My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX912CPE+
- Part No.:
- MAX912CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX912CPE+.pdf
- Description:
- IC COMPARATOR 2 W/LATCH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,009
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX912CPE+ from Maxim Integrated is a dual, ultra-fast, low-power precision TTL comparator with differential inputs and complementary TTL outputs. It delivers 10ns typical propagation delay, ±5V or single +5V supply operation, and stable linear-region behavior-ideal for high-speed switching regulators and V/F converters requiring precise zero-crossing detection without hysteresis.
For engineers reviewing the MAX912CPE+ datasheet, MAX912CPE+ pinout, MAX912CPE+ application, or MAX912CPE+ equivalent, key selection considerations include latch-enable functionality per channel, input voltage range extending below the negative rail, low 6mA per-comparator supply current at +5V, and guaranteed stability with slow-moving signals.
Technical Context
The MAX912CPE+ integrates two independent high-speed comparators in a single 16-pin plastic DIP package, each featuring TTL-compatible latch control (LEA/LEB), fully differential input amplifiers with trimmed offset, and complementary Q/Q̄ outputs. Its bipolar process enables fast propagation while maintaining low power and wide common-mode input range (–5.2V to +3.5V on ±5V supplies).
Unlike conventional high-speed comparators, the MAX912CPE+ eliminates oscillation in the linear region-no minimum input slew rate required-and avoids resolution loss from externally added hysteresis. Each comparator operates independently with dedicated latch enable, enabling synchronized sampling across channels without cross-talk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 10ns typical (ΔVIN = 100mV, VOD = 20mV); ensures sub-100MHz timing-critical decisions in pulse discriminators and triggers. |
| Supply Voltage Range | +5V single or ±5V dual; supports industrial and telecom systems using standard logic rails or split analog supplies. |
| Input Common-Mode Range | –5.2V to +3.5V (±5V supplies); allows direct interfacing with signals referenced below ground, e.g., sensor outputs or op-amp stages. |
| Supply Current per Comparator | 6mA at +5V (typ); enables battery-sensitive applications like portable test equipment without sacrificing speed. |
| Input Offset Voltage | 0.8mV (typ) at +25°C; provides high DC accuracy for precision level detection in extended-range V/F converters. |
| Latch Enable Function | Dedicated LEA/LEB pins per channel; allows independent synchronous sampling of two analog signals with no shared timing constraints. |
| Output Type | Complementary TTL (Q/Q̄); drives standard logic loads directly without level-shifting or external inverters. |
Pinout & Package
MAX912CPE+ uses a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width, through-hole mounting, and industry-standard pin spacing (0.1 inch). The package includes dual ground pins (pins 3 and 14) and two no-connect pins (5 and 12) to support internal layout isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | QA, QB | TTL output (non-inverted) for comparator A and B; sinks/sourcing capability supports direct connection to 74LS logic. |
| 2, 15 | Q̄A, Q̄B | Complementary TTL output; enables differential signaling or OR/NOR logic functions without external gates. |
| 3, 14 | GND | Logic ground reference; both pins must be connected to system ground to ensure stable latch and output behavior. |
| 4, 13 | LEA, LEB | Latch enable for comparator A/B; TTL-high or floating latches output; TTL-low enables transparent comparison mode. |
| 5, 12 | N.C. | No internal connection; left unconnected per design-no routing or grounding required. |
| 6 | V− | Negative supply terminal; tied to GND for single +5V operation or –5V for dual-supply use with bypass capacitor. |
| 7, 9 | INA−, INB+ | Inverting input (A) and non-inverting input (B); differential pair configuration supports flexible signal routing per channel. |
| 8, 10 | INA+, INB− | Non-inverting input (A) and inverting input (B); full differential flexibility enables either polarity configuration per comparator. |
| 11 | V+ | Positive supply input (+5V); requires local 0.1µF ceramic bypass to GND for noise immunity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Stable linear-region operation | Eliminates need for external hysteresis-preserves full input resolution down to DC and enables accurate slow-signal discrimination. |
| Independent latch control per channel | Enables asynchronous or synchronized sampling of two independent analog signals without inter-channel timing dependency. |
| Input range extends below negative rail | Supports direct interface with bipolar sensors or op-amps operating below ground-no level-shifting circuitry required. |
| Low 6mA supply current per comparator | Reduces thermal load and power supply burden in multi-channel systems such as Ethernet line receivers or multi-phase regulators. |
| No minimum input slew-rate requirement | Validates output integrity even with ramp or triangle wave inputs-critical for V/F converter feedback loops and zero-crossing detectors. |
Applications
| Zero-Crossing Detectors | Ethernet Line Receivers |
|---|---|
|
Use Scenario: Detecting AC waveform polarity transitions in motor control or power metering systems. IC Role / Device Role / Timing Role: Dual comparator monitors live/neutral lines simultaneously; latch enables synchronized edge capture at system clock boundaries. Use Value: 10ns propagation delay and rail-to-rail input range allow precise timing of zero crossings-even under distorted or low-amplitude waveforms-without hysteresis-induced jitter. |
Use Scenario: Recovering digital data from differential analog signals in 10BASE-T Ethernet physical layer receivers. IC Role / Device Role / Timing Role: Converts differential line voltage into clean TTL-level logic; complementary outputs feed downstream Manchester decoder logic. Use Value: Stable linear-region behavior prevents false triggering on line noise or reflections; latch function captures valid data windows aligned to PHY clock domains. |
| Switching Regulators | High-Speed Sampling Circuits |
|
Use Scenario: Monitoring feedback voltage against reference in DC-DC converter error amplifiers and PWM comparators. IC Role / Device Role / Timing Role: Compares regulated output with precision reference; latch holds state during PWM blanking intervals to avoid noise-induced switching errors. Use Value: Input range extending below ground accommodates negative sensing nodes; low 0.8mV offset improves regulation accuracy over temperature. |
Use Scenario: Digitizing analog waveforms in oscilloscopes, spectrum analyzers, or automated test equipment. IC Role / Device Role / Timing Role: Acts as high-speed threshold detector feeding FPGA or microcontroller GPIO; dual channels support interleaved or differential sampling. Use Value: 10ns delay and latch synchronization enable >70MHz effective sampling rates; complementary outputs simplify edge-detection logic in FPGA fabric. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower (1.3µs propagation delay), no latch, open-collector outputs, no linear-region stability guarantee. | Suitable only for low-frequency, non-critical threshold detection-not for V/F converters or high-speed triggers. | Choose LM393DR only when cost is primary constraint and speed/stability requirements are relaxed. |
| LT1719CS8#TRPBF | Faster (4.5ns), rail-to-rail inputs, CMOS outputs, no latch, higher supply current (4mA vs 6mA per comparator). | Better for ultra-high-speed ADC front-ends but lacks latch synchronization-requires external flip-flops for sampled data. | Choose LT1719CS8#TRPBF when maximum speed is critical and latch functionality can be implemented externally. |
Compared with LM393DR and LT1719CS8#TRPBF, the MAX912CPE+ uniquely combines sub-10ns speed, built-in per-channel latch, and guaranteed linear-region stability-enabling high-resolution, jitter-free decision-making in applications where timing integrity and DC accuracy coexist.
Availability
MAX912CPE+ is available at Aetrix Electronics and suitable for switching regulators, Ethernet line receivers, and high-speed sampling circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and telecom deployments.
Supply support for MAX912CPE+ 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, communications, and computing applications.
The MAX912CPE+ belongs to Maxim's high-speed comparator product line, engineered specifically for applications needing simultaneous speed, low power, and DC precision-such as V/F conversion, zero-crossing detection, and synchronous sampling in real-time control systems.
FAQ
What supply voltages does the MAX912CPE+ support?
The MAX912CPE+ operates from a single +5V supply (with V− tied to GND) or dual ±5V supplies. Absolute maximum ratings allow +7V on V+ and –7V on V−, but specified performance-including 10ns propagation delay and 0.8mV offset-is guaranteed only within the +5V/–5V or +5V/GND ranges. Operation at +4.5V minimum single supply is supported, though parameters shift slightly outside nominal conditions.
Does the MAX912CPE+ require external hysteresis for stable operation?
No-the MAX912CPE+ is specifically designed to remain stable in its linear region without external hysteresis. Its unique architecture eliminates oscillation during slow input transitions, preserving full resolution around the zero-crossing point. Adding hysteresis degrades accuracy and is unnecessary; the datasheet explicitly advises against it for highest precision.
How does the latch function work on the MAX912CPE+?
The MAX912CPE+ provides independent latch enable inputs (LEA and LEB) for each comparator. When LEA or LEB is TTL-high or floating, the corresponding QA/Q̄A or QB/Q̄B outputs hold their last valid state. When pulled low, the comparator enters transparent mode and updates outputs in real time based on INA+/INA− or INB+/INB−. This enables synchronized sampling across both channels without shared timing constraints.
What is the input common-mode voltage range of the MAX912CPE+?
On ±5V supplies, the MAX912CPE+ supports an input common-mode range from –5.2V to +3.5V-extending 200mV below the negative rail and 1.5V below the positive rail. In single +5V operation (V− = GND), the range is –0.2V to +3.5V. This allows direct interfacing with signals referenced below ground, such as op-amp outputs or sensor bridges, without level-shifting circuitry.
Can the MAX912CPE+ drive standard TTL logic directly?
Yes-the MAX912CPE+ features true TTL-compatible outputs (QA/Q̄A and QB/Q̄B) capable of sourcing 2.4V/4mA and sinking 0.5V/10mA under standard load conditions. Its VOH and VOL specifications meet 74LS logic thresholds, allowing direct connection to legacy TTL or LSTTL devices without pull-up resistors or buffer stages.
MAX912CPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 2
- Output Type:
- Complementary, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 10V
- :
- 2mV @ ±5V
- Voltage - Input Offset (Max):
- 5µA @ ±5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 10mA
- Current - Quiescent (Max):
- 110dB CMRR, 100dB PSRR
- CMRR, PSRR (Typ):
- 14ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 16-PDIP
MAX912CPE+ FAQ
1.How can I place an order for MAX912CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX912CPE+ 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 MAX912CPE+ reliable?
The price and inventory of MAX912CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX912CPE+ is usually 5 days.
3.What payment methods are accepted for MAX912CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX912CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX912CPE+?
MAX912CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX912CPE+ 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 MAX912CPE+?
For technical support, including MAX912CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX912CPE+ requirements.
6.How does Aetrix verify that MAX912CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX912CPE+ 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 MAX912CPE+ meets industry standards.
7.What is the process for return or replacement of MAX912CPE+?
All MAX912CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX912CPE+, 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 MAX912CPE+ part is unused and in its original packaging.
Return procedure for MAX912CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX912CPE+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
