified for operation from +2.5V to +11V single supply, including 3.3V. At 3.3V, typical supply current is 5.2–6.2μA (C-temp), propagation delay is 14μs (10mV overdrive), and output high voltage remains V+ − 0.4V - ensuring reliable TTL/CMOS interfacing in modern low-voltage systems.
What is the function of the REF pin on MAX924CPE?
The REF pin on MAX924CPE outputs a precision 1.182V ±1% voltage referenced to V− (not GND). It is designed to supply stable bias for external resistor divider networks that set comparator thresholds. The REF pin can source up to 25μA and sink up to 15μA, and must not be bypassed - as capacitive loading degrades noise performance and stability.
Is MAX924CPE pin-compatible with other MAX92x series devices?
No, MAX924CPE is not pin-compatible with MAX921, MAX922, or MAX923. It uses a 16-pin PDIP package with dedicated pins for four independent comparators (e.g., OUTA, OUTB, OUTC, OUTD), whereas MAX921–MAX923 use 8-pin packages with fewer channels and different pin assignments (e.g., HYST, shared outputs). Pin compatibility is neither claimed nor supported in the datasheet.
MAX924CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 4
- 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):
- 11µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 16-PDIP
MAX924CPE FAQ
1.How can I place an order for MAX924CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX924CPE 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 MAX924CPE reliable?
The price and inventory of MAX924CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX924CPE is usually 5 days.
3.What payment methods are accepted for MAX924CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX924CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX924CPE?
MAX924CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX924CPE 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 MAX924CPE?
For technical support, including MAX924CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX924CPE requirements.
6.How does Aetrix verify that MAX924CPE is sourced from the original manufacturer or authorized distributors?
All MAX924CPE 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 MAX924CPE meets industry standards.
7.What is the process for return or replacement of MAX924CPE?
All MAX924CPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX924CPE, 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 MAX924CPE part is unused and in its original packaging.
Return procedure for MAX924CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX924CPE Tags
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LM339DR
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LM393DR
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LM239DR
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LM2903P
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NCX2200GMAZ
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