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Analog Devices Inc./Maxim Integrated MAX974CPE+
- Part No.:
- MAX974CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX974CPE+.pdf
- Description:
- IC COMPARATOR OD 16-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,725
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Product details
Overview
MAX974CPE+ from Maxim Integrated is a quad ultra-low-power open-drain comparator with integrated 1.182V ±1% bandgap reference, 4µA max supply current at +25°C, 12µs propagation delay (10mV overdrive), and operation from single 2.5V–11V or dual ±1.25V–±5.5V supplies. It features separate GND pin for output transistors and rail-to-rail input range down to V− and within 1.3V of V+, enabling use in battery-powered threshold detection and level translation.
For engineers reviewing the MAX974CPE+ datasheet, MAX974CPE+ pinout, MAX974CPE+ application, or MAX974CPE+ equivalent, this page delivers verified specifications, validated pin functions, confirmed quad-comparator timing behavior, and real-world design context for low-voltage industrial sensing and power-good monitoring.
Technical Context
The MAX974CPE+ integrates four independent comparators sharing a precision internal reference and common supply rails. Each comparator has an open-drain output sinking to GND (not V−), enabled by its dedicated GND terminal - a key distinction from MAX972/MAX973 variants that sink to V−. Input common-mode range extends from V− to (V+ − 1.3V), supporting accurate sensing near supply rails.
Unlike MAX971/MAX973, the MAX974CPE+ lacks a HYST pin and does not support internal programmable hysteresis; hysteresis must be implemented externally via positive feedback. Its 16-pin PDIP package accommodates full quad functionality with dedicated pins for all four IN+/IN− pairs, four OUTs, REF, V+, V−, and GND - no shared or multiplexed terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 2.5V–11V or dual ±1.25V–±5.5V - supports direct interface with 3V/5V logic and bipolar analog stages. |
| Quiescent Supply Current | ≤4µA at +25°C - enables multi-year operation on coin-cell batteries in always-on monitoring circuits. |
| Reference Voltage Accuracy | 1.182V ±1% (0°C to +70°C) - provides stable, factory-trimmed threshold for precision undervoltage/overvoltage detection. |
| Propagation Delay | 12µs typical (10mV overdrive, 100pF load, 1MΩ pullup) - balances speed and ultra-low power for non-critical timing applications. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals referenced to negative rail or ground in single-supply systems. |
| Output Sink Capability | 50mA max per output (VOUT = 0.4V, V+ = 5V) - drives LEDs, MOSFET gates, or logic inputs without external buffers. |
| Reference Output Drive | ±25µA (source/sink) - sufficient to bias external resistor dividers for adjustable thresholds without loading error. |
Pinout & Package
MAX974CPE+ uses a 16-pin plastic DIP (dual in-line package) with 0.300" wide body and 0.100" pin pitch. Pin 1 is top-left corner when notch faces up; pin numbering proceeds counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of Comparator A; sinks current to GND (Pin 14), not V− - enables true level shifting between isolated domains. |
| 2 | OUTB | Open-drain output of Comparator B; electrically isolated from OUTA; requires individual pullup for wire-OR configuration. |
| 3 | OUTC | Open-drain output of Comparator C; shares no internal connection with other outputs - supports independent control signals. |
| 4 | OUTD | Open-drain output of Comparator D; fully decoupled; usable as discrete alarm or status indicator. |
| 5 | IND+ | Noninverting input of Comparator D; accepts voltages from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage). |
| 6 | IND− | Inverting input of Comparator D; matched offset and CMRR to IND+; differential input stage rejects common-mode noise. |
| 7 | INC+ | Noninverting input of Comparator C; identical electrical specs to IND+; supports independent window or threshold comparison. |
| 8 | INC− | Inverting input of Comparator C; paired with INC+ for precise voltage window detection. |
| 9 | V− | Negative supply rail; connect to GND in single-supply mode; defines reference point for REF and input common-mode range. |
| 10 | REF | 1.182V ±1% reference output referenced to V−; supplies stable threshold for all four comparators; not bypassed. |
| 11 | INB+ | Noninverting input of Comparator B; supports rail-sensing applications such as battery voltage monitoring. |
| 12 | INB− | Inverting input of Comparator B; used with INB+ to detect crossing of fixed or divider-derived thresholds. |
| 13 | INA+ | Noninverting input of Comparator A; primary input for power-good or enable signal generation. |
| 14 | GND | Dedicated ground for all four output transistors; separates output return path from V−, enabling bipolar-to-single-ended conversion. |
| 15 | INA− | Inverting input of Comparator A; commonly tied to REF or resistor divider for fixed-threshold detection. |
| 16 | V+ | Positive supply rail; supplies internal reference and comparator core; total supply (V+ − V−) ≤ 11V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four fully isolated channels with dedicated inputs/outputs - eliminates cross-talk and enables simultaneous multi-threshold monitoring. |
| Separate GND pin for outputs | Enables level-shifting between domains where V− ≠ GND (e.g., ±5V analog stage to 3.3V digital logic). |
| Integrated ±1% 1.182V reference | Removes need for external precision reference IC or resistor divider - reduces BOM count and layout area. |
| Rail-to-rail input capability | Accepts signals from V− to (V+ − 1.3V) - supports direct sensing of battery voltage, supply rails, or sensor outputs without level shifters. |
| Ultra-low 4µA supply current | Extends battery life in portable medical devices, IoT sensors, and remote telemetry nodes operating for >5 years on CR2032. |
Applications
| Battery Voltage Monitoring | Power-Good Sequencing |
|---|---|
Use Scenario: Monitoring 3-cell Li-ion pack (9–12.6V) to trigger low-battery alert and prevent deep discharge. IC Role / Device Role / Timing Role: Comparator A and B compare divided pack voltage against REF-derived thresholds for under/over-voltage detection. Use Value: Quad structure allows simultaneous monitoring of charge/discharge limits and thermal cutoffs without external logic. |
Use Scenario: Validating correct startup sequence of FPGA, microcontroller, and analog subsystems in embedded controllers. IC Role / Device Role / Timing Role: Four comparators independently verify 1.2V, 1.8V, 3.3V, and 5V rails meet tolerance before releasing reset. Use Value: Eliminates need for four discrete comparators or complex supervisor IC - reduces cost and board space by 40%. |
| Window Detector for Sensor Signals | Level Translation Interface |
Use Scenario: Detecting out-of-range output from temperature sensor (e.g., TMP36) indicating fault or calibration drift. IC Role / Device Role / Timing Role: Comparator C and D form window detector using REF-based upper/lower thresholds on same analog input. Use Value: Internal reference ensures consistent hysteresis-free window width across temperature and supply variation. |
Use Scenario: Converting ±5V op-amp output to 3.3V logic-compatible signal for ADC input in mixed-signal data acquisition. IC Role / Device Role / Timing Role: Comparator A acts as level shifter: IN+ tied to REF, IN− receives ±5V input, OUTA pulls to GND when input > REF. Use Value: Dedicated GND pin isolates digital ground from analog V−, preventing ground loop noise injection into sensitive analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX974CSE+ | Same electrical specs and pinout, but in 16-pin narrow SO package - 50% smaller footprint, surface-mount only. | Preferred for space-constrained PCBs; requires reflow assembly; not socket-compatible with DIP. | Select MAX974CSE+ when board area is critical and automated assembly is available. |
| MAX984CPE+ | Quad comparator with ±2% reference (1.182V ±2%), otherwise identical pinout, supply, and timing specs. | Suitable for cost-sensitive applications where ±2% threshold accuracy is acceptable (e.g., gross battery state indication). | Select MAX984CPE+ when budget constraints outweigh need for ±1% reference precision. |
Compared with MAX974CPE+, MAX974CSE+ offers identical performance in a compact SOIC package ideal for high-density layouts, while MAX984CPE+ trades reference accuracy for lower unit cost - both retain full functional compatibility but differ in physical implementation and tolerance grade.
Availability
MAX974CPE+ is available at Aetrix Electronics and suitable for battery-powered systems, power-supply sequencing, sensor interface circuits, and industrial monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX974CPE+ 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 industrial, automotive, and communications markets, emphasizing low power, high integration, and reliability.
The MAX97x/MAX98x comparator family targets ultra-low-power sensing and monitoring applications, delivering micropower operation with integrated references to simplify power-rail supervision and threshold detection.
FAQ
What is the maximum supply voltage for MAX974CPE+?
The MAX974CPE+ supports a maximum total supply voltage of 11V - meaning (V+ − V−) ≤ 11V. When operated from a single supply, V− is connected to GND, so V+ may range from 2.5V to 11V. In dual-supply mode, it accepts ±1.25V to ±5.5V, maintaining the same 11V total differential limit. Exceeding 11V risks permanent damage per Absolute Maximum Ratings.
Does MAX974CPE+ support internal hysteresis like MAX973?
No, MAX974CPE+ does not include a HYST pin or internal hysteresis circuitry. Unlike MAX973 or MAX983, it requires external positive feedback (e.g., resistor from OUT to IN+) to implement hysteresis. This is confirmed in the Pin Description table and Applications Information section, which explicitly states hysteresis capability applies only to MAX971/MAX982/MAX973 variants.
Can MAX974CPE+ operate from a 1.8V single supply?
No, MAX974CPE+ is not guaranteed to operate below 2.5V. The datasheet specifies a minimum supply voltage of 2.5V (or ±1.25V) for full specification compliance. While the comparators may function down to ~1V in some conditions, reference accuracy degrades below 2.2V and propagation delay increases significantly - making 1.8V unsuitable for reliable design.
What is the purpose of the separate GND pin (Pin 14) on MAX974CPE+?
The separate GND pin (Pin 14) on MAX974CPE+ provides a dedicated return path for all four open-drain output transistors, electrically isolating them from the V− supply rail. This enables level translation between circuits with different ground potentials - for example, interfacing a ±5V op-amp stage (where V− = −5V) to a 3.3V microcontroller (GND = 0V) without ground-loop interference.
How does the internal reference of MAX974CPE+ differ from MAX984CPE+?
The MAX974CPE+ features a 1.182V reference with ±1% accuracy over 0°C to +70°C, while MAX984CPE+ provides the same nominal voltage but with ±2% accuracy. Both share identical pinout, supply range, and comparator performance - the sole difference is reference tolerance, making MAX974CPE+ suitable for precision thresholding and MAX984CPE+ appropriate for cost-driven applications where looser tolerance is acceptable.
MAX974CPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 4
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 8.5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 16-PDIP
MAX974CPE+ FAQ
1.How can I place an order for MAX974CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX974CPE+ 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 MAX974CPE+ reliable?
The price and inventory of MAX974CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX974CPE+ is usually 5 days.
3.What payment methods are accepted for MAX974CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX974CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX974CPE+?
MAX974CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX974CPE+ 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 MAX974CPE+?
For technical support, including MAX974CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX974CPE+ requirements.
6.How does Aetrix verify that MAX974CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX974CPE+ 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 MAX974CPE+ meets industry standards.
7.What is the process for return or replacement of MAX974CPE+?
All MAX974CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX974CPE+, 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 MAX974CPE+ part is unused and in its original packaging.
Return procedure for MAX974CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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